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气体介质对多间隙气体开关电晕均压与自击穿特性的影响

刘现飞 唐钊 刘轩东

刘现飞, 唐钊, 刘轩东. 气体介质对多间隙气体开关电晕均压与自击穿特性的影响[J]. 强激光与粒子束, 2020, 32: 025012. doi: 10.11884/HPLPB202032.0358
引用本文: 刘现飞, 唐钊, 刘轩东. 气体介质对多间隙气体开关电晕均压与自击穿特性的影响[J]. 强激光与粒子束, 2020, 32: 025012. doi: 10.11884/HPLPB202032.0358
Liu Xianfei, Tang Zhao, Liu Xuandong. Effect of gas medium on corona discharge for voltage balance and self-breakdown characteristics in multi-gaps gas switch[J]. High Power Laser and Particle Beams, 2020, 32: 025012. doi: 10.11884/HPLPB202032.0358
Citation: Liu Xianfei, Tang Zhao, Liu Xuandong. Effect of gas medium on corona discharge for voltage balance and self-breakdown characteristics in multi-gaps gas switch[J]. High Power Laser and Particle Beams, 2020, 32: 025012. doi: 10.11884/HPLPB202032.0358

气体介质对多间隙气体开关电晕均压与自击穿特性的影响

doi: 10.11884/HPLPB202032.0358
基金项目: 国家自然科学基金青年基金项目(51207127)
详细信息
    作者简介:

    刘现飞(1997—),男,硕士研究生,从事脉冲功率技术的研究;liuxianfei2015@stu.xjtu.edu.cn

  • 中图分类号: TM85

Effect of gas medium on corona discharge for voltage balance and self-breakdown characteristics in multi-gaps gas switch

  • 摘要: 快脉冲直线变压器型驱动源(FLTD)是近年来快速发展的新型脉冲功率源技术,多采用多间隙气体开关作为开关器件。电晕均压措施有利于提升开关击穿性能,但不同气体中电晕放电有显著区别。本文首先研究了空气中针电极对单间隙电晕放电特性的影响,确定了电晕针电极的尺寸,之后研究了N2,CO2,SF6/N2混合气体、C4F7N/N2混合气体中的电晕放电特性,研究了电晕均压6间隙气体开关击穿电压及其稳定性随气体种类和气压的变化规律。实验结果表明,N2中电晕电流较大且不稳定,空气中电晕电流比N2中低,且电晕放电较为稳定,微量强电负性气体加入会极大降低电晕放电电流。当采用空气和N2作绝缘介质时,气体开关击穿电压随气压升高线性增加,但存在低值击穿,微量强电负性气体混合N2可显著提升击穿电压的稳定性。1%SF6/99%N2混合气体在0.18 MPa时,击穿电压约为197.33 kV,标准偏差占击穿电压比例为1.50%,1% C4F7N /99%N2混合气体在0.15 MPa时,击穿电压约为190.42 kV,标准偏差为0.55%。这表明,微量环保替代气体C4F7N与N2的混合气体对于提升多间隙气体开关击穿电压稳定性有显著作用。
  • 图  1  电晕均压多间隙开关结构图

    Figure  1.  Structure of multi-gap gas switch with corona needles for voltage balance

    图  2  单间隙电晕特性实验电路

    Figure  2.  Test circuit of single gap corona discharge characteristics

    图  3  多间隙开关自击穿特性实验电路

    Figure  3.  Test circuit of multi-gap gas switch self-breakdown characteristics

    图  4  不同针尺寸下单间隙电晕特性

    Figure  4.  Corona discharge characteristics of single gap under different needle size

    图  5  空气和CO2中不同气压下单间隙电晕特性

    Figure  5.  Corona discharge characteristics of single gap under different pressure in air and CO2

    图  6  N2中不同气压下单间隙电晕特性

    Figure  6.  Corona discharge characteristics of single gap under different pressure in N2

    图  7  SF6/N2与C4F7N/N2中不同气压下单间隙电晕特性

    Figure  7.  Corona discharge characteristics of single gap under different pressure in SF6/N2 and C4F7N/N2

    图  8  不同气体介质下不同气压击穿电压的分布

    Figure  8.  Distribution of breakdown voltage of different pressures in different gas media

    图  9  混合气体不同混合浓度下不同气压的击穿电压分布

    Figure  9.  Distribution of breakdown voltage of different pressures in mixtures of different mixed concentration

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出版历程
  • 收稿日期:  2019-09-16
  • 修回日期:  2019-12-20
  • 刊出日期:  2019-12-26

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