电力系统稳定器pss的设计与仿真论文

目录

摘要.......................................................... I ABSTRACT.................................................. I I 1 绪论.. (1)

1.1 课题的意义 (1)

1.2 电力系统稳定 (3)

1.2.1 电力系统稳定性的分类 (3)

1.2.2 提高电力系统稳定的措施 (4)

1.2.3 励磁系统对电力系统稳定的影响 (5)

1.3 MATLAB的简介 (6)

1.4 本论文的主要工作 (7)

2 同步发动机方程 (8)

2.1 同步发动机的电压方程 (8)

2.2 同步发电机的磁链方程 (9)

2.3 同步发电机的电磁功率方程 (13)

2.3.1 隐级式发电机的电磁功率方程 (13)

2.3.2 凸极式发电机的电磁功率方程 (16)

2.4 同步发电机的转子运动方程 (17)

2.4.1 同步发电机的转子运动方程 (17)

2.4.2 发电机转子运动方程的研究意义 (18)

2.5 本章小结 (18)

3 电力系统稳定器基本介绍 (19)

3.1 电力系统稳定器简介 (19)

3.2 电力系统弱阻尼产生原因 (20)

3.3 低频振荡简介 (20)

3.4 电力系统稳定器抑制低频振荡原理 (21)

3.5 本章小结 (22)

4 PSS的设计 (22)

4.1 电力系统稳定器的设计原理 (23)

4.1.1 PSS网络的设计 (23)

4.1.2 汽轮机及其调节系统超前补偿网络的设计 (24)

4.2 本章小结 (25)

5 电力系统稳定器MATLAB仿真分析 (26)

5.1 简单电力系统的建立 (26)

5.2 模型运行仿真分析 (29)

5.3 PSS作用分析 (32)

5.4 本章小结 (32)

6 主要结论和展望 (33)

6.1 主要结论 (33)

6.2 展望未来 (33)

致谢 (34)

参考文献 (35)

附录 (36)

附录A 外文文献原文 (36)

附录B 外文文献翻译 (38)

附录C 主要源程序 (41)

摘要

随着我国电力工业的迅速发展，电力系统规模日趋增大，电压等级进一步提高，装机容量和用电负荷不断增大，同时，风能,太阳能等一些新能源发电所占发电比重的增大，电力系统的稳定运行变得越来越突出。随着大电网的互联，电力系统容量倍增，以及快速励磁装置的广泛使用，大电网存在的问题逐步凸显出来，英美等国都发生过大规模停电事故，各国对大电网存在的问题也越来越关注，其中大电网的稳定性一直是专家们关注的重点，低频振荡是影响电网稳定性的重要因素，对低频振荡抑制早在70年代就有了比较成熟的方法，其中最具典型的是采用电力系统稳定器（PSS）。

电力系统稳定器（pss）就是为抑制低频振荡而研究的一种附加励磁控制技术。它在励磁电压调节器中，引入领先于轴速度的附加信号，产生一个正阻尼转矩，去克服原励磁电压调节器中产生的负阻尼转矩作用,用于提高电力系统阻尼、解决低频振荡问题，是提高电力系统动态稳定性的重要措施之一。

本文先从理论出发，详细分析了同步发电机的电压方程和磁链方程并推导了简单系统中同步发电机的电磁功率方程以及同步发电机的转子运动方程。并在此基础上建立单机无穷大系统的MATLAB模型，并将它作为研究对象，具体分析PSS对系统稳定性的作用，然后又分析了系统带PSS和不带PSS时系统的运行情况，最后对两种情况进行了比较，分析了PSS的优点和缺点，同时对电力系统的未来提出了更高的挑战。

本文还介绍了电力系统稳定器的设计原理和对电力系统造成的影响、使用电力系统稳定器的好处。由于电力系统在正常运行时会发生频率的振荡，对我们的生产生活带来了很多的危害，给我国的国民经济造成了巨大的损失。如果在电力系统中加入PSS后会对系统的稳定性提高给予了很大的帮助。

关键词：电力系统稳定；低频振荡；负阻尼；电力系统稳定器

ABSTRACT

With the rapid development of China's power industry, the size of the power system is increasing day by day, to further improve the voltage level, increasing installed capacity and electricity load, wind, solar and other new energy power generation share of power generation the proportion of the increase of electricity the stable operation of the system becomes more and more prominent. With the interconnection of large power grids, doubled the capacity of the power system, as well as the widespread use of fast excitation device, the problems of a large grid has been showing, Britain and other countries have been large-scale blackouts, more and more countries the problems of large power grids concern the stability of large power grids has been the focus of the experts, low-frequency oscillation is an important factor affecting grid stability, low frequency oscillation suppression will have a more mature approach as early as the 1970s, the most typical is power system stabilizer (PSS).

Power system stabilizer (PSS) is to suppress a low frequency oscillation of additional excitation control. It is the excitation voltage regulator, the introduction of axial velocity ahead of additional signals to produce a positive damping torque to overcome the primary excitation voltage regulator produced negative damping torque effect. Improving power system damping, lowing frequency oscillation problem solving is to improve power system dynamic stability of the important measures.

The topics start with theory, a detailed analysis of the synchronous generator voltage equation and flux equation and derivation of the equations of the electromagnetic power of the synchronous generator in a simple system and synchronous generator rotor equation of motion. MATLAB model of single machine infinite bus system and on this basis to establish it as the object of study, the specific analysis of the role of the PSS on the stability of the system, and then analyzed the system with PSS and without PSS operation of the system, and finally Of the two cases were compared and analyzed the advantages and disadvantages of PSS, while the future of the power system of a higher challenge.

This paper describes the power system stabilizer's design principles and the impact on the power system, the use of the benefits of power system stabilizer. The frequency of oscillation maybe happen to power system when the system In the normal operation.It gives a great help if the power system after the addition of PSS.

Keywords ：power system stability；low frequency oscillation；negative damping；power system stabilizer