Fault Analysis and Improvement Measures of GIL Three-pillar Insulator in UHVDC Transmission Project

WANG Jingfei; ZHANG Qiang; LI Xiangbin; HUANG Dabin; ZHANG Renchi

doi:10.13296/j.1001-1609.hva.2020.01.037

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Fault Analysis and Improvement Measures of GIL Three-pillar Insulator in UHVDC Transmission Project

更新时间：2025-04-26

- Fault Analysis and Improvement Measures of GIL Three-pillar Insulator in UHVDC Transmission Project
- High VoltageApparatus Vol. 56, Issue 1, Pages: 246-252(2020)
- 作者机构：
  
  中国南方电网超高压输电公司昆明局
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.01.037
  CLC： TM216;TM721.1
- Published：2020
- 稿件说明：
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[1]王井飞,张强,李祥斌,黄大彬,张任驰.特高压直流输电工程GIL三支柱绝缘子故障分析及改进措施[J].高压电器,2020,56(01):246-252.

WANG Jingfei, ZHANG Qiang, LI Xiangbin, et al. Fault Analysis and Improvement Measures of GIL Three-pillar Insulator in UHVDC Transmission Project[J]. High voltageapparatus, 2020, 56(1): 246-252.
[1]王井飞,张强,李祥斌,黄大彬,张任驰.特高压直流输电工程GIL三支柱绝缘子故障分析及改进措施[J].高压电器,2020,56(01):246-252. DOI： 10.13296/j.1001-1609.hva.2020.01.037.

WANG Jingfei, ZHANG Qiang, LI Xiangbin, et al. Fault Analysis and Improvement Measures of GIL Three-pillar Insulator in UHVDC Transmission Project[J]. High voltageapparatus, 2020, 56(1): 246-252. DOI： 10.13296/j.1001-1609.hva.2020.01.037.

摘要

随着特高压直流输电工程建设日益深入

气体绝缘金属封闭输电线路（GIL）以占地面积小、环境兼容性好、输送容量大、能承载高电压及大电流等优点被广泛应用于特高压直流输电系统

其运行稳定性研究被提上日程。为了分析GIL运行过程中三支柱绝缘子故障原因

研究三支柱绝缘子运行特性

通过GIL超声波局部放电分析、解体检查、固定三支柱绝缘子受力分析及固定三支柱绝缘子生产工艺分析

明确GIL三支柱绝缘子内部制造缺陷为故障原因。分析认为

通过对GIL固定三支柱装配优化、绝缘支柱生产过程优化及固定三支柱连板优化等措施

改进后三支柱绝缘子应用于生产现场可有效降低GIL设备故障率

提高GIL运行稳定性

对特高压直流输电工程的可靠运行有着重要意义。

Abstract

With the increasingly in-depth construction of UHVDC transmission project

Gas Insulated TransmissionLine（GIL）has been widely used in UHVDC transmission system due to its advantages such as small area

good en-vironmental compatibility

large transmission capacity

high voltage and large current

etc

and the study on its op-erational stability has been put on the schedule. In order to analyze the reasons for the fault of the three-pillar insula-tor during the operation of GIL and study the operation characteristics of the three-pillar insulator

the internal manu-facturing defect of the three-pillar insulator was identified as the cause of the fault through the analysis of partial dis-charge of GIL ultrasonic wave

disintegration inspection

force analysis of the fixed three-pillar insulator and produc-tion process analysis of the fixed three-pillar insulator. The analysis shows that through the measures of GIL fixedthree-pillar assembly optimization

insulation pillar production process optimization and fixed-three-pillar plate opti-mization

the improved three-pillar insulator applied to the production site can effectively reduce the equipment fail-ure rate of GIL

improve the operation stability of GIL

which is of great significance to the reliable operation of UH-VDC transmission project.

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