On-line identification of low-frequency oscillation properties based on envelope fitting

被引：5
作者：
Ma, Yanfeng [1 ]
Liu, Weidong [1 ]
Zhao, Shuqiang [1 ]
机构：
[1] School of Electrical and Electronic Engineering, North China Electric Power University, Baoding
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2014年 / 38卷 / 23期
关键词：
Empirical mode decomposition (EMD); Envelope fitting; Low-frequency oscillation; Property identification;
D O I：
10.7500/AEPS20131022005
中图分类号：
学科分类号：
摘要：
Accurately detecting the properties of low-frequency oscillation is important to suppressing power system oscillations and reducing its harms during a low-frequency oscillation. By an analysis of the characteristics of low-frequency oscillation curves with different mechanisms, this paper presents an oscillation property identification method based on envelope fitting. Firstly, the dominant mode oscillation curve of the vibration signal is extracted by the empirical mode decomposition (EMD) method. Then the envelope of the dominant mode signal extracted is fitted. Based on the fitting error, the properties of oscillations are determined. The process and the realization method for property identification are given. The validity of the method proposed is verified through both simulation data and actual data recorded by the wide area measuring system. ©, 2014 State Grid Electric Power Research Institute Press.
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页码：46 / 53and95
页数：5349
相关论文
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