Analysis of the SO<sub>2</sub> Exceedance in the 1000 kV GIL Gas Chamber

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Analysis of the SO₂ Exceedance in the 1000 kV GIL Gas Chamber

更新时间：2025-08-05

- Analysis of the SO₂ Exceedance in the 1000 kV GIL Gas Chamber
- Moren Journal (2025)
- 作者机构：
  
  1.国网河南省电力公司电力科学研究院,河南省郑州市,中国
  2.国网河南省电力公司,河南省郑州市,中国
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：31 December 2024，
  
  Revised：13 February 2025，
  
  Accepted：14 February 2025，
- 稿件说明：
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Analysis of the SO₂ Exceedance in the 1000 kV GIL Gas Chamber[J/OL]. Moren journal, 2025.
DOI：

Analysis of the SO₂ Exceedance in the 1000 kV GIL Gas Chamber[J/OL]. Moren journal, 2025. DOI：

摘要

GIL作为一种新型的高压输电技术，在高压输电及复杂电力传输环境中得到广泛应用，其可靠性直接关系电力系统的安全稳定运行。文中针对国内首台首套全户外1000千伏GIL设备的气室SO₂超标问题进行分析，通过对设备进行拆解检查、试验测试与仿真分析，确认事故原因为厂内装配工装观察面狭小，存在挡圈装配不到位风险，且垂直段壳体应力集中，致使挡圈脱出，触头虚接，进而导致局部放电和过热，使SF₆分解产生SO₂。最后基于故障原因分析，提出针对性的改进措施，为该型GIL的运维和故障防范提供实践经验与指导意见。

Abstract

Gas Insulated Line (GIL)

as a novel high-voltage transmission technology

has been widely applied in high-voltage transmission and complex power transmission environments. Its reliability is crucial for the safe and stable operation of power systems. This paper presents a detailed analysis of the SO₂ overlimit issue observed in the gas chamber of the domestically first outdoor 1000 kV GIL. Through disassembly

inspection

experimental testing

and simulation analysis

it was confirmed that the cause of the accident was that the narrow observation space of the assembly tooling in the manufacturing process led to the risk of improper assembly of the retaining ring. Additionally

stress concentration in the vertical section of the shell caused the retaining ring to dislodge

resulting in poor contact between the contacts. This in turn led to partial discharge and overheating

which caused the decomposition of SF₆ and the generation of SO₂. Based on the analysis of the failure mechanism

targeted improvement measures are proposed

providing valuable practical experience and guidance for the operation

maintenance

and fault prevention of this type of GIL.

关键词

Keywords

references

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Analysis of the SO2 Exceedance in the 1000 kV GIL Gas Chamber

DOI：

摘要

Abstract

关键词

Keywords

references

Analysis of the SO₂ Exceedance in the 1000 kV GIL Gas Chamber