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圆形平板电极与薄膜层叠结构的沿面闪络性能

陈志强 贾伟 谢霖燊 郭帆 王程程 何小平 吴伟 汲胜昌

陈志强, 贾伟, 谢霖燊, 等. 圆形平板电极与薄膜层叠结构的沿面闪络性能[J]. 强激光与粒子束, 2020, 32: 025017. doi: 10.11884/HPLPB202032.190311
引用本文: 陈志强, 贾伟, 谢霖燊, 等. 圆形平板电极与薄膜层叠结构的沿面闪络性能[J]. 强激光与粒子束, 2020, 32: 025017. doi: 10.11884/HPLPB202032.190311
Chen Zhiqiang, Jia Wei, Xie Linshen, et al. Flashover characteristics of laminate structure composed of round parallel-plate electrodes and polymer film dielectrics[J]. High Power Laser and Particle Beams, 2020, 32: 025017. doi: 10.11884/HPLPB202032.190311
Citation: Chen Zhiqiang, Jia Wei, Xie Linshen, et al. Flashover characteristics of laminate structure composed of round parallel-plate electrodes and polymer film dielectrics[J]. High Power Laser and Particle Beams, 2020, 32: 025017. doi: 10.11884/HPLPB202032.190311

圆形平板电极与薄膜层叠结构的沿面闪络性能

doi: 10.11884/HPLPB202032.190311
基金项目: 强脉冲辐射环境模拟与效应国家重点实验室基金项目(SKLIPR1602)
详细信息
    作者简介:

    陈志强(1987—),男,博士研究生,助理研究员,主要研究方向为电磁脉冲环境模拟生成;chenzhiqiang@nint.ac.cn

  • 中图分类号: TM85

Flashover characteristics of laminate structure composed of round parallel-plate electrodes and polymer film dielectrics

  • 摘要: 强电磁脉冲模拟装置中用于脉冲压缩的陡化电容器常采用电极与薄膜介质层叠的结构,其主要绝缘失效模式为沿面闪络。采用圆形平板电极,在SF6绝缘环境中和加载电压为前沿约30 ns的纳秒脉冲电压的条件下,实验研究了陡化电容器关键结构参数和气压对沿面闪络性能的影响。结果表明:(1)电极厚度、气隙和表面涂覆均不能明显改变层叠结构的沿面闪络电压;(2)气压可以提高层叠结构的沿面闪络性能,但是存在饱和趋势;(3)薄膜介质层数与沿面闪络电压近似线性比例关系;(4)增长薄膜介质伸出长度能显著提高沿面闪络电压。基于流注理论对上述结果进行了探讨,认为极不均匀场中,闪络起始主要由高场强区域决定,但是闪络通道的形成和发展主要由闪络路径上的背景电场决定,因此减小层叠结构三结合点处电场对闪络性能影响不大,但减小闪络通道发展路径上的背景电场,可以有效提高层叠结构的沿面闪络电压。
  • 图  1  沿面闪络试验平台和输出波形

    Figure  1.  Experimental platform and its output voltage

    图  2  实验电极布置

    Figure  2.  Experimental electrodes

    图  3  电极厚度和气隙对层叠结构电场和闪络性能影响(图(a)中虚线表示电极的边缘,横坐标表示与电极边缘的相对位置)

    Figure  3.  Influence of the electrodes thickness and the interspace on the field distribution and the flashover performance

    图  4  硅橡胶涂层对层叠结构沿面闪络性能的影响

    Figure  4.  Influence of the silicon coating on the flashover performance

    图  5  极不均匀场中空气和SF6气体绝缘性能对比

    Figure  5.  Flashover performance comparison of air and SF6 under inhomogeneous field

    图  6  不同气压下的沿面闪络性能

    Figure  6.  Flashover voltage under different pressures

    图  7  介质层数对沿面闪络性能的影响

    Figure  7.  Influence of the number of the dielectric layers

    图  8  介质伸出长度对介质表面电场分布与沿面闪络性能的影响(图(a)中箭头表示介质边缘的电场)

    Figure  8.  Influence of the stretched length of the dielectrics

    图  9  电子崩发展距离和时间的关系

    Figure  9.  Relationship between time and drift distance

    图  10  不同K值下的临界电子崩长度和对应的电压幅值

    Figure  10.  Critical length and its corresponding voltage under different K

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出版历程
  • 收稿日期:  2019-08-23
  • 修回日期:  2019-12-04
  • 刊出日期:  2019-12-26

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