200 kV小型低电感气体开关

伍友成; 杨宇; 耿力东; 曹龙博; 冯传均; 王敏华; 张南川; 郝世荣; 谢卫平

doi:doi:10.11884/hplpb201426.045034

强激光与粒子束, 2014, 26 (4): 045034, 网络出版: 2014-04-24

200 kV小型低电感气体开关

200 kV small gas switches with low inductance

论文大纲

伍友成 ^*杨宇耿力东曹龙博冯传均王敏华张南川郝世荣谢卫平

作者单位

中国工程物理研究院流体物理研究所，脉冲功率科学与技术重点实验室，四川绵阳 621999

脉冲功率源 Marx发生器场畸变开关击穿电压开关电感 pulsed power supply Marx generator field distortion switch breakdown voltage switch inductance

摘要

为减小脉冲功率源装置的体积，对场畸变三电极轨道气体开关和两电极轨道气体开关结构进行了小型化低电感设计，采用电磁场仿真软件对局部结构进行优化，对初步设计的触发开关和自击穿开关在不同气压(0～0.3 MPa)和不同气体介质(N2，SF6，以及二者混合)条件下的击穿电压及导通电感等进行了研究。研究表明: 小型触发开关和自击穿开关在0～0.3 MPa气压范围内自击穿电压随气压具有较好的线性关系; 相同气压下SF6气体的自击穿电压约为N2气体的两倍; N2与SF6压力按3∶2混合的自击穿电压约为纯SF6气体的0.8～0.9倍; 内部充入0.25 MPa 气压的SF6气体时，触发开关和自击穿开关均可在190 kV左右正常工作。根据实验中出现的开关沿面击穿现象，对开关的沿面绝缘能力进行了优化设计，并得到了实验验证。另外通过短路放电测试，得到触发开关电感约22 nH，自击穿开关电感约20 nH，开关导通电流大于20 kA，多次放电后电极烧蚀痕迹分布均匀。

Abstract

A small tri-electrode gas switch and a small two-electrode gas switch are designed. Experiments for self-breakdown voltages of two-electrode gas switches and operating voltages of tri-electrode gas switches have been carried out in different conditions. The inductances of these switches have also been tested. The experimental results show the relation between self-breakdown voltages and gas pressures (0~0.30 MPa, relative) is nearly linear. The self-breakdown voltage of two-electrode gas switches with 11.9 mm gap and full of 0.25 MPa SF6 is up to 190 kV. The self-breakdown voltage by linear extrapolation can be up to 210 kV while the gap is 11.9 mm and inner SF6 pressure is 0.30 MPa. Operating voltages for tri-electrode gas switches with 11 mm total gap can be ranged from 90 kV to 200 kV by adjusting inner SF6 pressure from 0 to 0.30 MPa. Short circuit experiments reveal that the inductance of the two-electrode switch is about 20 nH and the one of the tri-electrode switch is about 22 nH. Thus the results tested for inductances are close to the values calculated.

参考文献

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伍友成, 杨宇, 耿力东, 曹龙博, 冯传均, 王敏华, 张南川, 郝世荣, 谢卫平. 200 kV小型低电感气体开关[J]. 强激光与粒子束, 2014, 26(4): 045034. Wu Youcheng, Yang Yu, Geng Lidong, Cao Longbo, Feng Chuanjun, Wang Minhua, Zhang Nanchuan, Hao Shirong, Xie Weiping. 200 kV small gas switches with low inductance[J]. High Power Laser and Particle Beams, 2014, 26(4): 045034.

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