风力发电电力系统中英文对照外文翻译文献
毕业设计风力发电外文文献
Abstract--The purpose of this paper is to find an innovative, high efficiency, practical and low cost control system structure with an optimized control strategy for small-scale grid-connected wind turbine with direct-driven permanent magnet synchronous generator (PMSG). This research adopts the sensorless vector control strategy based on phase-locked loop (PLL) for PMSG control, and the grid-side inverter control strategy is based on the single-phase PLL. The simulation demonstrates that the sensorless control strategy and single-phase grid-side inverter control strategy are practical solutions for grid-connected PMSG wind turbines, and they can provide both generator speed control for optimized wind power tracking and good power quality control for electricity delivered to the grid. The designed system offers many unique advantages, including simple topology, optimized control strategy, cost-effective and fast respond to grid failures.Index Terms--Maximum power point tracking (MPPT), PMSG, pulse-width modulation (PWM) converter, speed control, variable-speed wind turbine.I. I NTRODUCTIONn recent years, great attention has been paid on renewable energy sources, such as wind and solar energy. Wind energy is the most popular renewable energy source due to its relatively low cost. The overall system cost can be further reduced by optimal control of high efficiency power electronic converters to extract maximum power in accordance with atmospheric conditions [11].The wind energy conversion system based on permanent magnet synchronous generator (PMSG) is one of the most favorable and reliable methods of power generation. Reliability of variable-speed direct-driven PMSG wind turbines can be improved significantly comparing to doubly-fed induction generator (DFIG) wind turbines with gearboxes. Noise, power loss, additional cost, and potential mechanical failure are typical problems for a DFIG wind turbine because of the existence of a gearbox. The use of direct-driven PMSG could solve these problems. Moreover, low voltage ride through (LVRT) is also a big issue for DFIG because the This work was supported in part by the special funds from Beijing Municipal Education Commission.Chunxue Wen, Guojie Lu, Peng Wang and Zhengxi Li are with the Power Electronics and Motor Drivers Engineering Research Centre, North China University of Technology,Beijing,China(e-mail: wenchx1980@, lugod307@, catdapeng2008@, lzx@).Xiongwei Liu and Zaiming Fan are with the School of Computing, Engineering and Physical Sciences, University of Central Lancashire, Preston, PR1 2HE, UK (e-mail: xliu9@, zmfan@) electromagnetic relationship between the stator and the rotor is more complex than PMSG. Therefore, it’s more difficult for DFIG to solve LVRT problem safely and reliably.In a variable-speed PMSG system, vector control approach is often used to achieve nearly decoupled active and reactive power control on the grid-side inverter which is a current regulated voltage source inverter. In this way, the power converter maintains the DC-link voltage and improves the power factor of the system [1], [7], [10]. Different control methods for maximum power point tracking (MPPT) in variable-speed wind turbine generators have been discussed in [2], [4], [7].This research adopts the sensorless vector control strategy based on phase-locked loop (PLL) for PMSG control [2]. The method requires only one active switching device, i.e. insulated-gate bipolar transistor (IGBT), which is used to control the generator torque and speed so as to extract maximum wind power. It is a simple topology and low cost solution for a small-scale wind turbine because of the sensorless vector control strategy. The grid-side inverter control strategy is based on the single-phase PLL, which applies a control method in Direct-Quadrature (DQ) rotating frame to single-phase inverter and achieves superior steady state and dynamic performance [6].For small-scale wind turbine, single-phase power supply to consumers is popular. There are many control methods for single-phase inverter, such as PI controller, quasi-PR controller, etc. [5]. However, these methods can’t decouple the active power and reactive power so as to have good power control performance. Single-phase PLL method based on DQ rotating frame can well solve this problem. On the other hand, encoders are vulnerable components for wind turbines, particularly for small wind turbines, because small wind turbines experience severer vibrations than their large counterparts. The sensorless vector control opts out the encoders, and therefore the reliability of wind turbines is much improved. For these reasons, the sensorless vector control and single-phase PLL method have their unique advantages for small-scale wind turbines.This paper is structured further in following three sections. In section II, the principle of the full power back-to-back PWM converter is introduced. Then the vector control of small-scale grid-connected wind power system including sensorless control, vector control of PMSG, single-phase PLL, vector control of grid-side inverter are described in section III. Finally, in section IV, the simulation results and conclusion are given.Vector control strategy for small-scale grid-connected PMSG wind turbine converter Chunxue Wen, Guojie Lu, Peng Wang, Zhengxi Li Member IEEE, Xiongwei Liu Member IEEE,Zaiming Fan Student Member IEEEIII. T HE PRINCIPLE OF FULL POWER BACK-TO-BACK PWMCONVERTERTypical topology model of direct-driven PMSG wind turbine is shown in Fig. 1. Converters of the system adopt back-to-back pairs of pulse-width modulation (PWM) architecture. The generator-side converter controls the generator speed in order to achieve maximum capture of wind power, and the grid-side inverter controls the stability of DC-bus voltage and the power factor of the system. This topology can be a good way to improve performance, and the control method is flexible. Converters have four-quadrant operation function, which can fulfill the generator speed control anddeliver the fine quality of electricity to the grid [7], [8].Fig. 1. Topology of permanent magnet direct-driven wind power systemIII. T HE VECTOR CONTROL OF SMALL-SCALE GRID-CONNECTEDDIRECT-DRIVEN WIND POWER SYSTEM CONVERTERFig. 2 shows the back-to-back PWM voltage convertervector control block diagram. The machine-side PWMconverter controls the electromagnetic torque and statorreactive power (reactive power is often be set to 0) byadjusting the current of the d-axis and q-axis of the machine-side converter. This control mechanism helps the PMSG tooperate in variable speed, so that the wind turbine can workwith maximum power point tracking (MPPT) under the ratedwind speed. The grid-side PWM inverter stabilizes the DC-busvoltage and accomplishes active and reactive decouplingcontrol by adjusting the current of the d-axis and q-axis of thegrid-side. The grid-side PWM inverter also controls thereactive power flow to the grid, usually at unity power factorcondition.A. Sensorless control based on PLLThe speed and position control is achieved throughsensorless vector control of the machine-side converter basedon all-digital phase-locked loop. The phase-locked loop isdesigned to control the frequency of the D-Q axis voltagethrough minimizing the difference of the output voltage phaseangle and the given voltage phase angle, until the outputvoltage phase angle tracks the given voltage phase angle. Asthe phase-locked loop has frequency closed-loop trackingmechanism, the generator voltage frequency and the anglebetween d-axis voltage and rotor flux can be measured withthis characteristic, then the generator speed and rotor positionangle can be derived [2]. The control accuracy is generallygood using this method, however some problems may occurwhen the generator operates at very low speed. The windpower system often works above the cut-in wind speed, so thismethod can be applied to wind power generation system.Fig. 2.The back-to-back PWM voltage converter vector control block diagramThe actual rotor position of PMSG is indicated in the D-Q coordinate system. The estimated location for ∧θ is the d q ∧∧− coordinate system, αβ is the stationary coordinate system, as shown in Fig. 3. As the rotor position of PMSG is estimated rather than measured in the sensorless vector control system, there exists an error θΔ between the actual rotor position θ and the estimated location ∧θ. At the same time, the back-EMF (electromotive force) generated by the rotor permanent magnets generates two d-axis and q-axis components in the estimated rotor position orientation coordinates, which are expressed as sd e ∧and sq e ∧respectively. Conventional PI controller can achieve zero error control, i.e. sd e ∧or θΔ can be adjusted to zero value. The PLL sensorless vector control schematic diagram is shown in Fig. 4, and the value of sd e ∧and sq e ∧can be obtained from (1).sd sd s sd dq sq sd sq sq s sq q d sd sq di u R i L L i e dt di u R i L L i e dt ωω∧∧∧∧∧∧⎧=+−−⎪⎪⎨⎪=+++⎪⎩(1)Fig. 3. Presumed rotating coordinate systemFig. 4. Principle of PLL based sensorless vector controlIf we ignore the current differential items in (1), then wehavesd s sd q sq sd sq sq s sq d sd ˆˆˆˆˆarctan(arctan(ˆˆˆˆˆu R i L i ee uR i L i ωθω−+Δ=−=−−− (2)where sd u , sq u , sd i and sq i are the d, q-axis components of the output voltage and current of the generator stator; d L q L and s R are the inductance and resistance of the stator; ω is thegenerator electrical angular velocity of the generator; "∧" indicates estimated value.Block diagram of sensorless vector control based on digital PLL is shown in Fig. 5. The back-EMF (electromotive force) value of the estimated rotating coordinates can be obtained by calculating the three-phase voltages and currents of the PMSGstator. The calculated angle difference θΔcan be used to estimate the angular velocity through the PI controller. Then the value of the estimated angle can be obtained by integral element. Generally, the speed has considerable fluctuations using this method. Therefore it will achieve a better estimation by adding a low-pass filter (LPF), as shown in Fig. 5.∧Fig. 5. Block diagram of sensorless vector control based on digital PLLB. Vector control of PMSGIn order to study the torque control of PMSG, it is necessary to establish a mathematical model. Because q-axis leads d-axis 90° in the D-Q coordinate system, the generator voltage equation can be expressed as [8]: sd sd s sd d sq sq sq sq sq q d sd di u R i L L i dt di u Ri L L i dt ωωωψ⎧=+−⎪⎪⎨⎪=+++⎪⎩(3) The significance of various physical quantities in (3) is the same as in (1).The generator electromagnetic torque equation can be expressed as:33()22e sq d q sd sq T p i p L L i i ψ=+− (4) where p is the number of generator pole pairs, and ψ is the magnetic flux.Based on the above mathematical model, the sensorless vector control program of PMSG is established, and its controlblock diagram is shown in Fig. 6.sa i sbi Fig. 6. Sensorless vector control block diagram of PMSGGenerator rotor position and speed which are estimated by sensorless algorithm can be used in vector control. Thereference value of motor torque can be obtained by the speedcontroller. The voltage reference of generator can also be gotby current controller, and then the control signals of rectifier switching device can be obtained by a set of PWM modulation algorithms. The position and speed of generator rotor which is necessary to vector control is obtained by sensorless algorithm.C. Single-phase grid-connected PLLFig. 7 shows the block diagram of the single-phase gird-connected PLL. In order to ensure that the converter outputvoltage is in the same phase with the output current, the PLLis used to achieve unity power factor control. At the sametime, the converter also provides the angle of the referencecurrent transformation [5].Fig. 7. The block diagram of the single-phase PLLThe transformation between orthogonal a-b and D-Q reference frames can be described by trigonometric relations, which are given in (5) and (6), and the rotating reference frame is shown in Fig. 8.Fig. 8. Definition of rotating reference frame⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡−=⎥⎦⎤⎢⎣⎡b a q d f f f f θθθθcos sin sin cos (5) ⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡−=⎥⎦⎤⎢⎣⎡q d b a f f f f θθθθcos sin sin cos (6)Active power and reactive power equations can beexpressed as:⎩⎨⎧−=+=d q q d qq d d i v i v Q i v i v P (7) If the phase voltage and q-axis coincide, then 0=d v andv v q =, active power and reactive power equations can besimplified as:||||q dP v i Q v i =⎧⎪⎨=−⎪⎩ (8) D. The vector control strategy of the grid-side inverterFor a three phase converter, simple PI compensators designed in a D-Q synchronous frame can achieve zero steady state error at the fundamental frequency, but this method is not applicable to single-phase power converter because there is only one phase variable available in a single-phase power converter, while the D-Q transformation needs at least two orthogonal variables.In order to construct the additional orthogonal phaseinformation from the original single-phase power converter,the imaginary orthogonal circuit is developed, as shown inFig. 9. The imaginary orthogonal circuit has exactly the samecircuit components and parameters, but the current b i and the voltage b e , maintain 90D phase shift with respect to their counterparts in the real circuit- a i and a e [6].Fig. 9. Real circuit and its imaginary orthogonal circuitFrom Fig. 9, the voltage equation can be expressed as:⎥⎦⎤⎢⎣⎡−−+⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡−=⎥⎦⎤⎢⎣⎡b b a a b a b a v e v e L i i L R i i p 11001 (9) Transforming the voltage equations into the synchronousreference frame using (5) and (6), and considering 0=d v and v v q =, we have: ⎥⎦⎤⎢⎣⎡−+⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡−−−=⎥⎦⎤⎢⎣⎡||1//v e e L i i L R L R i i p qd q d q d ωω (10) To achieve decoupled control of active power and reactive power, the output voltage of the inverter in the synchronousreference frame can be expressed as:||)(1v i x L e d q +−=ω (11))(2q d i x L e ω+= (12)Substituting (11) and (12) into (10), system equations canbe rewritten as follows:⎥⎦⎤⎢⎣⎡+⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡−=⎥⎦⎤⎢⎣⎡211001x x i i L R i i p q d q d (13) The active power and reactive power could be controlled by d i and q i respectively. Therefore, system control can be completed by current feedback loops as follows:))((211q q i i s k k x −+=∗(14)))((212d d i i sk k x −+=∗(15) Fig. 10 shows the control block diagram of the grid-sideinverter. It should be noted that the given active and reactive power should be set at two times of the desired values, because the imaginary circuit will not deliver any active andreactive power to the grid.θωFig. 10. The vector control block diagram of the grid-side inverterIV. S IMULATION RESULTSA simulation model in Matlab/Simulink is developed based on above theoretical analysis, and the system simulation block diagram is shown in Fig. 11.Fig. 11. The system simulation block diagramA. The simulation results of the machine-side converterIn the simulation model, the Reference speed represents the wind speed. At the beginning of the simulation (i.e. 0s), the generator speed is 4rpm and its input torque is -50Nm. At the time of 0.5s, the generator speed is 17 rpm and the input torque maintains at the value of -50Nm. At 1s, the generator speed maintains at 17 rpm and the input torque is -80Nm. The simulated waveforms are shown in Fig. 12, Fig. 13, Fig. 14, Fig. 15, respectively.It can be seen from Fig. 12 and Fig. 13, the error between the estimated rotor position angle and the actual measurement of the rotor position angle is very small in the steady state, there are some fluctuations in the dynamic response, but the rotor position angle is stabilized quickly.It can be seen from Fig. 14 and Fig. 15, there is a small error between the estimated and measured generator rotor speed at low speed. At high speed, however, the error is very small and can be ignored, and the transient response is very short. At the time 1s, the input torque increase affects thegenerator rotor speed slightly, and soon the transientdisappears.ˆ,(d e g )θθ()t sFig. 12. The estimated and measured rotor position angle(rad/s)θθ∧−(s)tFig. 13. The error of estimated and measured rotor position anglet(s)()nrpmFig. 14. The measured generator rotor speedt(s)t()esirpmnFig. 15. The estimated generator rotor speedThe simulation waveforms of the machine-side converterdemonstrate that the sensorless vector control algorithm canestimate the rotor angular position accurately, and the vectorcontrol strategy of the machine-side converter can realizegenerator speed control for the wind turbine to follow theoptimized power curve, i.e. MPPT when the wind speed isbelow rated wind speed.B. The simulation results of the grid-side inverterThe simulation results of the grid-side inverter is shown inFig. 16, Fig. 17 and Fig. 18 respectively.It can be seen from Fig. 16, when the generator outputtorque increases, the DC bus voltage is maintained constant.Fig. 17 shows that θu followsavvery well, and Fig. 18shows thatai followsavvery well.Fig. 16. The simulated DC voltageavuθuθFig. 17. The generator output A phase voltage and the grid voltage vectorangleFig. 18. The output voltage and current of the grid-side inverterFrom the simulation results of the grid-side inverter, it canbe seen that the single-phase PLL algorithm can accuratelytrack the grid-side voltage, and the vector control strategy ofthe grid-side inverter can stabilize the DC bus voltage, andcontrol the grid power factor.V. C ONCLUSIONThis research developed a power electronic converter for asmall direct-driven PMSG wind turbine using the back-to-back pulse-width modulation (PWM) topology. Thesimulation results demonstrate that1) The machine-side converter can control the generatorspeed and torque for the wind turbine to follow the optimizedpower curve, i.e. maximum power point tracking (MPPT)when the wind speed is below rated wind speed.2) The sensorless phase-locked loop (PLL) controlalgorithm can realize the vector control of the generator.3) The grid-side inverter control algorithm based on single-phase PLL can stabilize the DC bus voltage of the converter and control the grid power factor.VI. R EFERENCESPeriodicals:[1]De Tian, “The wind power technology status and development trend inthe world,” New Energy Industry, in press.[2]Ruzhen Dou, Lingyun Gu, Baotao Ning, “Sensorless control of thePMSM based on the PLL,” Electric Machines & Control Application, vol. 32, pp. 53-57, 2005.Books:[3]Qingding Guo, Yibiao Sun, Limei Wang, Modern permanent magnet ACservo motor system. China Electric Power Press, Beijing. In press.Papers from Conference Proceedings (Published):[4]S. Song, S. Kang, and N. Hahm, “Implementation and control of gridconnected AC-DC-AC power converter for variable speed wind energy conversion system,” in Proc. 2003 IEEE Applied Power Electronics Conference and Exposition, vol.1, pp.154 – 158.[5]M. Ciobotaru, R. Teodorescu and F. Blaabjerg, “A new single-phasePLL structure based on second order generalized integrator,” Record of IEEE PESC 2006, Korea, pp.1511-1516.[6]R. Zhang, M. Cardinal, P. Szczesny, M. Dame, “A grid simulator withcontrol of single-phase power converters in D-Q rotating frame,” Power Electronics Specialists Conference, vol.3, pp.1431 – 1436, 23-27 June 2002.[7]R. Esmail, L. Xu, D.K. Nichols, “A new control method of permanentmagnet generator for maximum power tracking in wind turbine application,” IEEE Power Engineering Society Meeting, vol.3, pp. 2090-2095, August 2005.[8]Yang Zhenkun, Liang Hui, “A DSP control system for the gridconnected inverter in wind energy conversion system,” IEEE ICEMS 2005 Electrical Machines and Systems, vol. 2, 2005, pp. 1050-1053, June 2005.[9]N V Suresh Kumar Srighakollapu, Partha Sarathi Sensarma, “Sensorlessmaximum power point tracking control in wind energy generation using permanent magnet synchronous generator,” Industrial Electronics 2008, 34th Annual Conference Of IEEE, Iecon , pp.2225-2230.Dissertations:[10]Cheng Lu, “The coordination control of dual PWM converter for VSCFwind power generation system,” MSc thesis, Graduate School of Chinese Academy of Sciences, Beijing, 2004.[11]Shenbing Wu, “Research on CSC-based small-scale grid-connectedwind power generation system”, MSc thesis, Hefei University of Technology, Hefei, 2009.VII. B IOGRAPHIESChunxue Wen received his BSc degree from Inner Mongolia University of Technology in 2001, MSc degree from Wuhan University in 2006, and PhD degree from the Institute of Electrical Engineering, Chinese Academy of Sciences in 2009. In 2010 he joined the Wind Energy Engineering Research Group at the University of Central Lancashire as a visiting researcher. He is currently working as a Lecturer at the Power Electronics and Motor Drivers Engineering Research Center, North China University of Technology, Beijing, China. His research interests include power electronics, wind turbine control system, converters for wind turbines.Guojie Lu received his BSc degree from North China Electric Power University in 2006. He worked in Beijing Xinhuadu Special Transformer Company from 2007 to 2009, and was responsible for the technical service transformer. At present, he is registered as a postgraduate research student at the Power Electronics and Motor Drivers Engineering Research Center, North China University of Technology, Beijing, China. His research area is wind turbine control system.The project aims to develop maximum power point tracking control algorithm for grid-connected small wind turbines.Peng Wang received his BSc degree from Taiyuan University of Technology in 2003, MSc degree from North China University of Technology in 2011. Since 2008, he has been working as a research assistant in Electrical Engineering at the Power Electronics and Motor Drivers Engineering Research Center, North China University of Technology, Beijing, China. In 2010 he joined the Wind Energy Engineering Research Group at the University of Central Lancashire as a visiting student. His research areas are permanent-magnet synchronous generator control and wind energy engineering.Zhengxi Li received his PhD degree from the University of Science and Technology, Beijing. He is the Chair Professor in Power Electronics and Motor Drivers and Head of the Power Electronics and Motor Drivers Engineering Research Center, North China University of Technology, Beijing, China. He is also Vice President of North China University of Technology. His research interests include power electronics, high voltage power transmission and distribution, intelligent transportation and renewable energy. Xiongwei Liu was born in Xiangtan, China, in 1965. He received his BEng (Hons) degree from National University of Defense Technology, Changsha, in 1985, and his MSc (Distinction) and PhD degrees from Harbin Institute of Technology in 1988 and 1991 respectively.His employment experience included Northwestern Polytechnical University, Huaqiao University, Leeds Met University, University of Hertforshire and University of Central Lancashire. His research interests include wind energy engineering, renewable energy technologies, smart grid and microgrid, and intelligent energy management system.He received a research fellowship from Alexander-von-Humboldt Foundation of Germany, which allowed him to visit Ruhr University Bochum, as a research fellow for 18 months from 1993. In 1999 he was awarded a Bronze Medal by Huo Yingdong Education Funding Council and a Model Worker Medal by the Mayor of Quanzhou, China, due to his excellent contributions in higher education when he served as a professor at Huaqiao University. He received a research fellowship from Chinese Scholarship Council, which allowed him to visit Technical University Berlin as a senior research fellow for 6 months in 2000.Xiongwei Liu is currently working as Chair Professor of Energy and Power Management and Head of Wind Energy Engineering Research Group at the University of Central Lancashire.。
外文翻译译文电池储能加强风力发电机在电力系统集成
电池储能加强风力发电机在电力系统集成Sharad W. Mohod and Mohan V. Aware摘要风力发电，因其在电网的电网穿透率因而正在覆盖到世界各地。
由于其随时间变化的性质和造成稳定性的问题，风力发电是一直波动的，这种弱的互联风在电网的发电来源会直接影响电能质量和它的可靠性，局部能源库应当赔偿波动功率和支持加强电力的风力发电机系统。
在本文中提出了在电流控制模式下电压源逆变器(VSI)蓄能，即通过直流总线的电池。
风力发电测量出风速的变化，并储存在蓄电池中，这个储能直流电压保持在整个刚性总线的电压源逆变器上，所提出来的方案提高了电力系统的可靠性和稳定性和维护单位功率因数，它也可以运行在电力系统的独立模式下，在风力发电的功率交换和动态情况下的负载是可行的，在普通点耦合时能保持规范的电能质量。
它加强了电力系统的薄弱电网部分，在这种控制策略评估动态条件使用测试模拟系统，结果通过比较，验证了控制器的性能。
关键词：Terms-Battery储能；电能质量；风能发电系统。
1.简介在最近几年，风力发电已经作为一种干净的和取之不尽，用之不竭的新能源而备受关注的，风力发电的普及率已经在世界各地持续增加，电力发电可再生能源投资的增长速度也正在世界范围内增加，德国大约有16%的电力来自风能，丹麦也有12%电力来自风能，美国正在计划产生20%的来自风能的电力，印度是全球第五大风能生产国，其在2009年总风电潜力估计为45195兆瓦，装机容量为10925兆瓦。
然而，风电场输出功率是波动的，并且会影响到互联电网。
所以这就需要一些措施来减少输出波动率并保持在网格的电能质量。
已经做了很多评估研究试图减轻风力发电系统的影响，在互联电网系统有一些基于氢，电容器，电池储能和超导磁储能的形成研究。
在日本，电池储能被用于减缓风电场稳定短期波动输出的变化，提出了大量的能量储存为了提供所需设备去管理风电波动，加强风力吸收，实现节省燃料成本，并减少CO2排放的目的。
风力发电外文文献翻译中英文
