十二烷基苯中有机玻璃和尼龙的纳秒脉冲沿面闪络特性  

Surface flashover of insulating material under nanosecond pulse in dodecylbenzene

作　　者：李名加[1] 马宁[2] 王朋[3] 李黎[2] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [2]强电磁工程与新技术国家重点实验室(华中科技大学),武汉430074 [3]中国工程物理研究院应用电子学研究所高功率微波重点实验室,四川绵阳621900

出　　处：《强激光与粒子束》2015年第4期196-200,共5页High Power Laser and Particle Beams

基　　金：高功率微波技术重点实验室基金项目(2014HPM-04)

摘　　要：为了揭示十二烷基苯中绝缘材料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,闪络距离较大时,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。In order to reveal the developing progress of flashover in dodecylbenzene and study the effective methods to improve the creepage discharge of pulsed power devices,fashover voltage of polymethyl methacrylate and nylon6 were measured under negative pulse voltage through experiments at different pulse risetime and different electric form.Form the results of the experiments,it is found that the flashover voltage increases as impulse steepness increases.With the flashover distance increasing,the flashover voltage increases,but the flashover field strength decreases.The more nonuniform the electric field is,the more the flashover occurs,and if there is a large distance,flashover voltage has a slowing trend with flashover distance increasing in a very nonuniform field,and there is a clear inflection point.It is believed that they have similar flashover mechanism in vacuum and insulation oil and the flashover is completed in a gasifying path.

关 键 词：十二烷基苯 沿面闪络 纳秒脉冲 脉冲陡度 有机玻璃 尼龙6 

分 类 号：TM855[电气工程—高电压与绝缘技术]