252kV环保型GIS开关在干燥空气介质下的热特性分析
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关键词：GIS开关； SF6 气体；三工位开关；稳态热分析；多物理场耦合中图分类号：TM564文献标志码：ADOI：10.7652/xjtuxb202602016 文章编号：0253-987X（2026）02-0166-9
Thermal Characteristic Analysis of 252kV Eco-Friendly GIS Switch in Dry Air Medium
CAO Rong¹，NIU Chunpingl，HE Hailong1，WU Yi1，PENG Zhe²，RONG Mingzhel （1. School of Electrical Engineering，Xi'an Jiaotong University，Xi'an 71Oo49，China; 2.Guangdong Mingyang Electric Co.，Ltd.，Zhongshan，Guangdong 52840o，China）
Abstract： To address the issues of high global warming potential associated with the prevalent use of SF6 gas as the insulating medium in conventional gas-insulated switchgear （GIS），as well as the overheating problems and thermal stability concerns caused by compact structure and limited heat disipation area， dry air is proposed as an alternative insulating medium to replace SF6 .A thermal characteristic study was conducted on a 252kV three-position GIS switch. Steady-state thermal analysis of the three-position switch was achieved through electro-thermalfluid multiphysics coupling，and the temperature field distribution of the switch was obtained. The accuracy of the simulation model was verified by comparing the simulation results with temperature rise test data. Based on the established model， the influence of gas pressure and contact resistance on the temperature field distribution of the three-position switch was further analyzed. The temperature rise decreases most significantly when the gas pressure is increased to
0.7MPa . By comparing the temperature rise of the GIS three-position switch in dry air and SF6 under different gas pressures，it was found that when the dry air pressure is about three times that of SF6 ，the temperature rise of the switch is essentially the same. This study provides a reference for the analysis and design of eco-friendly three-position GIS switches
Keywords： GIS switch; SF6 gas； three-position switch； steady state thermal analysis; multi-physical field coupling
气体绝缘金属封闭开关（gasinsulatedswitchgear，GIS）中的三工位开关因其结构紧凑、安全可靠而备受关注。（剩余14866字）
