Thermal Characteristics Analysis of a 252 kV Environmentally Friendly GIS Switch Insulated with Dry Air

CAO Rong; NIU Chunping; HE Hailong; WU Yi; PENG Zhe; RONG Mingzhe

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Thermal Characteristics Analysis of a 252 kV Environmentally Friendly GIS Switch Insulated with Dry Air

更新时间：2025-12-11

- Thermal Characteristics Analysis of a 252 kV Environmentally Friendly GIS Switch Insulated with Dry Air
- Moren Journal (2025)
- 作者机构：
  
  1.西安交通大学电气工程学院,陕西省西安市710049
  2.广东明阳电气股份有限公司,广东省中山市528400
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM564
- Received：07 May 2025，
  
  Revised：2025-07-17，
  
  Accepted：25 July 2025，
- 稿件说明：
移动端阅览
CAO Rong, NIU Chunping, HE Hailong, et al. Thermal Characteristics Analysis of a 252 kV Environmentally Friendly GIS Switch Insulated with Dry Air[J/OL]. Moren Journal, 2025.
DOI：

CAO Rong, NIU Chunping, HE Hailong, et al. Thermal Characteristics Analysis of a 252 kV Environmentally Friendly GIS Switch Insulated with Dry Air[J/OL]. Moren Journal, 2025. DOI：

摘要

针对传统GIS开关普遍采用SF

气体作为绝缘介质不仅存在极高的全球变暖潜能值，同时由于其结构紧凑、散热面积小易引发过热影响其热稳定性的问题，提出以干燥空气替代SF

气体作为绝缘介质，以252kV GIS三工位开关为研究对象开展热特性研究。通过电-热-流体多物理场耦合实现GIS三工位开关的稳态热分析，获得三工位开关的温度场分布，并通过仿真与温升测试结果的对比，验证了仿真模型的准确性。基于建立的该模型，进一步分析了充气压力和接触电阻对三工位开关温度场分布的影响规律，其在气压提升至0.7 MPa时温升降低得最为明显。并通过分析不同气压下干燥空气和SF

介质中GIS三工位开关温升的对比得到：当干燥空气的压力约为SF

气体压力的3倍时，开关的温升基本相同。该研究可为环保型GIS三工位开关的分析和设计提供参考。

Abstract

Conventional GIS switches typically use SF

gas as the insulating medium. However

has an extremely high global warming potential and

due to the compact structure and limited heat dissipation of the equipment

it often leads to overheating problems that affect thermal stability. To mitigate these issues

dry air is proposed as an environmentally friendly alternative insulating medium. The thermal characteristics are investigated using a 252kV GIS switch with a three-position mechanism as the study object. By coupling the electric

thermal

and fluid fields

a steady-state multiphysics simulation was performed to obtain the temperature distribution of the switch. The accuracy of the simulation model was validated through comparison with experimental temperature rise tests. Based on the validated model

the influence of gas pressure and contact resistance on the temperature field distribution was further investigated. The results indicate that the temperature rise is significantly reduced when the dry air pressure is increased to 0.7MPa. A comparative analysis under varying gas pressures between dry air and SF

further reveals tha

t when the dry air pressure reaches approximately three times that of SF

the thermal performance of the switch becomes nearly equivalent. These findings provide theoretical support and design references for environmentally friendly GIS three-position switches employing dry air insulation.

关键词

Keywords

references

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