SF<sub>6</sub>/N<sub>2</sub>混合气体在126kV气体绝缘金属封闭开关设备中的应用

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Abstract Most gas insulated switchgear (GIS) in service use SF₆ with better insulation properties as the insulating medium. For the achievement of carbon peaking and carbon neutrality goals, research on the replacement of insulating gas to control the use and emission of SF₆ gas is helpful to improve the environmental friendliness of power equipment. In order to realize the application of SF₆/N₂ mixtures in 126kV GIS, the basic parameters of 126kV SF₆/N₂ mixture GIS are first determined, while the feasibility of the design is verified by establishing the finite element model of each unit. The type test shows that on the premise of maintaining the existing GIS structure, a mixture of SF₆/N₂ with appropriate mixing ratio and inflation pressure can ensure the normal operation of GIS.

Key words： SF₆ alternative SF₆/N₂ mixture insulation performance temperature rise performance mechanical performance finite element simulation

Received: 27 June 2023

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	DAI Zhen
	WANG Tongde
	ZHU Zhenhua

Cite this article:

DAI Zhen,WANG Tongde,ZHU Zhenhua. Application of SF₆/N₂ mixture in 126kV gas insulated switchgear[J]. Electrical Engineering, 2023, 24(9): 60-64.

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http://dqjs.cesmedia.cn/EN/Y2023/V24/I9/60

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