Study on Failure of PSS Caused by Instability of Close Mode Shapes
Low frequency oscillation has been a serious threat to the security and stability of power system operation today.PSS is an effective damping controller to inhibit low frequency oscillation and has been widely used in power system.Location installation of PSS is mostly determined by the participation factors which can be calculated by right eigenvectors (lower frequency oscillation mode shapes) and left eigenvectors.However,in an n-machine system,there are n-1 low frequency oscillation modes whose frequencies are distributed in a small range of 0.2-3.0Hz,which leads close mode may occur.Study has shown that close mode shapes are sensitive to system structural parameters,that is,a small change of structural parameters may lead a big change of close mode shapes.This paper first theoretically analyze the failure of PSS led by the instability of close mode shapes,then New England 10-machine system is employed to validate the conclusion.
power system low frequency oscillation close mode PSS
Hu Yongqiang Zhao Shuqiang Ma Yanfeng
Department of Electrical Engineering North China Electric Power University Baoding,China
国际会议
威海
英文
1747-1750
2011-07-06（万方平台首次上网日期，不代表论文的发表时间）