风能介绍外文翻译
风能电能英文作文
风能电能英文作文英文：Wind energy and electric energy are two important forms of renewable energy. Wind energy is generated by wind turbines that convert the kinetic energy of the wind into electrical energy. Electric energy, on the other hand, is generated by power plants that convert various forms of energy, such as nuclear energy, fossil fuels, or renewable sources, into electrical energy.Wind energy has many advantages. It is clean, renewable, and does not produce any harmful emissions. It is also abundant and widely available, especially in coastal areas and open fields. Wind turbines can be installed on land or offshore, making it a versatile source of energy.However, wind energy also has some limitations. Wind turbines require a certain wind speed to generate electricity, and they can be noisy and visually intrusive.They also have a limited capacity and cannot generate electricity continuously.Electric energy, on the other hand, has a higher capacity and can generate electricity continuously. It can also be produced from a variety of sources, including renewable sources such as wind, solar, and hydroelectric power. Electric energy is also more efficient than other forms of energy, such as fossil fuels, and produces fewer emissions.However, electric energy also has some drawbacks. It requires a lot of infrastructure, including power plants, transmission lines, and distribution networks. It can also be expensive to produce and distribute, especially if it is generated from non-renewable sources.In conclusion, both wind energy and electric energy have their advantages and disadvantages. While wind energy is clean and renewable, it has limitations in terms of capacity and reliability. Electric energy, on the other hand, has a higher capacity and can be produced from avariety of sources, but it requires a lot of infrastructure and can be expensive.中文：风能和电能是两种重要的可再生能源形式。
风能英汉互译作文
风能英汉互译作文Wind energy, also known as wind power, is a renewable and clean source of energy that has the potential to play a significant role in our transition towards a more sustainable future. By harnessing the power of the wind, we can generate electricity without producing harmful greenhouse gas emissions or depleting finite resources.One of the main advantages of wind energy is its abundance and accessibility. Wind is a naturally occurring phenomenon that is present all around the world, making it a widely available resource for generating electricity. With advancements in technology, wind turbines have become more efficient and cost-effective, allowing us to tap into this renewable energy source on a larger scale.Furthermore, wind energy is environmentally friendly and does not contribute to air or water pollution. Unlike fossil fuels, wind power does not produce harmful emissions that contribute to climate change or harm public health. By investing in wind energy infrastructure, we can reduce our reliance on fossil fuels and mitigate the impacts of global warming.In addition to its environmental benefits, wind energyalso has the potential to create jobs and stimulate economic growth. The development and maintenance of wind farms require skilled workers, engineers, and technicians, providing employment opportunities in the renewable energy sector. Moreover, investing in wind energy can help diversify our energy sources and reduce our dependence on imported fuels.In conclusion, harnessing wind energy is a sustainable and environmentally responsible way to meet our growing energy needs. By investing in wind power infrastructure and promoting the use of renewable energy sources, we can create a cleaner and healthier planet for future generations.中文翻译：风能，也被称为风力能源，是一种可再生且清洁的能源来源，有潜力在我们向更可持续未来转型中发挥重要作用。
风能英文简介
风能英⽂简介Wind powerWind power is the conversion of wind energy into a useful form of energy, such as using wind turbines to make electricity, wind mills for mechanical power, wind pumps for pumping water or drainage, or sails to propel ships.At the end of 2009, worldwide nameplate capacity of wind-powered generators was 159.2 gigawatts (GW).(By June 2010 the capacity had risen to 175 GW.) Energy production was 340 TWh, which is about 2% of worldwide electricity usage; and has doubled in the past three years. Several countries have achieved relatively high levels of wind power penetration, such as 20% of stationary electricity production in Denmark, 14% in Ireland and Portugal, 11% in Spain, and 8% in Germany in 2009. As of May 2009, 80 countries around the world are using wind power on a commercial basis.Wind power: worldwide installed capacity 1996-2008Large-scale wind farms are connected to the electric power transmission network; smaller facilities are used to provide electricity to isolated locations. Utility companies increasingly buy back surplus electricity produced by small domestic turbines. Wind energy, as an alternative to fossil fuels, is plentiful, renewable, widely distributed, clean, and produces no greenhouse gas emissions during operation. However, the construction of wind farms is not universally welcomed because of their visual impact but any effects on the environment are generally among the least problematic of any power source. The intermittency of wind seldom creates problems when using wind power to supply a low proportion of total demand, but as the proportion rises, increased costs, a need to upgrade the grid, and a lowered ability to supplant conventional production