Permanent single-phase grounding fault location in flexible grounding distribution network based on negative-sequence voltage variation

被引：0
|
作者：
Yin L. [1 ]
Kong L. [2 ]
Wang G. [2 ]
Wang H. [1 ]
Liang R. [2 ]
Peng N. [2 ]
机构：
[1] Lianyungang Power Supply Branch, State Grid Jiangsu Electric Power Co.，Ltd., Lianyungang
[2] School of Electrical Engineering, China University of Mining and Technology, Xuzhou
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 01期
基金：
中国国家自然科学基金;
关键词：
electric fault location; fault probability; flexible grounding distribution network; modified projection proportion coefficient; negative-sequence voltage variation;
D O I：
10.16081/j.epae.202204070
中图分类号：
学科分类号：
摘要：
Aiming at the flexible grounding distribution network，a permanent single-phase grounding fault location method in flexible grounding distribution network based on negative-sequence voltage variation is proposed. Firstly，the fault area is determined based on the change of negative-sequence voltage before and after the parallel small resistance is set. Secondly，the fault branch is determined according to the modified projection proportion coefficient of zero-sequence current to determine the fault section. Then，the fault probability is calculated by using the deviation between the measured value and the calculated value of negative-sequence voltage change，and the fault probability of each virtual node in the fault section is compared for accurate fault location. At the same time，an optimal layout scheme of measuring points suitable for the location method of this section is proposed. Finally，PSCAD is used to build a simulation model，and the simulation data analysis verifies the effectiveness and reliability of the proposed permanent single-phase grounding fault location method. © 2023 Electric Power Automation Equipment Press. All rights reserved.
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页码：83 / 89and99
页数：8916
相关论文
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