Analysis of loop current and temperature rise of GIS shell of ±200kV converter station based on field-circuit coupling

MAO Xintong; WU Wei; CHEN Songtao; ZHANG Xianmeng; ZHAO Huilong; WU Leyang; LIU Fanghan; DONG Tianyu

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Analysis of loop current and temperature rise of GIS shell of ±200kV converter station based on field-circuit coupling

更新时间：2025-06-04

- Analysis of loop current and temperature rise of GIS shell of ±200kV converter station based on field-circuit coupling
- Moren Journal (2025)
- 作者机构：
  
  1.国网江苏省电力有限公司建设分公司南京 210003
  2.国网江苏省电力有限公司南京 210003
  3.西安交通大学电气工程学院西安 710049
- 作者简介：
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MAO Xintong, WU Wei, CHEN Songtao, et al. Analysis of loop current and temperature rise of GIS shell of ±200kV converter station based on field-circuit coupling[J/OL]. Moren journal, 2025.
DOI：

MAO Xintong, WU Wei, CHEN Songtao, et al. Analysis of loop current and temperature rise of GIS shell of ±200kV converter station based on field-circuit coupling[J/OL]. Moren journal, 2025. DOI：

摘要

高压气体绝缘开关设备（GIS）在运行时易产生外壳环流，这会致使设备过热并加速绝缘材料老化。环流还可能干扰测量和保护装置，从而降低系统的供电可靠性。本文针对某±200kV换流站的GIS，研究其结构，深入分析感应电压产生和环流形成的机理；提出面向GIS设备外壳环流分析的场-路耦合模型，以及GIS相间汇流排电磁-流-热多物理场耦合模型；通过分析GIS外壳的感应电压产生机理以及环流路径，研究GIS在不同运行工况、不同接触电阻条件下的外壳环流分布和汇流排温度分布规律；通过与现场试验结果的比较，验证了建立模型的精确度和可靠性。研究表明，增加汇流排和接地的数量，能有效降低外壳感应电压和环流，从而缓解设备发热。本项研究对实际工程中降低外壳环流、缓解设备发热、合理选择接地点的数量及位置具有一定指导意义，为GIS的设计和运行提供理论依据，以提高高压直流输电系统的安全稳定性。

Abstract

Gas Insulated Switchgear (GIS) is essential in high-voltage power transmission

but it can generate circulating currents that cause equipment heating. This heating can accelerate insulation aging and damage critical measurement and protection devices

posing a risk to power grid integrity. A study focused on GIS at a ±200kV converter station has provided insights into these issues. The research introduced the GIS structure and analyzed the generation of shell-induced voltage and circulating currents. It developed field-path coupling and multiphysics field coupling models to understand the principles of electromagnetic and electrostatic induction

tracing the paths of circulating currents under various operating conditions and contact resistances. The study's conclusions are significant. The models' accuracy and reliability were verified against field test results. It was found that increasing busbars and grounding points can reduce induced voltage and circulating current

thereby reducing equipment heating. This finding provides practical guidance for grounding point selection in future projects and offers a theoretical basis for GIS design and operation. It enhances the safety and stability of high-voltage direct current (HVDC) transmission systems

contributing to the advancement of power transmission technology for more reliable and efficient energy distribution..

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