CF4/CO2混合气体工频击穿特性的试验研究

SF₆是目前电气设备中广泛使用的气体绝缘介质，但其产生的温室效应对环境影响极大，因此，研究能替代SF₆的环保型气体绝缘介质具有重要的意义。CF₄是一种具有低温室效应指数（global warming potential， GWP）和低液化温度的强电负性气体。通过工频击穿试验，研究了CF₄/CO₂混合气体的工频击穿特性，并对其协同效应和GWP值进行分析。结果表明：CF₄混合比为50%的CF₄/CO₂混合气体的绝缘强度能达到纯CF₄的90%左右，同时GWP值低，具有用于气体绝缘的潜力；CF₄/CO₂混合气体的协同效应值在0.12~0.38，表现出明显的协同效应。

Experiment on AC Breakdown Characteristics of CF4/CO2 Gas Mixture

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.