Development of ± 550 kV DC GIS Basin Insulator

Shaohua Cao; Chengwei Jing; Siqiong Zhang; Zuodong Liang; Zehao Zhang; Fangwei Liang; Yong Yang; Geng Chen; Jinliang He; Chuanyang Li

doi:10.1049/hve2.70164

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Development of ± 550 kV DC GIS Basin Insulator

更新时间：2026-10-08

- Development of ± 550 kV DC GIS Basin Insulator
- Development of ± 550 kV DC GIS Basin Insulator
- 高电压（英文） 2026年11卷第4期
- 作者机构：
  
  1. Shandong Taikai High Voltage Switchgear Co. Ltd., Taian,China
  2. Tsinghua University,Beijing,China
  3. North China Electric Power University,Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.1049/hve2.70164
  中图分类号：
- 纸质出版：2026
- 稿件说明：
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Shaohua Cao, Chengwei Jing, Siqiong Zhang, 等. Development of ± 550 kV DC GIS Basin Insulator[J]. 高电压（英文）, 2026,11(4).

Shaohua Cao, Chengwei Jing, Siqiong Zhang, et al. Development of ± 550 kV DC GIS Basin Insulator[J]. High Voltage, 2026, 11(4).
Shaohua Cao, Chengwei Jing, Siqiong Zhang, 等. Development of ± 550 kV DC GIS Basin Insulator[J]. 高电压（英文）, 2026,11(4). DOI： 10.1049/hve2.70164.

Shaohua Cao, Chengwei Jing, Siqiong Zhang, et al. Development of ± 550 kV DC GIS Basin Insulator[J]. High Voltage, 2026, 11(4). DOI： 10.1049/hve2.70164.

摘要

The basin insulator is a core component of the insulation system for ± 550 kV gas-insulated switchgear (GIS). This paper

using a finite element method for multi-physics simulations of electric–thermal coupling

determines a geometry suitable for the industrial production of ± 550 kV GIS basin insulators. Results show that

as the temperature increases

the source of charge accumulation on the convex surface of the insulator shifts from conduction current on the gas side to conduction current within the insulator. Surface potential under temperature gradients presents an absolute surface potential value below 5 kV. Mechanical performance tests

as well as electrical tests—including polarity reversal

DC superimposed impulse tests and a three-month long-term DC duration test at 1.5 times the rated voltage—were conducted. The developed ± 550 kV GIS basin insulator passed all the tests.

Abstract

The basin insulator is a core component of the insulation system for ± 550 kV gas-insulated switchgear (GIS). This paper

using a finite element method for multi-physics simulations of electric–thermal coupling

determines a geometry suitable for the industrial production of ± 550 kV GIS basin insulators. Results show that

as the temperature increases

as well as electrical tests—including polarity reversal

DC superimposed impulse tests and a three-month long-term DC duration test at 1.5 times the rated voltage—were conducted. The developed ± 550 kV GIS basin insulator passed all the tests.

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