电器与能效管理技术 ›› 2022, Vol. 0 ›› Issue (11): 54-58.doi: 10.16628/j.cnki.2095-8188.2022.11.009

• 系统检测与保护 • 上一篇    下一篇

基于相电流稳态突变量的单相接地故障定位研究

周万鹏, 郭彦宏, 罗嘉良, 张利敏, 李彪, 肖少华   

  1. 国网嘉兴供电公司, 浙江 嘉兴 314000
  • 收稿日期:2022-07-08 出版日期:2022-11-30 发布日期:2023-01-04
  • 作者简介:周万鹏(1988—),男,工程师,主要从事配网调度、配电自动化研究。|郭彦宏(1986—),男,工程师,主要从事电网调控技术研究。|罗嘉良(1994—),男,工程师,主要从事配电自动化与智能调度研究。

Research of Single-Phase Grounding Fault Location Based on Steady-State Abrupt Change of Phase Current

ZHOU Wanpeng, GUO Yanhong, LUO Jialiang, ZHANG Limin, LI Biao, XIAO Shaohua   

  1. State Grid Jiaxing Electric Power Company, Jiaxing 314000, China
  • Received:2022-07-08 Online:2022-11-30 Published:2023-01-04

摘要:

大部分配电网单相接地故障定位是通过检测、计算零序电流来实现,需要增加相应硬件设备,在已经实现配电自动化改造区域改造困难,提出一种基于三相相电流稳态突变量分析的小电流单相接地故障定位方法。依据接地故障发生前后三相电流的绝对突变量,设置判据实现故障区段定位,MATLAB仿真结果及工程应用验证所提方法的可行性。所提方法可以在主站侧远方定位,计算简单,降低了配电网接地故障定位的复杂度。

关键词: 配电网, 稳态电流, 单相接地, 区段定位, 配电自动化

Abstract:

Most of the single-phase grounding fault location of the distribution network is realized by detecting and calculating the zero-sequence current,and the corresponding hardware equipment needs to be added.It is difficult to reconstruct in the area where the distribution automation has been realized.A small current single-phase grounding fault location method based on the analysis of three-phase phase current steady-state abrupt change is proposed.According to the absolute abrupt change of the three-phase current before and after the occurrence of the ground fault,the criterion is set to realize the location of the fault section.The MATLAB simulation results and engineering applications verify the feasibility of the method.The proposed method can be located at the remote side of the main station,which is simple in calculation and reduces the complexity of the grounding location of the distribution network.

Key words: distribution network, steady-state current, single-phase grounding, segment location, distribution automation

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