Insulation Performance of CF3I-N2 Gas Mixtures as Alternative for SF6 in GIS/C-GIS

查看全文 作　　者：DENG [1]Yunkun;XIAO [1]Dengming;CHEN [2]Jiong

机构地区：[1]Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;[2]School of Electric Power and Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China

出　　处：《高电压技术》索引2013年第39卷第9期,共6页

基　　金：Project supported by National Natural Science Foundation of China (51177101) 摘　　要：CF3I has been widely considered as a potential alternative for SF6,because it has low global warming potential(GWP)but an insulation capability that is 1.2 times greater than that of SF6.In this paper,the electron swarm parameters of CF3I and its gas mixture with N2,including the effective ionization coefficient and electron drift velocity,are examined theoretically through the Boltzmann equation method in the condition of steady-state Townsend(SST)experiments.Based on the derived data of the limiting field strength of CF3I-N2gas mixture,taking into consideration of environmental aspects such as GWP,ozone depletion potential(ODP),liquefaction temperature and toxicity,we studied the possibility of applying the gas mixture as the insulation medium in gas-insulated switchgears(GIS)or cubic type gas-insulated switchgears(C-GIS).It is found that CF3I-N2gas mixtures contained 30%~70%CF3I perform comprehensively better than pure SF6and compressed N2,and especially in medium and low voltage environments,the boiling point of CF3I-N2gas mixture meets the domestic and global requirements in mid-low latitude regions.Therefore we conclude that the gas mixture is acceptable for replacing SF6as the insulation medium in C-GISs. 关键词：SF6气体 C-GIS 混合气体绝缘性能气体绝缘开关装置气体混合物玻尔兹曼方程地理信息系统

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Insulation Performance of CF3I-N2 Gas Mixtures as Alternative for SF6 in GIS/C-GIS

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