Analysis of Relay Protection for Distribution Networks in Small Resistance Grounded Substations

Nian TONG; Zhikun WU; Wei XIAO; Shentong MA; Run SHEN

doi:10.13882/j.cnki.ncdqh.2407A056

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Analysis of Relay Protection for Distribution Networks in Small Resistance Grounded Substations

Operation & Maintenance | 更新时间：2025-11-14

- Analysis of Relay Protection for Distribution Networks in Small Resistance Grounded Substations
- Rural Electrification Issue 5, Pages: 61-64(2025)
- 作者机构：
  
  国网江苏省电力有限公司徐州供电分公司，江苏徐州 221000
- 作者简介：
- 基金信息：
- DOI：10.13882/j.cnki.ncdqh.2407A056
  CLC： TM771;32400.14.ncdqh.2407A056
- Received：17 July 2024，
  
  Revised：2025-02-12，
  
  Published：10 May 2025
- 稿件说明：
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Nian TONG, Zhikun WU, Wei XIAO, et al. Analysis of Relay Protection for Distribution Networks in Small Resistance Grounded Substations[J]. Rural Electrification, 2025, (5): 61-64.
DOI：

Nian TONG, Zhikun WU, Wei XIAO, et al. Analysis of Relay Protection for Distribution Networks in Small Resistance Grounded Substations[J]. Rural Electrification, 2025, (5): 61-64. DOI： 10.13882/j.cnki.ncdqh.2407A056.

摘要

文章简要介绍了小电阻接地系统的特点，选取徐州地区2座经小电阻接地改造后的110 kV变电站作为案例，对这2座变电站内10 kV配电网部分继电保护的保护范围和动作逻辑进行了对比分析，值班员可根据保护动作信息反向推导出故障点位置，为变电站内10 kV配电网故障的快速查找提供了参考。

Abstract

This study briefly introduces the characteristics of small resistance grounded systems. Two retrofitted 110 kV substations in Xuzhou are selected as case studies. The protection range and tripping logic for their 10 kV distribution network relays are compared. The substation operation and maintenance operators can back-trace fault locations based on protection tripping signals. The results provide practical guidance for rapid fault location in substation of 10 kV distribution networks.

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刘仪华,邱爽,薛思祥,等.10 kV中性点接地方式由消弧线圈变为小电阻的改造方法及常见问题探讨[J].农村电气化,2024(2):26-29.

李晨.中性点经小电阻接地系统单相接地故障选线与定位技术研究[D].华北水利水电大学,2022.

侯泽权.中性点经小电阻接地系统单相接地故障保护方法研究[D].西安理工大学,2023.

廖颖欢.小电阻接地系统故障保护方法的研究[D].华南理工大学,2020.

朱青松.小电阻接地系统单相接地故障处理能力提高方法研究[D].西安理工大学,2023.

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