多机系统PSS选址方法分析与对比  

Analysis and Comparison of PSS Deployment in Multi-machine Power System

作　　者：吴涵[1] 肖翀[1] 马进[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《现代电力》2012年第2期1-5,共5页Modern Electric Power

基　　金：国家自然科学基金项目(51077049;50707009);北京市科技新星计划;"111"引智计划(B08013)资助

摘　　要：电力系统低频振荡是影响互联大电网运行的重要问题,电力系统稳定器(PSS)被广泛应用于抑制负阻尼引发的低频振荡,但是多机电力系统中如何布点PSS,从而更有效地抑制低频振荡是一个尚未解决的问题。文章详述了两种PSS选址方法,即参与因子法和特征值灵敏度法,利用特征值分析求出系统的状态矩阵,并在此基础上得到参与因子以及状态矩阵对任意参数的偏导数。通过对这两种方法原理的分析对比,指出了它们各自的优缺点及适用范围。最后利用典型两区域四机算例,分别求取所关心低频振荡模式的参与因子及灵敏度,验证了两种方法对于特定的低频振荡模式主导机判断的准确度,并对产生所得结果的原因进行了讨论分析。The low frequency oscillation has great impact on the operation of large scale interconnected power system,and the Power System Stabilizer（PSS） is widely applied to inhibit the low frequency oscillation under negative damping.However,how to deploy PSS in multi-machine power system to stabilize low frequency oscillation is the urgent problem to be solved.In this paper,two kinds of PSS deployment methods,the participation factor method and the eigenvalue sensitivity method are discussed.The state matrix of the system is obtained by applying eigenvalue analysis,based on which the participation factors and the partial derivatives of the state matrix to any parameters are computed.Through the analysis and comparison of both methods,their advantages and disadvantages and application scope are pointed out.In the end,the benchmark two-area four-machine system is taken as example to get the participation factors and sensitivity of interested low frequency oscillation.The results testify the accuracy of the dominant machine judgment for specified low-frequency oscillation mode by using of both methods,and the affecting factors are analyzed and discussed.

关 键 词：低频振荡 主导机 电力系统稳定器 参与因子 特征值灵敏度 

分 类 号：TM712[电气工程—电力系统及自动化]