Fault Line Selection in Resonant Earthed System Based on Morphological Peak-Valley Detection

被引：0
|
作者：
Shu H. [1 ]
Huang H. [1 ]
Tian X. [1 ]
Dong J. [2 ]
Huang R. [3 ]
机构：
[1] Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming
[2] School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin
[3] Power Science Research Institute of Yunnan Power Grid Co. Ltd., Kunming
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2019年 / 43卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Fault line selection; Feature band; Mathematical morphology; Peak-valley detection; Resonant earthed system; Transient component;
D O I：
10.7500/AEPS20180506005
中图分类号：
学科分类号：
摘要：
Transient electrical quantity information is very abundant when single-phase grounding fault occurs in resonant earthed system. The short window data of 1/4 period of zero sequence current fault of each line are transformed by wavelet transform. The frequency band of power frequency is eliminated and the feature frequency band is selected according to the principle of maximum energy sum. The reconstructed wavelet coefficients under the feature frequency band are checked by morphological peak-valley detection.The peak-valley characteristic of the fault feeder is opposite to that of the total feeders, which is used as the fault line selection criterion. The simulation analysis and practical verification demonstrate the feasibility and effectivity of this method. © 2019 Automation of Electric Power Systems Press.
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页码：228 / 233
页数：5
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