瀑布沟机组PSS对四川电网低频振荡的影响  

Effects of Pubugou PSS on Low Frequency Oscillation of Sichuan Power Grid

作　　者：徐梅梅[1] 王渝红[1] 李兴源[1] 郑希云[1] 张雪梅 

机构地区：[1]四川大学电气信息学院,成都610065 [2]四川省电力公司超高压运行检修公司,泸州646000

出　　处：《电力系统及其自动化学报》2010年第6期6-11,共6页Proceedings of the CSU-EPSA

基　　金：国家科技支撑计划项目(2008BAA13B01)

摘　　要：以川渝电网2010年丰大运行方式为背景,重点研究瀑布沟水电机组加装PSS对四川电网小干扰稳定性的影响。通过Prony辨识从时域仿真曲线中提取系统振荡模式的特征信息,结合相位补偿原理对瀑布沟机组PSS参数进行初步整定,比较分析各种故障条件下PSS投运前后系统特性及主振模式的变化情况。仿真结果和Prony分析表明,瀑布沟机组加装PSS可以显著提高系统阻尼,有效抑制四川电网现有的区域间低频振荡。Taking Chuan-yu power grid under both flood season and large power flow in the year of 2010 for background,this paper focus on the impact of small signal stability in Sichuan power grid by PSS of Pubugou hydroelectric unit.The feature information on system oscillation modes can be extracted by Prony identification from the time domain simulation curve.PSS parameters of Pubugou unit are designed by principle of phase compensation.Then under various fault conditions,through a comparative analysis of the system characteristics and main vibration mode changes of pre and post PSS operation,the simulation and Prony identification results show that Pubugou unit PSS can significantly improve system damping and effectively inhibit the low frequency oscillation in Sichuan power grid.

关 键 词：小干扰稳定 PRONY分析 电力系统稳定器 相位补偿 区域间低频振荡 

分 类 号：TM712[电气工程—电力系统及自动化]