风力发电外文翻译中英文英文Wind power in China – Dream or reality?HubacekAbstractAfter tremendous growth of wind power generation capacity in recent years, China now has 44.7 GW of wind-derived power. Despite the recent growth rates and promises of a bright future, two important issues - the capability of the grid infrastructure and the availability of backup systems - must be critically discussed and tackled in the medium term.The study shows that only a relatively small share of investment goes towards improving and extending the electricity infrastructure which is a precondition for transmitting clean wind energy to the end users. In addition, the backup systems are either geographically too remote from the potential wind power sites or currently financially infeasible. Finally, the introduction of wind power to the coal-dominated energy production system is not problem-free. Frequent ramp ups and downs of coal-fired plants lead to lower energy efficiency and higher emissions, which are likely to negate some of the emission savings from wind power.The current power system is heavily reliant on independentlyacting but state-owned energy companies optimizing their part of the system, and this is partly incompatible with building a robust system supporting renewable energy technologies. Hence, strategic, top-down co-ordination and incentives to improve the overall electricity infrastructure is recommended.Keywords: Wind power, China, Power grids, Back-up systems1. IntroductionChina 'wsi nd energy industry has experienced a rapid growth over the last decade. Since the promulgation of the first Renewable Energy Law in 2006, the cumulative installed capacity of wind energy amounted to 44.7 GW by the end of 2010 [1]. The newly installed capacity in 2010 reached 18.9 GW which accounted for about 49.5% of new windmills globally. The wind energy potential in China is considerable, though with differing estimates from different sources. According to He et al. [2], the exploitable wind energy potential is 600–1000 GW onshore and 100–200 GW offshore. Without considering the limitations of wind energy such as variable power outputs and seasonal variations, McElroy et al. [3] concluded that if the Chinese government commits to an aggressive low carbon energy future, wind energy is capable of generating 6.96 million GWh of electricity by 2030, which is sufficient to satisfy China ' selectricity demand in 2030.The existing literature of wind energy development in China focuses on several discussion themes. The majority of the studies emphasize the importance of government policy on the promotion of wind energy industry in China [4], [5], [6], [7]. For instance, Lema and Ruby [8] compared the growth of wind generation capacity between 1986 and 2006, and addressed the importance of a coordinated government policy and corresponding incentives. Several studies assessed other issues such as the current status of wind energy development in China [9]; the potential of wind power [10]; the significance of wind turbine manufacturing [11]; wind resource assessment [5]; theapplication of small-scale wind power in rural areas [12]; clean development mechanism in the promotion of wind energy in China [4], social, economic and technical performance of wind turbines [13] etc.There are few studies which assess the challenge of grid infrastructure in the integration of wind power. For instance, Wang [14] studied grid investment, grid security, long-distance transmission and the difficulties of wind power integration at present. Liao et al. [15] criticised the inadequacy of transmission lines in the wind energy development. However, webelieve that there is a need to further investigate these issues since they are critical to the development of wind power in China. Furthermore, wind power is not a stand-alone energy source; it needs to be complemented by other energy sources when wind does not blow. Although the viability and feasibility of the combination of wind power with other power generation technologies have been discussed widely in other countries, none of the papers reviewed the situation in the Chinese context. In this paper, we discuss and clarify two major issues in light of the Chinese wind energy distribution process: 1) the capability of the grid infrastructure to absorb and transmit large amounts of wind powered electricity, especially when these wind farms are built in remote areas; 2) the choices and viability of the backup systems to cope with the fluctuations of wind electricity output.2. Is the existing power grid infrastructure sufficient?Wind power has to be generated at specific locations with sufficient wind speed and other favourable conditions. In China, most of the wind energy potential is located in remote areas with sparse populations and less developed economies. It means that less wind powered electricity would be consumed close to the source. A large amount of electricity has to be transmittedbetween supply and demand centres leading to several problems associated with the integration with the national power grid system, including grid investment, grid safety and grid interconnection.2.1.P ower grid investmentAlthough the two state grid companies-(SGCC) State Grid Corporation of China and (CSG) China Southern Grid - have invested heavily in grid construction, China 'pso wer grid is still insufficient to cope with increasing demand. For example, some coal-fired plants in Jiangsu, which is one of the largest electricity consumers in China, had to drop the load ratio to 60 percent against the international standard of 80 percent due to the limited transmission capacity [16]. This situation is a result of an imbalanced investment between power grid construction and power generation capacity. For example, during the Eighth Five-Year Plan, Ninth Five-Year Plan and Tenth Five-Year Plan,1 power grid investments accounted for 13.7%, 37.3% and 30% of total investment in the electricity sector, respectively. The ratio further increased from 31.1% in 2005 to 45.94% in 2008, the cumulative investment in the power grid is still significantly lower than the investments in power generation [17]. Fig. 1 gives a comparison of the ratios ofaccumulative investments in power grid and power generation in China, the US, Japan, the UK and France since 1978. In most of these countries, more than half of the electric power investment has been made on grid construction. By contrast, the ratio is less than 40% in China.According to the Articles 14 and 21 of the Chinese Renewable Energy Law, the power grid operators are responsible for thegrid connection of renewable energy projects. Subsidies are given subject to the length of the grid extension with standard rates. However, Mo [18] found that the subsidies were only sufficient to compensate for capital investment and corresponding interest but excluding operational and maintenance costs.Again, similar to grid connection, grid reinforcement requires significant amounts of capital investment. The Three Gorges power plant has provided an example of large-scale and long-distance electricity transmission in China. Similar to wind power, hydropower is usually situated in less developed areas. As a result, electricity transmission lines are necessaryt o deliver the electricity to the demand centres where the majority are located; these are the eastern coastal areas and the southern part of China. According to SGCC [19], the gridreinforcement investment of the Three Gorges power plants amounted to 34.4 billion yuan (about 5 billion US dollars). This could be a lot higher in the case of wind power due to a number of reasons. First, the total generating capacity of Three Gorges project is approximately 18.2 GW at this moment and will reach 22.4 GW when fully operating [20], whilst the total generating capacity of the massive wind farms amount to over 100 GW. Hence, more transmission capacities are absolutely necessary. Second, the Three Gorges hydropower plant is located in central China. A number of transmission paths are available, such as the 500 kV DC transmission lines to Shanghai (with a length of 1100 km), Guangzhou (located in Guangdong province, with a length of 1000 km) and Changzhou (located in Jiangsu province, with a length of 1000 km) with a transmission capacity of 3 GW each and the 500 kV AC transmission lines to central China with transmission capacity of 12 GW. By contrast, the majority of wind farm bases, which are located in the northern part of China, are far away from the load centres. For example, Jiuquan located in Gansu has a planned generation capacity of 20 GW. The distances from Jiuquan to the demand centres of the Central China grid and the Eastern China grid are 1500 km and 2500 km, respectively. For Xinjiang, the distances are even longer at 2500 km and 4000 km,respectively. As a result, longer transmission lines are required. Fig. 2 depicts the demand centres and wind farms in detail.2.2.Grid safetyThe second problem is related to grid safety. The large-scale penetration of wind electricity leads to voltage instability, flickers and voltage asymmetry which are likely to cause severe damage to the stability of the power grid [21]. For example, voltage stability is a key issue in the grid impact studies of wind power integration. During the continuous operation of wind turbines, a large amount of reactive power is absorbed, which lead to voltage stability deterioration [22]. Furthermore, the significant changes in power supply from wind might damage the power quality [23]. Hence, additional regulation capacity would be needed. However, in a power system with the majority of its power from base load provider, the requirements cannot be met easily [24]. In addition, the possible expansion of existing transmission lines would be necessary since integration of large-scale wind would cause congestion and other grid safety problems in the existing transmission system. For example, Holttinen [23] summarized the majorimpacts of wind power integration on the power grid at the temporal level (the impacts of power outputs at second, minute to year level on the power grid operation) and the spatial level (the impact on local, regional and national power grid). Besides the impacts mentioned above, the authors highlight other impacts such as distribution efficiency, voltage management and adequacy of power on the integration of wind power [23].One of the grid safety problems caused by wind power is reported by the (SERC) State Electricity Regulatory Commission [25]. In February and April of 2011, three large-scale wind power drop-off accidents in Gansu (twice) and Hebei caused power losses of 840.43 MW, 1006.223 MW and 854 MW, respectively, which accounted for 54.4%, 54.17% and 48.5% of the total wind powered outputs. The massive shutdown of wind turbines resulted in serious operational difficulties as frequency dropped to 49.854 Hz, 49.815 Hz and 49.95 Hz in the corresponding regional power grids.The Chinese Renewable Energy Law requires the power grid operators to coordinate the integration of windmills and accept all of the wind powered electricity. However, the power grid companies have been reluctant to do so due to the above mentioned problems as well as technical and economic reasons. For instance, more than one third of the wind turbines in China, amounting to 4 GW capacity, were not connected to the power grid by the end of 2008 [17]. Given that the national grid in China is exclusively controlled by the power companies – SGCC and CSG - the willingness ofthese companies to integrate wind energy into the electricity generation systems is critical.2.3.T he interconnection of provincial and regional power gridsThe interconnection of trans-regional power grids started at the end of 1980s. A (HVDC) high voltage direct current transmission line was established to link the Gezhouba2 dam with Shanghai which signifies the beginning of regional power grids interconnection. In 2001, two regional power grids, the North China Power Grid and Northeast China Power Grid were interconnected. This was followed by the interconnection of the Central China Power Grid and the North China Power Grid in 2003. In 2005, two other interconnection agreements were made between the South China Power Grid with North, Northeast and Central China Power Grid, and the Northwest China Power Grid and the Central China Power Grid. Finally, in 2009, the interconnection of Central China Power Grid and the East China Power Grid was made. In today ' s China, the Chinesepower transmission systems are composed of 330 kV and 500 kV transmission lines as the backbone and six interconnected regional power grids and one Tibet power grid [26].It seems that the interconnectivity of regional power grids would help the delivery of wind powered outputs from wind-rich regions todemand centres. However, administrative and technical barriers stillexist. First, the interconnectivity among regions is always considered as a backup to contingencies, and could not support the large-scale, long-distance electricity transmission [27]. In addition, the construction of transmission systems is far behind the expansion of wind power. The delivery of large amounts of wind power would be difficult due to limited transmission capacity. Furthermore, the quantity of inter-regional electricity transmission is fixed [27]. Additional wind power in theinter-regional transmission might have to go through complexadministrative procedures and may result in profit reductions of conventional power plants.3. Are the backup systems geographically available and technically feasible?Power system operators maintain the security of power supply by holding power reserve capacities in operation. Although terminologies used in the classification of power reserves vary among countries [28], power reserves are always used to keep the production and generation in balance under a range of circumstances, including power plant outages, uncertain variations in load and fluctuations in power generations (such as wind) [29]. As wind speed varies on all time scales (e.g. from seconds to minutes and from months to years), the integration of fluctuating wind power generation induces additional system balancing requirements on the operational timescale [29].A number of studies have examined the approaches to stabilize the electricity output from wind power plants. For example, Belanger and Gagnon [30] conducted a study on the compensation of wind power fluctuations by using hydropower in Canada. Nema et al. [31] discussed the application of wind combined solar PV power generation systems and concluded that the hybrid energy system was a viable alternative to current power supply systems in remote areas. In China, He et al. [2]investigated the choices of combined power generation systems. The combinations of wind-hydro, wind-diesel, wind-solar and wind-gas power were evaluated respectively. They found that, for instance, the wind-diesel hybrid systems were used at remote areas and isolated islands. This is because the wind-diesel hybrid systems have lower generation efficiency and higher generation costs compared to other generation systems. Currently, the wind-solar hybrid systems are not economically viable for large-scale application; thus, these systems have either been used at remote areas with limited electricity demand (e.g. Gansu Subei and Qinghai Tiansuo) or for lighting in some coastal cities [2]. Liu et al. [32] adopted the EnergyPLAN model to investigate the maximum wind power penetration level in the Chinese power system. The authors derived a conclusion that approximately 26% of national power demand could be supplied by wind power by the end of 2007. However, theauthors fail to explain the provision of power reserves at different time scales due to wind power integration.Because of the smoothing effects of dispersing wind turbines at different locations (as exemplified by Drake and Hubacek [33] for theU.K., Roques [34] for the E.U. and Kempton et al. [35] for the U.S.), the integration of wind power has a very small impact on the primary reserves which are available from seconds to minutes [36]. However, the increased reserve requirements are considerable on secondary reserves (available within 10 –15 min) which mainly consist of hydropower plants and gas turbine power plants [29]. Besides, the long-term reserves, which are used to restore secondary reserves after a major power deficit, will be in operation to keep power production and consumption in balance for a longer timescale (from several minutes to several hours). In the following subsection, we examine the availability of power plants providing secondary and long-term reserves and investigate the viability of energy storage system in China.中文中国的风力发电–梦想还是现实？胡巴切克摘要经过近几年风力发电能力的巨大增长，中国现在拥有 44.7 吉瓦的风力发电。
wind power generation作文及翻译风力发电
wind power generation作文及翻译风力发电In recent years, as a renewable clean energy, wind energy has been paid more and more attention all over the world. In recent years, the world wind power has been taking the wind turbine as the core to develop the key equipment of wind turbine power generation system. In the past few years, the localization of design and manufacturing problems has been the bottleneck of China's wind power generation.With the development of localization of wind power equipment in China The research and design of Zhanhe asynchronous generator has always been an urgent problem to be solved in the power industry. With the support and pro motion of the relevant preferential policies of the state, the rapid development of wind power industry in China has reached. With the expansion of the total installed capacity of wind power in kilowatt scale, due to the contingency a nd randomness of wind power, the impact of wind power on the stability of power grid can not be ignored, so the wind turbine was established The asynchronous model of group variable capacity makes the stability of wind turbine i n the wind power generation system can be analyzed and treated by the method similar to synchronous motor.The asynchronous wind generator is an important model of wind power generation. The simulation of asynchronous generator based on SPS module is of great significance because of its simple structure, lowprice and no strict control and control network equipment It is easier to connect with the power grid, but its speed can be changed to a certain extent, which will be able to absorb the transient process of wind energy. However, Xu Jizhu asynchronous generator grid is exciting and increases the demand for reactive power.Based on the requirements of asynchronous wind turbine control system, according to the actual operation model of wind turbine, and using Matlab/Simulink The simulation results are basically consistent with the actual operation of wind turbines.翻译：近年来，风能作为一种可再生的清洁能源日益受到世界各国的广泛关注，使得近几年世界风电一直以风电机组为核心发展风电机组发电系统的关键设备，在过去的几年里，设计和制造问题的本地化一直是中国风力发电的瓶颈，随着我国风力发电设备国产化工作的开展和异步发电机的研究与设计一直是电力行业迫切需要解决的问题，在国家相关优惠政策的支持和推动下，我国风电事业的快速发展已经达到了随着风电总装机容量千瓦规模的扩大，由于风电的偶然性和随机性，风电对电网稳定性的影响已不容忽视，建立了风电机组变容量异步模型，使风电机组在风力发电系统中的稳定性可以用类似于同步电机来分析处理它们的异步风力发电机是风力发电的一个重要模型，基于SPS模块的异步发电机仿真具有重要意义，因为其结构简单、价格低廉，而且不需要严格的控制和控制网络设备，可以更容易地与电网连接，但其转速可以在一定程度上改变，将能够吸收风能的暂态过程然而，许继柱异步发电机电网令人振奋，增加了电网对无功功率的需求，基于异步风电机组控制系统的要求开发了，根据建立的风力发电机组实际运行模型，并利用MATLAB/SIMULINK对其过程进行了仿真，仿真结果与实际运行的风电机组基本一致。
风力发电机组中英文词汇对照
风力发电机组中英文词汇对照Aa.t.c.system 加工中心机刀库abrasive disc 磨料盘abscissa axis 横坐标absolute encoder 绝对式编码器absolute humidity 绝对湿度ac motor 交流环电动机accelerated test 加速试验accelerating 加速acceleration amplitude 加速度幅值accelerometer 加速度传感器acceptance test 验收试验accumulator 储压罐accuracy 精度acetone 丙酮acknowledgement 确认acoustic reference wind speed 声的基准风速activation power (for wind turbines) 临界功率activation rotational speed 临界转速activation 活动，赋活，激活，活化，激励，启用active (passive) circuit elements 有（无）源电路元件active component 有功分量active current 有功电流active in respect to 相对….呈阻性active power 有功功率active yawing 主动偏航acute angle 锐角addendum modification on gear 齿轮的变位address 地址adhesive 带粘性的，胶粘，粘合剂adjustable spanner 活动扳手adjusting plate 调整板admittance 导纳admixture 混合，混合物adversely 逆地，反对地adze 扁斧aerial航空的，生活在空气中的，空气的，高耸的，天线aerodynamic characteristics of rotor 风轮空气动力特性aerodynamic chord of airfoil 气动弦线aerosol 浮质，气溶胶，气雾剂，烟雾剂ageing tests 老化试验aggregate 合计，总计，集合体aggressively 侵略地，攻势地air braking system 空气制动系统air gap 气隙air header 集气管air humidity 空气湿度air inlet 通风口air permeability 透气性air set 空气中凝固，常温自硬自然硬化air-cushion 空气垫airfoil 翼型air-gap flux distribution 气隙磁通分布air-gap flux 气隙磁通air-gap line 气隙磁化线air-termination system 接闪器alarm 报警algebraic 代数的algorithmic 算法的align 对准，校直alignment 对准，定位调整alkali-sensitive 碱性感测allen key 六方allen wrench 六方扳手alloy 合金alloy 合金alteration变更，改造alternating current machine 交流电机alternating current 交流电流alternating voltage 交流电压altitude 海拔aluminum continuous melting & holding furnaces 连续溶解保温炉ambient temperature 环境温度ammeter电流表ampere-turns 安匝(数)amplidyne 微场扩流发电机amplifier panel 放大器盘amplifier 放大器amplitude modulation(am 调幅amplitude 幅值anaerobic没有空气而能生活的，厌氧性的analog input terminals 模拟量输入端子analog signal 模拟信号analogue board 模拟盘analogue control 模拟控制analyzer分析器anchor bolt 地脚螺栓anchor bolt 锚定螺栓anchor 锚，抛锚，锚定anemometer 风速计aneroid barometer无液气压表，无液晴雨angle grinder角锉angle of attack of blade 叶片几何攻角angle of rotor shaft 风轮仰角angle plate角盘annealing 退火annual average wind speed 年平均风速annual average 年平均annual energy production 年发电量annual extreme daily mean of temperature 年最高日平均温度annual maximum 年最高annual variation 年变化annulus环面anode阳极，正极anodization 阳极氧化antenna 天线；触角antifriction减低或防止磨擦之物，润滑剂anvil铁砧apparent sound power level 视在声功率级application drawing操作图，应用图approximate近似，接近，约计arbor 树阴；凉亭；藤架arc control device 灭弧装置arc cutting电弧切割arc gouging 电弧刨削arc welding 电弧焊arc welding 电弧焊arc 弧，弓形，拱，电弧Archimedean screw阿基米德螺线armature circuit 电枢电路armature coil 电枢线圈Armature m.m.f. wave 电枢磁势波armature 电枢articulated接合，链接，有关节的aspect ratio 叶片展弦比assemble集合，聚集，装配assembly 装配assorted files分类排列；相匹配(文件) assume假定，设想，采取，呈现asynchronous generator 异步电机attenuate 衰减attenuation变薄，稀薄化，变细，衰减audit 审计auger打孔钻，螺丝钻auto transformer 自耦变压器automatic station 无人值守电站automatic temperature recorder 温度自动记录器automatic voltage regulator(avr) 自动电压调整器auxiliary circuit 辅助电路auxiliary device 辅助装置auxiliary motor 辅助电动机auxiliary switch辅助接点availability 可利用率（风力发电机组）average noise level 平均噪声average 平均，平均水平，平均数，海损，一般的，通常的aviation light 航空灯awl 锥子axe斧，(经费的)大削减axial pitch 轴向齿距axle 轮轴，车轴Bback saw背锯back-feed反馈backlash反冲，无效行程；间隙，偏移；退balancing equipment 平衡设备ball bearing滚珠轴ball saddle滚珠支撑ball-eye 球头挂环ball-hook 球头挂钩ball-peen hammer 圆头锤band saw 带锯bandwidth 带宽band区；带，波段带子，镶边，波段，队，乐队. 联合，结合bar magnet磁条barometer气压计base material基底材料base 基极basic error 基准误差battery power drill电池钻baud rate波特率baud 波特bayonet 卡口beach海滨；湖滨；河滩bead 珠子，水珠beam compass长臂圆规beam idler gear 惰轮齿beam trammel骨架bearer 支架，托架，支座，载体bearing fittings 轴承配件bearing processing equipment 轴承加工机bearings 轴承bell crank曲柄bellow type 波纹管式belt drive 带传动belting制带的材料，带类，调带装置bend 弯管弯头bending machines 弯曲机bending 挠曲Bessemer converter 酸性转炉，贝塞麦转炉Bessemer酸性转炉钢bevel gear斜角；斜齿轮bevel-edge steel 斜缘薄钢板beveling 磨斜棱，磨斜边biconcave lens两面凹镜biconvex lens两面凸镜bifurcated rivet 开口铆钉；分叉的铆钉bilateral circuit 双向电路bimetallic双金属的bimotored 双马达的bin二进制biphase 双相的bipolar junction transistor (bjt) 双极性晶体管bit 位；比特black body 黑体blade for iron saw 剧刃blade losses 叶片损失blade 叶片blades 刀片blades，saw 锯片blast cleaning皮老虎blast furnace鼓风炉blast 强风bleed 放出(液体，气体等)；漏出，漏入，泄漏，色料扩散bleeder valve 溢流阀blinding plate盲板blind挡板block and tackle滑轮组block diagram 方框图block diagram框图blocking(for wind turbines) 锁定（风力机）blowhole气泡，气孔blowlamp喷灯blowpipe吹风管blowtorch 吹管，喷灯board 底板，板boiler锅炉；煮器；烧水器bolt 螺栓bolts,screws & nuts 螺栓，螺帽及螺丝bolt螺栓，螺钉，支持，维持bonding bar 等电位连接带bonding conductor 等电位连接导体bonding wire 接合线，焊线bone 骨剔除bonnet软帽，汽车发动机罩boost 增压boost-buck 升压去磁bore钻孔，钻boring heads 搪孔头boring machines 镗床both sides welding.双面焊接bottom dead-centre 下死点；下顶点bow-spring compass 弓形片弹簧圆规box spanner inset 插入式套筒扳手box spanner管钳子brace 支柱，带子，振作精神bracket托架，括弧，支架brad 曲头钉bradawl小锥brake fluid 刹车油brake disc 刹车盘brake lining 闸衬片brake mechanism 制动机构brake pad 闸垫brake setting 制动器闭合brake setting 制动器闭合brake shoe 闸轨brake(for wind turbines) 制动器braking mechanism 制动机构braking releasing 制动器释放braking system 制动系统branch connection 分支接续branch of joint连接分支brass黄铜，黄铜制品，brazing铜焊breakaway force 起步阻力breakaway starting current of an a.c. 交流电动机的最初启动电流breakdown torque 极限转矩breakdown 击穿breaker 断路器breast drill 胸压手摇钻breather 呼吸者，喘息者，剧烈的运动bricklayer's hammer 砖匠锤bridges 管式桥bronze 青铜brush wastage 碳刷磨损bubble 磁泡，水泡，气泡buck 补偿bucket桶，一桶的量，铲斗buffing wheel 抛光轮，弹性磨轮bulkhead隔壁，防水壁bulk 大小，体积，大批，大多数，散装bulldozer 推土机Bunsen burner 本生灯burn through 烧蚀burr 芒刺；刺果植物；针球bursting disc 防爆膜bursting 突然破裂，爆发，脉冲bus bar separator 母线间隙垫bus bar support 硬母线固定金？bus bar 母线bus coupler 总线耦合器bus duct 母线槽bus-bar expansion joint 母线伸缩节bush 矮树丛，(机械)衬套bushing轴衬，套管butt weld 对接焊缝butt welding 对接焊byte 字节Ccabinet converter 变频器柜cabinet door 柜门cabinet nacelle transformer 机舱变压器柜cabinet nacelle 机舱机柜cabinet tower 塔基机柜cable armor电缆铠装cable bundle 束，光纤束；捆，卷cable cutter 电缆剪cable fitting电缆配件cable gland 电缆衬垫cable gland 电缆衬垫cable glands 电缆衬垫cable making tools 造线机cable reel 电缆盘cable routing电缆路由选择cable shear 电缆剪cable sheath电缆包皮层cable shoes电缆靴cable tie 电缆带cable tie电缆带cable tray 电缆盘cable trunk 电缆管道cable twist 扭缆cage 笼型calculation sheet计算书calibration标度，刻度，校准caliper测径器，卡钳，弯脚器calorimeter热量计camber 拱形camshaft凸轮轴cam凸轮cancel 取消，删去cantilever伸臂，悬臂；悬臂梁capacitance effect 电容效应capacitance 电容capacitor for voltage protection 保护电容器capacitor 电容器capacity 容量capping ends顶盖末端capstan lathe绞盘车床carbon-filament lamp 碳丝灯泡carburettor 汽化器cardan shaft万向轴carrier 载波cartesian coordinates 笛卡儿坐标系cartridge额盒式磁盘[带](机)；夹头cast-aluminum rotor 铸铝转子castellated coupling 牙嵌式联接casting 铸件，铸造casting, aluminium 铸铝casting, copper 铸铜casting, gray iron 铸灰口铁casting, malleable iron 可锻铸铁casting, other 其他铸造casting, steel 铸钢castle nut城堡螺母cast 投；掷；抛catalyst 催化剂，触媒catastrophic failure(for wind turbines) 严重故障cathode 阴极cathode-ray tube阴极射线管cathodic protection system 阴极保护系统catwalk桥上人行道，狭小通道caulking metal填隙合金[金属](材料) caulking 填…以防漏caution小心ccw 逆时针cement lined piping 水泥衬里cement 水泥，接合剂，接合，用水泥涂，巩固，粘牢center distance 中心距center gear 中心轮center puncher中心冲centralized control 集中控制centre bit中心位centrifugal unit 离心单元centrifugal 离心ceramics 陶瓷；陶瓷技术chain drive 链传动chain making tools 造链机chain vice 链式钳chain wheel 滑轮chain-grate stoker 链条炉排加煤机chamfer machines 倒角机change over switching 换接change over 改变成，对调位channel bases沟渠基底characteristic 特性characteristic curves 特性曲线charge 充电chaser猎人，驱逐舰check against 检查，核对check valve止回阀cheese 干酪，垫砖cheese-head screw 有槽凸圆柱头螺钉chemical corrosion 化学腐蚀chipping 修琢chisel 凿子砍凿chloride 氯化物，漂白粉choke valve 阻气阀choke 窒息，阻气门chopper circuit 斩波电路chord 弦，和音，情绪chrome 铬；铬矿石；氧化铬chronometer 精密计时表chuck 轻拍，抛掷，驱逐，丢弃，用卡盘夹住chucks 夹盘circlip 环形，弹性挡圈circuit branch 支路circuit breaker保护断路器circuit breaker断路开关circuit components 电路元件circuit diagram 电路图circuit diagram 电路图circuit parameters 电路参数circular saw圆锯circular圆形，环；循环circulate 循环；流通circulating循环circumference周线；外围；周围circumferential backlash 圆周侧隙circumferential joint 周圈接缝civil engineer 土木工程师civil works土建工程，建筑工程clamp ammeter钳形表clamp 夹钳clamping/holding systems 夹具/支持系统clamp夹子，夹具，夹钳claw hammer 拔钉锤clearance 排除故障，清除clevis drawbar 牵引环，联结钩clevis joint 拖钩，脚架接头clevis ｕ形夹climate 气候close grain 结晶粒closed circuit 闭合电路clout nail大帽钉club hammer锤子，榔头clutch离合器，联轴器cnc bending presses 电脑数控弯折机cnc boring machines 电脑数控镗床cnc drilling machines 电脑数控钻床cnc edm wire-cutting machines 电脑数控电火花线切削机cnc electric discharge machines 电脑数控电火花机cnc engraving machines 电脑数控雕刻机cnc grinding machines 电脑数控磨床cnc lathes 电脑数控车床cnc machine tool fittings 电脑数控机床配件cnc milling machines 电脑数控铣床cnc shearing machines 电脑数控剪切机cnc toolings cnc 刀杆cnc wire-cutting machines 电脑数控线切削机coarse粗(糙，略)，近似coaxial cable同轴电缆coaxial 共轴的，同轴的cobalt钴(符号为co)，钴类颜料，由钴制的深蓝色code 代码coefficient of torsional rigidity 扭转刚度系数coil 线圈coil spring弹圈coil winding 线圈绕组coincide in phase with 与….