Distribution Characteristics of Spatial Magnetic Field in UHV GIL Gallery in Short-circuit Fault Condition

ZHAO Jun; CHEN Weijiang; BIAN Kai; NI Yuan; TENG Zihan; ZHAO Yushun

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Distribution Characteristics of Spatial Magnetic Field in UHV GIL Gallery in Short-circuit Fault Condition

更新时间：2025-12-08

- Distribution Characteristics of Spatial Magnetic Field in UHV GIL Gallery in Short-circuit Fault Condition
- Vol. 47, Issue 5, Pages: 1866-1871(2021)
- 作者机构：
  
  1. 电网环境保护国家重点实验室(中国电力科学研究院有限公司)
  2. 国家电网有限公司
  3. 合肥工业大学电气与自动化工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 May 2021，
  
  Published：2021
- 稿件说明：
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ZHAO Jun, CHEN Weijiang, BIAN Kai, et al. Distribution Characteristics of Spatial Magnetic Field in UHV GIL Gallery in Short-circuit Fault Condition[J]. 2021, 47(5): 1866-1871.
DOI：

ZHAO Jun, CHEN Weijiang, BIAN Kai, et al. Distribution Characteristics of Spatial Magnetic Field in UHV GIL Gallery in Short-circuit Fault Condition[J]. 2021, 47(5): 1866-1871. DOI：

摘要

特高压GIL短路故障条件下在管廊空间产生较大磁场

威胁管廊内监测和通讯设备的正常工作。为此

基于GIL短路电流传导和磁场耦合过程分析

建立了苏通特高压GIL综合管廊的空间磁场仿真模型

计算得到管廊端口区磁场最大（可达10mT）

并朝管廊内部迅速衰减消失

进而将GIL管廊磁场划分为端口区、衰减区和近似零场区。根据计算结果

管廊端口区GIL支撑钢构和管壳导体表面的磁场超过了GB/T 17626.8的规定1～3 s短时工频磁场抗扰度试验值

因此建议监测、通讯等弱电设备布置应远离管廊端口区

特别是靠近管壳的位置。

Abstract

A large magnetic field is generated in the UHV GIL gallery under short-circuit fault conditions

threatening the normal operation of the monitoring and communication equipment in the gallery. Based on the analysis of GIL short-circuit current conduction and magnetic field coupling process

a spatial magnetic field simulation model of Su-Tong UHV GIL integrated gallery is established in this paper. The calculation results show that the magnetic field at the end of the gallery is the largest（up to 10 mT） and decays rapidly towards the inside of the gallery. Thus

GIL gallery can be divided into port area

attenuation area

and near zero field area. Based on the calculation results

the magnetic field on the surface of the GIL supporting steel structure and the shell conductor of the gallery port area exceeds the immunity test value of 1 s to 3 s short-term power frequency magnetic field specified in standard GB/T 17626.8

so it is suggested that the weak current equipment such as monitoring and communication should be arranged far away from the gallery port area

especially the adjacent location of the shell conductor.

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