may occur. Power management techniques such as exporting and importing power to neighboring areas or reducing demand when wind production is low, can mitigate these problems.Burbo Bank Offshore Wind Farm, at the entrance to the River Mersey in North West England.HistoryHumans have been using wind power for at least 5,500 years to propel sailboats and sailing ships. Windmills have been used for irrigation pumping and for milling grain since the 7th century AD in what is now Afghanistan, India, Iran and Pakistan.In the United States, the development of the "water-pumping windmill" was the major factor in allowing the farming and ranching of vast areas otherwise devoid of readily accessible water. Windpumps contributed to the expansion of rail transport systems throughout the world, by pumping water from water wells for the steam locomotives. The multi-bladed wind turbine atop a lattice tower made of wood or steel was, for many years, a fixture of the landscape throughout rural America. When fitted with generators and battery banks, small wind machines provided electricity to isolated farms.Medieval depiction of a wind millIn July 1887, a Scottish academic, Professor James Blyth, undertook wind power experiments that culminated in a UK patent in 1891. In the United States, Charles F. Brush produced electricity using a wind powered machine, starting in the winter of 1887-1888, which powered his home and laboratory until about 1900. In the 1890s, the Danish scientist and inventor Poul la Cour constructed wind turbines to generate electricity, which was then used to produce hydrogen. These were the first of what was to become the modern form of wind turbine.Small wind turbines for lighting of isolated rural buildings were widespread in the first part of the 20th century. Larger units intended for connection to a distribution network were tried at several locations including Balaklava USSR in 1931 and in a 1.25 megawatt (MW) experimental unit in Vermont in 1941.The modern wind power industry began in 1979 with the serial production of wind turbines by Danish manufacturers Kuriant, Vestas, Nordtank, and Bonus. These early turbines were small by today's standards, with capacities of20–30 kW each. Since then, they have increased greatly in size, with the Enercon E-126 capable of delivering up to 7 MW, while wind turbine production has expanded to many countries.Windmills are typically installed in favourable windy locations. In the image, wind power generators in Spain near an Osborne bullWind energyThe Earth is unevenly heated by the sun, such that the poles receive less energy from the sun than the equator; along with this, dry land heats up (and cools down) more quickly than the seas do. The differential heating drives a global atmospheric convection system reaching from the Earth's surface to the stratosphere which acts as a virtual ceiling. Most of the energy stored in these wind movements can be found at high altitudes where continuous wind speeds of over 160 km/h (99 mph) occur. Eventually, the wind energy is converted through friction into diffuse heat throughout the Earth's surface and the atmosphere.The total amount of economically extractable power available from the wind is considerably more than present human power use from all sources. The most comprehensive study as of 2005 found the potential of wind power on land and near-shore to be 72 TW, equivalent to 54,000 MToE (million tons of oil equivalent) per year, or over five times the world's current energy use in all forms. The potential takes into account only locations with mean annual wind speeds ≥ 6.9 m/s at 80 m. The study assumes six 1.5 megawatt, 77 m diameter turbines per square kilometer on roughly 13% of the total global land area (though that land would also be available for other compatible uses such as farming). The authors acknowledge that many practical barriers would need to be overcome to reach this theoretical capacity.Map of available wind power for the United States. Color codes indicate wind power density classThe practical limit to exploitation of wind power will be set by economic and environmental factors, since the resource available is far larger than any practical means to develop it.Distribution of wind speedThe strength of wind varies, and an average value for a given location does not alone indicate the amount of energy a wind turbine could produce there. To assess the frequency of wind speeds at a particular location, a probability distribution function is often fit to the observed data. Different locations will have different wind speed distributions. The Weibull model closely mirrors the actual distribution of hourly wind speeds at many locations. The Weibull factor is often close to 2 and therefore a Rayleigh distribution can be used as a less accurate, but simpler model.Distribution of wind speed (red) and energy (blue) for all of 2002 at the Lee Ranch facility in Colorado. The histogram shows measured data, while the curve is the Rayleigh model distribution for the same average wind speedBecause so much power is generated by higher wind speed, much of the energy comes in short bursts. The 2002 Lee Ranch sample is telling; half of the energy available arrived in just 15% of the operating time. The consequence is that wind energy from a particular turbine or wind farm does not have as consistent an output as fuel-fired power plants.Electricity generationIn a wind farm, individual turbines