同相collar bolt凸缘螺栓collar 凸缘；圈，环，套环，轴；卡圈；安装环collector ring 集电环collector 集电极color identification 彩色识别combination pliers 台钳combination 结合，联合，合并，化合，化合物combustion chamber 燃烧室command 命令commencement 开始commissioning test 投运试验common earthing system 共用接地系统commutation condition 换向状况commutation 换向commutator segment 换向片commutator 换向器commutator-brush combination 换向器-电刷总线complex impedance 复数阻抗complex number 复数complex terrain 复杂地形带compound generator 复励发电机compound 混合物，[化]化合物复合的，混合，配合compounded 复励compressor 压缩物，压缩机，收缩机concave lens 凹面镜concave-convex lens 凸凹镜concrete drill 混凝土钻concrete 混凝土；具体condensation 冷凝condenser 冷凝器；凝结器，电容器conductance 电导conductivity 导电性conductor clamp 卡线钳conductor holder 夹线器conductor 导体conductor 导体conduit box [电]导管分线匣conduit entry 导管引入装置conduit outlet 电线引出口conduit 管道，导管，沟渠，泉水，喷泉cone数、物]锥形物，圆锥体，(松树的)球果，使成锥形conical 圆锥的，圆锥形的conjunction联合，关联，连接词connecting rod连接杆connection 联结connector 接线器considerably 相当地consistency连结，结合，坚固性，浓度，密度，一致性，连贯性console 安慰，藉慰，控制台console 控制台constant chord blade 等截面叶片construction work 施工工程contact 触头contactor 接触器container箱；罐；容器，集装箱，货柜contaminate 污染，弄污continental climate 大陆性气候continuous operation 持续运行contrast使与…对比，使与…对照，和…形成对照，对比，对照，(对照中的) control apparatus 控制电器control cabinet 控制柜control cable 控制电缆操纵索control circuit 控制电路control console 控制台control desk 控制台control device 控制装置control gear 控制设备control panel 控制面板control system(for wind turbine) 控制系统control valve actuator 阀控传动机构control valve 控制阀，control wiring 控制线路control 控制器controller 控制器convection传送；运流；对流convenience receptacle 电源插座converter 变流器convex lens 凸透镜conveying chains 输送链coolers 冷却机cooling 冷却；冷却技术core sand 型芯沙correspond 符合，协调，通信，相当，相应corridor 通路corrosion of metals 金属腐蚀corrosion resistance tests 耐腐试验corrosion 腐蚀corrosion腐蚀，浸蚀cost per kilowatt hour of the electricity generated by wtgs 度电成本cotter pin 开口销counted measured ，metered measured ，metered reading 计量值counter input 脉冲量输入counter weight 重锤countersink bit装定位countersink埋头孔，暗钉眼counting计算coupling bolt 联结，接合，耦合，耦合性，耦合技术coupling capacitor 结合电容coupling 联轴器coupling 联轴器coverage 覆盖；敷层；有效区域crack 裂纹，裂缝cramp 钳位(电路)；压[夹板]；卡子，夹(子)；压[夹]紧crane 吊车crankcase曲柄轴箱crankshaft曲轴；机轴crank不稳定的，摇晃的，曲柄crate 柳条箱crimping tools 卷边工具criterion 标准，判据，准则critical damping 临界阻尼cross mark 十字标记cross slotted screw 十字长孔crosshead 小标题，子题，[机]十字头，丁字头cross-peen hammer 横头锤cross-section 横断面；横切面；截面crosswise 斜地，成十字状地，交叉地crowbar 撬棍；铁棍；起货钩crown wheel 顶圈crucible 坩锅，严酷的考验cubicle 室，箱cumulatively compounded motor 积复励电动机cupola furnace 园顶熔炉current ration 电流定值current 电流curvature function of airfoil 弯度函数customs 进口税，海关cut in wind speed 切入风速cut out wind speed 切出风速cutters 刀具cutter刀具，切割机cutting disk 切割盘cutting opening 切孔cutting 切割cutting-off machines 切断机cw 顺时针cylinder block 缸体cylinder head 缸头cylinder-head gasket 缸头垫片，垫圈；接合垫cylindrical gear 圆柱齿轮cylindrical 圆柱形，圆柱体；柱面Ddaily mean 日平均值dampen使潮湿，使沮丧damper 防振锤damping coefficient 阻尼系数damping ratio 阻尼比damping 阻尼data base 数据库data circuit 数据电路data terminal equipment 数据终端电路date set(for power performance measurement) 数据组（测试功率特性）dc generator 直流发电机dc motor 直流电动机de machine 直流电机deactivate释放；去激励；停用；退出工作；使无效debris碎片，残骸decimal 十进的，小数的，小数decode 译码defective有缺陷的，欠缺的deflect (使)偏斜，(使)偏转deflection偏向；偏斜；转向deformation 变形，形变；畸变，失真degrease脱脂，除油污degree Celsius摄氏度degree of curvature 弯度delta connection 三角形联结demodulator 解调器deploy展开，配置deposit 堆积物，沉淀物，存款，押金，保证金，存放物depression 沮丧，消沉，低气压，低压depressurizes 使减压，使降压depress使沮丧，使消沉，压下，压低depth gauge 深度计design limit 设计极限design pressure 设计压力design situation 设计工况detergent 清洁剂，去垢剂deviation 偏差，偏移dew 露dial gauge量规dial micrometer千分尺diameter and radius 直径和半径diamond cutters 钻石刀具dicing saws 晶圆切割机die casting dies 压铸冲模die casting machines 压铸机dielectric test 介质试验dielectric 电介质，绝缘体dies-progressive 连续冲模diestock 螺丝攻differential gear 差速齿轮differential protection 差动保护differentiation 微分diffuser 漫射体；(扬声器)纸盆；扩散器digger 挖掘者挖掘机digital clock 数字钟digital control 数字控制digital input terminal 数字量输入端子digital output terminal 数字量输出端子digitizing tablet 数字面板dilute 冲淡，变淡，变弱，稀释dimensional inspection 尺寸检验diode module 二极管模块direct axis transient time constant 直轴瞬变时间常数direct axis 直轴direct current machine 直流电机direct current 直流电流direct solar radiation 直接太阳辐射direct voltage 直流电压direct-current 直流directivity(for wtgs) 指向性discharge 卸下，放出，清偿(债务)，履行(义务)，解雇，开(炮)，放(枪)，射(箭)，卸货，流注，放电dismantle拆除，拆卸dismount 拆卸，卸下displacement amplitude 位移幅值displacement current 位移电流display lamp 指示灯disposable tool holder bits 舍弃式刀头disposal 处理，处置，布置，安排，配置，支配disposition notice 处罚通知书dissipation 分散，浪费，损耗，耗散，消耗distance constant 距离常数distance ring间隔环distortion 畸变distributing apparatus 配电电器distribution board配电盘，配电屏distributor发行人，分电盘，配电器diurnal variation 日变化dividers 圆规dog clutch 瓜形(式)离合器，齿式离合器dolly 洋娃娃，移动车，台车，，移动摄影车domed nut 圆顶螺母double clamp 双卡头double phase 两相double-helical gear 人字齿轮doubt 不确定；疑惑dowel 木钉，销子，用暗销接合down conductor 引下线down wind 下风向drag coefficient 阻力系数drain tap 排气阀drain 排水管drain 泄油，排水沟，消耗，排水draw bar 绘图刀drawing board 画图板，制图板drawing machines 拔丝机drawing pin 图钉drawing point 绘图点drift 漂移，偏差drill gauge 钻规drill 训练，钻孔，条播，钻头；锥子；钻孔机；钻床；钻driller 钻孔者，钻孔机drilling machine 钻床drilling machines bench 钻床工作台drilling machines 钻床drilling machines, high-speed 高速钻床drilling machines, multi-spindle 多轴钻床drilling machines, radial 摇臂钻床drilling machines, vertical 立式钻床drills 钻头drip pan油滴盘drive train 传动链driving gear 主动齿轮drop hammer落锤drum brake鼓状刹车drum鼓，鼓声dry type transformer 干式变压器dryness干，干燥duplex transmission 双工传输durability 耐久性duration宽度，持续时间dust protected 防尘dust 灰尘，尘土，尘埃duty ratio 负载比dye penetrant examination 染料渗透试验法dynamic coupling 齿啮式联接dynamic response 动态响应dynamic-state operation 动态运行dynamo 发电机dynamometer 测力计，功率计Ee.m.f = electromotive fore 电动势earth conductor 接地线earth electrode 接地体earth termination system 接地装置earth;ground 地earthed circuit 接地电路earthing reference points 接地基准点earthing switch 接地开关eddy current 涡流effective values 有效值effects of saturation 饱和效应efficiency of wtgs 机组效率efficiency 效率elastic coupling 弹性联接elbow 弯管接头electric arc电弧electric charge 电荷electric circuit 电路electric coupling 耦合器electric current 电流electric discharge machines(edm) 电火花机electric energy transducer 电能转换器electric energy 电能electric heat tracing.电伴随加热electric machine 电机electric power tools 电动刀具electric shock 触电；电击electric wire and cable 电线电缆electric 电的electrical contact 电触头electrical device 电气设备electrical device 电气元件electrical discharge 放电electrical endurance 电气寿命electrical material电气材料electrical panel 配电板，配电盘electrical rotating machine 旋转电机electricity 电electrode 电焊条electrode 电极electrode 电极电焊条electrolysis 电解，电蚀electrolyte电解，电解液electromagnetic braking system 电磁制动系electromagnetic induction 电磁感应electromagnetic torque 电磁转矩electroplating 电镀，电镀术electrostatics 静电学eliminate消除，删去，排除；切断embedded pc 嵌入式pcemergency braking system 紧急制动系统emergency shutdown 紧急关机emergency stop push button 紧急停车按钮emergency-stop 紧急停止emery cloth砂布，金刚砂布emery wheel 金刚砂旋转磨石，砂轮emery 金刚砂，刚玉砂emitter 发射管放射器发射极encode 编码end ring 端环endplate终板endurance test 耐久性试验endwise 末端朝前或向上的，向前的energizing 使活跃，给予精力，加强，给与…电压energy converter 电能转换器engagement mesh 啮合engraving machines 雕刻机engraving machines, laser 激光雕刻机environment condition 环境条件environment 环境epicyclical gear计数齿epoch angle 初相角epoxy 环氧树脂epoxy-glued环氧胶equilateral triangle 等边三角形equipment failure information 设备故障信息equipotential bonding 等电位连接equivalent t circuit t型等值电路erection 架设erection直立，竖起，建筑物error codes 故障代码error detector 误差检测器error signal 误差信号etching machines 蚀刻机ethercat extension扩展端子event information 事件信息examination试验excitation response 励磁excitation response 励磁响应excitation system 励磁系统excitation励磁excited by 励磁exciter 励磁机exciting voltage 励磁电压exfoliation剥落exhaust pipe 排气管exhaust valve排气阀expanded metal膨胀金属expander扩展器，扩展电路，扩大器expansion bolt 伸缩栓，扩开螺栓expansion bolt伸缩栓，扩开螺栓expansion bolt自攻螺丝expansion joint 伸缩接头expansion joint 伸缩接头explanatory quad填充铅块extension tube伸缩管external armature circuit 电枢外电路external calipers 外卡钳external characteristic 外特性external conditions(for wind turbines) 外部条件（风力机）external conditions(for wtgs) 外部条件external gear 外齿轮external lightning protection system 外部放雷系统external power supply 外部动力源extern外(面)的，外来的extrapolated power curve 外推功率曲线extreme 极端extreme maximum 极端最高extreme wind speed 极端风速extrusion 挤压，挤压成形eye bolt 吊耳eye screw螺丝眼Ffabrication drawing 制造图纸，制作图fabrication tolerance 制造容差fabrication 加工，制造fabrication 制造；生产；结构fabrication.制造face width 齿宽faceplate面板，花盘facilitate使容易，使便利，推动，帮助，使容易，促进fag bolt，疲劳螺栓fail safe 安全性failure 失效fake假货，欺骗，伪造，赝造，捏造，假造，仿造fan belt风扇皮带fan heater 风扇加热器fault earthing 故障接地fault 故障feather position 顺桨位置feathering 顺浆feedback component 反馈元件feedback loop 反馈回路feedback signal 反馈信号feedback system 反馈系统feeder 馈电线feeler gauge触规felling axe外轮轴ferritic 铁素体的fetch 接来，取来，带来，售得，引出，吸引，到达，演绎出fidelity 保真度field coils 励磁线圈field current 励磁电流field data 现场数据field effect transistor (fet) 场效应管field fabricated 工地制造的，现场装配的field installation 现场安装field instrument 携带式仪表field reliability test 现场可靠性试验field test with turbine 外联机试验field winding 磁场绕组励磁绕组filament灯丝；细丝filler metal 焊料，焊丝filler rod焊条fillet weld 角焊，填角焊film density 影片密度film viewer底片观察用光源filter 过滤器finishing machines 修整机fire barriers防火间隔fire extinguisher灭火器firebrick 耐火砖fireman's axe消防斧firmer chisel 凿子fixing 固定fixture 夹具flange connection.凸缘联接flange coupling凸缘联轴器flange gasket 法兰垫片flange joint 凸缘接头flange 边缘，轮缘，凸缘，法兰flange 凸缘flanged nut凸缘螺母flanged union凸缘连接flank侧面，军队侧翼，侧腹flash plate闪熔镀层flash welding 闪光焊flashlight手电筒，闪光灯flashover 闪络flashpoint闪点flat nut平螺母flat 平坦的，扁平的，单调的，倒下的，浅的flat-head rivet平头铆钉flaw裂缝，缺陷，疵瑕flexible conduit软管flexible gear 柔性齿轮flexible rolling bearing 柔性滚动轴承flexural rigidity 抗挠刚度flexure 弯曲，挠曲flex弯曲(四肢)，伸缩，折曲flicker coefficient for continuous operation 持续运行的闪变系数flicker step factor 闪变阶跃系数flicker 闪变float chamber浮子floating 漂浮的，浮动的，移动的，流动的，不固定的flow charts 流程图flow distortion 气流畸变flow instrument 流量计flow instrument流量计flow sheet 流程图flue烟洞，烟道，暖气管，蓬松的东西flushing 冲洗，填缝flush刷新flutter 颤振flux linkage 磁链flux 磁通，通量；焊剂；流动，熔化，流出flux 焊剂fog 雾foot pump脚泵forge炼炉；熔炉forging dies 锻模forging，aluminium 锻铝forging，cold 冷锻forging，copper 铜锻forging，other 其他锻造forging，steel 钢锻fork 派生(指令)，分叉(指令)，分支fork-lift truck 叉架式运货车，铲车formation 构造，结构；形成，建立；形式forming 印版form-wound 模绕forward transfer function 正向传递函数foundation earth electrode 基础接地体foundation 基础，根本，建立，创立，地基foundry equipment 铸造设备foundry铸造，翻砂，铸工厂，玻璃厂，铸造厂four-jaw chuck 四爪卡盘four-stroke 四冲程frame 帧，画面；框架机架，架，机柜free stand tower 独立式塔架free stream wind speed 自由流风速freezing rain 冻雨frequency converter 变频器frequency of wind speed 风速频率frequency shift keying(fsk) 移频键控frequency 频率frequency 频率fret-saw线剧friction grip摩擦盘friction 摩擦，摩擦力frictional摩擦的，摩擦力的front end processor 前置机frost霜，霜冻，严寒，结霜full load 满载full load 满载full-load torque 满载转矩funnel 漏斗，烟窗furnace炉子，熔炉furnish 供应，提供，装备，布置fuse 溶断器fusion 熔融Ggage glass 液位玻璃管gain 增益gain 增益gale强风，大风galvanizing 通电流于，电镀gang saw 直锯gas burner 煤气灶，煤气火焰gas cutting 气割gas main 煤气总管gas mask防毒面具gas pedal气体，煤气，毒气，汽油，瓦斯gas turbine 燃气涡轮gas well 天然气井gas works煤气厂gaskets垫片，垫圈；接合垫gasket垫片，垫圈；接合垫gasometer 煤气厂，气量计gate pole门极gate valve门阀gauge board样板，模板规准尺gauge board仪表板gauge标准尺，规格，量规，量表，测量gavel 槌gear bearing de 齿轮轴承驱动端gear bearing nde 齿轮轴承非驱动端gear box ratio 齿轮箱变比gear cutting machines 齿轮切削机gear fan 齿轮箱冷却风扇gear lever 变速杆gear motor 齿轮马达gear oil pump hs 齿轮油泵高速gear oil pump ls 齿轮油泵低速gear pair with parallel axes 平行轴齿轮副gear pair 齿轮副gear pump 齿轮泵gear train齿轮系gear water pump 齿轮水泵gear wheel齿轮gear 齿轮gears with addendum modification 变位齿轮gears 齿轮geiger counter盖格计数器gel-coated胶衣generating 发电generator fan external 发电机外部风扇generator fan internal 发电机内部风扇generator voltage 发电机电压generator 发电机geometric chord of airfoil 几何弦长geometrical position 几何位置gimbals 平衡环，平衡架gimlet手钻；螺丝锥girder bridgegirder 梁，钢桁的支架girth weld环形焊缝gland腺，密封管glass cutter玻璃刀glaze釉料，釉面，光滑面，上釉，上光globe valve球形阀gloss paint光滑涂料glossy 平滑的，有光泽的gloss注释；注解；评注，光泽的表面，光彩，欺人的表面，假象，glove手套glue胶，胶水，胶合，粘贴，粘合goggle 眼睛睁视，(复数)风镜，护目镜goggles 护目镜gold leaf金叶goons细打包麻布gouge弧口凿，半圆凿gouging 刨削槽governor 调节器；控制器grab 抢夺，攫取，夺取grader 分类机，分级机grading ring 均压环grain 颗粒，晶粒，粒度；纹理graph 图表，曲线图gravity casting machines 重力铸造机grazing angle 掠射角grease gun注油枪；滑脂枪grease nipple油管grease油膏；润滑油greenhouse effect 温室效应grid 电网grind off 磨掉grinder bench 磨床工作台grinder 磨床grinders，thread 螺纹磨床grinders，tools & cutters 工具磨床grinders，ultrasonic 超声波打磨机grinding disk 磨擦盘grinding machines 磨床grinding machines，centerless 无心磨床grinding machines，cylindrical 外圆磨床grinding machines，universal 万能磨床grinding machine磨床grinding tools 磨削工具grinding wheel 砂轮grinding wheels 磨轮grinding磨的，磨擦的，碾的groove凹槽，惯例，最佳状态grounding conductor 接地导体grout 薄泥浆，水泥浆grouting 灌浆grouting给…灌灰浆，给…涂薄胶泥grub screw自攻螺丝guide bars导向棍guide block导向块guide ring导向绳guide wire 尺度[定距]索，准绳guiding shaft导向轴guillotine闸刀，处斩刑，切(纸) gumming树胶分泌gusset plate角撑板，加固板gust influence 阵风影响gust 阵风guy clip 线卡子guyed tower 拉索式塔架gyroscope 陀螺仪，回旋装置，回转仪，纵舵调整器Hhacksaw可锯金属的弓形锯，钢锯hail 冰雹hairspring细弹簧，游丝half duplex transmission 半双工传输half shaft半轴half-round file半圆锉halfway中途的，部分的，不彻底的，半路地，在中途，在半途hand tools 手工具handling 处理(技术，方法)hanger 吊架hanger吊架hanging顶端对齐，悬挂hard hat 安全帽hard/soft and free expansion sheet making plant 硬(软)板(片)材及自由发泡板机组hardener 固化剂，硬化剂harder硬的，坚固的，(问题，工作等)困难的，艰苦的，猛烈的，确实的hardware platform 硬件平台hardware 硬件harmonic 谐波的harmonics 谐波harness导线，装备；利用harrow 耙hatch，舱口，舱口盖，开口，孵，孵出，策划，图谋hatchet 短柄斧hazard 冒险(性)；相关危险；事故，故障head screw 主轴螺杆headstock主轴箱heat preserving furnaces 保温炉heater 加热器heating appliance 电热器heating boxes加热室heating treatment funaces 熔热处理炉helical gear; single-helical gear 斜齿圆柱齿轮helical gearing 螺旋齿helix 螺旋，螺旋状物hemp 大麻，纤维hereafter 今后，从此以后Herringbone gear 人字（齿）轮，双螺旋齿轮hexagon screw die 六角板牙，六角螺丝钢板hexagon spanner六方hexagonal nut六角螺母high frequency generator 高频发电机high voltage高压high-gain 高增益high-performance 高性能的hightensile 高强度high-tension cable高压电缆hissing发嘶嘶声，蔑视hob滚刀，铁架hoe 锄头，用锄耕地，锄hoist升起；吊起；推起，起重机，(台、架等)支持物，固定器hollow空的，中空的honing machines 搪磨机hook bolt吊耳hook spanner 钩，弯脚扳手hook 挂钩hook's joint 钩结合，钩（连）接hopper 单足跳者horizontal axis wind turbine 水平轴风力机horizontal line 水平线horizontal地平线的，水平的horsepower 马力horseshoe magnet 马蹄形磁铁horseshoe magnet马蹄形磁铁hose clip管夹hose 软管，胶皮管，蛇管hot-dip热沾hottest 热的，热烈的housing住房，房屋，护盖，框架hovercraft 水翼船hub height 轮毂高度hub rigidity轮毂刚度hub 轮毂hubcap 轮毂罩hull外壳，船体humidity湿气，潮湿，湿度hydraulic block液压块hydraulic braking system 液压制动系统hydraulic components 液压元件hydraulic cylinder 液压缸hydraulic filter 液压过滤器hydraulic fluid 液压油hydraulic motor 液压马达hydraulic power tools 液压工具hydraulic power units 液压动力元件hydraulic pump 液压泵hydraulic ram液压活塞hydraulic rotary cylinders 液压回转缸hydraulic system 液压系统hydraulic水压的；液压的hydropower station 水电站hydrostatic pressure test静水压试验hydrostatic test 流体静力学试验，水压试验hygrographs 自动湿度记录计hygrometer湿度计hysteresis 滞后作用，[物]磁滞现象Iice sensor 结冰传感器ideal source 理想电源identification mark 识别标志idler pulley惰轮，空转轮，导轮idling(for wind turbines) 空转（风力机）imaginary part 虚部impedance voltage 阻抗电压impedance 阻抗impedance 阻抗impeller 推进者，叶轮imperfection 缺陷impinge 撞击，冲击imprint 印记imprison监禁，关押impulse load tests 冲击动荷试验impulse推动，刺激，冲动，推动力，脉冲impurity杂质，混杂物，不洁，不纯incident 入射的inclusion 杂质incremental encoder 增量式编码器incremental outputs 增量式输出indoor climate 室内气候induced current 感生电流inductance 电感induction coil电感线圈induction generator 感应电机induction generator 感应发电机induction machine 感应电机induction machine 感应电机induction machine 感应式电机induction motor 感应电动机inductive component 感性（无功）分量inductive 诱导的，感应的inductor 电感器inertia switch惯性开关inertial sub range 湍流惯性负区infinite voltage gain 无穷大电压增益inflammable易燃的，易怒的influence by the tower shadow 塔影响效应influence by the wind shear 风切变影响information 信息ingot 条，块，锭initial 最初的，词首的，初始的initialize 初始化initials 缩写injector 注射器injure 损害，伤害inlet valve入口阀inlet 进口，入口inner 内部的，里面的，内心的，内部inoperative不起作用的；无效的input 输入input power 输入功率input shaft 输入轴inrush current 涌流inspection earthing 检修接地inspection 审查，检查instance 例图；事[实，范]例，样品，实例，建议，要求，情况，场合instantaneous electric power 瞬时电功率instantaneous measured 瞬时侧值instantaneous mechanical power 瞬时机械功率instantaneous power 瞬时功率instantaneous value 瞬时值instantaneous瞬间的，即刻的，即时的，瞬时，立即instrument air仪表气源instrument rack 计测器支架instrument rack 计测器支架，计测器框架insufficient不充足的，不适合的，不能胜任的insulant 绝缘物insulated sleeve绝缘套管insulating boots 绝缘靴insulating bushing 绝缘套管insulating glove 绝缘手套insulation level 绝缘比insulation resistance 绝缘电阻insulation 绝缘insulation 绝缘insulator 绝缘子integrated coupling 固定联接integrated，total integrated value 累计值integration 积分下限intensifying screen 增光屏，光增强屏interconnection(for wtgs) 互连（风力发电机组）interface 接口。
风力发电外文文献翻译中英文
风力发电外文翻译中英文英文Wind power in China – Dream or reality?HubacekAbstractAfter tremendous growth of wind power generation capacity in recent years, China now has 44.7 GW of wind-derived power. Despite the recent growth rates and promises of a bright future, two important issues - the capability of the grid infrastructure and the availability of backup systems - must be critically discussed and tackled in the medium term.The study shows that only a relatively small share of investment goes towards improving and extending the electricity infrastructure which is a precondition for transmitting clean wind energy to the end users. In addition, the backup systems are either geographically too remote from the potential wind power sites or currently financially infeasible. Finally, the introduction of wind power to the coal-dominated energy production system is not problem-free. Frequent ramp ups and downs of coal-fired plants lead to lower energy efficiency and higher emissions, which are likely to negate some of the emission savings from wind power.The current power system is heavily reliant on independently acting but state-owned energy companies optimizing their part of the system, and this is partly incompatible with building a robust system supportingrenewable energy technologies. Hence, strategic, top-down co-ordination and incentives to improve the overall electricity infrastructure is recommended.Keywords: Wind power, China, Power grids, Back-up systems1. IntroductionChina’s wind energy industry has exper ienced a rapid growth over the last decade. Since the promulgation of the first Renewable Energy Law in 2006, the cumulative installed capacity of wind energy amounted to 44.7 GW by the end of 2010 [1]. The newly installed capacity in 2010 reached 18.9 GW which accounted for about 49.5% of new windmills globally. The wind energy potential in China is considerable, though with differing estimates from different sources. According to He et al. [2], the exploitable wind energy potential is 600–1000 GW onshore and 100–200 GW offshore. Without considering the limitations of wind energy such as variable power outputs and seasonal variations, McElroy et al. [3] concluded that if the Chinese government commits to an aggressive low carbon energy future, wind energy is capable of generating 6.96 million GWh of electricity by 2030, which is sufficient to satisfy China’s electricity demand in 2030.The existing literature of wind energy development in China focuses on several discussion themes. The majority of the studies emphasize the importance of government policy on the promotion of wind energyindustry in China [4], [5], [6], [7]. For instance, Lema and Ruby [8] compared the growth of wind generation capacity between 1986 and 2006, and addressed the importance of a coordinated government policy and corresponding incentives. Several studies assessed other issues such as the current status of wind energy development in China [9]; the potential of wind power [10]; the significance of wind turbine manufacturing [11]; wind resource assessment [5]; the application of small-scale wind power in rural areas [12]; clean development mechanism in the promotion of wind energy in China [4], social, economic and technical performance of wind turbines [13] etc.There are few studies which assess the challenge of grid infrastructure in the integration of wind power. For instance, Wang [14] studied grid investment, grid security, long-distance transmission and the difficulties of wind power integration at present. Liao et al. [15] criticised the inadequacy of transmission lines in the wind energy development. However, we believe that there is a need to further investigate these issues since they are critical to the development of wind power in China. Furthermore, wind power is not a stand-alone energy source; it needs to be complemented by other energy sources when wind does not blow. Although the viability and feasibility of the combination of wind power with other power generation technologies have been discussed widely in other countries, none of the papers reviewed thesituation in the Chinese context. In this paper, we discuss and clarify two major issues in light of the Chinese wind energy distribution process: 1) the capability of the grid infrastructure to absorb and transmit large amounts of wind powered electricity, especially when these wind farms are built in remote areas; 2) the choices and viability of the backup systems to cope with the fluctuations of wind electricity output.2. Is the existing power grid infrastructure sufficient?Wind power has to be generated at specific locations with sufficient wind speed and other favourable conditions. In China, most of the wind energy potential is located in remote areas with sparse populations and less developed economies. It means that less wind powered electricity would be consumed close to the source. A large amount of electricity has to be transmitted between supply and demand centres leading to several problems associated with the integration with the national power grid system, including grid investment, grid safety and grid interconnection.2.1. Power grid investmentAlthough the two state grid companies-(SGCC) State Grid Corporation of China and (CSG) China Southern Grid - have invested heavily in grid construction, China’s powe r grid is still insufficient to cope with increasing demand. For example, some coal-fired plants in Jiangsu, which is one of the largest electricity consumers in China, had to drop the load ratio to 60 percent against the international standard of 80percent due to the limited transmission capacity [16]. This situation is a result of an imbalanced investment between power grid construction and power generation capacity. For example, during the Eighth Five-Year Plan, Ninth Five-Year Plan and Tenth Five-Year Plan,1 power grid investments accounted for 13.7%, 37.3% and 30% of total investment in the electricity sector, respectively. The ratio further increased from 31.1% in 2005 to 45.94% in 2008, the cumulative investment in the power grid is still significantly lower than the investments in power generation [17]. Fig. 1 gives a comparison of the ratios of accumulative investments in power grid and power generation in China, the US, Japan, the UK and France since 1978. In most of these countries, more than half of the electric power investment has been made on grid construction. By contrast, the ratio is less than 40% in China.According to the Articles 14 and 21 of the Chinese Renewable Energy Law, the power grid operators are responsible for the grid connection of renewable energy projects. Subsidies are given subject to the length of the grid extension with standard rates. However, Mo [18] found that the subsidies were only sufficient to compensate for capital investment and corresponding interest but excluding operational and maintenance costs.Again, similar to grid connection, grid reinforcement requires significant amounts of capital investment. The Three Gorges power planthas provided an example of large-scale and long-distance electricity transmission in China. Similar to wind power, hydropower is usually situated in less developed areas. As a result, electricity transmission lines are necessary to deliver the electricity to the demand centres where the majority are located; these are the eastern coastal areas and the southern part of China. According to SGCC [19], the grid reinforcement investment of the Three Gorges power plants amounted to 34.4 billion yuan (about 5 billion US dollars). This could be a lot higher in the case of wind power due to a number of reasons. First, the total generating capacity of Three Gorges project is approximately 18.2 GW at this moment and will reach 22.4 GW when fully operating [20], whilst the total generating capacity of the massive wind farms amount to over 100 GW. Hence, more transmission capacities are absolutely necessary. Second, the Three Gorges hydropower plant is located in central China. A number of transmission paths are available, such as the 500 kV DC transmission lines to Shanghai (with a length of 1100 km), Guangzhou (located in Guangdong province, with a length of 1000 km) and Changzhou (located in Jiangsu province, with a length of 1000 km) with a transmission capacity of 3 GW each and the 500 kV AC transmission lines to central China with transmission capacity of 12 GW. By contrast, the majority of wind farm bases, which are located in the northern part of China, are far away from the load centres. For example, Jiuquan locatedin Gansu has a planned generation capacity of 20 GW. The distances from Jiuquan to the demand centres of the Central China grid and the Eastern China grid are 1500 km and 2500 km, respectively. For Xinjiang, the distances are even longer at 2500 km and 4000 km, respectively. As a result, longer transmission lines are required. Fig. 2 depicts the demand centres and wind farms in detail.2.2. Grid safetyThe second problem is related to grid safety. The large-scale penetration of wind electricity leads to voltage instability, flickers and voltage asymmetry which are likely to cause severe damage to the stability of the power grid [21]. For example, voltage stability is a key issue in the grid impact studies of wind power integration. During the continuous operation of wind turbines, a large amount of reactive power is absorbed, which lead to voltage stability deterioration [22]. Furthermore, the significant changes in power supply from wind might damage the power quality [23]. Hence, additional regulation capacity would be needed. However, in a power system with the majority of its power from base load provider, the requirements cannot be met easily [24]. In addition, the possible expansion of existing transmission lines would be necessary since integration of large-scale wind would cause congestion and other grid safety problems in the existing transmission system. For example, Holttinen [23] summarized the majorimpacts of wind power integration on the power grid at the temporal level (the impacts of power outputs at second, minute to year level on the power grid operation) and the spatial level (the impact on local, regional and national power grid). Besides the impacts mentioned above, the authors highlight other impacts such as distribution efficiency, voltage management and adequacy of power on the integration of wind power [23].One of the grid safety problems caused by wind power is reported by the (SERC) State Electricity Regulatory Commission [25]. In February and April of 2011, three large-scale wind power drop-off accidents in Gansu (twice) and Hebei caused power losses of 840.43 MW, 1006.223 MW and 854 MW, respectively, which accounted for 54.4%, 54.17% and 48.5% of the