Faulty Line Selection Method of Distribution Network Based on Time-Frequency Traveling Wave Panoramic Waveform

被引：0
|
作者：
Deng F. [1 ]
Mei L. [1 ]
Tang X. [1 ]
Xu F. [1 ]
Zeng X. [1 ]
机构：
[1] School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 13期
基金：
美国国家航空航天局;
关键词：
Distribution network; Fault feeder selection; Principle of similarity degree; Single phase to ground fault; Traveling wave panoramic waveform;
D O I：
10.19595/j.cnki.1000-6753.tces.200649
中图分类号：
学科分类号：
摘要：
In order to improve the accuracy and reliability of single-phase grounding fault feeder selection in distribution network, a fault line selection method based on traveling wave panoramic waveform in time-frequency domain is proposed. First, the S-transform is used to extract the time-frequency traveling wave panoramic waveform of each line, which can display truly the characteristics of the fault traveling. The difference of amplitude, frequency and polarity of traveling wave between faulty line and healthy line is analyzed in detail. Then, based on the principle of waveform similarity, the traveling wave panoramic waveform of faulty line and healthy lines are analyzed quantitatively, and a similarity degree coefficient matrix is constructed for each line. By calculating the sum of the correlation coefficients of each line, the difference of the panoramic waveform is amplified, and the accurate distribution network line selection is realized. The proposed faulty line selection method does not need to set the threshold manually. A large number of simulation results show that the method has high algorithm adaptability. Under 3kΩ high-resistance ground fault, it can still achieve sensitively faulty feeder selection in distribution network. © 2021, Electrical Technology Press Co. Ltd. All right reserved.
引用
收藏
页码：2861 / 2870
页数：9
相关论文
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