摘要
为验证Prony分析方法对低频振荡问题研究的有效性,首先对Prony分析方法进行描述,提出了主要参数选取方法,包括采样频率,信号时间长度和模型阶数,并对单机无穷大系统进行仿真分析,利用Prony分析方法对系统模型进行识别和简化,得到了一个准确的三阶系统模型。对4机2区系统进行了仿真,利用Prony方法提取振荡特征,准确辨识出低频振荡的模式,并对其进行预测分析,结果与实测基本吻合。
In order to prove that the method of Prony analysis is efficiency to low frequency oscillation problems,the Prony analysis method was described firstly,and the method of main parameter selection is proposed,including sampling frequency、length of time as well as model number of steps.The simulation of single machine infinite system is analyzed in this article,the system model is identified and simplified through Prony analysis,and 4 machine 2 area system is also simulated,oscillation characteristics can be extracted and the model of low frequency oscillation can be recognized accurately,the waveform of the system is predicted,the result coincides with practical situation essentially.
出处
《电力学报》
2011年第1期17-21,28,共6页
Journal of Electric Power
关键词
电力系统
低频振荡
PRONY分析
系统仿真
参数选择
power system
Prony analysis
low frequency oscillation
system simulation
parameter selection
