Circulation Characteristics and Influencing Factors of GIL Grounding System

汤亮亮; 蔡炜; 王琼芳; 赵淳; 徐霞; 文习山

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Circulation Characteristics and Influencing Factors of GIL Grounding System

更新时间：2025-12-08

- Circulation Characteristics and Influencing Factors of GIL Grounding System
- Vol. 46, Issue 6, Pages: 2098-2105(2020)
- 作者机构：
  
  1. 南瑞集团有限公司(国网电力科学研究院有限公司)
  2. 国网电力科学研究院武汉南瑞有限责任公司
  3. 武汉大学电气与自动化学院
  4. 中国电力工程顾问集团中南电力设计院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 June 2020，
  
  Published：2020
- 稿件说明：
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汤亮亮, 蔡炜, 王琼芳, et al. Circulation Characteristics and Influencing Factors of GIL Grounding System[J]. 2020, 46(6): 2098-2105.
DOI：

汤亮亮, 蔡炜, 王琼芳, et al. Circulation Characteristics and Influencing Factors of GIL Grounding System[J]. 2020, 46(6): 2098-2105. DOI：

摘要

为了掌握气体绝缘金属封闭输电线路（gasinsulatedtransmission line

GIL）管廊接地系统的环流特性以及环流特性的影响因素

对GIL管廊系统进行了理论性仿真研究。建立500k VGIL接地系统和壳体环流模型

分析了环流系统的自阻抗、相间互感等参数

计算得到GIL三相导线外壳的环流值约为导线电流的75%;对比ATP-EMTP程序的解耦模型和MATLAB程序计算的不解耦模型计算结果

验证了计算结果的可靠性。对GIL管廊沿线外壳电位规律进行分析研究

外壳电位呈现出中间低、端部高的U字形分布

人在管廊内部的接触电压符合规程要求。最后

分析相间短接排对环流特性和外壳电位的影响

发现短接排的增加会使端部的入地电流减小

同时也会使外壳感应电压降低

理论研究建议每隔80 m在铝合金外壳上加装短接排。

Abstract

In order to grasp the circular current characteristics of gas insulated transmission line（GIL） pipe corridor grounding system and the influencing factors of circulation characteristics

theoretical simulation research was carried out for GIL pipe corridor grounding system. The 500 kV GIL grounding system and the shell circular current model were established

and the parameters of self-impedance and phase-phase mutual inductance were analyzed. The results show that the shell circular current value of GIL is about 75% of conductor current. The reliability of calculation results was verified by comparing the decoupling model calculation of ATP-EMTP program with the decoupling model calculation of MATLAB program. And then

the shell potential distribution rule along the GIL corridor was studied. The calculation results show that the shell potential present a U-type distribution

the maximum touch potential difference inside the GIL pipe corridor meet the requirements of the regulations. At last

short circuit connection bar was studied

which shows that the bars can reduce the ground current at the end of the shell significantly. As the number of short circuit connection bar increases

the grounding current at the end of the shell and the shell potential will decrease gradually. The short circuit connection bar can be installed on the aluminum alloy shell at every 80 m.

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