are interconnected with a medium voltage (often 34.5 kV), power collection system and communications network. At a substation, this medium-voltage electric current is increased in voltage with a transformer for connection to the high voltage electric power transmission system.Typical components of a wind turbine (gearbox, rotor shaft and brake assembly) being lifted into positionThe surplus power produced by domestic microgenerators can, in some jurisdictions, be fed into the network and sold to the utility company, producing a retail credit for the microgenerators' owners to offset their energy costs.Grid managementInduction generators, often used for wind power, require reactive power for excitation so substations used in wind-power collection systems include substantial capacitor banks for power factor correction. Different types of wind turbine generators behave differently during transmission grid disturbances, so extensive modelling of the dynamic electromechanical characteristics of a new wind farm is required by transmission system operators to ensure predictable stable behaviour during system faults (see: Low voltage ride through). In particular, induction generators cannot support the system voltage during faults, unlike steam or hydro turbine-driven synchronous generators. Doubly-fed machines generally have more desirable properties for grid interconnection. Transmission systems operators will supply a wind farm developer with a gridcode to specify the requirements for interconnection to the transmission grid. This will include power factor, constancy of frequency and dynamic behavior of the wind farm turbines during a system fault.Capacity factorSince wind speed is not constant, a wind farm's annual energy production is never as much as the sum of the generator nameplate ratings multiplied by the total hours in a year. The ratio of actual productivity in a year to this theoretical maximum is called the capacity factor. Typical capacity factors are 20–40%, with values at the upper end of the range in particularly favourable sites. For example, a 1 MW turbine with a capacity factor of 35% will not produce8,760 MW·h in a year (1 × 24 × 365), but only 1 × 0.35 × 24 ×365 = 3,066 MW·h, averaging to 0.35 MW. Online data is available for some locations and the capacity factor can be calculated from the yearly output.Unlike fueled generating plants, the capacity factor is limited by the inherent properties of wind. Capacity factors of other types of power plant are based mostly on fuel cost, with a small amount of downtime for maintenance. Nuclear plants have low incremental fuel cost, and so are run at full output and achievea 90% capacity factor. Plants with higher fuel cost are throttled back to follow load. Gas turbine plants using natural gas as fuel may be very expensive to operate and may be run only to meet peak power demand. A gas turbine plant may have an annual capacity factor of 5–25% due to relatively high energy production cost.In a 2008 study released by the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy, the capacity factor achieved by the wind turbine fleet is shown to be increasing as the technology improves. The capacity factor achieved by new wind turbines in 2004 and 2005 reached 36%.PenetrationWind energy "penetration" refers to the fraction of energy produced by wind compared with the total available generation capacity. There is no generally accepted "maximum" level of wind penetration. The limit for a particular grid will depend on the existing generating plants, pricing mechanisms, capacity for storage or demand management, and other factors. An interconnected electricity grid will already include reserve generating and transmission capacity to allow for equipment failures; this reserve capacity can also serve to regulate for the varying power generation by wind plants. Studies have indicated that 20% of the total electrical energy consumption may be incorporated with minimal difficulty. These studies have been for locations with geographically dispersed wind farms, some degree of dispatchable energy, or hydropower with storage capacity, demand management, and interconnection to a large grid area export of electricity when needed. Beyond this level, there are few technical limits, but the economic implications become more significant. Electrical utilities continue to study the effects of large (20% or more) scale penetration of wind generation on system stability and economics.At present, a few grid systems have penetration of wind energy above 5%: Denmark (values over 19%), Spain and Portugal (values over 11%), Germany and the Republic of Ireland (values over 6%). But even with a modest level of penetration, there can be times where wind power provides a substantial percentage of the power on a grid. For example, in the morning hours of 8 November 2009, wind energy produced covered more than half the electricity demand in Spain, setting a new record. This was an instance where demand was very low but wind power generation was very high.Variability and intermittencyElectricity generated from wind power can be highly variable at several different timescales: from hour to hour, daily, and seasonally. Annual variation also exists, but is not as significant. Related to variability is the short-term (hourly or daily) predictability of wind plant output. Like other electricity sources, wind energy must be "scheduled". Wind power forecasting methods