滑窗Prony算法的时变振荡特性分析方法  

The Analysical Method of Time-varying Oscillation Characteristic of Silding Window Porny Algorthm

作　　者：杨利波 杨芳 

机构地区：[1]湖南省电网工程公司,湖南衡阳421002 [2]广东电网清远供电局,广东清远511500

出　　处：《电气开关》2013年第3期54-56,59,共4页Electric Switchgear

摘　　要：Prony算法可以提取平稳信号的振荡频率和阻尼,但不能正确反映时变信号的振荡特性。而现实的低频振荡往往具有多模式时变的特点,而且存在模式复合现象。提出滑窗Prony算法分析时变振荡信号,通过窗口滑动观察振荡信号的时变特点。算例说明,滑窗Prony算法能较好的分析低频振荡的多模式的时变特性,更适合实际电力系统振荡信息分析。Prony algorithm can extract oscillation frequency and damping of the smooth signal, but can not accurately re- flect the oscillation characteristics of the time-varying signal. The real low-frequency oscillations usually have multi-mode time-varying characteristics and there may exist the composite mode. The time-varying oscillation signal with the sliding window Prony algorithm analysis is proposed. Sliding the window to observe the time-varying characteristics of the oscilla- tion signal. Calculations have proved that the sliding window Prony algorithm can better analyze the time-varying charac- teristics of the low frequency oscillation mode, which is more suitable for the oscillation information analysis of the actual power system.

关 键 词：电力系统 低频振荡 窗口滑动 PRONY 

分 类 号：TM711[电气工程—电力系统及自动化]