total wind powered outputs. The massive shutdown of wind turbines resulted in serious operational difficulties as frequency dropped to 49.854 Hz, 49.815 Hz and 49.95 Hz in the corresponding regional power grids.The Chinese Renewable Energy Law requires the power grid operators to coordinate the integration of windmills and accept all of the wind powered electricity. However, the power grid companies have been reluctant to do so due to the above mentioned problems as well as technical and economic reasons. For instance, more than one third of the wind turbines in China, amounting to 4 GW capacity, were not connectedto the power grid by the end of 2008 [17]. Given that the national grid in China is exclusively controlled by the power companies –SGCC and CSG - the willingness of these companies to integrate wind energy into the electricity generation systems is critical.2.3. The interconnection of provincial and regional power gridsThe interconnection of trans-regional power grids started at the end of 1980s. A (HVDC) high voltage direct current transmission line was established to link the Gezhouba2 dam with Shanghai which signifies the beginning of regional power grids interconnection. In 2001, two regional power grids, the North China Power Grid and Northeast China Power Grid were interconnected. This was followed by the interconnection of the Central China Power Grid and the North China Power Grid in 2003. In 2005, two other interconnection agreements were made between the South China Power Grid with North, Northeast and Central China Power Grid, and the Northwest China Power Grid and the Central China Power Grid. Finally, in 2009, the interconnection of Central China Power Grid and the East China Power Grid was made. In today’s China, the Chinese power transmission systems are composed of 330 kV and 500 kV transmission lines as the backbone and six interconnected regional power grids and one Tibet power grid [26].It seems that the interconnectivity of regional power grids would help the delivery of wind powered outputs from wind-rich regions todemand centres. However, administrative and technical barriers still exist. First, the interconnectivity among regions is always considered as a backup to contingencies, and could not support the large-scale, long-distance electricity transmission [27]. In addition, the construction of transmission systems is far behind the expansion of wind power. The delivery of large amounts of wind power would be difficult due to limited transmission capacity. Furthermore, the quantity of inter-regional electricity transmission is fixed [27]. Additional wind power in the inter-regional transmission might have to go through complex administrative procedures and may result in profit reductions of conventional power plants.3. Are the backup systems geographically available and technically feasible?Power system operators maintain the security of power supply by holding power reserve capacities in operation. Although terminologies used in the classification of power reserves vary among countries [28], power reserves are always used to keep the production and generation in balance under a range of circumstances, including power plant outages, uncertain variations in load and fluctuations in power generations (such as wind) [29]. As wind speed varies on all time scales (e.g. from seconds to minutes and from months to years), the integration of fluctuating wind power generation induces additional system balancing requirements onthe operational timescale [29].A number of studies have examined the approaches to stabilize the electricity output from wind power plants. For example, Belanger and Gagnon [30] conducted a study on the compensation of wind power fluctuations by using hydropower in Canada. Nema et al. [31] discussed the application of wind combined solar PV power generation systems and concluded that the hybrid energy system was a viable alternative to current power supply systems in remote areas. In China, He et al. [2]investigated the choices of combined power generation systems. The combinations of wind-hydro, wind-diesel, wind-solar and wind-gas power were evaluated respectively. They found that, for instance, the wind-diesel hybrid systems were used at remote areas and isolated islands. This is because the wind-diesel hybrid systems have lower generation efficiency and higher generation costs compared to other generation systems. Currently, the wind-solar hybrid systems are not economically viable for large-scale application; thus, these systems have either been used at remote areas with limited electricity demand (e.g. Gansu Subei and Qinghai Tiansuo) or for lighting in some coastal cities [2]. Liu et al. [32] adopted the EnergyPLAN model to investigate the maximum wind power penetration level in the Chinese power system. The authors derived a conclusion that approximately 26% of national power demand could be supplied by wind power by the end of 2007. However, theauthors fail to explain the provision of power reserves at different time scales due to wind power integration.Because of the smoothing effects of dispersing wind turbines at different locations (as exemplified by Drake and Hubacek [33] for the U.K., Roques [34] for the E.U. and Kempton et al. [35] for the U.S.), the integration of wind power has a very small impact on the primary reserves which are available from seconds to minutes [36]. However, the increased reserve requirements are considerable on secondary reserves (available within 10–15 min) which mainly consist of hydropower plants and gas turbine power plants [29]. Besides, the long-term reserves, which are used to restore secondary reserves after a major power deficit, will be in operation to keep power production and consumption in balance for a longer timescale (from several minutes to several hours). In the following subsection, we examine the availability of power plants providing secondary and long-term reserves and investigate the viability of energy storage system in China.中文中国的风力发电–梦想还是现实？胡巴切克摘要经过近几年风力发电能力的巨大增长，中国现在拥有44.7吉瓦的风力发电。
光伏发电和风力发电混合发电系统论文中英文资料对照外文翻译文献综述
中英文资料对照外文翻译译文在混合光伏阵列中采用滑模技术的电源控制发电系统摘要变结构控制器来调节输出功率的一个独立的混合发电系统。
该系统包括光伏发电和风力发电，存储电池组和一个变量的单相负载。
控制律承认两种操作模式。
第一条用在当日晒度足够满足对电力的需求的情况下。
第二运作模式应用在日晒度不足的时候。
后者致使系统在最大功率操作点（MPOP）操作下存储尽可能多的能量。
根据IncCo nd算法开发的一种新方法。
滑模控制用于技术设计的控制律。
这些技术提供了一个简单的控制律设计框架，并有助于它们自带的鲁棒性。
最后，指导方针根据考虑为实际系统的设计。
1引言可再生能源，如风力和太阳能被认为是非常前途的能源。
它们拥有可以满足不断增加的世界能源需求的特点。
另一方面，他们是基于无公害转换流程，它们需要的主要资源是取之不尽，用之不竭，并且免费的。
对于远程、远离电网的地方，它往往是比用输电线路[1] 提供一个独立的电力来源拥有可行性。
在这些电网中，在混合动力系统结合模块的基础上，可再生能源发电以柴油为动力的备用发电机已考虑ERED等效为一个可行的选择[2, 3]。
然而，柴油发电机在孤立的燃料供应和其运作领域是相当麻烦，相比较可再生能源，显得不划算[4]。
为了取代柴油备用发电机，独立的混合动力系统经常采用结合可再生能源来源的TARY 型材，如风力和光伏发电，合适的存储设备，如电池。
自存储成本仍然是一个重大的经济约束，通常光伏/风能/电池系统是用“适当”的大小以减少资本成本。
本文提出了一种控制策略，以规范的混合动力系统，包括光伏发电和风力发电，蓄电池组和可变负载的输出功率作为研究。
控制可调整的光伏发电、风力发电，以满足负载和电池充电的电源要求。
系统以在独立控制下的最大发电的主要目标。
该控制器的设计开发，在之前的文献[5]中提过。
因此，根据不同的大气条件，不同的光伏阵列控制律使用的范围不同。
第一条用在暴晒的地方，运作模式足以提供的总功率需求，和风力发电一起适用。
风力发电调查英文文献
Smart Grid and Renewable Energy, 2010, 1, 119-131doi:10.4236/sgre.2010.13017 Published Online November 2010 (/journal/sgre)119 Wind Energy Conversion System from Electrical Perspective—A SurveyHyong Sik Kim, Dylan Dah-Chuan LuSchool of Electrical and Information Engineering, University of Sydney,Sydney, AustraliaEmail: hkim4210@.auReceived October 20th, 2010; revised November 14th, 2010; accepted November 20th, 2010ABSTRACTThis paper focuses on the wind energy conversion system (WECS) with the three main electrical aspects:1) wind tur-bine generators (WTGs),2) power electronics converters (PECs) and 3) grid-connection issues. The current state of wind turbine generators are discussed and compared in some criteria along with the trends in the current WECS mar-ket, which are ‘Variable Speed’,‘Multi-MW’ and ‘Offshore’. In addition, the other crucial component in the WECS, PECs will be discussed with its topologies available in the current WECS market along with their modulation strategies. Moreover, three main issues of the WECS associating with the grid-connection, fault-ride through (FRT) capability, harmonics/interharmonics emission and flicker, which are the power quality issues, will be discussed due to the in-creasing responsibility of WECS as utility power station. Some key findings from the review such as the attractiveness of BDFRG are presented in the conclusion of this paper.Keywords: Wind Energy, Wind Turbine Generators, Power Electronic Converters, Grid-Connection, Brushless, Reluctance, Pulse-Width Modulation, Fault Ride Through Capability, Voltage Dip, Harmonics, Flicker,Power Quality, BDFRG1. IntroductionGreen house gas reduction has been one of the crucial and inevitable global challenges, especially for the last two decades as more evidences on global warming have been reported. This has drawn increasing attention to renewable energies including wind energy, which is re-garded as a relatively mature technology [1]. It recorded 159 GW for the total wind energy capacities in 2009, which is the highest capacity among the existing renew-able energy sources with excluding large-scale hydro power generators as shown in Figure 1 [2].Also, its annual installation growth rate marked 31.7% in 2009 with its growth rate having been increasing for the last few years, which indicates that wind energy is one of the fastest growing and attractive renewable en-ergy sources [3]. The increasing price-competitiveness of wind energy against other conventional fossil fuel energy sources such as coal and natural gas is another positive indication on wind energy [4]. Therefore, a vast amount of researches on WECS have been and is being under-taken intensively.WECS consists of three major aspects; aerodynamic, mechanical and electrical as shown in Figure 2.The electrical aspect of WECS can further be divided into three main components, which are wind turbine generators (WTGs), power electronic converters (PECs) and the utility grid.There are many review papers on those electrical as-pects available; however, there seem small amount of investigation and discussion on some newer concepts ofFigure 1. World renewable energy capacities in 2009 (based on [2]).Wind Energy Conversion System from Electrical Perspective—A Survey 120Figure 2. Wind energy conversion system (based on [5,6]).WGTs as well as PECs along with its modulation strate-gies. The purpose of this paper is, therefore, to reviewthese three important electrical aspects of WECS withsome of the newer concepts for WTGs, PECs with theirmodulation strategies, and some of the grid connectionissues that have risen as the penetration of wind energyon the utility grid has been increasing rapidly in the lastfew years [4].The structure of this paper is as follows: wind turbinegenerators are firstly discussed in Section 2, followed byPECs and their modulation strategies in Section 3. Then,grid-connection issues of WECS will be addressed inSection 4. In Section 5, the discussion on these three com-ponents is presented and followed by the conclusion inSection 6.2. Wind Turbine Generators2.1. Wind Turbine Generators in the CurrentMarketWTGs can be classified into three types according to itsoperation speed and the size of the associated convertersas below:∙FSWT (Fixed Speed Wind Turbine)∙VSWT (Variable Speed Wind Turbine) with:o PSFC (partial scale frequency converter)o FSFC (full scale frequency converter)FSWT including SCIG (Squirrel-Cage Induction Gen-erator), led the market until 2003 when DFIG (DoublyFed Induction Generator), which is the main concept ofVSWT with PSFC, overtook and has been the leadingWTG concept with 85% of the market share reported in2008 [4]. For VSWT with FSFC, WRSG (Wound RotorSynchronous Generator) has been the main concept;however PMSG (Permanent Magnet Synchronous Gen-erator) has been drawing more attention and increasingits market share in the past recent years due to the bene-fits of PMSG and drawbacks of WRSG [7].Since there is much literature available on these WTGconcepts in the market such as [6-13], the following sec-tion will only address the two newer concepts of WTGs,which are BDFIG (Brushless Doubly Fed InductionGenerator) and BDFRG (Brushless Doubly Fed Reluc-tance Generator), followed by the discussion with thecomparison of them to the existing concepts.2.2. Two Newer WTG Concepts2.2.1. BDFIGBDFIG is one of the most popular VSWT with PSFCtypes in the current research area due to its inheritedcharacteristics of DFIG, which is the most popular WTGtype at the current market, along with its brushless aspectthat DFIG do not possess. As shown in Figure 3, BDFIGconsists of two cascaded induction machines; one is forthe generation and the other is for the control in order toeliminate the use of sliprings and brushes, which are themain drawback of DFIG.This brushless aspect increases its reliability, which isespecially desirable in offshore application [14,15]. Otheradvantages are reported in [6,16,17] including its capa-bility with low operation speed. On the other hand,BDFIG has relatively complex aspects in its design, as-sembly and control, which are some of the main disad-vantages of BDFIG [8].2.2.2. BDFRGThere is also another brushless and two-cascaded-statorconcept of VSWT with PSFC type in the research area,which is BDFRG. As shown in Figure 4, one distinctdesign compared with BDFIG is its reluctance rotor,which is usually an iron rotor without copper windings,which has lower cost than wound rotor or PM (perma-nent magnet) rotor.This design offers some advantages on top of the ad-vantages of BDFIG including higher efficiency, easierconstruction and control including power factor controlcapability as well as the cost reduction and higher reli-ability including its “fail-safe” operating mode due to itsreluctance rotor [18-21]. Due to its very high reliability,reluctance generators have also been of interest in air-craft industry where design challenges such as harsh en-vironment operation and stringent reliability exist [22,23]. On the other hand, some of the drawbacks for BDFRGexist such as complexity of rotor deign, its larger ma-chine size due to a lower torque-volume ratio and soforth [20,24,25].Wind Energy Conversion System from Electrical Perspective—A Survey121 Figure 3. The conceptual diagram of BDFIG.Figure 4. The conceptual diagram of BDFRG.2.3. Comparison of WTG ConceptsThe advantages and disadvantages of the six concepts,the four existing in the current market and the two newerconcepts discussed in the previous section are summa-rised in Table 1 [6-21,24,25].Based on the information in Table 1, Table 2 repre-sents a comparison of those six concepts with respect tothe five criteria; energy yield, cost, reliability, grid sup-port ability and technical maturity. For energy yield,PMSG has the highest rating followed by the otherVSWT concepts and SCIG has the lowest energy yieldwith 10-15% lower value than PMSG [26] due to its fixspeed aspect. However, SCIG has the lowest cost fol-lowed by BDFRG, and WRSG has the highest cost dueto its large size wound machine. It is interesting when‘energy yield per cost’ is considered based on the esti-mated levels on energy yield and cost in Table 2. Thehighest value is achieved by neither PMSG nor SCIG;BDFRG achieves the highest estimated levels on ‘energyyield per cost’, which is supported in [19]. Reliability isclosely related to the existence of brushes and sliprings,which is the main drawback of DFIG. The reason BDFIGis rated as ‘Medium-High’ despite of its brushless aspectis because it is new and has design complexity, whichbrings down reliability as the case of the newer GermanWTGs compared with older Danish WTGs reported in[12]. On the other hand, BDFRG is rated as ‘High’ de-spite of that it is as new concept as BDFIG. It is becauseof the ‘fail-safe’ characteristic of BDFRG, which enablesits robust operation in spite of the failure on its inverteror secondary stator. Grid support ability is affected main-ly by the size of the converter and the stator connection.VSWT with FSFC has high support ability due to its fullscale frequency converter. In the case of DFIG, withPSFC, it can only provide limited support to the grid dueto its directly connected stator that absorbs the effect ofgrid fault without any mitigation. It is reported thatBDFIG and BDFRG have improved characteristics undergrid fault [16] and for grid support ability [19] respec-tively. Lastly, the maturity of the technology is straight-forward as shown in Table 2 because SCIG, DFIG andWRSG have been developed for more than a couple ofdecades followed by PMSG. As mentioned before, BDFIGand BDFRG are newer concept and therefore more re-searches are needed in order to increase its technical ma-turity and hence to be applicable in the industry.2.4. Discussion on WTGsAs observed previously, there has been ‘variable speed’trend in the WT market due to its greater energy yieldalong with other advantages and will be so in the futurewith DFIG and PMSG leading the market base on thevarious data and literature [4,8,9,27]. The two newerconcepts, BDFIG and BDFRG are also in line with thistrend.Another distinct trend is offshore wind energy. It isreported that offshore wind resource has higher quality interms of its availability and constancy, and higher spatialavailability than onshore wind resource, which makesoffshore wind very attractive [28]. However, there existgreat technical challenges on its construction and main-tenance, because of its geological accessibility that greatlydepends on the weather condition, which is an unpre-dictable external factor. Due to this reason, offshore windhas only 1.2% of the world’s total installed wind energyshare (onshore and offshore) at the current market [3]and is reported to cost 1.5-2 times more than equal-sizeonshore wind application [29]. As discussed previously,DFIG is less attractive for offshore application due to itspre-planned maintenance for brush and sliprings whereasPMSG, BDFIG and BDFRG are more attractive due toits brushless aspect. BDFRG is especially attractive forits reliability due to its reluctance rotor as discussed pre-viously. Although offshore wind has low level of instal-lation at the present, the growth rate was reported to be30% in 2009 and is expected to continue to grow [3,28].Lastly, ‘Multi-MW’ trend is also observed at the cur-rent wind turbine market [4,9,27] due to the fact that lar-ger power station has lower cost per kWh. The size of theturbine in the current market has gone up to 5-6 MW oreven greater [27], supported by the increased technicallevel in design and construction. In terms of the cost ofthe material, DFIG and BDFRG are preferable overPMSG and BDFIG for this trend since PM material inPMSG is costly, and BDFIG has a wound rotor with theWind Energy Conversion System from Electrical Perspective—A Survey122Table 1. The advantages and disadvantages of the six WTG concepts.Generator Concept (Type) Advantages DisadvantagesSCIG (FSWT) ∙Easier to design, construct and control∙Robust operation∙Low cost∙Low energy yield∙No active/reactive power controllability∙High mechanical stress∙High losses on gearPMSG (VSWT-FSPC) ∙Highest energy yield∙Higher active/reactive power controllability∙Absence of brush/slipring∙Low mechanical stress∙No copper loss on rotor∙High cost of PM material∙Demagnetisation of PM∙Complex construction process∙Higher cost on PEC∙Higher losses on PEC∙Large sizeWRSG (VSWT-FSPC) ∙High energy yield∙Higher active/reactive power controllability∙Absence of brush/slipring∙Low mechanical stress∙Higher cost of copper winding∙Higher cost on PEC∙Higher losses on PEC∙Large sizeDFIG (VSWT-PSPC) ∙High energy yield∙High active/reactive power controllability∙Lower cost on PEC∙Lower losses by PEC∙Less mechanical stress∙Compact size∙Existence of brush/slipring∙High losses on gearBDFIG (VSWT-PSPC) ∙Higher energy yield∙High active/reactive power controllability∙Lower cost on PEC∙Lower losses by PEC∙Absence of brush/slipring∙Less mechanical stress∙Compact size∙Early technical stage∙Complex controllability, design and assembly∙High losses on gearBDFRG (VSWT-PSPC) ∙Higher energy yield∙High active/reactive power controllability∙Lower cost on PEC∙Lower losses by PEC∙Absence of brush/slipring∙No copper loss on rotor∙Less mechanical stress∙Easier construction∙Early technical stage∙Complex controllability and rotor design∙High losses on gear∙Larger size than DFIGTable 2. The comparison of the six different WTG concepts.Generator Concept Energy Yield Cost Reliability Grid Support Ability Technical Maturity SCIG Low Low High Low High PMSG High Medium-High High High Medium-High WRSG Medium-High High High High High DFIG Medium-High Medium Medium Medium High BDFIG Medium-High Medium Medium-High Medium-High Low BDFRG Medium-High Low-Medium High Medium-High LowWind Energy Conversion System from Electrical Perspective—A Survey 123two wound cascaded stator, which has greater amount of windings than DFIG or BDFRG.3. Power Electronic Converters3.1. Topology of Power Electronic ConvertersAs the amount of the installed VSWT increased, so has the importance of PECs in WECS since it is the interface between WTGs and the electrical grid [1,11,30]. There are three types of converters widely available in the cur-rent wind energy market: Back-to-back PWM converter, multilevel converter and matrix converter.3.1.1. Back-to-back PWM ConvertersBack-to-back PWM converter, which is also referred as ‘two-level PWM converter’, is the most conventional type among the PEC types for VSWT. As shown in Fig-ure 5, it consists of two PWM-VSIs (voltage source in-verters) and a capacitor in between. This capacitor is often referred as a ‘DC link capacitor’ or ‘decoupling capacitor’ since it provides a separate control in the in-verters on the two sides, which are ‘machine’ and ‘grid’ side. In addition, it has lower cost due to its maturity [12].However, the DC link capacitor also becomes the main drawback of the PWM converter because it decreases the overall lifetime of the system [31]. There are other dis-advantages including switching losses and emission of high frequency harmonics, which results in additional cost in EMI-filters [1,12].3.1.2. Multilevel ConvertersCompared with two-level PWM converter, multilevel (ML) converter has three or more voltage levels, which results in lower total harmonic distortion (THD) than back-to-back PWM converter does [32]. In addition, ML converter offers higher voltage and power capability, which advocates the trend of ‘Multi-MW’ wind turbine [1,33]. Another advantage is that switching losses are smaller in ML converter than two-level PWM converter by 25% [34].One of the disadvantages on ML converter is the volt-age imbalance caused by the DC link capacitors [35,36]. Another disadvantage in some ML converter designs is uneven current stress on the switches due to its circuit design characteristic. The cost associated with the highFigure 5. Basic schematics of Back-to-Back PWM converter (based on [12]). more number of switches and the complexity of control are two other drawbacks.Since the first proposed design of ML converter, the neutral-point clamped three-level converter in 1981 [36,37], there have been various designs for ML converters in-cluding the followings [33,35,36,38]:∙Neutral Point Clamped (NPC) ML converter∙Cascade Half-Bridge (CHB) ML converter∙Fly-capacitor (FLC) ML converterThe detail of each design, which is beyond the scope of this paper, can be found in the literatures [33,35,36, 38].Out of these three ML converter designs, NPC ML converter is commonly utilised in WECS, especially in multi-MW scale WECS, due to its maturity and advan-tages [36,39]. Main drawback exists, however, with 3L- NPC (3 level-NPC) design, which is the uneven loss dis-tribution among the semiconductor devices, limiting output power of the converter [40,41]. This drawback has been overcome with the replacement of the clamping diode with the active switching devices. This modified design of NPC is referred as ‘Active NPC’ (ANPC), which was first introduced in 2001 [41,42], as shown in Figure 6. There are many advantages of ANPC including higher power rating than normal NPC by 14% [40] and robustness against the fault condition [43].3.1.3. Matrix ConvertersMatrix converters have a distinct difference from the previous two converters in a way that it is an AC-AC converter without any DC conversion in between, which indicates the absence of passive components such as the DC link capacitor and inductor in the converter design. As shown in Figure 7, the typical design of matrix con-verters consists of 9 semi-conductors that are controlled(a) (b)Figure 6. One inverter cell of (a) NPC and (b) ANPC (based on [12,36]).Wind Energy Conversion System from Electrical Perspective—A Survey124Figure 7. Basic schematics of matrix converter (based on [12,45]).with two control rules to protect the converter; three switches in a common output leg must not be turned on at the same time and the connection of all the three out-put phases must be made to an input phase constantly [12]. There are some advantages of matrix converters. The absence of DC link capacitor results in increased efficiency and overall life time of the converter as well as the reduced size and cost compared with PWM-VSI converter [4,44]. The thermal characteristic of the matrix converter is also another advantage since it can operate at the temperature up to 300˚C, which enables to adopt new technologies such as high temperature silicon carbide devices [44]. On the other hand, some of the reported disadvantages include; the limitation on the output volt-age (86% of the input voltage), its sensitivity to the grid disturbances and rapid change of the input voltage, higher conducting losses and higher cost of the switch components than PWM-VSI converter [12,32]. Further technical details of matrix converter can be found in [44]. 