Discussion of the Grounding Method of Gas Insulated Transmission Line

WANG Yanan; DING Weidong; GOU Yang; XIA Jian; YAN Jiaqi; WANG Jiachen; LI Zhibing

doi:10.13296/j.1001-1609.hva.2016.04.015

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Discussion of the Grounding Method of Gas Insulated Transmission Line

更新时间：2025-04-26

- Discussion of the Grounding Method of Gas Insulated Transmission Line
- High VoltageApparatus Vol. 52, Issue 4, Pages: 98-102(2016)
- 作者机构：
  
  1. 西安交通大学电力设备电气绝缘国家重点实验室
  2. 中国电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2016.04.015
  CLC： TM75;TM862
- Published：2016
- 稿件说明：
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[1]王亚楠,丁卫东,苟杨,夏健,闫家启,王嘉琛,李志兵.气体绝缘金属封闭输电线路(GIL)接地问题探讨[J].高压电器,2016,52(04):98-102.

WANG Yanan, DING Weidong, GOU Yang, et al. Discussion of the Grounding Method of Gas Insulated Transmission Line[J]. High voltageapparatus, 2016, 52(4): 98-102.
[1]王亚楠,丁卫东,苟杨,夏健,闫家启,王嘉琛,李志兵.气体绝缘金属封闭输电线路(GIL)接地问题探讨[J].高压电器,2016,52(04):98-102. DOI： 10.13296/j.1001-1609.hva.2016.04.015.

WANG Yanan, DING Weidong, GOU Yang, et al. Discussion of the Grounding Method of Gas Insulated Transmission Line[J]. High voltageapparatus, 2016, 52(4): 98-102. DOI： 10.13296/j.1001-1609.hva.2016.04.015.

摘要

气体绝缘金属封闭输电线路（GIL）凭借着自身优势

在近年来得到很大发展。为了保证GIL使用安全

需要对其外壳接地进行合理的设计和布置。笔者介绍了GIL两种接地方式及各自特点

利用MATLAB Simulink建立三相分体式GIL等值计算模型

结合某800 kV/4 000 A GIL产品参数进行仿真计算

研究了GIL外壳电位分布特征

探究了导流排布置数量、接地点间距对外壳电位及接地点入地电流的影响。计算结果表明

GIL外壳电位呈现出端部高中间低的"V"字形分布;在GIL端部设置导流排对降低外壳电位、减小入地电流有重要作用;增加接地点数目

减小接地点间距可以降低外壳电位

减小接地点入地电流

但随着接地点数量的增加

其作用趋于饱和。因此

在实际工程中需保证在GIL端部设置导流排

结合仿真模型计算确定其他位置的导流排及接地点设置方式。

Abstract

Gas insulated transmission line（GIL）has got a great development in recent years due to its advantages.In order to guarantee the safety of GIL

its enclosure grounding needs to be designed and arranged reasonably. In this paper

two grounding methods and their characteristic are introduced. An isolated phase GIL equivalent calculating model based on MATLAB Simulink is established and with the parameters of an 800 kV/4 000 A GIL the simulation was conducted. The steady enclosure potential distribution is calculated and the influence of binding bar number and position and grounding distance on enclosure potential and grounding current are studied. The results show that the enclosure potential has a "V"type distribution; binding bar added at the end of the GIL has positively important influence on reducing enclosure potential and grounding current; decreasing grounding distance will reduce the potential and grounding current

but has a trend to be saturation by increasing the number of grounding point. In result

the binding bar must be arranged at the end of GIL and the grounding points and the other binding bars should be arranged according to the calculation based on the simulation model.

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