对聚四氟乙烯在液氮中的沿面闪络电压进行了测量.采用环-环电极测量了不同间距下的首次沿面闪络电压,用韦伯概率分布的方法对实验结果进行了分析,得出0.1%闪络概率的冲击沿面闪络电压与爬电距离的关系,可为超导电力装置的绝缘设计提供参考.
The impulse surface flashover voltages of polytetrafluoroethylene(PTFE) in liquid nitrogen were measured. The initial flashover voltages were measured using ring-ring electrodes under different electrode distances, and the experimental results were analyzed by Weibull distribution. The relationship between the impulse surface flashover voltage of 0.1% flashover probability and creepage distance was obtained, which can provide reference to the insulation design of superconducting electric power equipment.
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