3.1.4. Discussion on PECIn this section, the PECs will be discussed with the crite-ria such as their power loss, loss distribution, efficiency, harmonic performance and cost.In terms of power losses, it is widely reported that ML VSCs have less power losses than 2L VSIs with 3-Level Neutral Point Clamped VSIs (3L-NPC) having even lower amount of losses over 3-Level Flying Capacitor VSIs (3L-FLC) [46-48]. This advantage of 3L-NPC, however, inherits poor power loss distribution, which is the main drawback of 3L-NPC as mentioned previously. Loss distribution is an important aspect in PEC since uneven loss distribution means uneven stress distribution among the semiconductor devices and this results the most stressed switching device to limit the total output power and switching frequency [49]. In [46,47], uneven loss distribution of 3L-NPC is reported along with other topologies such as 2L-VSI and 3L-FLC, which have even distribution. As mentioned previously, ANPC is the to-pology to reduce the unevenness among the switching devices and it is reported that 3L-ANPC possess an ad-vantage of 3L-FLC on its natural doubling of switching frequency, without flying-capacitors [50].Harmonic performance is another crucial criterion of PEC, especially for WECS as the impact of WECS on power quality of the power grid is increasing due to its increasing penetration level. The comparison on har-monic performance is commonly measured by total har-monic distortion (THD) or weighted THD (WTHD). A comparison on THD of 2L-VSI, 3L-NPC and matrix converter with PMSG is undertaken in [51] and 3L-NPC provides the lowest value of THD among the three to-pologies. This result verifies that THD decreases with increasing number of levels [46].Different PEC topologies consist of components with variable numbers and sizes that result variation in cost. Although 2L-VSI has less number of components com-pare to ML VSIs, it is estimated to be more costly due to its large LC filter, which is the result of compromise for high efficiency and low THD that ML can achieve with smaller LC filter [47,48]. Matrix converters would lie in between 2L VSIs and 3L VSIs since it has smaller num-ber of semiconductors and LC filters are required to minimise the switching frequency harmonics [52]. The cost estimation would be similar for both 3L-NPC and 3L-FLC since the excessive cost for the larger LC filter and semiconductors would be compensated with the cost for flying capacitors by considering the cost estimation in [47] with the constant switching frequency. In [53], comparison between 3L-ANPC and 3L-NPC is conducted with different IGBT ratings available in the market. In the literature, it is found that 3L-NPC is most economical (i.e. lest cost per MVA) with 2.3 kV IGBT modules at any switching frequency between 300 Hz to 1050 Hz. However, 3L-ANPC becomes more cost-effective with 3.3 kV and 4.16 kV at switching frequency over 750 Hz. In summary, it is evident that 3L-ANPC is a very at-tractive PEC topology for WECS, which is increasing its power rating, operates with high switching frequency (typically 2~5 kHz [47,51,54-57]) and requires low har-monic emission.3.2. Modulation MethodsAlong with the converter topologies, there are some modulation strategies available to produce a desired level of output voltage and current in lower frequency. Pulse- width modulation (PWM) is one of the most widely used modulation strategies for PEC with AC output, hence, this section will focus on PWM schemes for ML con-verters.While the primary goal of PWM is to produce a tar-geted low-frequency output voltage or current, it is also essential for PWM schemes to minimise the impact on the quality of the output signals such as harmonic distor-tion.Wind Energy Conversion System from Electrical Perspective—A Survey 125Among the vast amount of proposed PWM schemes, majority of them can be categorised into the following three types despite of different converter topologies [33, 36,53]:∙Carrier-Based PWM∙Space Vector Modulation (SVM)∙Selective Harmonic Elimination (SHE)These three PWM strategies will be explained in detail on the next section.3.2.1. Carrier-Based PWMCarrier-based PWM strategy has been widely utilised as the basic logic of generating the switching states is sim-ple. The basic principle is to compare a low frequency sinusoidal reference voltages to high frequency carrier signals, then produce the switching states every time the reference signal intersects carrier signals. The number of carrier signals is defined as (N-1), where N is the number of the level of multi-level VSI (eg. N = 3 for 3-Level NPC VSI) [58].The basic control diagram and modulation signals of 3-Level VSI are represented in Figure 8.From the conventional schemes, there are some modi-fied techniques proposed with multi-level or multi-phase methods in order to reduce distortion in ML inverters [59]. Basic concepts of those are shown in Figure 9.3.2.2. Space Vector Modulation (SVM)Space vector modulation (SVM) is the PWM method based on the space vector concept with d-q transforma-tion that is widely utilised in AC machines. With the de-velopment of microprocessors, it has become one of the most widely used PWM strategies for three-phase con-verters due to some of its advantages including high voltage availability, low harmonics, simple digital im-plementation and wide linear modulation range, which is one of the main aims of PWM [4,47,60].There are N3 switching states in N-level PWM inverter so in the case of 3-Level NPC VSI, there are 27 (= 33) possible switching states. As shown in Figure 10, these switching states define reference vectors, which are rep-resented by the 19 nodes in the diagram with the four classification of ‘zero’ (V0), ‘small’ (V Si), ‘medium’ (V Mi) and ‘large’ (V Li), where i = 1,2,…,6 [61]. The difference between the numbers of the switching states and space vectors indicate that there is redundancy of switching states existing for some space vectors. As indicated in Figure 10, one ‘zero’ space vector (i.e.V0) can be generated by three different switching states and six ‘small’ space vector (i.e.V Si) by two different switching states each. These redundancies provide some benefits including balancing the capacitor voltages in 3L-NPC VSI [36]. The basic principle of SVM is to select three nearest(a)(b)Figure 8. (a) Control diagram, (b) Modulation signal (sources from [36]).vectors that consist of a triangle in the space vector dia-gram that the tip of a desired reference vector is located, and generate PWM according to the switching states of those selected vectors. There are many researches on SVM to improve on various aspects such as the im-provement in neutral point (NP) balancing at higher modulation indexes [62] and the reduction of the size of DC-link in control loop for renewable application such as WECS [63].3.2.3. Selective Harmonic EliminationThe basic principle is to calculate N number of switching angles that are less than π/2 for a N-Level inverter through N number of the nonlinear equation with Fourier expansion of output voltage [64]. One equation is used toWind Energy Conversion System from Electrical Perspective—A Survey126(a)(b)Figure 9. (a) Multi-level PWM, (b) Multi-phase PWM (sources from [33]).Figure 10. Normalised space vector diagram for the three- level NPC converter (based on [61]).control the fundamental frequency through the modula-tion index and the other N-1 equations are used for elimination of the low-order harmonics components [59]. In the case of 3-Level VSI, 5th and 7th harmonic compo-nents are the two lowest-order harmonics to be elimi-nated since 3rd harmonic component is cancelled by the nature of three-phase [53]. Figure 11 depicts an example of the 3-Level SHE with 3 switching angles, a 1, a 2 & a 3 [36].It is well-known that SHE strategy provides good harmonic performance in spite of the low switching fre-quency due to its harmonic elimination nature [53,65]. Another advantage is the reduction on its switching loss due to the low switching frequency [36]. However, there are some disadvantages exist including its heavy compu-tational cost and narrow modulation range [59,65]. There are many researches on SHE such as NP balancing for 3L-NPC [36] and the increase of the number of elimi-nating low-order harmonics with simple in formulation [66].3.2.4. Discussion on Modulation MethodAmong the three modulation methods discussed above, CB-PWM [67-70] and SVM [32,56,71-74] are widely utilised in WECS. However, SHE strategy has not been utilised in WECS to the best knowledge of the author despite of its active researches with resent PEC tech-nologies such as 5-Level ANPC VSI [75]. The authors in [53] suggest the combination of using 2L SVM and SHE schemes for the switching frequency f sw ≤ 500 Hz whereas the combination of 2L SVM and 3L SVM for f sw > 500 Hz due to their performances with respect to the modulation index and switching frequency. This could be one reason for SHE schemes not to be utilised in WECS where high switching frequency is used.However, if the reason of high switching frequency in WECS is for the quality of output power, lower switch-ing frequency can be adapted with SHE strategy in WECS for high quality of output power. This would in-crease the efficiency of WECS due to less switching losses and also this will reduce a cost of filter circuits since the size of the filter would be smaller with the na-ture of harmonic elimination of SHE.Figure 11. 3-level SHE (Source from [36]).。
风力发电相关专业英语中文对照
风力发电机用专业英语中文对照风力发电机windturbine风电场windpowerstationwindfarm风力发电机组windturbinegeneratorsystemWTGS水平轴风力发电机horizontalaxiswindturbine垂直轴风力发电机verticalaxiswindturbin风力发电机用专业英语中文对照风力发电机wind turbine风电场 wind power station wind farm风力发电机组 wind turbine generator system WTGS水平轴风力发电机 horizontal axis wind turbine垂直轴风力发电机 vertical axis wind turbine轮毂（风力发电机） hub (for wind turbine)机舱 nacelle支撑结构 support structure for wind turbine关机 shutdown for wind turbine正常关机 normal shutdown for wind turbine紧急关机 emergency shutdown for wind turbine空转 idling锁定 blocking停机 parking静止 standstill制动器 brake停机制动 parking brake风轮转速 rotor speed控制系统 control system保护系统 protection system偏航 yawing设计和安全参数 design situation设计工况 design situation载荷状况 load case外部条件 external conditions设计极限 design limits极限状态 limit state使用极限状态 serviceability limit states极限限制状态 ultimate limit state最大极限状态 ultimate limit state安全寿命 safe life严重故障 catastrophic failure潜伏故障 latent fault dormant failure风特性wind characteristic风速 wind speed风矢量 wind velocity旋转采样风矢量 rotationally sampled wind velocity 额定风速 rated wind speed切入风速 cut-in speed切出风速 cut-out speed年平均annual average年平均风速 annual average wind speed平均风速mean wind speed极端风速 extreme wind speed安全风速 survival wind speed参考风速reference wind speed风速分布 wind speed distribution瑞利分布RayLeigh distribution威布尔分布 Weibull distribution风切变 wind shear风廓线风切变律 wind profile wind shear law风切变指数wind shear exponent对数风切变律 logarithmic wind shear law风切变幂律 power law for wind shear下风向down wind上风向 up wind阵风gust粗糙长度 roughness length湍流强度 turbulence intensity湍流尺度参数turbulence scale parameter湍流惯性负区 inertial sub-range风场 wind site测量参数 measurement parameters测量位置 measurement seat最大风速 maximum wind speed风功率密度 wind power density风能密度 wind energy density日变化 diurnal variation年变化 annual variation轮毂高度 hub height风能 wind energy标准大气状态 standard atmospheric state风切变影响 influence by the wind shear阵风影响 gust influence风速频率 frequency of wind speed环境 environment工作环境 operational environment气候 climate海洋性气候 ocean climate大陆性气候 continental climate露天气候 open-air climate室内气候 indoor climate极端 extreme日平均值 daily mean极端最高 extreme maximum年最高 annual maximum年最高日平均温度 annual extreme daily mean of temperature 月平均温度 mean monthly temperature空气湿度 air humidity绝对湿度 absolute humidity相对湿度 relative humidity降水 precipitation雨 rain冻雨 freezing rain霜淞 rime雨淞 glaze冰雹 hail露 dew雾 fog盐雾 salt fog雷暴 thunderstorm雪载 snow load标准大气压 standard air pressure平均海平面 mean sea level海拔 altitude辐射通量 radiant flux太阳辐射 solar radiation直接太阳辐射 direct solar radiation天空辐射 sky radiation太阳常数 solar constant太阳光谱 solar spectrum黑体 black body白体 white body温室效应 greenhouse effect环境温度 ambient temperature表面温度 surface temperature互联 interconnection输出功率output power额定功率 rated power最大功率 maximum power电网连接点 network connection point电力汇集系统 power collection system风场电器设备 site electrical facilities功率特性power performance静电功率输出 net electric power output功率系数 power performance自由流风速 free stream wind speed扫掠面积 swept area轮毂高度 hub height测量功率曲线 measurement power curve外推功率曲线 extrapolated power curve年发电量 annual energy production可利用率 availability数据组功率特性测试 data set for power performance measurement 精度 accuracy测量误差 uncertainty in measurement分组方法 method of bins测量周期 measurement period测量扇区 measurement sector日变化 diurnal variations浆距角 pitch angle距离常数 distance constant试验场地 test site气流畸变 flow distortion障碍物 obstacles复杂地形带 complex terrain风障 wind break声压级 sound pressure level声级 weighted sound pressure level; sound level 视在声功率级 apparent sound power level指向性 directivity音值 tonality声的基准面风速 acoustic reference wind speed标准风速 standardized wind speed基准高度 reference height基准粗糙长度 reference roughness length基准距离 reference distance掠射角 grazing angle风轮风轮 wind rotor风轮直径 rotor diameter风轮扫掠面积 rotor swept area风轮仰角 tilt angle of rotor shaft风轮偏航角 yawing angle of rotor shaft风轮额定转速 rated turning speed of rotor风轮最高转速 maximum turning speed of rotor风轮尾流 rotor wake尾流损失 wake losses风轮实度 rotor solidity实度损失 solidity losses叶片数 number of blades叶片 blade等截面叶片 constant chord blade变截面叶片variable chord blade叶片投影面积 projected area of blade叶片长度 length of blade叶根 root of blade叶尖tip of blade叶尖速度 tip speed浆距角 pitch angle翼型 airfoil前缘 leading edge后缘tailing edge几何弦长 geometric chord of airfoil平均几何弦长 mean geometric of airfoil气动弦线 aerodynamic chord of airfoil翼型厚度 thickness of airfoil翼型相对厚度 relative thickness of airfoil厚度函数 thickness function of airfoil中弧线 mean line弯度 degree of curvature翼型族 the family of airfoil弯度函数 curvature function of airfoil叶片根梢比 ratio of tip-section chord to root-section chord叶片展弦比 aspect ratio叶片安装角setting angle of blade叶片扭角 twist of blade叶片几何攻角 angle of attack of blade叶片损失blade losses叶尖损失tip losses颤振flutter迎风机构orientation mechanism调速机构 regulating mechanism风轮偏测式调速机构 regulating mechanism of turning wind rotor out of the wind sideward变浆距调速机构regulating mechanism by adjusting the pitch of blade整流罩 nose cone顺浆 feathering阻尼板spoiling flap风轮空气动力特性 aerodynamic characteristics of rotor叶尖速度比 tip-speed ratio额定叶尖速度比 rated tip-speed ratio升力系数 lift coefficient阻力系数 drag coefficient推或拉力系数 thrust coefficient偏航系统滑动制动器sliding shoes偏航 yawing主动偏航active yawing被动偏航 passive yawing偏航驱动 yawing driven解缆 untwist塔架tower独立式塔架 free stand tower拉索式塔架 guyed tower塔影响效应 influence by the tower shadow <<功率特性测试>>功率特性 power performance净电功率输出 net electric power output功率系数 power coefficient自由流风速 free stream wind speed扫掠面积swept area测量功率曲线 measured power curve外推功率曲线 extrapolated power curve年发电量 annual energy production数据组 data set可利用率 availability精度 accuracy测量误差 uncertainty in measurement分组方法 method of bins测量周期 measurement period测量扇区 measurement sector距离常数 distance constant试验场地 test site气流畸变 flow distortion复杂地形地带 complex terrain风障 wind break声压级 sound pressure level声级 weighted sound pressure level视在声功率级 apparent sound power level指向性 directivity音值 tonality声的基准风速 acoustic reference wind speed 标准风速 standardized wind speed基准高度 reference height基准粗糙长度 reference roughness基准距离 reference distance掠射角 grazing angle比恩法 method of bins标准误差 standard uncertainty风能利用系数 rotor power coefficient力矩系数 torque coefficient额定力矩系数 rated torque coefficient起动力矩系数starting torque coefficient最大力矩系数maximum torque coefficient过载度 ratio of over load风力发电机组输出特性 output characteristic of WTGS调节特性 regulating characteristics平均噪声 average noise level机组效率efficiency of WTGS使用寿命 service life度电成本 cost per kilowatt hour of the electricity generated by WTGS 发电机同步电机 synchronous generator异步电机 asynchronous generator感应电机 induction generator转差率 slip瞬态电流 transient rotor笼型 cage绕线转子 wound rotor绕组系数 winding factor换向器 commutator集电环 collector ring换向片 commutator segment励磁响应 excitation response制动系统制动系统 braking制动机构 brake mechanism正常制动系 normal braking system紧急制动系 emergency braking system空气制动系 air braking system液压制动系 hydraulic braking system电磁制动系 electromagnetic braking system机械制动系 mechanical braking system辅助装置 auxiliary device制动器释放 braking releasing制动器闭合 brake setting液压缸 hydraulic cylinder溢流阀 relief valve泻油 drain齿轮马达 gear motor齿轮泵 gear pump电磁阀solenoid液压过滤器 hydraulic filter液压泵hydraulic pump液压系统 hydraulic system油冷却器 oil cooler压力控制器pressure control valve压力继电器pressure switch减压阀reducing valve安全阀 safety valve设定压力setting pressure切换switching旋转接头rotating union压力表pressure gauge液压油hydraulic fluid液压马达hydraulic motor油封oil seal刹车盘 brake disc闸垫 brake pad刹车油 brake fluid闸衬片 brake lining传动比 transmission ratio齿轮gear齿轮副gear pair平行轴齿轮副 gear pair with parallel axes 齿轮系 train of gears行星齿轮系 planetary gear train小齿轮 pinion大齿轮 wheel , gear主动齿轮 driving, gear从动齿轮 driven gear行星齿轮 planet gear行星架 planet carrier太阳轮 sun gear内齿圈 ring gear外齿轮external gear内齿轮internal内齿轮副 internal gear pair增速齿轮副 speed increasing gear增速齿轮系 speed increasing gear train中心距 center distance增速比 speed increasing ratio齿面 tooth flank工作齿面 working flank非工作齿面non-working flank模数 module齿数 number of teeth啮合干涉 meshing interference齿廓修行 profile modification , profile correction 啮合 engagement, mesh齿轮的变位 addendum modification on gears变位齿轮 gears with addendum modification圆柱齿轮 cylindrical gear直齿圆柱齿轮 spur gear斜齿圆柱齿轮 helical gear single-helical gear节点 pitch point节圆pitch circle齿顶圆 tip circle齿根圆 root circle直径和半径 diameter and radius齿宽 face width齿厚 tooth thickness压力角 pressure angle圆周侧隙 circumferential backlash蜗杆 worm蜗轮 worm wheel联轴器 coupling刚性联轴器 rigid coupling万向联轴器 universal coupling安全联轴器 security coupling齿 tooth齿槽 tooth space斜齿轮 helical gear人字齿轮 double-helical gear齿距 pitch法向齿距 normal pitch轴向齿距 axial pitch齿高 tooth depth输入角 input shaft输出角 output shaft柱销pin柱销套roller行星齿轮传动机构planetary gear drive mechanism 中心轮 center gear单级行星齿轮系 single planetary gear train柔性齿轮 flexible gear刚性齿轮 rigidity gear柔性滚动轴承 flexible rolling bearing输出联接 output coupling刚度 rigidity扭转刚度 torsional rigidity弯曲刚度 flexural rigidity扭转刚度系数 coefficient of torsional起动力矩 starting torque传动误差 transmission error传动精度 transmission accuracy固有频率 natural frequency弹性联接 elastic coupling刚性联接 rigid coupling滑块联接 Oldham coupling固定联接 integrated coupling齿啮式联接 dynamic coupling花键式联接 splined coupling牙嵌式联接 castellated coupling径向销联接 radial pin coupling周期振动 periodic vibration随机振动 random vibration峰值 peak value临界阻尼 critical damping阻尼系数 damping coefficient阻尼比 damping ratio减震器 vibration isolator振动频率 vibration frequency幅值 amplitude位移幅值displacement amplitude速度幅值 velocity amplitude加速度幅值 acceleration amplitude控制与监控系统远程监视 telemonitoring协议 protocol实时 real time单向传输 simplex transmission半双工传输 half-duplex transmission双工传输 duplex transmission前置机 front end processor运输终端 remote terminal unit调制解调器 modulator-demodulator数据终端设备 data terminal equipment接口 interface数据电路 data circuit信息 information状态信息 state information分接头位置信息 tap position information监视信息 monitored information设备故障信息 equipment failure information告警 alarm返回信息 return information设定值 set point value累积值 integrated total integrated value瞬时测值 instantaneous measured计量值 counted measured metered measured metered reading 确认 acknowledgement信号 signal模拟信号 analog signal命令 command字节 byte位bit地址 address波特 baud编码 encode译码 decode代码 code集中控制 centralized control可编程序控制 programmable control 微机程控 minicomputer program模拟控制 analogue control数字控制 digital control强电控制 strong current control弱电控制weak current control单元控制unit control就地控制local control联锁装置interlocker模拟盘analogue board配电盘switch board控制台control desk紧急停车按钮emergency stop push-button 限位开关limit switch限速开关limit speed switch有载指示器on-load indicator屏幕显示screen display指示灯display lamp起动信号starting signal公共供电点point of common coupling闪变flicker数据库data base硬件hardware硬件平台hardware platform层layer level class模型model响应时间response time软件software软件平台software platform系统软件system software自由脱扣trip-free基准误差basic error一对一控制方式one-to-one control mode 一次电流primary current一次电压primary voltage二次电流secondary current二次电压secondary voltage低压电器low voltage apparatus额定工作电压rated operational voltage额定工作电流rated operational current运行管理operation management安全方案safety concept外部条件external conditions失效failure故障fault控制柜control cabinet冗余技术redundancy正常关机normal shutdown失效-安全fail-safe排除故障clearance空转idling外部动力源external power supply锁定装置locking device运行转速范围operating rotational speed range 临界转速activation rotational speed最大转速maximum rotational speed过载功率over power临界功率activation power最大功率maximum power短时切出风速short-term cut-out wind speed外联机试验field test with turbine试验台test-bed台架试验test on bed防雷系统lighting protection system外部防雷系统external lighting protection system 内部防雷系统internal lighting protection system 等电位连接equipotential bonding接闪器air-termination system引下线down-conductor接地装置earth-termination system接地线earth conductor接地体earth electrode环形接地体ring earth external基础接地体foundation earth electrode等电位连接带bonding bar等电位连接导体bonding conductor保护等级protection lever防雷区lighting protection zone雷电流lighting current电涌保护器surge suppressor共用接地系统common earthing system接地基准点earthing reference points持续运行continuous operation持续运行的闪变系数flicker coefficient for continuous operation 闪变阶跃系数flicker step factor最大允许功率maximum permitted最大测量功率maximum measured power电网阻抗相角network impedance phase angle正常运行normal operation功率采集系统power collection system额定现在功率rated apparent power额定电流rated current额定无功功率rated reactive power停机standstill起动start-up切换运行switching operation扰动强度turbulence intensity电压变化系数voltage change factor风力发电机端口wind turbine terminals风力发电机最大功率maximum power of wind turbine风力发电机停机parked wind turbine安全系统safety system控制装置control device额定载荷rated load周期period相位phase频率frequency谐波harmonics瞬时值instantaneous value同步synchronism振荡oscillation共振resonance波wave辐射radiation衰减attenuation阻尼damping畸变distortion电electricity电的electric静电学electrostatics电荷electric charge电压降voltage drop电流electric current导电性conductivity电压voltage电磁感应electromagnetic induction励磁excitation电阻率resistivity导体conductor半导体semiconductor电路electric circuit串联电路series circuit电容capacitance电感inductance电阻resistance电抗reactance阻抗impedance传递比transfer ratio交流电压alternating voltage交流电流alternating current脉动电压pulsating voltage脉动电流pulsating current直流电压direct voltage直流电流direct current瞬时功率instantaneous power有功功率active power无功功率reactive power有功电流active current无功电流reactive current功率因数power factor中性点neutral point相序sequential order of the phase电气元件electrical device接线端子terminal电极electrode地earth接地电路earthed circuit接地电阻resistance of an earthed conductor 绝缘子insulator绝缘套管insulating bushing母线busbar线圈coil螺纹管solenoid绕组winding电阻器resistor电感器inductor电容器capacitor继电器relay电能转换器electric energy transducer电机electric machine发电机generator电动机motor变压器transformer变流器converter变频器frequency converter整流器rectifier逆变器inverter传感器sensor耦合器electric coupling放大器amplifier振荡器oscillator滤波器filter半导体器件semiconductor光电器件photoelectric device 触头contact开关设备switchgear控制设备control gear闭合电路closed circuit断开电路open circuit通断switching联结connection串联series connection并联parallel connection星形联结star connection三角形联结delta connection主电路main circuit辅助电路auxiliary circuit控制电路control circuit信号电路signal circuit保护电路protective circuit换接change-over circuit换向commutation输入功率input power输入input输出output负载load加载to load充电to charge放电to discharge有载运行on-load operation空载运行no-load operation开路运行open-circuit operation 短路运行short-circuit operation满载full load效率efficiency损耗loss过电压over-voltage过电流over-current欠电压under-voltage特性characteristic绝缘物insulant隔离to isolate绝缘insulation绝缘电阻insulation resistance品质因数quality factor泄漏电流leakage current闪烙flashover短路short circuit噪声noise极限值limiting value额定值rated value额定rating环境条件environment condition 使用条件service condition工况operating condition额定工况rated condition负载比duty ratio绝缘比insulation ratio介质试验dielectric test常规试验routine test抽样试验sampling test验收试验acceptance test投运试验commissioning test维护试验maintenance test加速accelerating特性曲线characteristic额定电压rated voltage额定电流rated current额定频率rated frequency温升temperature rise温度系数temperature coefficient 端电压terminal voltage短路电流short circuit current可靠性reliability有效性availability耐久性durability维修maintenance维护preventive maintenance工作时间operating time待命时间standby time修复时间repair time寿命life使用寿命useful life平均寿命mean life耐久性试验endurance test寿命试验life test可靠性测定试验reliability determination test 现场可靠性试验field reliability test加速试验accelerated test安全性fail safe应力stress强度strength试验数据test data现场数据field data电触头electrical contact主触头main contact击穿breakdown耐电压proof voltage放电electrical discharge透气性air permeability电线电缆electric wire and cable电力电缆power cable通信电缆telecommunication cable油浸式变压器oil-immersed type transformer 干式变压器dry-type transformer自耦变压器auto-transformer有载调压变压器transformer fitted with OLTC 空载电流non-load current阻抗电压impedance voltage电抗电压reactance voltage电阻电压resistance voltage分接tapping配电电器distributing apparatus控制电器control apparatus开关switch熔断器fuse断路器circuit breaker控制器controller接触器contactor机械寿命mechanical endurance电气寿命electrical endurance旋转电机electrical rotating machine直流电机direct current machine交流电机alternating current machine同步电机synchronous machine异步电机asynchronous machine感应电机induction machine励磁机exciter饱和特性saturation characteristic开路特性open-circuit characteristic负载特性load characteristic短路特性short-circuit characteristic额定转矩rated load torque规定的最初起动转矩specifies breakaway torque交流电动机的最初起动电流breakaway starting current if an a.c. 同步转速synchronous speed转差率slip短路比short-circuit ratio同步系数synchronous coefficient空载no-load系统system触电；电击electric block正常状态normal condition接触电压touch voltage跨步电压step voltage对地电压voltage to earth触电电流shock current残余电流residual current安全阻抗safety impedance安全距离safety distance安全标志safety marking安全色safety color中性点有效接地系统system with effectively earthed neutral检修接地inspection earthing工作接地working earthing保护接地protective earthing重复接地iterative earth故障接地fault earthing过电压保护over-voltage protection过电流保护over-current protection断相保护open-phase protection防尘dust-protected防溅protected against splashing防滴protected against dropping water防浸水protected against the effects of immersion过电流保护装置over-current protective device保护继电器protective relay接地开关earthing switch漏电断路器residual current circuit-breaker灭弧装置arc-control device安全隔离变压器safety isolating transformer避雷器surge attester ; lightning arrester保护电容器capacitor for voltage protection安全开关safety switch限流电路limited current circuit振动vibration腐蚀corrosion点腐蚀spot corrosion金属腐蚀corrosion of metals化学腐蚀chemical corrosion贮存storage贮存条件storage condition运输条件transportation condition空载最大加速度maximum bare table acceletation 电力金具悬垂线夹suspension clamp耐张线夹strain clamp挂环link挂板clevis球头挂环ball-eye球头挂钩ball-hookU型挂环shackleU型挂钩U-bolt联板yoke plate牵引板towing plate挂钩hook吊架hanger调整板adjusting plate花篮螺栓turn buckle接续管splicing sleeve补修管repair sleeve调线线夹jumper clamp防振锤damper均压环grading ring屏蔽环shielding ring间隔棒spacer重锤counter weight线卡子guy clip心形环thimble设备线夹terminal connectorT形线夹T-connector硬母线固定金具bus-bar support 母线间隔垫bus-bar separetor母线伸缩节bus-bar expansion外光检查visual ins振动试验vibration tests老化试验ageing tests冲击动载荷试验impulse load tests 耐腐试验corrosion resistance tests 棘轮扳手ratchet spanner专用扳手special purpose spanner 万向套筒扳手flexible pliers可调钳adjustable pliers夹线器conductor holder电缆剪cable cutter卡线钳conductor clamp单卡头single clamp双卡头double clamp安全帽safety helmet安全带safety belt绝缘手套insulating glove绝缘靴insulating boots护目镜protection spectacles缝焊机seam welding machine。
风力发电机论文中英文对照资料外文翻译文献
中英文对照资料外文翻译文献为电力设计并研制三分之一比例的垂直轴风力发电机摘要：本文通过对风力涡轮机技术测量风速的研究来阐述马来西亚的发电技术。
测量超过三分之一比例的原型垂直轴风力发电机的风速，其主要目的是预测全尺寸H型垂直轴风力涡轮机的性能。
风力发电机产生的电力受发电机的两个主要部分的影响：风力发电和皮带传动系统。