are used, but predictability of wind plant output remains low for short-term operation.Because instantaneous electrical generation and consumption must remain in balance to maintain grid stability, this variability can present substantial challenges to incorporating large amounts of wind power into a grid system. Intermittency and the non-dispatchable nature of wind energy production can raise costs for regulation, incremental operating reserve, and (at highpenetration levels) could require an increase in the already existing energy demand management, load shedding, or storage solutions or system interconnection with HVDC cables. At low levels of wind penetration, fluctuations in load and allowance for failure of large generating units requires reserve capacity that can also regulate for variability of wind generation. Wind power can be replaced by other power stations during low wind periods. Transmission networks must already cope with outages of generation plant and daily changes in electrical demand. Systems with large wind capacity components may need more spinning reserve (plants operating at less than full load).Wildorado Wind Ranch in Oldham County in the Texas Panhandle, as photographed from U.S. Route 385Pumped-storage hydroelectricity or other forms of grid energy storage can store energy developed by high-wind periods and release it when needed. Stored energy increases the economic value of wind energy since it can be shifted to displace higher cost generation during peak demand periods. The potential revenue from this arbitrage can offset the cost and losses of storage; the cost of storage may add 25% to the cost of any wind energy stored, but it is not envisaged that this would apply to a large proportion of wind energy generated. The 2 GW Dinorwig pumped storage plant in Wales evens out electrical demand peaks, and allows base-load suppliers to run their plant more efficiently. Although pumped storage power systems are only about 75% efficient, and have high installation costs, their low running costs and ability to reduce the required electrical base-load can save both fuel and total electrical generation costs.In particular geographic regions, peak wind speeds may not coincide with peak demand for electrical power. In the US states of California and Texas, for example, hot days in summer may have low wind speed and high electrical demand due to air conditioning. Some utilities subsidize the purchase of geothermal heat pumps by their customers, to reduce electricity demand during the summer months by making air conditioning up to 70% more efficient; widespread adoption of this technology would better match electricity demand to wind availability in areas with hot summers and low summer winds. Another option is to interconnect widely dispersed geographic areas with an HVDC"Super grid". In the USA it is estimated that to upgrade the transmission system to take in planned or potential renewables would cost at least $60 billion.In the UK, demand for electricity is higher in winter than in summer, and so are wind speeds. Solar power tends to be complementary to wind. On daily to weekly timescales, high pressure areas tend to bring clear skies and low surface winds, whereas low pressure areas tend to be windier and cloudier. On seasonal timescales, solar energy typically peaks in summer, whereas in many areas wind energy is lower in summer and higher in winter. Thus the intermittencies of wind and solar power tend to cancel each other somewhat. The Institute for Solar Energy Supply Technology of the University of Kassel pilot-tested a combined power plant linking solar, wind, biogas and hydrostorage to provide load-following power around the clock, entirely from renewable sources.A report on Denmark's wind power noted that their wind power network provided less than 1% of average demand 54 days during the year 2002. Wind power advocates argue that these periods of low wind can be dealt with by simply restarting existing power stations that have been held in readiness or interlinking with HVDC. Electrical grids with slow-responding thermal power plants and without ties to networks with hydroelectric generation may have to limit the use of wind power.[42]Three reports on the wind variability in the UK issued in 2009, generally agree that variability of wind needs to be taken into account, but it does not make the grid unmanageable; and the additional costs, which are modest, can be quantified. A 2006 International Energy Agency forum presented costs for managing intermittency as a function of wind-energy's share of total capacity for several countries, as shown: Increase in system operation costs, Euros per MW·h, for 10% and 20% wind share10% 20%Germany 2.5 3.2Denmark 0.4 0.8Finland 0.3 1.5Norway 0.1 0.3Sweden 0.3 0.7。
风能基础知识PPT(英文版)
Contents
Wind Power: Talk 1
• Why wind? • How wind turbines
work • The power in the
wind
Key factors in wind power
• Wind consistency (how much of the time does the wind blow, at a useful speed?)
• Wind speed (how high is the average wind speed?) • Spacing of turbines in the array (are they far enough apart to
require yaw device
• Vertical axis
– Don’t need to point into the wind
– Easy to construct
– Less efficient – Mounted lower, less
wind – More turbulent, stress
access undisturbed wind?) • Size of turbines (how large is the area of e circle covered by
the blades?) • How large an area of land (or sea) can be dedicated to the
Why wind?
