基于广域测量系统的电力系统低频振荡的抑制研究  

Rejection of Low Frequency Oscillation in Power Systems Based on WAMS

作　　者：刘斌[1] 杨培宏[1] 张玉杰[1] 

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010

出　　处：《电气技术》2013年第2期36-40,共5页Electrical Engineering

摘　　要：提出了一种基于广域测量系统的附加励磁阻尼控制器(Supplementary Excitation Damping Controller,SEDC),以提高电网系统振荡阻尼的方法。对于电力系统低频振荡信号的非线性、非平稳的特性,采用改进的HHT(Hilbert-Huang Transform)方法在线辨识低频振荡的模态,根据在线辨识结果利用粒子群优化算法对控制器中的电力系统稳定器(Power System Stabilizer,PSS)进行参数优化,从而在暂态运行的情况下提供有效阻尼,抑制低频振荡。通过仿真结果证明,此控制器可以更好的提高系统的稳定性。The paper introduces a supplementary excitation damping controller based on WAMS（wide area measurement system）which in order to enhance the damping of Grid System oscillation. For the property of non-linear, non-stationary low frequency oscillation signals, using improved HHT method for on line identification of low frequency oscillation. A particle swarm optimization algorithm is used to parameter optimization of the controller in power system stabilizer by the identification result. The adaptive PSS provides effective damping in the case of transient operation and reject the low frequency oscillation. The results of simulation model show that SEDC could improve power system stability better.

关 键 词：低频振荡 广域测量系统 粒子群优化算法 电力系统稳定器 

分 类 号：TM712[电气工程—电力系统及自动化]