Study on Application of Morlet Complex Wavelet in Digital Protective Relays

被引：0
|
作者：
Li Zhongwei [1 ]
Cheng Li [2 ]
Tong Weiming [1 ]
机构：
[1] Harbin Inst Technol, Dept Elect Engn, POB 401, Harbin, Heilongjiang, Peoples R China
[2] Harbin Engn Univ, Sch Sci, Harbin, Heilongjiang, Peoples R China
来源：
2009 INTERNATIONAL CONFERENCE ON SUSTAINABLE POWER GENERATION AND SUPPLY, VOLS 1-4 | 2009年
关键词：
amplitude of fundamental component; difference filter; Morlet complex wavelet; digital protective relays;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
To overcome the disadvantages of full-wave Fourier algorithm that can not filter decaying DC component and has bad frequency characteristic, Morlet complex wavelet amplitude algorithm is studied. After analyzing the influence of parameters m, c and N to Morlet complex wavelet amplitude algorithm and the question that one-circle Morlet complex wavelet amplitude algorithm can not filter the two times harmonic component, difference filter adding one-circle Morlet complex wavelet amplitude algorithm is presented. The performance of full-wave Fourier algorithm, difference filter adding one-circle Morlet complex wavelet amplitude algorithm and three-circle Morlet complex wavelet amplitude algorithm are compared by simulation. The results of simulation indicate that Morlet complex wavelet amplitude algorithm can filter decaying DC component, has better frequency characteristic and higher calculating precision. It can acquire more precise results than the full-wave Fourier algorithm.
引用
收藏
页码：2574 / +
页数：2
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