• Wind is widely available • Largely independent from imports,
风电专业术语英文对照及解释
风电专业术语英文对照及解释风电专业术语中英对照及解释经电气网小编整理，下面是有关风电的一些专业术语的英汉对照及解释，希望对各位有用哦。
1.风能 /wind energy 空气流动所具有的能量。
2.风能资源 /wind energy resources 大气沿地球表面流动而产生的动能资源。
3.空气的标准状态 /standard atmospheric state 空气的标准状态是指空气压力为101 325Pa，温度为15℃（或绝对288.15K），空气密度1.225kg/m 3 时的空气状态。
4.风速/wind speed 空间特定点的风速为该点空气在单位时间内所流过的距离。
5.平均风速 /average wind speed 给定时间内瞬时风速的平均值。
6.年平均风速 /annual average wind speed 时间间隔为一整年的瞬时风速的平均值。
7.最大风速 /maximum wind speed 10分钟平均风速的最大值。
8.极大风速 /extreme wind speed 瞬时风速的最大值。
9.阵风 /gust 超过平均风速的突然和短暂的风速变化。
10.年际变化/inter-annual variation 以30年为基数发生的变化。
风速年际变化是从第1年到第30年的年平均风速变化。
11.[风速或风功率密度]年变化 /annual variation 以年为基数发生的变化。
风速（或风功率变化）年变化是从1月到12月的月平均风速（或风功率密度）变化。
12.[风速或风功率密度]日变化 /diurnal variation 以日为基数发生的变化。
月或年的风速（或风功率密度）日变化是求出一个月或一年内，每日同一钟点风速（或风功率密度）的月平均值或年平均值，得到0点到23点的风速（或风功率密度）变化。
风切变 /wind shear 风速在垂直于风向平面内的变化。
13.风切变指数 /wind shear exponent 用于描述风速剖面线形状的幂定律指数。
风能的优缺点英文作文
风能的优缺点英文作文英文：Wind energy is a renewable source of energy that has gained popularity in recent years. As with any energy source, wind energy has its advantages and disadvantages.Advantages:1. Clean and renewable: Wind energy does not produceany harmful emissions or pollutants, making it a clean and sustainable source of energy.2. Cost-effective: Once the wind turbines are installed, the energy produced is essentially free. This makes wind energy a cost-effective option for generating electricity.3. Job creation: The wind energy industry has created thousands of jobs in manufacturing, installation, and maintenance of wind turbines.Disadvantages:1. Intermittent: Wind energy is dependent on wind speed, which can vary greatly throughout the day and seasonally. This means that wind energy cannot be relied upon as a constant source of energy.2. Wildlife impact: Wind turbines can pose a threat to birds and bats, which can collide with the blades.3. Visual impact: Some people find wind turbines to be unsightly and a blight on the landscape.Overall, wind energy has many advantages, but it also has some drawbacks. It is important to carefully consider these factors when deciding whether or not to invest inwind energy.中文：风能是一种可再生能源，近年来越来越受到关注。
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。
风能介绍外文翻译
historyof early wind t00 kW30 mdiameter
附录
Wind Energy Introduction
1.1 Historical Development
Windmills 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 theUSAin 1941. This remarkable machine had a steel rotor53 min diameter, full-span pitch control and flapping blades to reduce loads. Although ablade spar failed catastrophically in 1945, it remained the largest wind turbine constructed for some 40 years (Putnam, 1948).
关于风能的英文文章
关于风能的英文文章1.Wind energy is a clean and renewable source of energy derived from solar radiation and temperature differences between the surface of the Earth and the atmosphere. It is abundant in many parts of the world, particularly in open areas both on land and at sea. With technological advancements and increased demand for renewable energy sources, wind energy has become an important source of electricity.Wind energy generation converts wind energy into electricity. Wind farms typically consist of a series of large wind turbines, known as turbines or windmills. When the wind blows through these turbines, they rotate and drive generators to produce electricity.Wind energy generation has many advantages. Firstly, it is renewable, meaning it does not deplete natural resources. Secondly, wind energy generation does not emit greenhouse gases and other harmful substances, making it environmentally friendly. In addition, wind energy generation can reduce dependence on fossil fuels, thereby reducing dependence on imported energy and enhancing energy security.However, there are also some challenges and limitations to wind energy generation. Firstly, wind speed is unstable, so the power output of a wind farm is also unstable. In addition, the construction and maintenance of wind farms require significant capital investment and expertise. Furthermore, some people argue that wind energy generation may pose a threat to birds and other animals.Despite these challenges, with ongoing technological advancements and increased demand for renewable energy sources, the role of wind energy generation in global energy supply is becoming increasingly important. In the future, with the development of more efficient and reliable wind energy technologies and advanced grid technologies, the prospects for wind energy generation will become even more optimistic.风能是一种清洁、可再生的能源，它来源于太阳辐射和地球表面的温差。
风能的优缺点英文作文
