FLTD系统放电开关自击穿性能优化  

Improvement of self-breakdown characteristic of multi-gap switch used for fast linear transformer driver

作　　者：孙铁平[1] 丛培天[1] 罗维熙[1] 

机构地区：[1]西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室,西安710024

出　　处：《强激光与粒子束》2016年第7期133-138,共6页High Power Laser and Particle Beams

基　　金：强脉冲辐射环境模拟与效应国家重点实验室基础研究项目(SKLIPR1301Z)

摘　　要：针对快前沿直线脉冲变压器驱动源(FLTD)系统中放电开关自击穿性能劣化的问题,模拟计算了带电线缆、FLTD模块结构对开关间隙电场分布的影响规律,研究分析开关自击穿性能下降的主要原因,开展了电晕针均压和电阻均压两种方式下开关自击穿性能对比实验,获得了不同电晕针长度、不同阻值开关自击穿电压的变化规律:两种均压方式下开关自击穿电压分别提高3.2%和4.3%。FLTD系统中放电开关有均压措施的情况下,系统自击穿电压提高8.9%,自放电概率降低60%,系统短路输出电流的稳定性明显提高,电流幅值提高8.1%,标准偏差减小30.8%。When the gas switch discharges in the FLTD,the self-breakdown characteristic turns worse compared to individually discharging.To solve the problem,the electric field distribution of the switch which is influenced by the cable and the FLTD module is simulated and computed.The main reasons for the decline of the switch self-breakdown characteristic are analyzed.The experiments of both corona needle for voltage-balance and resistance for equalization are individually developed.The results are obtained for different length of the corona needle and variable values of resistance.The self-breakdown voltage of the switch is separately improved by 3.2% and 4.3%for the two types of equalization.The self-breakdown voltage is improved by 8.9% and the pre-fire probability is reduced by 60%,when all of the gas switches are equipped with equalization in the FLTD stage.The stability of the FLTD output current is obviously improved.The amplitude of the output current is improved by 8.1% and the standard deviation is reduced by 30.8%.

关 键 词：气体开关 自击穿电压 电晕针 

分 类 号：TM85[电气工程—高电压与绝缘技术]