Fault Line Selection Method of Resonant Grounding System Based on Zero-sequence Current Disturbance Characteristics

被引：0

作者：

Wang, Qing ^{[1
]}

Sun, Yang ^{[1
]}

Li, Jiang-Peng ^{[1
]}

Yang, Long ^{[1
]}

Li, Jin-Dong ^{[1
]}

Shao, Wen-Quan ^{[2
]}

Zhang, Shuang ^{[2
]}

机构：

[1] State Grid Ningxia Electric Power Co., Ltd., Yinchuan,750001, China

[2] Electronics and Information College, Xi'an Polytechnic University, Xi'an,710048, China

来源：

Science Technology and Engineering | 2025年 / 25卷 / 20期

关键词：

Electric grounding - Electric power distribution - MATLAB - Power distribution faults;

D O I：

10.12404/j.issn.1671-1815.2404757

中图分类号：

学科分类号：

摘要：

In order to solve the fault line selection problem of single-phase high resistance grounding in resonant grounded distribution systems, a fault line selection scheme was proposed that utilized the disturbance characteristics of zero-sequence current before and after the neutral point parallel resistor was grounded. The zero-sequence fault model was established for the two conditions before and after the resistor paralleling with the arc suppression coil, and the zero-sequence current variation characteristics of sound and faulty lines were analyzed correspondingly. The amplitude of the zero-sequence current of any healthy line decreased after the neutral resistance was applied, while the current of the faulty line increased. Furthermore, a fault line selection criteria was constructed, which was used the amplitude disturbance characteristics of the zero-sequence currents. Simulations based on MATLAB verified the correctness and effectiveness of the proposed method. The results show that the proposed scheme is able to reliably detect single-phase ground fault with the resistance up to 5 kΩ. © 2025 Beijing Kexue Jishu yu Gongcheng Zazhishe. All rights reserved.

引用

页码：8536 / 8542