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为了揭示十二烷基苯中沿面闪络的发展过程,并研究有效提高脉冲功率装置绝缘爬电距离的方法,通过实验对不同脉冲前沿、不同电场形式下有机玻璃和尼龙6在负脉冲电压下的沿面闪络电压进行了测量,结果发现,随着脉冲陡度的增加,沿面闪络电压增大。随着沿面距离的增大,闪络电压升高,但闪络场强降低。电场越不均匀,越容易发生闪络,并且在极不均匀场中,较大距离时,闪络电压随沿面距离的增长趋势变缓,出现了明显的拐点。研究认为,液体介质中的沿面闪络与真空中的沿面闪络具有相似的闪络机制,沿面闪络是在气化的通道内完成的,实验的结果可以为脉冲功率装置的绝缘设计提供参考。
In order to reveal the development process of creeping flashover in dodecylbenzene and to study the method to effectively improve the insulation creepage distance of pulsed power devices, experiments were conducted on the impulse front and plexiglass front under different electric fields and nylon 6 under negative pulse voltage Along the surface flashover voltage was measured and found that, as the pulse steepness increases, along the surface flashover voltage increases. As the creeping distance increases, the flashover voltage increases, but the flashover field intensity decreases. The more uneven the electric field, the more prone to flashover, and in a very uneven field, the greater the distance, the flashover voltage increases with the creeping distance tends to slow down, there was a significant inflection point. The study shows that flashover in liquid medium has a flashover mechanism similar to creeping flashover in vacuum. The flashover along the surface is accomplished in gasified channels. The experimental results may provide a reference for the insulation design of pulsed power devices .