叶片、阻力区系统和皮带传动系统决定转化成电力的风力能，转化成电力的风受叶片、阻力区系统和皮带传送系统的影响。
本文主要研究风力和皮带传送系统的影响。
塞格林工业大学热工学系实验室为这个三分之一规模的风力发电机组设计了一套叶片和拖动装置。
风力发电机组分别进行5.89米/秒、6.08米/秒和7.02米/秒的风速测试。
从实验中计算出风力分别为132.19W，145.40W和223.80W。
目前的研究正在探索最大风力。
关键词：皮带传送系统；雷诺数；风力；风力发电机组引言：风能是一种动能，与大气运动密切相关。
它已被用于航行船、磨粮食、灌溉数百年，风力发电系统将动能转化为更加有用其他形式的能量，自古以来风力发电系统就被应用在灌溉、磨坊中；自20世纪初，它就开始被用来发电，许多国家尤其在农村地区都安装了水抽水风车。
风轮机是一台把风的动能转换成旋转机械能的机器，然后被用来工作，在更先进的机型里旋转机械能通过发电机被转换成电能，这是能量最通用的形式（菲茨沃特等，1996）。
几千年来，人们利用风车抽水或磨粮食，即使进入二十世纪，身材高大、苗条、多叶片完全由金属制成的风力发电机也已经进入美国家庭和牧场将水抽到房子的管道系统或牲畜的饮水槽，第一次世界大战后，主要的工作是开始发展可以产生电力的风力涡轮机，马塞勒斯雅各布在1927年发明了一种可以为收音机和一些灯提供能量的原型，但仅仅如此。
当电力需求增加后，Jacobs的小型的有不足的风力发电机开始不用。
第一个大型风力涡轮机由帕尔默考斯莱特普特南在1934年美国建立起构思的，完成于1941年。
有关风力发电的外文文献翻译
大型风力发电对电力系统稳定性的影响Ch. Eping, J. Stenzel电力系统研究所TU DarmstadtLandgraf-Georg-Stra¼e 464283 Darmstadt/德国e-mail：*********************************.de********************************.deM. PÄoller, HMÄullerDIgSILENT GmbHHeinrich-Hertz-Stra¼e 972810 Gomaringen /德国e-mail:*******************************************摘要近年来，风力发电量不断增加，对电力系统的安全性和系统运行的影响也不断增加。
因此，最近在不同的国家已经进行一些风电影响的研究了。
这些研究的结果通常会涉及到不同的风力发电方面，如波动性，分布式风电场发电机技术，发电机控制等和后备并网预测，其他储备的要求等等。
本文重点对影响暂态稳定问题的几个方面进行分析，像发电机技术，连接点，分布式发电等对暂态稳定方面的影响分别进行了透彻分析。
1引言风力发电的重要性日益增加，特别在许多欧洲国家、美国、加拿大、和澳大利亚。
这要求风力发电对电力系统稳定性的影响进行详细分析。
因此，最近已经进行了所需的一些网络加固，资金准备要求，目前正在开展风力发电对电力系统稳定性影响的研究（如[2]）。
这些研究处理与风力发电有关的几个不同的方面，如波动性风电，当地风力资源，各种发电机技术和发电机控制。
结果大致是，不同的风力发电方面的共同并网和并网后备预测，额外的储备要求，对电力系统稳定性的影响等，但是很难的解决遇到的问题和所需的系统升级，因为要同时进行大量各种方面的研究。
本文的目的是分析和理解，而不是实际的数字和计算。
这次调查的是暂态稳定现象，特别是暂态稳定长距离输电的限制。
风力发电中英文对照外文翻译文献
中英文资料对照外文翻译水平轴风力发电机性能过渡，湍流和偏航的影响摘要最近出示的是改善的功能改善的混合动力车的的水平轴风力涡轮机（HAWT）配置Navier-Stokes势流建模方法。
研究的重点在三个问题上：湍流模型和转换模型，预测转子规定性能唤醒状态以及非轴向流（偏航）发电的影响，比较转子在国家可再生能源实验室（NREL）的测试与测量数据.简介水平轴风力涡轮机空气动力学的计算研究工作是在佐治亚理工学院进行。
本研究着重于了解影响风力涡轮机在非轴向和非均匀流入的流动机制的性能，也解决了高效的计算技术的发展，以补充现有的联合叶片元素动量理论方法。
这项工作是一个扩展的3-D的混合Navier-Stokes/potential流动求解，并已在佐治亚理工学院的水平轴风力发电机（HAWT）进行改善。
在这种方法中的三维非定常可压缩Navier-Stokes方程的解决只能在周围的转子叶片上的贴体网格这片一个很小的区域，。
远离叶片的和潜在的流动方程需要从叶片脱落的涡模拟涡细丝涡留下的Navier-Stokes地区的求解。
这些细丝自由对流的地方流动。
由于复杂的Navier-Stokes方程的计算只在附近的风力涡轮机叶片的地区，因此跟踪的涡利用拉格朗日方法，这是更有效的Navier-Stokes方程的方法级。
基本的Navier-Stokes方程混合势流的方法和其应用程序HAWT下轴流条件的记录在AIAA-99-0042（徐和Sankar，1999年）.本研究范围本文介绍了近期的流动求解的增强功能和应用程序配置的兴趣。
增强集中在以下三个方面：过渡和湍流模型，物理一致唤醒建模，建模的偏航效果。
下文简要讨论这三个领域。
过渡和湍流的建模问题：研究两种湍流模型和两个过渡模型的预测性能影响的进行评估。
一个显示Spalart-Allmaras湍流方程湍流模型（书珥等，1998），另一个对基线鲍德温 - 洛马克斯零方程湍流模型进行了研究。
风力发电机用专业英语中文对照全
风力发电机用专业英语中文对照风力机wind turbine风电场wind power station wind farm风力发电机组wind turbine generator system WTGS水平轴风力机horizontal axis wind turbine垂直轴风力机vertical axis wind turbine轮毂（风力机）hub (for wind turbine)机舱nacelle支撑结构support structure for wind turbine关机shutdown for wind turbine正常关机normal shutdown for wind turbine紧急关机emergency shutdown for wind turbine空转idling锁定blocking停机parking静止standstill制动器brake停机制动parking brake风轮转速rotor speed控制系统control system保护系统protection system偏航yawing设计和安全参数design situation设计工况design situation载荷状况load case外部条件external conditions设计极限design limits极限状态limit state使用极限状态serviceability limit states极限限制状态ultimate limit state最大极限状态ultimate limit state安全寿命safe life严重故障catastrophic failure潜伏故障latent fault dormant failure风特性wind characteristic风速wind speed风矢量wind velocity旋转采样风矢量rotationally sampled wind velocity额定风速rated wind speed切入风速cut-in speed切出风速cut-out speed年平均annual average年平均风速annual average wind speed平均风速mean wind speed极端风速extreme wind speed安全风速survival wind speed参考风速reference wind speed风速分布wind speed distribution瑞利分布RayLeigh distribution威布尔分布Weibull distribution风切变wind shear风廓线风切变律wind profile wind shear law风切变指数wind shear exponent对数风切变律logarithmic wind shear law风切变幂律power law for wind shear下风向down wind上风向up wind阵风gust粗糙长度roughness length湍流强度turbulence intensity湍流尺度参数turbulence scale parameter湍流惯性负区inertial sub-range风场wind site测量参数measurement parameters测量位置measurement seat最大风速maximum wind speed风功率密度wind power density风能密度wind energy density日变化diurnal variation年变化annual variation轮毂高度hub height风能wind energy标准大气状态standard atmospheric state风切变影响influence by the wind shear阵风影响gust influence风速频率frequency of wind speed环境environment工作环境operational environment气候climate海洋性气候ocean climate大陆性气候continental climate露天气候open-air climate室内气候indoor climate极端extreme日平均值daily mean极端最高extreme maximum年最高annual maximum年最高日平均温度annual extreme daily mean of temperature月平均温度mean monthly temperature 空气湿度air humidity绝对湿度absolute humidity相对湿度relative humidity降水precipitation雨rain冻雨freezing rain霜淞rime雨淞glaze冰雹hail露dew雾fog盐雾salt fog雷暴thunderstorm雪载snow load标准大气压standard air pressure平均海平面mean sea level海拔altitude辐射通量radiant flux太阳辐射solar radiation直接太阳辐射direct solar radiation天空辐射sky radiation太阳常数solar constant太阳光谱solar spectrum黑体black body白体white body温室效应greenhouse effect环境温度ambient temperature表面温度surface temperature互联interconnection输出功率output power额定功率rated power最大功率maximum power电网连接点network connection point电力汇集系统power collection system风场电器设备site electrical facilities功率特性power performance静电功率输出net electric power output 功率系数power performance自由流风速free stream wind speed扫掠面积swept area轮毂高度hub height测量功率曲线measurement power curve 外推功率曲线extrapolated power curve 年发电量annual energy production可利用率availability数据组功率特性测试data set for power performance measurement 精度accuracy测量误差uncertainty in measurement分组方法method of bins测量周期measurement period测量扇区measurement sector日变化diurnal variations浆距角pitch angle距离常数distance constant试验场地test site气流畸变flow distortion障碍物obstacles复杂地形带complex terrain风障wind break声压级sound pressure level声级weighted sound pressure level; sound level视在声功率级apparent sound power level指向性directivity音值tonality声的基准面风速acoustic reference wind speed标准风速standardized wind speed基准高度reference height基准粗糙长度reference roughness length基准距离reference distance掠射角grazing angle风轮wind rotor风轮直径rotor diameter风轮扫掠面积rotor swept area风轮仰角tilt angle of rotor shaft风轮偏航角yawing angle of rotor shaft风轮额定转速rated turning speed of rotor风轮最高转速maximum turning speed of rotor风轮尾流rotor wake尾流损失wake losses风轮实度rotor solidity实度损失solidity losses叶片数number of blades叶片blade等截面叶片constant chord blade变截面叶片variable chord blade叶片投影面积projected area of blade叶片长度length of blade叶根root of blade叶尖tip of blade叶尖速度tip speed浆距角pitch angle翼型airfoil前缘leading edge后缘tailing edge几何弦长geometric chord of airfoil平均几何弦长mean geometric of airfoil气动弦线aerodynamic chord of airfoil翼型厚度thickness of airfoil翼型相对厚度relative thickness of airfoil厚度函数thickness function of airfoil中弧线mean line弯度degree of curvature翼型族the family of airfoil弯度函数curvature function of airfoil叶片根梢比ratio of tip-section chord to root-section chord叶片展弦比aspect ratio叶片安装角setting angle of blade叶片扭角twist of blade叶片几何攻角angle of attack of blade叶片损失blade losses叶尖损失tip losses颤振flutter迎风机构orientation mechanism调速机构regulating mechanism风轮偏测式调速机构regulating mechanism of turning wind rotor out of the wind sideward 变浆距调速机构regulating mechanism by adjusting the pitch of blade整流罩nose cone顺浆feathering阻尼板spoiling flap风轮空气动力特性aerodynamic characteristics of rotor叶尖速度比tip-speed ratio额定叶尖速度比rated tip-speed ratio升力系数lift coefficient阻力系数drag coefficient推或拉力系数thrust coefficient偏航系统滑动制动器sliding shoes偏航yawing主动偏航active yawing被动偏航passive yawing偏航驱动yawing driven解缆untwist塔架tower独立式塔架free stand tower拉索式塔架guyed tower塔影响效应influence by the tower shadow功率特性测试功率特性power performance净电功率输出net electric power output功率系数power coefficient自由流风速free stream wind speed扫掠面积swept area测量功率曲线measured power curve外推功率曲线extrapolated power curve年发电量annual energy production数据组data set可利用率availability精度accuracy测量误差uncertainty in measurement分组方法method of bins测量周期measurement period测量扇区measurement sector距离常数distance constant试验场地test site气流畸变flow distortion复杂地形地带complex terrain风障wind break声压级sound pressure level声级weighted sound pressure level视在声功率级apparent sound power level指向性directivity音值tonality声的基准风速acoustic reference wind speed标准风速standardized wind speed基准高度reference height基准粗糙长度reference roughness基准距离reference distance掠射角grazing angle比恩法method of bins标准误差standard uncertainty风能利用系数rotor power coefficient力矩系数torque coefficient额定力矩系数rated torque coefficient起动力矩系数starting torque coefficient最大力矩系数maximum torque coefficient过载度ratio of over load风力发电机组输出特性output characteristic of WTGS调节特性regulating characteristics平均噪声average noise level机组效率efficiency of WTGS使用寿命service life度电成本cost per kilowatt hour of the electricity generated by WTGS 发电机同步电机synchronous generator异步电机asynchronous generator感应电机induction generator转差率slip瞬态电流transient rotor笼型cage绕线转子wound rotor绕组系数winding factor换向器commutator集电环collector ring换向片commutator segment励磁响应excitation response制动系统制动系统braking制动机构brake mechanism正常制动系normal braking system紧急制动系emergency braking system空气制动系air braking system液压制动系hydraulic braking system电磁制动系electromagnetic braking system机械制动系mechanical braking system辅助装置auxiliary device制动器释放braking releasing制动器闭合brake setting液压缸hydraulic cylinder溢流阀relief valve泻油drain齿轮马达gear motor齿轮泵gear pump电磁阀solenoid液压过滤器hydraulic filter液压泵hydraulic pump液压系统hydraulic system油冷却器oil cooler压力控制器pressure control valve压力继电器pressure switch减压阀reducing valve安全阀safety valve设定压力setting pressure切换switching旋转接头rotating union压力表pressure gauge液压油hydraulic fluid液压马达hydraulic motor油封oil seal刹车盘brake disc闸垫brake pad刹车油brake fluid闸衬片brake lining传动比transmission ratio齿轮gear齿轮副gear pair平行轴齿轮副gear pair with parallel axes齿轮系train of gears行星齿轮系planetary gear train小齿轮pinion大齿轮wheel , gear主动齿轮driving, gear从动齿轮driven gear行星齿轮planet gear行星架planet carrier太阳轮sun gear内齿圈ring gear外齿轮external gear内齿轮internal内齿轮副internal gear pair增速齿轮副speed increasing gear增速齿轮系speed increasing gear train中心距center distance增速比speed increasing ratio齿面tooth flank工作齿面working flank非工作齿面non-working flank模数module齿数number of teeth啮合干涉meshing interference齿廓修行profile modification , profile correction 啮合engagement, mesh齿轮的变位addendum modification on gears变位齿轮gears with addendum modification圆柱齿轮cylindrical gear直齿圆柱齿轮spur gear斜齿圆柱齿轮helical gear single-helical gear节点pitch point节圆pitch circle齿顶圆tip circle齿根圆root circle直径和半径diameter and radius齿宽face width齿厚tooth thickness压力角pressure angle圆周侧隙circumferential backlash蜗杆worm蜗轮worm wheel联轴器coupling刚性联轴器rigid coupling万向联轴器universal coupling安全联轴器security coupling齿tooth齿槽tooth space斜齿轮helical gear人字齿轮double-helical gear齿距pitch法向齿距normal pitch轴向齿距axial pitch齿高tooth depth输入角input shaft输出角output shaft柱销pin柱销套roller行星齿轮传动机构planetary gear drive mechanism 中心轮center gear单级行星齿轮系single planetary gear train柔性齿轮flexible gear刚性齿轮rigidity gear柔性滚动轴承flexible rolling bearing输出联接output coupling刚度rigidity扭转刚度torsional rigidity弯曲刚度flexural rigidity扭转刚度系数coefficient of torsional起动力矩starting torque传动误差transmission error传动精度transmission accuracy固有频率natural frequency弹性联接elastic coupling刚性联接rigid coupling滑块联接Oldham coupling固定联接integrated coupling齿啮式联接dynamic coupling花键式联接splined coupling牙嵌式联接castellated coupling径向销联接radial pin coupling周期振动periodic vibration随机振动random vibration峰值peak value临界阻尼critical damping阻尼系数damping coefficient阻尼比damping ratio减震器vibration isolator振动频率vibration frequency幅值amplitude位移幅值displacement amplitude速度幅值velocity amplitude加速度幅值acceleration amplitude控制与监控系统远程监视telemonitoring协议protocol实时real time单向传输simplex transmission半双工传输half-duplex transmission双工传输duplex transmission前置机front end processor运输终端remote terminal unit调制解调器modulator-demodulator数据终端设备data terminal equipment接口interface数据电路data circuit信息information状态信息state information分接头位置信息tap position information监视信息monitored information设备故障信息equipment failure information告警alarm返回信息return information设定值set point value累积值integrated total integrated value瞬时测值instantaneous measured计量值counted measured metered measured metered reading 确认acknowledgement信号signal模拟信号analog signal命令command字节byte位bit地址address波特baud编码encode译码decode代码code集中控制centralized control可编程序控制programmable control微机程控minicomputer program模拟控制analogue control数字控制digital control强电控制strong current control弱电控制weak current control单元控制unit control就地控制local control联锁装置interlocker模拟盘analogue board配电盘switch board控制台control desk紧急停车按钮emergency stop push-button 限位开关limit switch限速开关limit speed switch有载指示器on-load indicator屏幕显示screen display指示灯display lamp起动信号starting signal公共供电点point of common coupling闪变flicker数据库data base硬件hardware硬件平台hardware platform层layer level class模型model响应时间response time软件software软件平台software platform系统软件system software自由脱扣trip-free基准误差basic error一对一控制方式one-to-one control mode 一次电流primary current一次电压primary voltage二次电流secondary current二次电压secondary voltage低压电器low voltage apparatus额定工作电压rated operational voltage额定工作电流rated operational current运行管理operation management安全方案safety concept外部条件external conditions失效failure故障fault控制柜control cabinet冗余技术redundancy正常关机normal shutdown失效-安全fail-safe排除故障clearance空转idling外部动力源external power supply锁定装置locking device运行转速范围operating rotational speed range 临界转速activation rotational speed最大转速maximum rotational speed过载功率over power临界功率activation power最大功率maximum power短时切出风速short-term cut-out wind speed外联机试验field test with turbine试验台test-bed台架试验test on bed防雷系统lighting protection system外部防雷系统external lighting protection system 内部防雷系统internal lighting protection system 等电位连接equipotential bonding接闪器air-termination system引下线down-conductor接地装置earth-termination system接地线earth conductor接地体earth electrode环形接地体ring earth external基础接地体foundation earth electrode等电位连接带bonding bar等电位连接导体bonding conductor保护等级protection lever防雷区lighting protection zone雷电流lighting current电涌保护器surge suppressor共用接地系统common earthing system接地基准点earthing reference points持续运行continuous operation持续运行的闪变系数flicker coefficient for continuous operation 闪变阶跃系数flicker step factor最大允许功率maximum permitted最大测量功率maximum measured power电网阻抗相角network impedance phase angle正常运行normal operation功率采集系统power collection system额定现在功率rated apparent power额定电流rated current额定无功功率rated reactive power停机standstill起动start-up切换运行switching operation扰动强度turbulence intensity电压变化系数voltage change factor风力机端口wind turbine terminals风力机最大功率maximum power of wind turbine风力机停机parked wind turbine安全系统safety system控制装置control device额定载荷rated load周期period相位phase频率frequency谐波harmonics瞬时值instantaneous value同步synchronism振荡oscillation共振resonance波wave辐射radiation衰减attenuation阻尼damping畸变distortion电electricity电的electric静电学electrostatics电荷electric charge电压降voltage drop电流electric current导电性conductivity电压voltage电磁感应electromagnetic induction励磁excitation电阻率resistivity导体conductor半导体semiconductor电路electric circuit串联电路series circuit电容capacitance电感inductance电阻resistance电抗reactance阻抗impedance传递比transfer ratio交流电压alternating voltage交流电流alternating current脉动电压pulsating voltage脉动电流pulsating current直流电压direct voltage直流电流direct current瞬时功率instantaneous power有功功率active power无功功率reactive power有功电流active current无功电流reactive current功率因数power factor中性点neutral point相序sequential order of the phase电气元件electrical device接线端子terminal电极electrode地earth接地电路earthed circuit接地电阻resistance of an earthed conductor 绝缘子insulator绝缘套管insulating bushing母线busbar线圈coil螺纹管solenoid绕组winding电阻器resistor电感器inductor电容器capacitor继电器relay电能转换器electric energy transducer电机electric machine发电机generator电动机motor变压器transformer变流器converter变频器frequency converter整流器rectifier逆变器inverter传感器sensor耦合器electric coupling放大器amplifier振荡器oscillator滤波器filter半导体器件semiconductor光电器件photoelectric device 触头contact开关设备switchgear控制设备control gear闭合电路closed circuit断开电路open circuit通断switching联结connection串联series connection并联parallel connection星形联结star connection三角形联结delta connection主电路main circuit辅助电路auxiliary circuit控制电路control circuit信号电路signal circuit保护电路protective circuit换接change-over circuit换向commutation输入功率input power输入input输出output负载load加载to load充电to charge放电to discharge有载运行on-load operation空载运行no-load operation开路运行open-circuit operation 短路运行short-circuit operation 满载full load效率efficiency损耗loss过电压over-voltage过电流over-current欠电压under-voltage特性characteristic绝缘物insulant隔离to isolate绝缘insulation绝缘电阻insulation resistance品质因数quality factor泄漏电流leakage current闪烙flashover短路short circuit噪声noise极限值limiting value额定值rated value额定rating环境条件environment condition 使用条件service condition工况operating condition额定工况rated condition负载比duty ratio绝缘比insulation ratio介质试验dielectric test常规试验routine test抽样试验sampling test验收试验acceptance test投运试验commissioning test维护试验maintenance test加速accelerating特性曲线characteristic额定电压rated voltage额定电流rated current额定频率rated frequency温升temperature rise温度系数temperature coefficient 端电压terminal voltage短路电流short circuit current可靠性reliability有效性availability耐久性durability维修maintenance维护preventive maintenance工作时间operating time待命时间standby time修复时间repair time寿命life使用寿命useful life平均寿命mean life耐久性试验endurance test寿命试验life test可靠性测定试验reliability determination test 现场可靠性试验field reliability test加速试验accelerated test安全性fail safe应力stress强度strength试验数据test data现场数据field data电触头electrical contact主触头main contact击穿breakdown耐电压proof voltage放电electrical discharge透气性air permeability电线电缆electric wire and cable电力电缆power cable通信电缆telecommunication cable油浸式变压器oil-immersed type transformer 干式变压器dry-type transformer自耦变压器auto-transformer有载调压变压器transformer fitted with OLTC 空载电流non-load current阻抗电压impedance voltage电抗电压reactance voltage电阻电压resistance voltage分接tapping配电电器distributing apparatus控制电器control apparatus开关switch熔断器fuse断路器circuit breaker控制器controller接触器contactor机械寿命mechanical endurance电气寿命electrical endurance旋转电机electrical rotating machine直流电机direct current machine交流电机alternating current machine同步电机synchronous machine异步电机asynchronous machine感应电机induction machine励磁机exciter饱和特性saturation characteristic开路特性open-circuit characteristic负载特性load characteristic短路特性short-circuit characteristic额定转矩rated load torque规定的最初起动转矩specifies breakaway torque交流电动机的最初起动电流breakaway starting current if an a.c. 同步转速synchronous speed转差率slip短路比short-circuit ratio同步系数synchronous coefficient空载no-load系统system触电；电击electric block正常状态normal condition接触电压touch voltage跨步电压step voltage对地电压voltage to earth触电电流shock current残余电流residual current安全阻抗safety impedance安全距离safety distance安全标志safety marking安全色safety color中性点有效接地系统system with effectively earthed neutral检修接地inspection earthing工作接地working earthing保护接地protective earthing重复接地iterative earth故障接地fault earthing过电压保护over-voltage protection过电流保护over-current protection断相保护open-phase protection防尘dust-protected防溅protected against splashing防滴protected against dropping water防浸水protected against the effects of immersion过电流保护装置over-current protective device保护继电器protective relay接地开关earthing switch漏电断路器residual current circuit-breaker灭弧装置arc-control device安全隔离变压器safety isolating transformer避雷器surge attester ; lightning arrester保护电容器capacitor for voltage protection安全开关safety switch限流电路limited current circuit振动vibration腐蚀corrosion点腐蚀spot corrosion金属腐蚀corrosion of metals化学腐蚀chemical corrosion贮存storage贮存条件storage condition运输条件transportation condition空载最大加速度maximum bare table acceletation 电力金具悬垂线夹suspension clamp耐张线夹strain clamp挂环link挂板clevis球头挂环ball-eye球头挂钩ball-hookU型挂环shackleU型挂钩U-bolt联板yoke plate牵引板towing plate挂钩hook吊架hanger调整板adjusting plate花篮螺栓turn buckle接续管splicing sleeve补修管repair sleeve调线线夹jumper clamp防振锤damper均压环grading ring屏蔽环shielding ring间隔棒spacer重锤counter weight线卡子guy clip心形环thimble设备线夹terminal connectorT形线夹T-connector硬母线固定金具bus-bar support母线间隔垫bus-bar separetor母线伸缩节bus-bar expansion外光检查visual ins振动试验vibration tests老化试验ageing tests冲击动载荷试验impulse load tests 耐腐试验corrosion resistance tests 棘轮扳手ratchet spanner专用扳手special purpose spanner 万向套筒扳手flexible pliers可调钳adjustable pliers夹线器conductor holder电缆剪cable cutter卡线钳conductor clamp单卡头single clamp双卡头double clamp安全帽safety helmet安全带safety belt绝缘手套insulating glove绝缘靴insulating boots护目镜protection spectacles缝焊机seam welding machine。
外文翻译---风电对电力系统角稳定性的影响
毕业设计(论文)外文资料翻译学院：机械工程学院专业：机械设计制造及其自动化姓名：学号：外文出处： Impact of Wind Power on the(用外文写)Angular Stability of a PowerSystem附件： 1.外文资料翻译译文；2.外文原文。
附件1：外文资料翻译译文风电对电力系统角稳定性的影响摘要风能转换系统是非常不同的性质与传统发电机组。
因此，动态研究必须加以解决，以便将风力为动力系统。
角稳定评估风力发电机是一个主要问题在电力系统安全运行。
角稳定的风力发电机是由其相应的临界清除时间（建）。
在本文中，风力的作用对故障暂态行为调查取代产生2种类型的风力发电机，风力逐渐增加的速度渗透和改变位置的风力资源。
仿真分析是建立在14总线测试系统的软件/，这使获得一个广泛的网格组件，以及相关的风力机模型。
关键词：角稳定性，横向，风机，风渗透。
引言电力网络是一个复杂的系统，这是容易受到干扰。
瞬态短路故障是一个非常常见的干扰功率系统。
它会在转子附近产生故障，导致这些机器的转速和功率在网络中振荡。
当短路清除断开故障，发电机，加速将减速，回到同步与其他系统。
如果他们不这样做，并使系统变得不稳定，有可能广泛停电和造成机械性损坏发电机。
因此，临界清除时间是最大的时间间隔，故障必须清除，以维护系统的稳定性。
毫无疑问的是，风力将发挥主导作用，增加国家电网的清洁无污染能源。
然而，随着越来越多的风力发电机连接到电网，其影响的电能质量服务人类与生产是越来越明显，所以重要的是分析电力系统的暂态稳定性，包括风力发电站。
三相故障应用到14个总线测试系统，通过断开和清除影响线。
本文的重点是：以确定临界清除时间（横向）的若干情况下观察运输行为仿真测试系统在电网故障期间使用的电力系统分析工具箱（部分）。
本文的结构如下。
首先，风模型描述也；风机的概念描述。
然后，测试系统和应用模型的提出。
振荡的一组发电机故障暂态行为分析观察下列情况：风模型：风能转化为机械能，通过一个风力涡轮的旋转传递给发电机采用机械传动装置。
毕业论文风力发电机技术参考文献外文
Wind Power Generation TechnologyWind is very important and reserves of energy, it is safe, clean, and can provide abundant energy, stability of the stream. Now, use wind power has become the main form of wind, the world's attention, and the fastest.Wind energy technology is a high-tech; it relates more than a dozen of subjects, including meteorology,aerodynamics, structural mechanics, computer technology, electronic control technology,material science,chemistry, electrical engineering, electrical engineering, so the difficulty of a system technology may beyond the difficulty of space technology. First, The division of wind energy technologies:Wind energy technology is divided into large-scale wind power technology and small and medium sized wind power technology, although both are wind energy technology, working principles are the same, the two industries are completely different: specific performance of the "policy orientation is different in different markets, different applications, applied technology is different, totally belong to the same kinds of industries in the two sectors. Therefore, in China machinery industry meeting on the wind to large wind power and wind power to distinguish between small and medium treated separately. In addition, to meet different market needs, extending from the wind and solar technology has not only promoted the development of small wind power technology, but also for the small wind power opens up new markets.1. Large-scale wind power technology:The technology of large-scale wind power in China still has a certain gap between international.The technology of large-scale wind power technology originated in Denmark and some other European countries, the wind power industry propelled by the government, because of the local wind resource-rich,large-scale wind power technology and equipment ahead of the international development. Our government has also started to boost the development of large-scale wind power technology, and a range of policies to guide industry development. Large-scale wind power technology are for the large-scale wind turbine design,wind turbine applications for large area on the very strict environmental requirements are applied to limited resources, wind energy resource-rich wind field, to accept a variety of perennial bad environment that something was the complex nature of the environment, high demands on the technology up on the line.Currently large-scale wind power technology in general is not yet ripe, the core technology of large-scale wind power still rely on foreign, national policy guidance to the domestic wind power project launched in various places, like crazy, all overlook forward to slice. Worthy of the name "mad electricity" through the wind began to Negative effect and Precaution policy. Although wind power projects have been started, but more as complementary type, complete with independent intellectual property rights of large-scale wind power systems technology and core technology few. The test environment needs to have been a large-scale wind power technology to mature. In addition, the large-scale wind power generation technology and network technology has also improved a number of issues still restrict the development of large-scale wind power technology.2. The technology of small wind power:The technology of small wind power in China could compare with the international technology.In 1970s, the small wind power technology in China had been developed which has wind resources for a better situation, including Inner Mongolia, Xinjiang areas, the first small wind power technology is widely used in power transmission project to the Township for a one of farmers and herdsmen household power supply, continuously updated as the technology improvement and development, not only alone but also with the combination of complementary optical has been widely used in distributed independent power supply. These years as Chinese exports of small and medium wind steadily. Internationally, China's small and medium sized wind power technology and wind and solar technology have leapt to international leadership.Small wind power technology is mature and relatively small by natural resource constraints, distributed independent power as a significant effect not only connected, but also the formation of more stable and reliable combination of optical complementary technologies scenery Moreover, technology is completely self-localization. Both from a technical or price in the international arena are very competitive; with international has now started a small wind power in China brand; "wall flower wall Hong" has intensified. In the country's most technical advantages and competitiveness of small and medium wind power has always been forgotten by the government and policy in a corner of reasons, in the early states has been to locate the small and medium sized wind power in Inner Mongolia, Xinjiang, farmers and herdsmen in remote areas to use and return into the agricultural class, low cost, shoddy, low-performance reliability, security, no security of land mostly sparsely populated areas, most of the domestic market are subject to loss of reliability of large price war; in people subconsciously form a poor understanding of So get national attention and development.Domestic small wind power technology in the "low wind start, low wind speed generation, pitch moment, multiple protection, and a series of technical attention by the international market and international clientsunanimously approved, has a leading position. Moreover, the small and medium Wind power technology is ultimately distributed independent power supply to meet end-market, rather than large-scale wind power generation and network technologies to meet the domestic monopoly market, technology, update rate must be adapted to a broad and rapidly growing market.3. wind and solar technology:Wind is the integration of technical skills and the Small and Medium Wind Energy Solar Energy Technology, combines a variety of applications of new technology, and it covers many areas, the wide range of applications, technical differentiation is so great that a variety of techniques which can separate match.Wind and solar power is currently the world in the use of new energy technology the most mature, most large-scale and industrial