风能的优缺点英文作文英文：Wind energy is a renewable energy source that hasgained popularity in recent years due to its numerous advantages. One of the main advantages of wind energy isthat it is clean and does not produce any harmful emissions or pollutants. This makes it a great alternative to fossil fuels, which contribute to air pollution and climate change.Another advantage of wind energy is that it is abundant and widely available. Wind turbines can be installed in various locations, including offshore and onshore, and they can generate electricity even in areas with low wind speeds. This means that wind energy can be harnessed in many partsof the world, making it a versatile and reliable source of energy.However, wind energy also has some disadvantages. Oneof the main drawbacks is that it is intermittent, meaningthat it cannot generate electricity continuously. Wind speeds can vary throughout the day and night, and this can affect the amount of energy that can be generated. This makes wind energy less reliable than other sources of energy, such as coal or nuclear power.Another disadvantage of wind energy is that it can have negative impacts on wildlife and the environment. Wind turbines can be dangerous to birds and bats, and they can also disrupt ecosystems by altering wind patterns and noise levels. Additionally, the construction and maintenance of wind turbines can have negative impacts on local communities and landscapes.Overall, wind energy has both advantages and disadvantages. While it is a clean and abundant source of energy, its intermittent nature and potential negative impacts on wildlife and the environment must be carefully considered.中文：风能是一种可再生能源，由于其众多优点而在近年来变得越来越受欢迎。
有关风能发电的英语作文
有关风能发电的英语作文英文回答：Wind energy is a rapidly growing source of renewable energy that has the potential to provide a significant portion of the world's electricity needs. It is a clean, sustainable, and cost-effective way to generate electricity, and it can help to reduce our dependence on fossil fuels.Wind turbines convert the kinetic energy of the windinto electrical energy. The turbines are mounted on towers, and the blades rotate when the wind blows. The rotation of the blades turns a generator, which produces electricity.Wind energy is a variable resource, which means that it is not always available. However, the wind can be predicted with reasonable accuracy, and wind turbines can be sited in areas where the wind blows frequently.Wind energy is a relatively new technology, but it israpidly becoming more efficient and cost-effective. The cost of wind energy has fallen significantly in recent years, and it is now competitive with other forms of renewable energy, such as solar energy.Wind energy has a number of advantages over other forms of renewable energy. It is a clean source of energy, and it does not produce any greenhouse gases. Wind turbines are also relatively quiet, and they can be sited in areas where they will not have a negative impact on the environment.Wind energy is a promising source of renewable energy that has the potential to make a significant contribution to the world's energy needs. It is a clean, sustainable, and cost-effective way to generate electricity, and it can help to reduce our dependence on fossil fuels.中文回答：风能是一种增长迅速的可再生能源，它有可能为世界提供大量的电力需求。
风力发电词汇汇总
尺度为月、季、年、数年到数百年以上。气候以冷、暖、干、湿这些特征来衡 量，通常由某一时期的平均值和离差值表征。
海洋性气候：Ocean climate [EUSEn] [klaimit] 中文定义：海洋邻近区域的气候。 大陆性气候：Continental climate [kOntinentl] [klaimit] 中文定义：通常指处于中纬度大陆腹地的气候，一般也就是指温带大陆性气候。 露天气候：Open-air climate [klaimit] 室内气候：Indoor climate [indO ] [klaimit] 年最高：Annual maximum [QnjuEl] [mQksimEm] 年最高日平均温度：Annual extreme daily mean of temperature [tempritSE] 月平均温度：Mean monthly temperature [mi n] [mVnTLi] [tempritSE] 日平均值：Daily mean [deili] [mi n] 极端最高：Extreme maximum [ikstri m] [mQksimEm] 空气湿度：Air humidity [HJU Miditi] 中文定义：表示空气中水汽含量或干湿程度的物理量。
环境：Environment[invaiEREnmEnt] 中文定义：人们所在的周围地方与有关事物，一般分为自然环境与社会环境。 环境温度：Ambient temperature [QMbiEnt] [tempritSE] 中文定义：表示环境冷热程度的物理量。 工作环境：Operational environment [OpEReiSEnl] [invaiEREnmEnt] 中文定义：指对制造和产品质量有影响的过程周围的条件。 气候：Climate[klaimit] 中文定义：气候是长时间内气象要素和天气现象的平均或统计状态，时间
关于风能的英文作文
关于风能的英文作文英文：Wind energy is a renewable energy source that has been gaining popularity in recent years. It is a clean and sustainable alternative to fossil fuels, and has the potential to significantly reduce our carbon footprint. In this essay, I will discuss the advantages and disadvantages of wind energy, as well as its potential for future development.One of the main advantages of wind energy is its cost-effectiveness. Once a wind turbine is installed, it has a relatively low operating cost, as it does not require fuel or water to generate electricity. In addition, wind energy is a domestic resource, which reduces our dependence on foreign oil. Another advantage is that wind turbines can be located in remote areas, where traditional power plants are not feasible. This can provide electricity to rural communities and reduce the need for expensive transmissionlines.However, there are also some disadvantages to wind energy. One of the main challenges is the intermittent nature of wind. Wind turbines only generate electricity when the wind is blowing, which can be unpredictable. This means that wind energy cannot be relied upon as a constant source of power, and must be supplemented with other forms of energy. Another disadvantage is that wind turbines can be noisy and may impact wildlife, particularly birds and bats.Despite these challenges, wind energy has great potential for future development. Advances in technology have made wind turbines more efficient and cost-effective, and there is still room for improvement. In addition, wind energy can be combined with other renewable energy sources, such as solar and hydro power, to create a more reliable and sustainable energy system.Overall, wind energy is a promising alternative to fossil fuels, but it is not without its challenges. As wecontinue to develop and improve upon wind energy technology, we can work towards a cleaner and more sustainable energy future.中文：风能是一种可再生能源，近年来越来越受到关注。
