摘要
广域测量系统提供的电力系统实测动态响应为动态特性的分析提供了新的途径,避免了建模和确定参数的困难。ARMA谱估计是现代谱估计算法的一种。本文应用ARMA谱估计算法分析电力系统低频振荡曲线,能够从曲线中直接提取系统的特征根。分析计算表明算法具有较高的精度。适用于处理存在弱阻尼或负阻尼模式时由随机扰动激励的振荡过程。
Wide-area Measurement System provides novel method to power system dynamic performance analysis,avoiding the difficulties of modeling and getting parameters.ARMA is an important modem power spectral analysis algorithm.An approach based on ARMA is proposed to analysis the low frequency oscillation trajectory of power system.The eigenvalue can be calculated directly from the trajectory. Digital simulation shows that the approach can give good resolution and suitable analysis of weak or negative mode with random stimuli.
出处
《河南电力》
2007年第1期8-9,50,共3页
Henan Electric Power
关键词
ARMA
特征根
电力系统
低频振荡
阻尼
ARMA
eigenvalue
power system
low frequency oscillation
damping
