【作者】 王朋； 李名加； 马宁； 康强； 李黎； 葛亚峰； 刘云龙；

【Author】 WANG Peng;LI Ming-jia;MA Ning;KANG Qiang;LI Li;GE Ya-feng;LIU Yun-long;Key Laboratory of High Power Microwave Technology, Institute of Applied Electronics,CAEP;State Key Laboratory of Advanced Electromagnetic Engineeirng and Technology, Huazhong University of Science & Technology;

【机构】 中国工程物理研究院应用电子学研究所高功率微波技术重点实验室； 强电磁工程与新技术国家重点实验室(华中科技大学)；

【摘要】 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。更多还原

【Abstract】 In order to reveal the developing progress of flashover in Dodecylbenzene and study the effective methods to improve the creepage distance of pulsed power devices. Flashover voltage of Plexiglass and nylon6 were measured under negative pulse voltage through experiments with different pulse risetime and different electric form. By the result of experiment, it is found that the flashover voltage increase as impulse steepness increases. With the flashover distance increasing, the flashover voltage increases, but flashover field strength decreases. The more nonuniform electric field is, the more prone to flashover occurs, and when 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. The experiment results can also provide methods for insulation design of pulsed power devices.更多还原