Experiment on AC Breakdown Characteristics of CF4/CO2 Gas Mixture

doi:10.11930/j.issn.1004-9649.201808153

Abstract

Abstract: SF₆ is a widely used as gas insulating medium in electrical equipment at present, but its greenhouse effect has a great impact on the environment. Therefore, it is of great significance to study the environmental friendly gas insulating medium which can replace SF₆. CF₄ is a strong electronegative gas with low global warming potential (GWP) index and liquefaction temperature. In this paper, the power frequency breakdown characteristics of CF₄/CO₂ mixture were studied by power frequency breakdown test, and its synergistic effect, GWP value are also analyzed. The results show that the insulation strength of CF₄/CO₂ mixture with 50% CF₄ mixing ratio can reach about 90% of pure CF₄, and the GWP value is low, so it has potential for gas insulation. The synergistic effect of CF₄/CO₂ mixture is between 0.12 and 0.38, showing obvious synergistic effect.

Key words: CF₄/CO₂, AC breakdown, insulation strength, synergistic effect, GWP

CLC Number:

TM213

WANG Xingwei, PENG Yanqing, YUAN Chuanzhen, FU Feifeng, ZHANG Damin. Experiment on AC Breakdown Characteristics of CF₄/CO₂ Gas Mixture[J]. Electric Power, 2019, 52(4): 74-79.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201808153

https://www.electricpower.com.cn/EN/Y2019/V52/I4/74

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Experiment on AC Breakdown Characteristics of CF₄/CO₂ Gas Mixture

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