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。
有关风能发电的英语作文
有关风能发电的英语作文英文回答：Wind energy is a form of renewable energy that harnesses the power of the wind to generate electricity. It is a clean and sustainable source of energy that does not produce any emissions or waste. Wind turbines, which are used to convert the kinetic energy of the wind into electrical energy, are typically installed in windy areas, such as coastal regions, mountain passes, and open fields.One of the main advantages of wind energy is its cost-effectiveness. Wind turbines have become increasingly efficient and affordable over the years, making wind energy one of the most competitive renewable energy sources. Additionally, wind energy is a reliable source of energy, as wind is a relatively predictable resource.However, wind energy also has some disadvantages. One of the main challenges is that wind power is intermittent,meaning that it is not always available when needed. This can be overcome by integrating wind energy with other renewable energy sources, such as solar energy, which is available during the day when wind power is typically less available.Another challenge with wind energy is that wind turbines can have a negative impact on wildlife,particularly birds and bats. However, there are a number of measures that can be taken to mitigate this impact, such as siting wind turbines in areas where there is less wildlife activity and using bird deterrents.Overall, wind energy is a promising renewable energy source that has the potential to make a significant contribution to meeting our global energy needs. It is a clean, sustainable, and cost-effective source of energythat can help us to reduce our reliance on fossil fuels.中文回答：风能是一种可再生能源，利用风力发电。
风能介绍英语作文150字
风能介绍英语作文150字Wind energy is a renewable and sustainable source of power that harnesses the kinetic energy of the wind to generate electricity. It is an increasingly popular alternative to fossil fuels due to its environmental benefits and abundance. Here are some key points about wind energy:1. Renewable Nature: Wind energy is renewable becauseit relies on the natural movement of air, which is inexhaustible. Unlike fossil fuels, which are finite and contribute to pollution and climate change, wind energy provides a clean and endless power source.2. How It Works: Wind turbines are used to capture the energy from the wind. These turbines have large blades that spin when the wind blows. The spinning motion drives a generator, which converts the kinetic energy into electricity. This electricity can then be used to power homes, businesses, and even entire communities.3. Environmental Benefits: Wind energy is environmentally friendly because it produces no greenhouse gas emissions or air pollutants during operation. By using wind power instead of fossil fuels, we can reduce ourcarbon footprint and mitigate the effects of climate change. Wind energy also helps to conserve water resources, as it requires no water for cooling, unlike traditional power plants.4. Abundance: Wind energy is abundant in many parts of the world, particularly in coastal areas and open plains. With advancements in technology, offshore wind farms are becoming increasingly feasible, tapping into strong and consistent winds over the ocean. This abundance makes wind energy a reliable and scalable solution for meeting our energy needs.5. Economic Benefits: Wind energy also brings economic benefits to communities. The development and operation of wind farms create jobs in manufacturing, construction, and maintenance. Additionally, wind energy can help todiversify local economies and reduce dependence on imported fossil fuels, thus enhancing energy security.In conclusion, wind energy offers a sustainable and environmentally friendly solution to our energy needs. By harnessing the power of the wind, we can reduce greenhouse gas emissions, mitigate climate change, and create a cleaner and healthier planet for future generations.。
风电专用英语介绍
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平安风速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外表温度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电力聚集系统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度电本钱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平安阀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啮合干预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平安联轴器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平安方案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-平安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根底接地体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平安系统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平安性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剩余电流residual current平安阻抗safety impedance平安距离safety distance平安标志safety marking平安色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平安隔离变压器safety isolating transformer避雷器surge attester ; lightning arrester保护电容器capacitor for voltage protection平安开关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平安帽safety helmet平安带safety belt绝缘手套insulating glove绝缘靴insulating boots护目镜protection spectacles缝焊机seam welding machine【本文档内容可以自由复制内容或自由编辑修改内容期待你的好评和关注，我们将会做得更好】。
