Auxiliary Judgment Method of Single Phase Grounding Fault in Distribution Network Based on Distribution Automation System

LUO Xuelian; CHEN Chenggong; LIU Zhihao; ZENG Huanyue

doi:10.3969/j.issn.1008-0198.2022.05.015

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Auxiliary Judgment Method of Single Phase Grounding Fault in Distribution Network Based on Distribution Automation System

更新时间：2025-06-11

- Auxiliary Judgment Method of Single Phase Grounding Fault in Distribution Network Based on Distribution Automation System
- Vol. 42, Issue 5, Pages: 85-89(2022)
- 作者机构：
  
  国网湖南省电力有限公司株洲供电分公司,湖南,株洲,412000
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1008-0198.2022.05.015
  CLC： TM773
- Published：2022
- 稿件说明：
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罗雪莲, 陈成功, 刘志豪, 曾欢悦. 基于配电自动化系统的配网单相接地故障辅助研判方法[J]. 湖南电力, 2022, 42(5): 85-89.

LUO Xuelian, CHEN Chenggong, LIU Zhihao, et al. Auxiliary Judgment Method of Single Phase Grounding Fault in Distribution Network Based on Distribution Automation System[J]. 2022, 42(5): 85-89.
罗雪莲, 陈成功, 刘志豪, 曾欢悦. 基于配电自动化系统的配网单相接地故障辅助研判方法[J]. 湖南电力, 2022, 42(5): 85-89. DOI： 10.3969/j.issn.1008-0198.2022.05.015.

LUO Xuelian, CHEN Chenggong, LIU Zhihao, et al. Auxiliary Judgment Method of Single Phase Grounding Fault in Distribution Network Based on Distribution Automation System[J]. 2022, 42(5): 85-89. DOI： 10.3969/j.issn.1008-0198.2022.05.015.

摘要

针对配网接地选线装置造价高、选线效率低、选线成功率不高等问题

基于配电自动化主站系统稳态零序量

开发了一种基于零序阻抗比较和历史数据参考的接地故障辅助研判模块。首先

对单相接地故障下10 kV电压等级配电网的电气特征进行详细分析

根据零序阻抗比较的原理得出一种接地选线方法。其次

通过统计历史接地数据

计算配网线路发生接地故障的概率

利用熵权法对历史故障量、重要程度标志量和零序电流等研判依据进行赋权

形成一种依托配电自动化系统的配网单相接地故障辅助研判模块。最后

案例分析表明该模块具有较高的选线准确率。

Abstract

Aiming at the problems of high cost

low line selection efficiency and low success rate of grounding line selection device in distribution network

based on the steady state zero sequence quantity of distribution automation master station system

a grounding fault auxiliary judgment module based on zero sequence impedance comparison and historical data reference is developed. Firstly

the electrical characteristics of 10 kV distribution network under single phase grounding fault are analyzed in detail

and a grounding line selection method is obtained according to the principle of zero sequence impedance comparison. Secondly

through the statistics of historical grounding data

the probability of grounding fault in distribution network lines is calculated

and the historical fault quantity

important degree mark quantity and zero sequence current are weighted by entropy method

so as to form an auxiliary judgment module of single phase grounding fault in distribution network relying on distribution automation system. Finally

the case analysis shows that this module has high accuracy in line selection.

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references

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