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CF3I-CO2混合气体在针板电极下局部放电绝缘特性实验研究

, PP. 36-42

Keywords: CFI-CO,局部放电起始电压,温室效应,混合比,协同效应

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Abstract:

由于SF6气体严重的温室效应影响,减少或杜绝SF6气体的使用已经达成共识,有关SF6替代气体的研究围绕一种电负性气体和缓冲气体的混合气体展开。本文在针板电极下通过工频实验同时测量了CF3I-CO2的局部放电起始电压和击穿电压,讨论了混合比、压强对混合气体局部放电性能的影响,并与SF6-CO2混合气体的局部放电起始电压进行比较。实验结果表明一个大气压下,纯CF3I的击穿电压是SF6的1.2倍;CF3I-CO2的局部放电起始电压是SF6-CO2的0.9~1.1倍,同时,CF3I气体与CO2气体具有很好的协同效应,协同效应值为0.53;CF3I-CO2(30%-70%)混合气体的局部放电能力是纯SF6的0.74倍。因此,从局部放电性能的角度来看,CF3I-CO2(30%-70%)混合气体有可能替代SF6气体用在气体绝缘设备中。

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