基于并联电阻扰动信号的配电网故障定位方法分析

QI Zheng

您当前的位置：

首页 >

文章列表页 >

基于并联电阻扰动信号的配电网故障定位方法分析

更新时间：2025-08-13

- 基于并联电阻扰动信号的配电网故障定位方法分析
- Automation of Electric Power Systems Vol. 42, Issue 9, Pages: 195-200(2018)
- 作者机构：
  
  华北电力大学电气与电子工程学院,北京市,102206
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2018
- 稿件说明：
移动端阅览
QI Zheng. [J]. Automation of electric power systems, 2018, 42(9): 195-200.
DOI：

QI Zheng. [J]. Automation of electric power systems, 2018, 42(9): 195-200. DOI：

摘要

基于并联电阻扰动信号的配电网故障定位方法利用对外加扰动信号的追踪来实现定位，已在配电网故障定位中较为广泛应用。但该方法在实际应用中会出现施加扰动信号后故障特征变化规律不确定的问题，使得故障定位装置误判，导致故障定位失败。为此，文中建立了小电流接地系统等值电路，深入研究了扰动信号通过不同非故障相注入后单相接地故障电流的变化规律，分析了负荷电流以及接地过渡电阻的影响，对基于并联电阻扰动信号的配电网故障定位方法的有效性进行理论论证。提出了对中性点不接地系统或经欠补偿消弧线圈接地系统扰动信号应通过故障相的滞后相注入，对中性点经过补偿消弧线圈接地系统扰动信号应通过故障相的超前相注入的优化方法。仿真结果证明了所提优化方法的有效性。

Abstract

The distribution network fault location based on parallel resistance disturbed signal injection is realized by tracking and diagnosing the disturbed signal. It has been widely used in distribution network fault location. However

in practical application

this method has the problem of uncertainty characteristics of the current variation

which causes the fault location device to misjudge. Therefore

this paper establishes the equivalent circuit of the small current grounding system

deeply studies the variation of the fault current after the disturbed signal injected through different non-faulty phases

and analyzes the influence of the load current and the grounding transition resistance. The theory of the effective fault location technology based on parallel resistance disturbed signal is demonstrated. It is proposed that the disturbed signal should be injected through the lagging phase of the fault phase in the ungrounded neutral sysytem or undercompensated arc-supperssion-coil-ground neutral system. The disturbed signal should be injected through the ahead phase of the fault phase in the overcompensated arc-suppression-coil-ground neutral system. The simulation results prove the correctness of the optimization method.

关键词

Keywords

references

Views

2616

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

基于配电自动化系统的单相接地故障定位

Detection and Location Method of Single-phase-to-ground Fault in Distribution Network Based on Zero-sequence Transient Fault Component

Frequency Characteristics Based Location of Single-phase-to-ground Fault Area on Rotor Side of Variable-speed Pumped Storage Unit

Fast Fault Back-tracing Method for Large-scale Complex Distribution Networks Based on Dynamic Graph Projection

Related Author

LIU Daobing

GU Xueping

LI Lin

GAO Houlei

YUAN Tong

PENG Fang

XING Kai

GUI Lin

Related Institution

North China Electric Power University

School of Electrical Engineering, Shandong University

State Key Laboratory of Power System Operation and Control(Tsinghua University)

NR Electric Co., Ltd.

State Grid Corporation of China

⁰