development of the industry, separate and individual solar wind has its drawbacks of development, but both wind and solar power complementary combined to realize the two new configuration of energy in natural resources, the technical programs of integration, performance and price compared to aspects of the new energy source for the most reasonable, not only reduces the demand to meet under the same unit cost and expand the scope of application of the market, also increases the reliability of the product.In addition: solar and wind power are both new energy, solar energy than the wind started to be late more than 30 per solar PV / W by the general public about the price of recognition can be converted to a 15% rate;while the price of small wind power conversion rate is only 1/5-1/6 of the same 60% -80%, only the low price Worse still suppressed, photoelectric production of pollution on the environment greater than wind power, than substantial development in wind energy, this comparison contrast twist of meditation ......, if people use the energy from the point of view, our goal is to meet the electricity from wind power generating capacity to measure the cost of solar energy economy than many .Wind, solar and wind power integration advantages, not only for the "energy saving, emission reduction,"opened up new horizons for the application of science to meet human needs, for the world to open a fourthRevolution.Second，Wind power has three kinds of operation mode:one is independent operation mode, usually a small wind generators to one or a few families to provide power, storage battery energy, to ensure the electricity without wind, Second is the wind turbines and other power mode (such as engine power), combining to aunit or an village or an island power supply, Three is wind power into conventional power operate and to provide electric power grid, is often a wind tens or hundreds of sets installed wind generators, this is the main development direction of wind power.Wind power system in the two main parts is wind machine and generators. Wind turbines to change from adjusting technique, plasma generator toward VSCF technology, this is the development trend of wind power technology is the core technology nowadays wind turbines. The following simple introduction of this two respects.1 the change of wind plasma from regulationWind turbines impeller, will capture the wind by converting wind effects on the mechanical wheeltorque.Change is the change from adjustment with vertical axis wind leaf surface of Angle, thus affecting the force and the blade, when the wind resistance increases, the output power of the fan is kept constant power output. By regulating mode, fan from the output power curve is smooth. In the rated wind leaf Angle of attack,controller will be placed near zero, do not change, approximate distance equal to adjust for pulp. In the rated wind above, variable structure control function from pulp, adjust the blade Angle of attack, the output power control in near ratings. Change from the wind plasma starting from wind speed is set slurry machine downtime at low impact stress relative ease. The normal work, is mainly adopts power control, in practical applications, power and speed is directly proportional to the set. Small changes will cause the wind changes of wind.Due to the change of wind from pulp by adjusting the impact than other wind from small, can reduce material utilization rate, reduce overall weight. And the change of wind from accommodation type at low speed, can make the blades, keep good Angle of attack than accommodation type stall wind turbines have better energy output, therefore is suitable for low average speed of the region.Change from another advantage of regulation, when the winds reach a certain value, stall type of wind and downtime, must from type machine can gradually changes to the wind load without a blades of open mode, avoid wing, increase of wind turbine.Change is to adjust the defect is sensitive response requires gusts. Because the wind accommodation typestall fan vibration power pulse are small, and accommodation type from wind turbines is bigger, especially for the change from the constant speed windmills way, this kind of circumstance, this does not require more obvious change in the fan is the response speed of wind system to fast enough, can reduce this phenomenon.Third, the development of wind energy technology requires constant innovation:At present, China's wind energy development in technological innovation is still very weak, the lack of core technologies with independent intellectual property. Thus, much would import technology from abroad.Although the arrival of knowledge economy era, all countries take full advantage of global resources and international cooperation through the introduction of technology to bridge the gap and improve competitiveness. But if there is no capability of independent innovation, not know what the introduction of advanced technologies, are not able to absorb the future, can not carry out another record, which is on the one hand; on the other hand, the core technology is the introduction of foreign countries cannot, and must be rely on innovation to master the core technology; Moreover, the domestic policy of independent innovation of technology needs to supporting, guiding, supporting, with the core technology of wind energy products to be increasing support, such a "wall flower wall incense" situation can be change, innovation and power can come from constant innovation.In short: the wind power industry continuing to creating in a single generation from wind energy technology to power the various areas of need ,its additional products have emerged such as: street, landscape, traffic control, communication, irrigation, planting, breeding, sea water desalination , fire, alarm, islands, mountains and so on. Shows the development of wind energy in this new industry can be brought aboutnumerous development and transformation of traditional industries, but the application of wind energy technology in various fields has become the industry's benchmark. World revolution will be caused by wind energy technology from the New Energy and Industrial revolution.风力发电技术风能是非常重要并储量巨大的能源，它安全、清洁、充裕，能提供源源不绝，稳定的能源。
风电专用英语介绍
风力发电机用专业英语中文对照风力发电机windturbine风电场windpowerstationwindfarm风力发电机组windturbinegeneratorsystemWTGS水平轴风力发电机horizontalaxiswindturbine垂直轴风力发电机verticalaxiswindturbin风力发电机用专业英语中文对照风力发电机wind turbine风电场wind power station wind farm风力发电机组wind turbine generator system WTGS水平轴风力发电机horizontal axis wind turbine垂直轴风力发电机vertical axis wind turbine轮毂（风力发电机）hub (for wind turbine)机舱nacelle支撑结构support structure for wind turbine关机shutdown for wind turbine正常关机normal shutdown for wind turbine紧急关机emergency shutdown for wind turbine空转idling锁定blocking停机parking静止standstill制动器brake停机制动parking brake风轮转速rotor speed控制系统control system保护系统protection system偏航yawing设计和安全参数design situation设计工况design situation载荷状况load case外部条件external conditions设计极限design limits极限状态limit state使用极限状态serviceability limit states极限限制状态ultimate limit state最大极限状态ultimate limit state安全寿命safe life严重故障catastrophic failure潜伏故障latent fault dormant failure风特性wind characteristic风速wind speed风矢量wind velocity旋转采样风矢量rotationally sampled wind velocity 额定风速rated wind speed切入风速cut-in speed切出风速cut-out speed年平均annual average年平均风速annual average wind speed平均风速mean wind speed极端风速extreme wind speed安全风速survival wind speed参考风速reference wind speed风速分布wind speed distribution瑞利分布RayLeigh distribution威布尔分布Weibull distribution风切变wind shear风廓线风切变律wind profile wind shear law风切变指数wind shear exponent对数风切变律logarithmic wind shear law风切变幂律power law for wind shear下风向down wind上风向up wind阵风gust粗糙长度roughness length湍流强度turbulence intensity湍流尺度参数turbulence scale parameter湍流惯性负区inertial sub-range风场wind site测量参数measurement parameters测量位置measurement seat最大风速maximum wind speed风功率密度wind power density风能密度wind energy density日变化diurnal variation年变化annual variation轮毂高度hub height风能wind energy标准大气状态standard atmospheric state风切变影响influence by the wind shear阵风影响gust influence风速频率frequency of wind speed环境environment工作环境operational environment气候climate海洋性气候ocean climate大陆性气候continental climate露天气候open-air climate室内气候indoor climate极端extreme日平均值daily mean极端最高extreme maximum年最高annual maximum年最高日平均温度annual extreme daily mean of temperature 月平均温度mean monthly temperature空气湿度air humidity绝对湿度absolute humidity相对湿度relative humidity降水precipitation雨rain冻雨freezing rain霜淞rime雨淞glaze冰雹hail露dew雾fog盐雾salt fog雷暴thunderstorm雪载snow load标准大气压standard air pressure平均海平面mean sea level海拔altitude辐射通量radiant flux太阳辐射solar radiation直接太阳辐射direct solar radiation天空辐射sky radiation太阳常数solar constant太阳光谱solar spectrum黑体black body白体white body温室效应greenhouse effect环境温度ambient temperature表面温度surface temperature互联interconnection输出功率output power额定功率rated power最大功率maximum power电网连接点network connection point电力汇集系统power collection system风场电器设备site electrical facilities功率特性power performance静电功率输出net electric power output功率系数power performance自由流风速free stream wind speed扫掠面积swept area轮毂高度hub height测量功率曲线measurement power curve外推功率曲线extrapolated power curve年发电量annual energy production可利用率availability数据组功率特性测试data set for power performance measurement 精度accuracy测量误差uncertainty in measurement分组方法method of bins测量周期measurement period测量扇区measurement sector日变化diurnal variations浆距角pitch angle距离常数distance constant试验场地test site气流畸变flow distortion障碍物obstacles复杂地形带complex terrain风障wind break声压级sound pressure level声级weighted sound pressure level; sound level 视在声功率级apparent sound power level指向性directivity音值tonality声的基准面风速acoustic reference wind speed 标准风速standardized wind speed基准高度reference height基准粗糙长度reference roughness length基准距离reference distance掠射角grazing angle风轮风轮wind rotor风轮直径rotor diameter风轮扫掠面积rotor swept area风轮仰角tilt angle of rotor shaft风轮偏航角yawing angle of rotor shaft风轮额定转速rated turning speed of rotor风轮最高转速maximum turning speed of rotor 风轮尾流rotor wake尾流损失wake losses风轮实度rotor solidity实度损失solidity losses叶片数number of blades叶片blade等截面叶片constant chord blade变截面叶片variable chord blade叶片投影面积projected area of blade叶片长度length of blade叶根root of blade叶尖tip of blade叶尖速度tip speed浆距角pitch angle翼型airfoil前缘leading edge后缘tailing edge几何弦长geometric chord of airfoil平均几何弦长mean geometric of airfoil气动弦线aerodynamic chord of airfoil翼型厚度thickness of airfoil翼型相对厚度relative thickness of airfoil厚度函数thickness function of airfoil中弧线mean line弯度degree of curvature翼型族the family of airfoil弯度函数curvature function of airfoil叶片根梢比ratio of tip-section chord to root-section chord叶片展弦比aspect ratio叶片安装角setting angle of blade叶片扭角twist of blade叶片几何攻角angle of attack of blade叶片损失blade losses叶尖损失tip losses颤振flutter迎风机构orientation mechanism调速机构regulating mechanism风轮偏测式调速机构regulating mechanism of turning wind rotor out of the wind sideward 变浆距调速机构regulating mechanism by adjusting the pitch of blade整流罩nose cone顺浆feathering阻尼板spoiling flap风轮空气动力特性aerodynamic characteristics of rotor叶尖速度比tip-speed ratio额定叶尖速度比rated tip-speed ratio升力系数lift coefficient阻力系数drag coefficient推或拉力系数thrust coefficient偏航系统滑动制动器sliding shoes偏航yawing主动偏航active yawing被动偏航passive yawing偏航驱动yawing driven解缆untwist塔架tower独立式塔架free stand tower拉索式塔架guyed tower塔影响效应influence by the tower shadow <<功率特性测试>>功率特性power performance净电功率输出net electric power output功率系数power coefficient自由流风速free stream wind speed扫掠面积swept area测量功率曲线measured power curve外推功率曲线extrapolated power curve年发电量annual energy production数据组data set可利用率availability精度accuracy测量误差uncertainty in measurement分组方法method of bins测量周期measurement period测量扇区measurement sector距离常数distance constant试验场地test site气流畸变flow distortion复杂地形地带complex terrain风障wind break声压级sound pressure level声级weighted sound pressure level视在声功率级apparent sound power level 指向性directivity音值tonality声的基准风速acoustic reference wind speed 标准风速standardized wind speed基准高度reference height基准粗糙长度reference roughness基准距离reference distance掠射角grazing angle比恩法method of bins标准误差standard uncertainty风能利用系数rotor power coefficient力矩系数torque coefficient额定力矩系数rated torque coefficient起动力矩系数starting torque coefficient最大力矩系数maximum torque coefficient过载度ratio of over load风力发电机组输出特性output characteristic of WTGS调节特性regulating characteristics平均噪声average noise level机组效率efficiency of WTGS使用寿命service life度电成本cost per kilowatt hour of the electricity generated by WTGS 发电机同步电机synchronous generator异步电机asynchronous generator感应电机induction generator转差率slip瞬态电流transient rotor笼型cage绕线转子wound rotor绕组系数winding factor换向器commutator集电环collector ring换向片commutator segment励磁响应excitation response制动系统制动系统braking制动机构brake mechanism正常制动系normal braking system紧急制动系emergency braking system空气制动系air braking system液压制动系hydraulic braking system电磁制动系electromagnetic braking system机械制动系mechanical braking system辅助装置auxiliary device制动器释放braking releasing制动器闭合brake setting液压缸hydraulic cylinder溢流阀relief valve泻油drain齿轮马达gear motor齿轮泵gear pump电磁阀solenoid液压过滤器hydraulic filter液压泵hydraulic pump液压系统hydraulic system油冷却器oil cooler压力控制器pressure control valve压力继电器pressure switch减压阀reducing valve安全阀safety valve设定压力setting pressure切换switching旋转接头rotating union压力表pressure gauge液压油hydraulic fluid液压马达hydraulic motor油封oil seal刹车盘brake disc闸垫brake pad刹车油brake fluid闸衬片brake lining传动比transmission ratio齿轮gear齿轮副gear pair平行轴齿轮副gear pair with parallel axes 齿轮系train of gears行星齿轮系planetary gear train小齿轮pinion大齿轮wheel , gear主动齿轮driving, gear从动齿轮driven gear行星齿轮planet gear行星架planet carrier太阳轮sun gear内齿圈ring gear外齿轮external gear内齿轮internal内齿轮副internal gear pair增速齿轮副speed increasing gear增速齿轮系speed increasing gear train中心距center distance增速比speed increasing ratio齿面tooth flank工作齿面working flank非工作齿面non-working flank模数module齿数number of teeth啮合干涉meshing interference齿廓修行profile modification , profile correction 啮合engagement, mesh齿轮的变位addendum modification on gears变位齿轮gears with addendum modification圆柱齿轮cylindrical gear直齿圆柱齿轮spur gear斜齿圆柱齿轮helical gear single-helical gear节点pitch point节圆pitch circle齿顶圆tip circle齿根圆root circle直径和半径diameter and radius齿宽face width齿厚tooth thickness压力角pressure angle圆周侧隙circumferential backlash蜗杆worm蜗轮worm wheel联轴器coupling刚性联轴器rigid coupling万向联轴器universal coupling安全联轴器security coupling齿tooth齿槽tooth space斜齿轮helical gear人字齿轮double-helical gear齿距pitch法向齿距normal pitch轴向齿距axial pitch齿高tooth depth输入角input shaft输出角output shaft柱销pin柱销套roller行星齿轮传动机构planetary gear drive mechanism 中心轮center gear单级行星齿轮系single planetary gear train柔性齿轮flexible gear刚性齿轮rigidity gear柔性滚动轴承flexible rolling bearing输出联接output coupling刚度rigidity扭转刚度torsional rigidity弯曲刚度flexural rigidity扭转刚度系数coefficient of torsional起动力矩starting torque传动误差transmission error传动精度transmission accuracy固有频率natural frequency弹性联接elastic coupling刚性联接rigid coupling滑块联接Oldham coupling固定联接integrated coupling齿啮式联接dynamic coupling花键式联接splined coupling牙嵌式联接castellated coupling径向销联接radial pin coupling周期振动periodic vibration随机振动random vibration峰值peak value临界阻尼critical damping阻尼系数damping coefficient阻尼比damping ratio减震器vibration isolator振动频率vibration frequency幅值amplitude位移幅值displacement amplitude速度幅值velocity amplitude加速度幅值acceleration amplitude控制与监控系统远程监视telemonitoring协议protocol实时real time单向传输simplex transmission半双工传输half-duplex transmission双工传输duplex transmission前置机front end processor运输终端remote terminal unit调制解调器modulator-demodulator数据终端设备data terminal equipment接口interface数据电路data circuit信息information状态信息state information分接头位置信息tap position information监视信息monitored information设备故障信息equipment failure information告警alarm返回信息return information设定值set point value累积值integrated total integrated value瞬时测值instantaneous measured计量值counted measured metered measured metered reading 确认acknowledgement信号signal模拟信号analog signal命令command字节byte位bit地址address波特baud编码encode译码decode代码code集中控制centralized control可编程序控制programmable control微机程控minicomputer program模拟控制analogue control数字控制digital control强电控制strong current control弱电控制weak current control单元控制unit control就地控制local control联锁装置interlocker模拟盘analogue board配电盘switch board控制台control desk紧急停车按钮emergency stop push-button 限位开关limit switch限速开关limit speed switch有载指示器on-load indicator屏幕显示screen display指示灯display lamp起动信号starting signal公共供电点point of common coupling闪变flicker数据库data base硬件hardware硬件平台hardware platform层layer level class模型model响应时间response time软件software软件平台software platform系统软件system software自由脱扣trip-free基准误差basic error一对一控制方式one-to-one control mode 一次电流primary current一次电压primary voltage二次电流secondary current二次电压secondary voltage低压电器low voltage apparatus额定工作电压rated operational voltage额定工作电流rated operational current运行管理operation management安全方案safety concept外部条件external conditions失效failure故障fault控制柜control cabinet冗余技术redundancy正常关机normal shutdown失效-安全fail-safe排除故障clearance空转idling外部动力源external power supply锁定装置locking device运行转速范围operating rotational speed range临界转速activation rotational speed最大转速maximum rotational speed过载功率over power临界功率activation power最大功率maximum power短时切出风速short-term cut-out wind speed外联机试验field test with turbine试验台test-bed台架试验test on bed防雷系统lighting protection system外部防雷系统external lighting protection system内部防雷系统internal lighting protection system等电位连接equipotential bonding接闪器air-termination system引下线down-conductor接地装置earth-termination system接地线earth conductor接地体earth electrode环形接地体ring earth external基础接地体foundation earth electrode等电位连接带bonding bar等电位连接导体bonding conductor保护等级protection lever防雷区lighting protection zone雷电流lighting current电涌保护器surge suppressor共用接地系统common earthing system接地基准点earthing reference points持续运行continuous operation持续运行的闪变系数flicker coefficient for continuous operation闪变阶跃系数flicker step factor最大允许功率maximum permitted最大测量功率maximum measured power电网阻抗相角network impedance phase angle正常运行normal operation功率采集系统power collection system额定现在功率rated apparent power额定电流rated current额定无功功率rated reactive power停机standstill起动start-up切换运行switching operation扰动强度turbulence intensity电压变化系数voltage change factor风力发电机端口wind turbine terminals风力发电机最大功率maximum power of wind turbine 风力发电机停机parked wind turbine安全系统safety system控制装置control device额定载荷rated load周期period相位phase频率frequency谐波harmonics瞬时值instantaneous value同步synchronism振荡oscillation共振resonance波wave辐射radiation衰减attenuation阻尼damping畸变distortion电electricity电的electric静电学electrostatics电荷electric charge电压降voltage drop电流electric current导电性conductivity电压voltage电磁感应electromagnetic induction励磁excitation电阻率resistivity导体conductor半导体semiconductor电路electric circuit串联电路series circuit电容capacitance电感inductance电阻resistance电抗reactance阻抗impedance传递比transfer ratio交流电压alternating voltage交流电流alternating current脉动电压pulsating voltage脉动电流pulsating current直流电压direct voltage直流电流direct current瞬时功率instantaneous power有功功率active power无功功率reactive power有功电流active current无功电流reactive current功率因数power factor中性点neutral point相序sequential order of the phase电气元件electrical device接线端子terminal电极electrode地earth接地电路earthed circuit接地电阻resistance of an earthed conductor 绝缘子insulator绝缘套管insulating bushing母线busbar线圈coil螺纹管solenoid绕组winding电阻器resistor电感器inductor电容器capacitor继电器relay电能转换器electric energy transducer电机electric machine发电机generator电动机motor变压器transformer变流器converter变频器frequency converter整流器rectifier逆变器inverter传感器sensor耦合器electric coupling放大器amplifier振荡器oscillator滤波器filter半导体器件semiconductor光电器件photoelectric device 触头contact开关设备switchgear控制设备control gear闭合电路closed circuit断开电路open circuit通断switching联结connection串联series connection并联parallel connection星形联结star connection三角形联结delta connection主电路main circuit辅助电路auxiliary circuit控制电路control circuit信号电路signal circuit保护电路protective circuit换接change-over circuit换向commutation输入功率input power输入input输出output负载load加载to load充电to charge放电to discharge有载运行on-load operation空载运行no-load operation开路运行open-circuit operation 短路运行short-circuit operation 满载full load效率efficiency损耗loss过电压over-voltage过电流over-current欠电压under-voltage特性characteristic绝缘物insulant隔离to isolate绝缘insulation绝缘电阻insulation resistance品质因数quality factor泄漏电流leakage current闪烙flashover短路short circuit噪声noise极限值limiting value额定值rated value额定rating环境条件environment condition 使用条件service condition工况operating condition额定工况rated condition负载比duty ratio绝缘比insulation ratio介质试验dielectric test常规试验routine test抽样试验sampling test验收试验acceptance test投运试验commissioning test维护试验maintenance test加速accelerating特性曲线characteristic额定电压rated voltage额定电流rated current额定频率rated frequency温升temperature rise温度系数temperature coefficient 端电压terminal voltage短路电流short circuit current可靠性reliability有效性availability耐久性durability维修maintenance维护preventive maintenance工作时间operating time待命时间standby time修复时间repair time寿命life使用寿命useful life平均寿命mean life耐久性试验endurance test寿命试验life test可靠性测定试验reliability determination test 现场可靠性试验field reliability test加速试验accelerated test安全性fail safe应力stress强度strength试验数据test data现场数据field data电触头electrical contact主触头main contact击穿breakdown耐电压proof voltage放电electrical discharge透气性air permeability电线电缆electric wire and cable电力电缆power cable通信电缆telecommunication cable油浸式变压器oil-immersed type transformer 干式变压器dry-type transformer自耦变压器auto-transformer有载调压变压器transformer fitted with OLTC 空载电流non-load current阻抗电压impedance voltage电抗电压reactance voltage电阻电压resistance voltage分接tapping配电电器distributing apparatus控制电器control apparatus开关switch熔断器fuse断路器circuit breaker控制器controller接触器contactor机械寿命mechanical endurance电气寿命electrical endurance旋转电机electrical rotating machine直流电机direct current machine交流电机alternating current machine同步电机synchronous machine异步电机asynchronous machine感应电机induction machine励磁机exciter饱和特性saturation characteristic开路特性open-circuit characteristic负载特性load characteristic短路特性short-circuit characteristic额定转矩rated load torque规定的最初起动转矩specifies breakaway torque交流电动机的最初起动电流breakaway starting current if an a.c. 同步转速synchronous speed转差率slip短路比short-circuit ratio同步系数synchronous coefficient空载no-load系统system触电；电击electric block正常状态normal condition接触电压touch voltage跨步电压step voltage对地电压voltage to earth触电电流shock current残余电流residual current安全阻抗safety impedance安全距离safety distance安全标志safety marking安全色safety color中性点有效接地系统system with effectively earthed neutral检修接地inspection earthing工作接地working earthing保护接地protective earthing重复接地iterative earth故障接地fault earthing过电压保护over-voltage protection过电流保护over-current protection断相保护open-phase protection防尘dust-protected防溅protected against splashing防滴protected against dropping water防浸水protected against the effects of immersion过电流保护装置over-current protective device保护继电器protective relay接地开关earthing switch漏电断路器residual current circuit-breaker灭弧装置arc-control device安全隔离变压器safety isolating transformer避雷器surge attester ; lightning arrester保护电容器capacitor for voltage protection安全开关safety switch限流电路limited current circuit振动vibration腐蚀corrosion点腐蚀spot corrosion金属腐蚀corrosion of metals化学腐蚀chemical corrosion贮存storage贮存条件storage condition运输条件transportation condition空载最大加速度maximum bare table acceletation 电力金具悬垂线夹suspension clamp耐张线夹strain clamp挂环link挂板clevis球头挂环ball-eye球头挂钩ball-hookU型挂环shackleU型挂钩U-bolt联板yoke plate牵引板towing plate挂钩hook吊架hanger调整板adjusting plate花篮螺栓turn buckle接续管splicing sleeve补修管repair sleeve调线线夹jumper clamp防振锤damper均压环grading ring屏蔽环shielding ring间隔棒spacer重锤counter weight线卡子guy clip心形环thimble设备线夹terminal connectorT形线夹T-connector硬母线固定金具bus-bar support母线间隔垫bus-bar separetor母线伸缩节bus-bar expansion外光检查visual ins振动试验vibration tests老化试验ageing tests冲击动载荷试验impulse load tests 耐腐试验corrosion resistance tests 棘轮扳手ratchet spanner专用扳手special purpose spanner 万向套筒扳手flexible pliers可调钳adjustable pliers夹线器conductor holder电缆剪cable cutter卡线钳conductor clamp单卡头single clamp双卡头double clamp安全帽safety helmet安全带safety belt绝缘手套insulating glove绝缘靴insulating boots护目镜protection spectacles缝焊机seam welding machine。
毕业论文风力发电机技能参考文献外文
毕业论文风力发电机技能参考文献外文unanimously approved, has a leading position. Moreover, the small and medium Wind power technology is ultimately distributed independent power supply to meet end-market, rather than large-scale wind power generation and network technologies to meet the domestic monopoly market, technology, update rate must be adapted to a broad and rapidly growing market.3. wind and solar technology:Wind is the integration of technical skills and the Small and Medium Wind Energy Solar Energy Technology, combines a variety of applications of new technology, and it covers many areas, the wide range of applications, technical differentiation is so great that a variety of techniques which can separate match.Wind and solar power is currently the world in the use of new energy technology the most mature, most large-scale and industrial development of the industry, separate and individual solar wind has its drawbacks of development, but both wind and solar power complementary combined to realize the two new configuration of energy in natural resources, the technical programs of integration, performance and price compared to aspects of the new energy source for the most reasonable, not only reduces the demand to meet under the same unit cost and expand the scope of application of the market, also increases the reliability of the product.In addition: solar and wind power are both new energy, solar energy than the wind started to be late more than 30 per solar PV / W by the general public about the price of recognition can be converted to a 15% rate;while the price of small wind powerconversion rate is only 1/5-1/6 of the same 60% -80%, only the low price Worse still suppressed, photoelectric production of pollution on the environment greater than wind power, than substantial development in wind energy, this comparison contrast twist of meditation ......, if people use the energy from the point of view, our goal is to meet the electricity from wind power generating capacity to measure the cost of solar energy economy than many .Wind, solar and wind power integration advantages, not only for the 'energy saving, emission reduction,'opened up new horizons for the application of science to meet human needs, for the world to open a fourthRevolution.Second，Wind power has three kinds of operation mode:one is independent operation mode, usually a small wind generators to one or a few families to provide power, storage battery energy, to ensure the electricity without wind, Second is the wind turbines and other power mode (such as engine power), combining to a。
【VIP专享】风力发电机用专业英语中文对照
