基于Prony算法的发电机组间功率低频振荡在线辨识新方法  

New Method of Low-frequency Oscillation Online Identification of Power Generators Based on Prony Algorithm

作　　者：刘森[1] 于赞梅[2] 桑天松 

机构地区：[1]河北省电力勘测设计研究院,石家庄050031 [2]国网河北省电力公司石家庄供电分公司,石家庄050051 [3]国网冀北电力有限公司,北京100053

出　　处：《河北电力技术》2014年第1期21-24,共4页Hebei Electric Power

摘　　要：针对Prony算法抑噪能力差、计算效率低的问题,分析Prony算法的原理和主要参数的选择策略,提出一种基于Prony算法的发电机组间功率低频振荡在线辨识新方法,从模型有效阶数确定、AR参数估计、数据预处理等方面说明该方法的计算步骤,通过算例仿真及结果分析,认为该方法能够满足电力系统低频振荡在线辨识的需要。As the traditional algorithm is sensitive to noise and has ineffective calculation, the basic principle of Prony algorithm is introduced in this paper,a new Prony method for online analysis of low-frequency oscillations between power generators is discussed in this paper.The calculation steps of the method are described by way of the identification of the practical order of the model, estimation of the parameters and the preproeess of the signal.The simulation results show that this method can meet the needs of low-frequency oscillations online identification.

关 键 词：PRONY算法 发电机组 低频振荡 在线辨识 

分 类 号：TM743[电气工程—电力系统及自动化]