关于风能的英语作文（5篇）
关于风能的英语作文（5篇）第一篇：关于风能的英语作文wind energyKinetic energy produced by earth surface large amount of air flow.The steam contents are different in diversity and air since the floor accepts sun irradiation queen airtemperature change everywhere, difference arousing everywhere pressure as a result, area flows to low pressure , is to form wind in high-handed air of level direction.Wind energy source resource decides the Yu Feng Neng density sum but the wind energysource year making use of accumulates hour number.Wind energy source density is that the unit faces the wind covering an area of the groundless power gaining , the cube and air density direct proportion with wind speed concern.Evidence is estimated, the whole world wind energy source all quantity about 130 billion kilowatt , Chinese wind energy source all quantity about 1,600,000,000 kilowatt.Wind energy source resource accepts the landform effect more, world wind energy source resource is many contraction zone focusing on littoral and open continent, Inner Mongolia , Xinjiang and Gansu Province area wind energy source resource enrich Chinese southeast along the coast, also very much if American California composes in reply along the bank a few Northern Europe countries.Littoral and neighbouring Chinese southeast island and islet wind energysource density may amount to 300 watts of/ rice 3 ~ 20 meters of/ second of wind speed year accumulative totals exceed 6000 hours above 2(W／m2).Best inner Lu Feng Neng resource area, one takes along Inner Mongolia to Xinjiang, wind energysource density also is in 6000 hours of 200 ~ 300 W／m2 , 3 ~ 20 meters of/ second of wind speed year accumulated 5000 ~.These area is suitable for developing wind power generating electricity preparing wind power carrying water.That Xinjiang reaches the hill slope city wind power power station already packing machine in 1992 is a maximal Chinese wind power power station 5,500,000 watts.The sources of energy the middle, wind in Nature to be that one kind of regenerate , the nothing contaminate and reserves are gigantic.With the fact that the global climate is changed into the warm energy crisis,stepping up to the wind power exploitation and making use of in every country , cut down a carbon dioxide to the full waiting for green-house gas emission , protect the earth on which we rely for existing.The windenergy source making use of is two kinds forms mainly assume driving force with the wind energy source preparing wind power generating electricity , generate electricity among them with wind power give first place to,Assume driving force with the wind energy source , be to make use of wind to come to set various mechanism in motion directly, waiting for this wind power engine merit if drive a water pump to carry water is: Investment is few , work efficiency is tall , economy is durable.At present, make an appointment with in the world having one Baiduowan stage manner to mention water machine strenuously in turn over.Many grazing land of Aussie, set up have this wind power to mention water machine.In many countries of wind powerabound in natural resources, scientists making use of the wind power engine to chop fodder , grinding face and processing feed and so on.The application making use of wind power togenerate electricity, with Denmark is the earliest , usage is more common and.Be that world wind energy source electric power generation Great Power and electric power generation wind wheel produce Great Power but though Denmark only having more than 5,000,000 population,the manufacturer world 10 gales wheels are produced has 5 being in Denmark , the world 60% the above wind wheel manufactory technology all in using Danish, is “pinwheel Great Power ” true to self's name.风能(wind energy)地球表面大量空气流动所产生的动能。
英语作文--翻译--风能
风是一种潜力很大的新能源。
风能(wind energy)既清洁又可再生，所以越来越受到世界各国的重视。
我国的风力资源极为丰富，绝大多数地区的平均风速都在每秒3米以上。
早在20世纪70年代，中国就开始了发展风力发电(wing power)的努力。
到2010年，中国风电装机容量(installed wind power capacity)超过美国，成为风力发电的第一大国。
风力发电为保护环境做出了巨大的贡献。
The wind is a kind of new energy which possesses great potential. Wind energy is clean and renewable, so more and more win the attention of the countries all over the world. Wind resource is very abundant in our country, the average wind speed in most areas is more than three meters per second. In the early 1970 s, China commences efforts to exploit wind power. By 2010, since the installed wind power capacity more than the United States, China became the first power of wind power generation. The wind power made a great contribution to protect the environment.。
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Wind Energy Introduction 1.1 Historical Development Windmills 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 ablade 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 mdiameter 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