风力发电机用专业英语中文对照（一）风力机wind turbine风电场wind power station wind farm风力发电机组wind turbine generator system WTGS水平轴风力机horizontal axis wind turbine 垂直轴风力机vertical axis wind turbine轮毂（风力机）hub (for wind turbine)机舱nacelle支撑结构support structure for wind turbine 关机shutdown for wind turbine正常关机normal shutdown for wind turbine 紧急关机emergency shutdown for wind turbine空转idling锁定blocking停机parking静止standstill制动器brake停机制动parking brake风轮转速rotor speed控制系统control system保护系统protection system偏航yawing设计和安全参数design situation设计工况design situation载荷状况load case外部条件external conditions设计极限design limits极限状态limit state使用极限状态serviceability limit states极限限制状态ultimate limit state最大极限状态ultimate limit state安全寿命safe life严重故障catastrophic failure潜伏故障latent fault dormant failure风特性wind characteristic风速wind speed风矢量wind velocity旋转采样风矢量rotationally sampled wind velocity额定风速rated wind speed切入风速cut-in speed切出风速cut-out speed年平均annual average年平均风速annual average wind speed平均风速mean wind speed 极端风速extreme wind speed安全风速survival wind speed参考风速reference wind speed风速分布wind speed distribution瑞利分布RayLeigh distribution威布尔分布Weibull distribution风切变wind shear风廓线风切变律wind profile wind shear law 风切变指数wind shear exponent对数风切变律logarithmic wind shear law风切变幂律power law for wind shear下风向down wind上风向up wind阵风gust粗糙长度roughness length湍流强度turbulence intensity湍流尺度参数turbulence scale parameter湍流惯性负区inertial sub-range风场wind site测量参数measurement parameters测量位置measurement seat最大风速maximum wind speed风功率密度wind power density风能密度wind energy density日变化diurnal variation年变化annual variation轮毂高度hub height风能wind energy标准大气状态standard atmospheric state 风切变影响influence by the wind shear阵风影响gust influence风速频率frequency of wind speed环境environment工作环境operational environment气候climate海洋性气候ocean climate大陆性气候continental climate露天气候open-air climate室内气候indoor climate极端extreme日平均值daily mean极端最高extreme maximum年最高annual maximum年最高日平均温度annual extreme daily mean of temperature月平均温度mean monthly temperature空气湿度air humidity绝对湿度absolute humidity相对湿度relative humidity降水precipitation雨rain冻雨freezing rain霜淞rime雨淞glaze冰雹hail露dew雾fog盐雾salt fog雷暴thunderstorm雪载snow load标准大气压standard air pressure平均海平面mean sea level海拔altitude辐射通量radiant flux太阳辐射solar radiation直接太阳辐射direct solar radiation天空辐射sky radiation太阳常数solar constant太阳光谱solar spectrum黑体black body白体white body温室效应greenhouse effect环境温度ambient temperature表面温度surface temperature互联interconnection输出功率output power额定功率rated power最大功率maximum power电网连接点network connection point电力汇集系统power collection system风场电器设备site electrical facilities功率特性power performance静电功率输出net electric power output 功率系数power performance自由流风速free stream wind speed扫掠面积swept area轮毂高度hub height测量功率曲线measurement power curve 外推功率曲线extrapolated power curve 年发电量annual energy production 可利用率availability数据组功率特性测试data set for power performance measurement精度accuracy测量误差uncertainty in measurement分组方法method of bins测量周期measurement period测量扇区measurement sector日变化diurnal variations浆距角pitch angle距离常数distance constant试验场地test site气流畸变flow distortion障碍物obstacles复杂地形带complex terrain风障wind break声压级sound pressure level声级weighted sound pressure level; sound level视在声功率级apparent sound power level 指向性directivity音值tonality声的基准面风速acoustic reference wind speed标准风速standardized wind speed基准高度reference height基准粗糙长度reference roughness length 基准距离reference distance掠射角grazing angle风轮风轮wind rotor风轮直径rotor diameter风轮扫掠面积rotor swept area风轮仰角tilt angle of rotor shaft风轮偏航角yawing angle of rotor shaft风轮额定转速rated turning speed of rotor 风轮最高转速maximum turning speed of rotor风轮尾流rotor wake尾流损失wake loss传动比transmission ratio齿轮gear齿轮副gear pair平行轴齿轮副gear pair with parallel axes齿轮系train of gears行星齿轮系planetary gear train小齿轮pinion大齿轮wheel gear主动齿轮driving gear从动齿轮driven gear行星齿轮planet gear行星架planet carrier太阳轮sun gear内齿圈ring gear外齿轮external gear内齿轮internal内齿轮副internal gear pair增速齿轮副speed increasing gear增速齿轮系speed increasing gear train中心距center distance增速比speed increasing ratio齿面tooth flank工作齿面working flank非工作齿面non-working flank模数module齿数number of teeth啮合干涉meshing interference齿廓修行profile modification , profile correction啮合engagement, mesh齿轮的变位addendum modification on gears变位齿轮gears with addendum modification 圆柱齿轮cylindrical gear直齿圆柱齿轮spur gear斜齿圆柱齿轮helical gear single-helical gear节点pitch point节圆pitch circle齿顶圆tip circle齿根圆root circle直径和半径diameter and radius齿宽face width齿厚tooth thickness压力角pressure angle圆周侧隙circumferential backlash蜗杆worm蜗轮worm wheel 联轴器coupling刚性联轴器rigid coupling万向联轴器universal coupling安全联轴器security coupling齿tooth齿槽tooth space斜齿轮helical gear人字齿轮double-helical gear齿距pitch法向齿距normal pitch轴向齿距axial pitch齿高tooth depth输入角input shaft输出角output shaft柱销pin柱销套roller行星齿轮传动机构planetary gear drive mechanism中心轮center gear单级行星齿轮系single planetary gear train 柔性齿轮flexible gear刚性齿轮rigidity gear柔性滚动轴承flexible rolling bearing输出联接output coupling刚度rigidity扭转刚度torsional rigidity弯曲刚度flexural rigidity扭转刚度系数coefficient of torsional起动力矩starting torque传动误差transmission error传动精度transmission accuracy固有频率natural frequency弹性联接elastic coupling刚性联接rigid coupling滑块联接Oldham coupling固定联接integrated coupling齿啮式联接dynamic coupling花键式联接splined coupling牙嵌式联接castellated coupling径向销联接radial pin coupling周期振动periodic vibration随机振动random vibration峰值peak value临界阻尼critical damping阻尼系数 damping coefficient 阻尼比 damping ratio 减震器 vibration isolator振动频率 vibration frequency 幅值 amplitude位移幅值displacement amplitude 速度幅值 velocity amplitude加速度幅值 acceleration amplitude 控制与监控系统远程监视 telemonitoring 协议 protocol 实时 real time风力发电机用专业英语中文对照（二）单向传输 simplex transmission 半双工传输 half-duplex transmission 双工传输 duplex transmission 前置机 front end processor 运输终端 remote terminal unit 调制解调器 modulator-demodulator 数据终端设备 data terminal equipment 接口 interface 数据电路 data circuit 信息 information 状态信息 state information 分接头位置信息 tap position information 监视信息 monitored information 设备故障信息 equipment failure information 告警 alarm 返回信息 return information 设定值 set point value 累积值 integrated total integrated value 瞬时测值 instantaneous measured 计量值 counted measured metered measured metered reading 确认 acknowledgement 信号 signal 模拟信号 analog signal 命令 command 字节 byte 位bit 地址 address 波特 baud 编码 encode 译码 decode 代码 code 集中控制 centralized control 可编程序控制 programmable control 微机程控 minicomputer program 模拟控制 analogue control 数字控制 digital control 强电控制 strong current control 弱电控制 weak current control 单元控制 unit control 就地控制 local control 联锁装置 interlocker 模拟盘 analogue board 配电盘 switch board 控制台 control desk 紧急停车按钮 emergency stop push-button 限位开关 limit switch 限速开关 limit speed switch 有载指示器on-load indicator 屏幕显示 screen display 指示灯 display lamp 起动信号 starting signal 公共供电点 point of common coupling 闪变 flicker 数据库data base 硬件 hardware 硬件平台 hardware platform 层 layer level class 模型 model 响应时间 response time 软件 software 软件平台 software platform 系统软件 system software 自由脱扣 trip-free 基准误差 basic error 一对一控制方式 one-to-one control mode 一次电流 primary current 一次电压 primary voltage二次电流secondary current二次电压secondary voltage低压电器low voltage apparatus额定工作电压rated operational voltage 额定工作电流rated operational current 运行管理operation management安全方案safety concept外部条件external conditions失效failure故障fault控制柜control cabinet冗余技术redundancy正常关机normal shutdown失效-安全fail-safe排除故障clearance空转idli负载load加载to load充电to charge放电to discharge有载运行on-load operation空载运行no-load operation开路运行open-circuit operation短路运行short-circuit operation满载full load效率efficiency损耗loss过电压over-voltage过电流over-current欠电压under-voltage特性characteristic绝缘物insulant隔离to isolate绝缘insulation绝缘电阻insulation resistance品质因数quality factor泄漏电流leakage current闪烙flashover短路short circuit噪声noise极限值limiting value额定值rated value额定rating环境条件environment condition 使用条件service condition工况operating condition额定工况rated condition负载比duty ratio绝缘比insulation ratio介质试验dielectric test常规试验routine test抽样试验sampling test验收试验acceptance test投运试验commissioning test维护试验maintenance test加速accelerating特性曲线characteristic额定电压rated voltage额定电流rated current额定频率rated frequency温升temperature rise温度系数temperature coefficient端电压terminal voltage短路电流short circuit current可靠性reliability有效性availability耐久性durability维修maintenance维护preventive maintenance工作时间operating time待命时间standby time修复时间repair time寿命life使用寿命useful life平均寿命mean life耐久性试验endurance test寿命试验life test可靠性测定试验reliability determination test 现场可靠性试验field reliability test加速试验accelerated test安全性fail safe应力stress强度strength试验数据test data现场数据field data电触头electrical contact主触头main contact击穿breakdown耐电压 proof voltage 放电 electrical discharge 透气性 air permeability 电线电缆 electric wire and cable 电力电缆 power cable 通信电缆 telecommunication cable 油浸式变压器 oil-immersed type transformer 干式变压器 dry-type transformer 自耦变压器 auto-transformer 有载调压变压器 transformer fitted with OLTC 空载电流 non-load current 阻抗电压 impedance voltage 电抗电压 reactance voltage 电阻电压 resistance voltage分接 tapping 配电电器 distributing apparatus 控制电器 control apparatus 开关 switch 熔断器 fuse 断路器 circuit breaker 控制器 controller 接触器 contactor 机械寿命 mechanical endurance 电气寿命 electrical endurance 旋转电机 electrical rotating machine 直流电机 direct current machine 交流电机 alternating current machine 同步电机 synchronous machine 异步电机 asynchronous machine 感应电机 induction machine 励磁机 exciter 饱和特性 saturation characteristic 开路特性 open-circuit characteristic 负载特性 load characteristic 短路特性 short-circuit characteristic 额定转矩 rated load torque 规定的最初起动转矩 specifies breakaway torque 交流电动机的最初起动电流 breakaway starting current if an a.c. 同步转速 synchronous speed 转差率 slip 短路比 short-circuit ratio 同步系数 synchronous coefficient 空载 no-load 系统system 触电；电击 electric block 正常状态 normal condition 接触电压 touch voltage 跨步电压 step voltage 对地电压 voltage to earth 触电电流 shock current 残余电流 residual current 安全阻抗 safety impedance 安全距离safety distance 安全标志 safety marking 安全色 safety color 中性点有效接地系统 system with effectively earthedneutral 检修接地 inspection earthing 工作接地 working earthing 保护接地 protective earthing 重复接地 iterative earth 故障接地 fault earthing 过电压保护 over-voltage protection 过电流保护 over-current protection 断相保护 open-phase protection 防尘 dust-protected 防溅protected against splashing 防滴 protected against dropping water 防浸水 protected against the effects of immersion 过电流保护装置 over-current protective device 保护继电器 protective relay 接地开关 earthing switch 漏电断路器 residual current circuit-breaker 灭弧装置 arc-control device 安全隔离变压器 safety isolating transformer 避雷器 surge attester ; lightning arrester 保护电容器 capacitor for voltage protection 安全开关 safety switch 限流电路 limited current circuit 振动 vibration 腐蚀 corrosion 点腐蚀 spot corrosion 金属腐蚀 corrosion of metals 化学腐蚀 chemical corrosion 贮存 storage 贮存条件 storage condition 运输条件 transportation condition空载最大加速度maximum bare table acceletation 电力金具悬垂线夹suspension clamp耐张线夹strain clamp挂环link挂板clevis球头挂环ball-eye球头挂钩ball-hookU型挂环shackleU型挂钩U-bolt联板yoke plate牵引板towing plate挂钩hook吊架hanger调整板adjusting plate花篮螺栓turn buckle接续管splicing sleeve补修管repair sleeve调线线夹jumper clamp防振锤damper均压环grading ring屏蔽环shielding ring。
风力发电机毕业论文英文文献翻译
附录一英文文献Wind Energy Introduction1.1 Historical DevelopmentWindmills have been used for at least 3000 years, mainly for grinding grain or pumping water, while in sailing ships the wind has been an essential source of power for even longer. From as early as the thirteenth century, horizontal-axis windmills were an integral part of the rural economy and only fell into disuse with the advent of cheap fossil-fuelled engines and then the spread of rural electrification.The use of windmills (or wind turbines) to generate electricity can be traced back to the late nineteenth century with the 12 kW DC windmill generator constructed by Brush in the USA and the research undertaken by LaCour in Denmark. However, for much of the twentieth century there was little interest in using wind energy other than for battery charging for remote dwellings and these low-power systems were quickly replaced once access to the electricity grid became available. One notable exception was the 1250 kW Smith–Putnam wind turbine constructed in the USA in 1941. This remarkable machine had a steel rotor 53 m in diameter, full-span pitch control and flapping blades to reduce loads. Although a blade spar failed catastrophically in 1945, it remained the largest wind turbine constructed for some 40 years (Putnam, 1948).Golding (1955) and Shepherd and Divone in Spera (1994) provide a fascinating history of early wind turbine development. They record the 100 kW 30 m diameter Balaclava wind turbine in the then USSR in 1931 and the Andrea Enfield 100 kW 24 m diameter pneumatic design constructed in the UK in the early 1950s. In this turbine hollow blades, open at the tip, were used to draw air up through the tower where another turbine drove the generator. In Denmark the 200 kW 24 m diameter Gedser machine was built in 1956 while Electricite´de France tested a 1.1 MW 35 m diameter turbine in 1963. In Germany, Professor Hutter constructed a number of innovative, lightweight turbines in the 1950s and 1960s. In spite of these technical advances and the enthusiasm, among others, of Golding at the Electrical Research Association in the UK there was little sustained interest in wind generation until the price of oil rose dramatically in 1973.The sudden increase in the price of oil stimulated a number of substantial Government-funded programmes of research, development and demonstration. In the USA this led to the construction of a series of prototype turbines starting with the 38 m diameter 100 kW Mod-0 in 1975 and culminating in the 97.5 m diameter 2.5 MW Mod-5B in 1987. Similar programmes were pursued in the UK, Germany and Sweden. There was considerable uncertainty as to which architecture might prove most cost-effective and several innovative concepts were investigated at full scale. In Canada, a 4 MW vertical-axis Darrieus wind turbine was constructed and this concept was also investigated in the 34 m diameter Sandia Vertical Axis Test Facility in the USA. In the UK, an alternative vertical-axis design using straight blades to give an ‘H’ type rotor was proposed by Dr Peter Musgrove and a 500 kW prototypeconstructed. In 1981 an innovative horizontal-axis 3 MW wind turbine was built and tested in the USA. This used hydraulic transmission and, as an alternative to a yaw drive, the entire structure was orientated into the wind. The best choice for the number of blades remained unclear for some while and large turbines were constructed with one, two or three blades.Much important scientific and engineering information was gained from these Government-funded research programmes and the prototypes generally worked as designed. However, it has to be recognized that the problems of operating very large Figure 1.1 1.5 MW, 64 m diameter Wind Turbine (Reproduced by permission of NEG MICON)wind turbines, unmanned and in difficult wind climates were often under-estimated and the reliability of the prototypes was not good. At the same time as the multi-megawatt prototypes were being constructed private companies, often with considerable state support, were constructing much smaller, often simpler,turbines for commercial sale. In particular the financial support mechanisms in California in the mid-1980s resulted in the installation of a very large number of quite small(<100 kW) wind turbines. A number of these designs also suffered from various problems but,being smaller, they were in general easier to repair and modify. The so-called 'Danish' wind turbine concept emerged of a three-bladed,stall-regulated rotor and a fixed-speed, induction machine drive train. This decep-tively simple architecture has proved to be remarkably successful and has now been implemented on turbines as large as 60 m in diameter and at ratings of 1.5 MW. The machines of Figures 1.1 and 1.2 are examples of this design. However, as the sizes of commercially available turbines now approach that of the large prototypes of the 1980s it is interesting to see that the concepts investigated then of variable-speed operation, full-span control of the blades, and advanced materials are being used increasingly by designers. Figure 1.3 shows a wind farm of direct-drive, variable-speed wind turbines. In this design, the synchronous generator is coupled directly to the aerodynamic rotor so eliminating the requirement for a gearbox. Figure 1.4 shows a more conventional, variable-speed wind turbine that uses a gearbox, while a small wind farm of pitch-regulated wind turbines, where full-span control of the blades is used to regulate power, is shown in Figure 1.5.Figure 1.2 750 kW, 48 m diameter Wind Turbine, Denmark (Reproduced by permission of NEG MICON)Figure 1.3 Wind Farm of Variable-Speed Wind Turbines in Complex Terrain (Reproduced by permission of Wind Prospect Ltd)Figure 1.4 1 MW Wind Turbine in Northern Ireland (Reproduced by permission of Renew-able Energy Systems Ltd)The stimulus for the development of wind energy in 1973 was the price of oil and concern over limited fossil-fuel resources. Now, of course, the main driver for use of wind turbines to generate electrical power is the very low C emissions (over the entire life cycle of manufacture, installation, operation and de-commissioning)Figure 1.5 Wind Farm of Six Pitch-regulated Wind Turbines in Flat Terrain (Reproduced by permission of Wind Prospect Ltd)and the potential of wind energy to help limit climate change. In 1997 the Commis-sion of the European Union published its White Paper (CEU, 1997) calling for 12 percent of the gross energy demand of the European Union to be contributed from renewables by 2010. Wind energy was identified as having a key role to play in the supply of renewable energy with an increase in installed wind turbine capacity from 2.5 GW in 1995 to 40 GW by 2010. This target is likely to be achievable since at the time of writing, January 2001, there was some 12 GW of installed wind-turbine capacity in Europe, 2.5 GW of which was constructed in 2000 compared with only 300 MW in 1993. The average annual growth rate of the installation of wind turbines in Europe from 1993-9 was approximately 40 percent (Zervos, 2000). The distribution of wind-turbine capacity is interesting with, in 2000, Germany account- ing for some 45 percent of the European total, and Denmark and Spain each having approximately18 percent. There is some 2.5 GW of capacity installed in the USA of which 65 percent is in California although with increasing interest in Texas and some states of the midwest. Many of the California wind farms were originallyconstructed in the 1980s and are now being re-equipped with larger modern wind turbines.Table 1.1 shows the installed wind-power capacity worldwide in January 2001 although it is obvious that with such a rapid growth in some countries data of this kind become out of date very quickly.The reasons development of wind energy in some countries is flourishing while in others it is not fulfilling the potential that might be anticipated from a simple consideration of the wind resource, are complex. Important factors include the financial-support mechanisms for wind-generated electricity, the process by which the local planning authorities give permission for the construction of wind farms,and the perception of the general population particularly with respect to visual impact. In order to overcome the concerns of the rural population over the environ-mental impact of wind farms there is now increasing interest in the development of sites offshore.1.2 Modern Wind TurbinesThe power output, P, from a wind turbine is liven by the well-known expression:P=where ρ is the density of air (1.225 kg/), is the power coefficient, A is the rotor swept area, and U is the wind speed.The density of air is rather low, 800 times less than that of water which powershydro plant, and this leads directly to the large size of a wind turbine. Depending on the design wind speed chosen, a 1.5 MW wind turbine may have a rotor that is more than 60 m in diameter. The power coefficient describes that fraction of the power in the wind that may be converted by the turbine into mechanical work. It has a theoretical maximum value of 0.593 (the Betz limit) and rather lower peak values are achieved in practice (see Chapter 3). The power coefficient of a rotor varies with the tip speed ratio (the ratio of rotor tip speed to free wind speed) and is only a maximum for a unique tip speed ratio. Incremental improvements in the power coefficient are continually being sought by detailed design changes of the rotor and, by operating at variable speed, it is possible to maintain the maximum power coefficient over a range of wind speeds. However, these measures will give only a modest increase in the power output. Major increases in the output power can only be achieved by increasing the swept area of the rotor or by locating the wind turbines on sites with higher wind speeds.Hence over the last 10 years there has been a continuous increase in the rotor diameter of commercially available wind turbines from around 30 m to more than 60 m. A doubling of the rotor diameter leads to a four-times increase in power output. The influence of the wind speed is, of course, more pronounced with a doubling of wind speed leading to an eight-fold increase in power. Thus there have been considerable efforts to ensure that wind farms are developed in areas of the highest wind speeds and the turbines optimally located within wind farms. In certain countries very high towers are being used (more than 60-80 m) to take advantage of the increase of wind speed with height.In the past a number of studies were undertaken to determine the 'optimum size of a wind turbine by balancing the complete costs of manufacture, installation and operation of various sizes of wind turbines against the revenue generated (Mollyet al. 1993). The results indicated a minimum cost of energy would be obtained with wind turbine diameters in the range of 35-60 m, depending on the assumptions made. However, these estimates would now appear to be rather low and there is no obvious point at which rotor diameters, and hence output power, will be limited particularly for offshore wind turbines.All modern electricity-generating wind turbines use the lift force derived from the blades to drive the rotor. A high rotational speed of the rotor is desirable in order to reduce the gearbox ratio required and this leads to low solidity rotors (the ratio of blade area/rotor swept area). The low solidity rotor acts as an effective energy concentrator and as a result the energy recovery period of a wind turbine, on a good site, is less than 1 year, i.e., the energy used to manufacture and install the wind turbine is recovered within its first year of operation (Musgrove in Freris, 1990).附录二英文翻译风能介绍1.1发展历史风车的使用至少已有三千年，主要用于磨粒或泵站水，而在帆船风已成为不可缺少的电力来源甚至更长的一段时间。
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中英文对照外文翻译(文档含英文原文和中文翻译)附件1：翻译译文风力发电对电力系统的影响摘要风力发电依赖于气象条件，并逐渐以大型风电场的形式并入电网，给电网带来各种影响。
电网并未专门设计用来接入风电，因此如果要保持现有的电力供应标准，不可避免地需要进行一些相应的调整。
讨论了在风电场并网时遇到的各种问题。
由于风力发电具有大容量、动态和随机的特性，它给电力系统的有功/无功潮流、电压、系统稳定性、电能质量、短路容量、频率和保护等方面带来影响。
针对这些问题提出了相应的解决建议和措施，以及更好利用风力发电。
关键词：风力发电；电力系统；影响；风电场1.引言人们普遍接受，可再生能源发电是未来电力的供应。
由于电力需求快速增长，对以化石燃料为基础的发电是不可持续的。
正相反，风力发电作为一种有前途的可再生能源受到了很多关注。
当由于工业的发展和在世界大部分地区的经济增长而发电的消费需求一直稳步增长时，它有减少排放和降低不可替代的燃料储备消耗的潜力。
当大型风电场（几百兆瓦）是一个主流时，风力发电越来越更受欢迎。
2006年间，世界风能装机容量从2005年的59091兆瓦达到74223兆瓦。
在2006年极大的生长表明，决策者开始重视的风能发展能够带来的好处。
由于到2020年12%的供电来于1250GW的安装风电装机，将节约累积10771000000吨二氧化碳[1]。
大型风电场的电力系统具有很高的容量，动态随机性能，这将会挑战系统的安全性和可靠性。
而提供电力系统清洁能源的同时，风农场也会带来一些对电力系统不利的因素。
风力发电的扩展和风电在电力系统的比重增加，影响将很可能成为风力集成的技术性壁垒。
因此，应该探讨其影响和提出克服这些问题的对策。
2.风力发电发展现状从全球风能委员会（GWEC）的报告中，拥有最高装机容量总数的国家是德国（20621兆瓦），西班牙（11615兆瓦），美国（11603兆瓦），印度（6270兆瓦）和丹麦（3136兆瓦）。
世界范围内十三个国家现在可以算是达到1000兆瓦的风力发电能力，法国和加拿大在2006达到这一阈值。
如图1所示，直到2006年12月世界累计装机容量前10名[2]。
图1 到2006年12月世界累计装机容量中国开始发展风电很晚。
只有在90年代它才走向市场化的发展和规模建设。
这些年新增累积装机容量如图2显示。
单一机组容量从100千瓦，200千瓦，300千瓦600千瓦，750千瓦，1500千瓦逐步增加。
图2 在中国累计和新增加安装的风力发电能力在2006年中国通过安装风能的1347兆瓦，增加了一倍以上的总量容量，比去年的数值增长了70%。
这给中国带来多达2604兆瓦的能力，使中国成为世界第六个最大的市场。
中国市场在2006年大幅增长，这预计将继续增长并加快增长。
根据经批准的和在建设中的项目，在2007年将安装超过1500兆瓦。
到2010年底在中国的风电目标为5000兆瓦[3]。
3.风力发电项目的特点从风能的角度来看，风能资源的最显特点是其变化性。
风电场输出的随机变化主要根源于风速的波动和方向。
无论是地理性和时间性，风是很易变的。
此外，无论是在空间和时间上，这种变化性持续的范围非常广泛。
图3.布鲁克海文国家实验室工作的基础上的农场风谱图由于时间和高度的功能，风速不断变化。
风变化的时间尺度显示在图3的风力频谱图上[4]。
在一秒到分钟的范围阵风引起动荡的高峰。
每日的峰值取决于每天的风速变化和天气高峰取决于天气变化，通常因每天或每周而异，但也包括季节性周期。
从电力系统的角度来看，湍流高峰可能会影响风力发电的电能质量。
然而，昼夜和天气的高峰，可能会影响长期的电力系统的平衡，在这样的系统中风速预测起着显著作用。
另一个重要问题是风能资源的长期变化。
应知道加速到中心高度的风来计算风电场的输出。
大量风速测量表明，风速在一年中大多数是柔和的，介于0和25米/秒的概率是相当大的；年均风速受制于威布尔分布[5]，如公式（1）。
错误!未找到引用源。
(1) 其中：V是平均风速；k为形状参数；c是尺度参数。
风力发电机的输出之间的关系PW和风速集线器V的高度可以近似表示为风力发电机的输出与风速或分段函数的曲线，如公式（2）。
错误!未找到引用源。
(2)其中：PW是额定功率的风力发电机组的输出；V是风速达枢纽的高度VCI是停机风速；VCO被切出风速；VR被评为风速。
4.风力发电对电力系统的影响在电力系统中风力发电面临大型风电场对电网一体化的基本技术限制。
风力发电对电力系统的影响包括有效功和无效功，电压，系统稳定性，电能质量，短路容量和基础设施的特点由于高容量的风力发电的动态和随机性能。
在技术上，它通过以下方式影响和必须详细研究：（1）有功和无功流风力发电是一个间歇性和随机的电源，将功率流复杂化。
由于为了捕获更多的风能能源，许多风电场建成远离负荷中心，总有传输风力发电一些的障碍。
当引进额外的风力发电时一些传输或配电线路和其他电气设备可能过载。
因此，应确保互相连接传输或配电线路不过载。
有功和无功要求，都应予以调查。
无功功率应不仅在PCC中产生，但也通过整个网络产生，并应本地补偿[6]。
用于常规发电机的分析的方法是确定的，而忽略了不确定性的风速和负荷预测。
因此，概率性的方法是比较适合风力发电的。
约束以概率形式描述，并且预期参数值，如电压和功率，可以被计算。
（2）电压调节一旦风电场已经确定了其地点，连接到电网的点必须确定。
对于小型风力发电场，可以在低电压下连接，从而节省了开关设备、电缆和变压器的成本。
如果拟议的发展规模太大导致不可以与当地分布电压的连接，进而不能满足较高的电压传输网络的需要[7]。
在电力系统中随着风力发电安装容量的增加，风力发电的变化引起电压变化，特别是如果并入电网，这可能不是专门设计用于迎合重要和可能快速变化的负载，这是由风力发电变化引起的。
因此，需要采取监管措施，使电压保持在指定的范围内。
然而，为了控制电压，这可能导致增加对无功功率的辅助服务[8]。
（3）系统的稳定性在风力发电的电力系统中，电压稳定和频率的稳定性都受到风功率集成影响，这不仅是因为风力发电的加入将改变流量分布，也因为风力发电机与传统的同步机无论是在稳态或瞬态状态时相比表现不同[9]。
对于目前的风力发电场，当发生干扰时，保护操作通常是切断风电场之间的连接电网。
因此，在这种时刻的暂态稳定是非常重要的，尤其是当大型风电场的有机结合时最为重要。
然而，由于电网结构，风也可能使电源集成系统的瞬态稳定性差。
因此，不同的电力系统，暂态稳定性应分别进行分析。
固定速度的风力涡轮机输出有功功率时，它吸收无功功率。
“风电场无功功率的整体需求是相当大，从而导致减少在PCC附近地区的电压稳定。
与此相反，双馈变速风力发电机组对无功功率有一定的控制能力。
根据不同的操作和控制计划，这种风力发电机组可以吸收或输出无功功率控制电压，有利于电压稳定。
电压稳定也与短路容量相关，传输的PCC行比R / X和在风力发电场使用的无功补偿方法有关。
（4）电能质量风力发电的波动和相关电源（AC或DC）的传输、供电质量有直接的影响。
结果，大量的电压波动，可能会导致电压在调控范围外变化，以及违反闪烁和其他电源的质量标准。
在连续的运行和开关操作，风力发电机组，引起电压波动和闪烁，这些因素是风力发电影响电网电能质量的主要因素。
对于变速风力涡轮机和恒定频率，转换器造成的谐波问题，也应考虑。
风力涡轮机对电网干扰有不同的原因，其中大多原因是风力机本体。
有关参数列于表1[10]。
平均发电量，湍流强度及风切变与气象和地理条件因素相关。
所有其他的原因不仅归咎于电器元件的特点，如发电机，变压器等，也是转子和传动系统的空气动力学和机械性能的原因。
涡轮形式（即变量与主要固定的速度档位与节距调节）对风力涡轮机和风力发电场的电能质量特性有重要性。
闪烁是由风力发电机组的有功功率或无功功率的的波动造成的。
固定速度的风力发电机闪烁的主要原因是塔的尾流。
而变速风力发电机，平滑了快速功率波动，塔的尾流不影响输出功率。
因此，变速风力发电机组的闪烁一般比定速闪烁风力发电机低。
表1.风力发电机和风力发电厂对电网造成的影响参数原因电压升高电能生产开关操作塔影效应电压波动和闪烁叶片调节误差偏航误差风切变风速波动谐波变频器晶闸管控制器电压峰值和谷值开关操作（5）短路容量往往是大多数的风力发电场远离负荷中心建造，这意味着他们之间和其他间的电力系统的电气之间的距离，是相当远的。
有一常理说，长电距离，使电压变化较大，但短路问题少[11]。
然而，风力发电场将能够给未来的电力系统运行的短路电流计算带来越来越重要的影响。
原因是双重的。
一个是上述的事实，风力发电网站通常是远离的传统的电力中心。
这意味着短路电流的分布可能产生了很大的变化，导致一个完全不同的短路容量地图。
其他事实的原因是，今天，越来越多的风力发电，特别是以所谓的大型风力发电场（数百兆瓦）的形式。
在风电场大量的个别单位连接在一起，总代能力将大大上升。
风电场对相邻节点短路能力有很大影响，然而对远离PCC节点的影响不大[9]。
因此，当具有大容量的风场并入电网时，相邻变压器和交换机的容量可能需要增加。
应该进一步研究的是：如何判断风力发电对现有网络上的电气设备短路电流额定值的影响。
（6）频率调整为了在规定的标准范围内控制电力系统频率，要求一些发电厂向电网公司提供频率控制配套服务。
然而，风力发电量总额的增加，其变化频率输出是一个很重要的影响[8]。
（7）保护电流在风电场和电网之间的流动是双向的，这是在保护的设计和配置应予以考虑的。
无论风力发电机采用何种发电机，风电场的整合将增加电网故障水平，进而影响原有的电网保护装置继电器的设置。
这可能需要增加新的保护装置或修改原有保护设备的继电器的设置。
尤其是如果风电场连接到分配网络，断路器可能在风电场装机容量增加时产生超负荷[8]。
5.减轻风力发电的影响的对策无功补偿设备的应用，如静止无功补偿（SVC）和静止同步补偿器（STATCOM）在风力发电中减轻其对电力系统的影响起着重要作用。
为了保持电压等级，电网公司可以提供额外的或升级的电压控制设施。
无功补偿设备应该安装在风电场升压变电站，这具有快速响应特性，并且可不断调节，如在SVC和STATCOM等。
为了减少风力发电造成的电压波动和闪烁，既需要速度控制应加以改善，以便和俯仰角控制最大限度地减少了风力发电机的输出波动，而风力发电机的输出最大化。
同时，如在风场安装辅助设备SVC和储能装置也可以减轻电压波动和闪烁。
在大多数情况下，快速作用无功补偿设备，包括SVC和STATCOM，应被纳入为提高网络的暂态稳定的设备之中。
从风力发电方面，它可以通过不断的功率因数控制或恒压控制提高电力系统的电压稳定增加风力发电的渗透。