基于Prony方法的电力系统低频振荡分析  

Analysis on Low Frequency Oscillation of Power System Based on Prony Method

作　　者：白洋[1] 李国庆[1] 姚天亮[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《四川电力技术》2009年第1期40-41,73,共3页Sichuan Electric Power Technology

摘　　要：电力系统低频振荡时常发生,准确提取振荡频率成为抑制其发生的前提。介绍了Prony方法的计算过程以及如何提高Prony分析方法的准确性,通过与电力系统中已有算法的比较,分析了Prony方法在电力系统中的适用性。成功的应用Prony方法检测到了PSASP中8机系统的主导低频振荡模式,算例结果表明,该方法实用、有效、准确性较高,完全能满足实际应用的需要,是一种有效的工具。The low frequency oscillations in power system often occur. The accurate extraction of oscillation frequency becomes the premise which suppresses it to occur. The computation process of Prony method and how to enhance the accuracy of Prony analysis method are introduced. Compared Prony method with other existing algorithms used in power system, the serviceability of Prony analysis method in power system is analyzed. And Prony method is successfully applied to detect the dominant modes of low frequency oscillations of the 8 - machine system in PSASP. The example results indicate that the method is practical, effective and has a higher accuracy. It can satisfy the need of practical application completely, and it is an effective tool.

关 键 词：低频振荡 PRONY分析 主导低频振荡模式 功角曲线 

分 类 号：TM761[电气工程—电力系统及自动化]