摘要
本文提出用描述函数法来分析电力系统低频振荡和电力系统稳定器（ＰＳＳ）对低频振荡的抑制作用。运行结果表明，此法比经典法有更多的优越性。
The influenc of a proportional automatic excitation regulator(AER ) on thelow-freqency oscillation was analysed by fneans of the describing function method.The factshows that the method has more advantages than the classical and traditional method。
关键词
描述函数
电力系统
低频振荡
the describing function
power system
low-frequency oscillation
