喷射等离子体触发气体开关导通特性  

Discharge characteristics of a gas switch triggered by ejected plasma

作　　者：张明康 刘轩东[1] 沈曦 梁成军 Zhang Mingkang;Liu Xuandong;Shen Xi;Liang Chengjun(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;Chengdu Power Supply Company of State Grid Sichuan Electric Power Co,Ltd,Chengdu 610000,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [2]国网四川省电力公司成都供电公司,成都610000

出　　处：《强激光与粒子束》2019年第12期78-83,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51207127)

摘　　要：利用内嵌微孔火花放电产生喷射等离子体、作用于两电极开关,研究了间隙距离、气压、气体种类、开关工作系数和电压极性配合等因素对等离子体喷射控制开关导通特性的影响。实验结果表明,等离子体喷射触发开关可在工作系数为10%的条件下可靠快速导通,当开关采用0.5 MPa_N2作为绝缘介质、间隙距离5 mm时,触发导通时延为11.7μs,抖动为1.42μs;当间隙距离增大到18 mm时,触发导通时延增大至19.7μs,触发可靠性降低;当工作系数由10%增大到60%时,触发导通时延由11.7μs降低至1.1μs。在确保开关自击穿电压一致的前提下,短间隙、高气压、负触发脉冲电压、正工作电压更有利于减小开关触发导通时延。High speed ejected plasma,generated by the discharge in an actuator,can be applied as a trigger to gas gap switch which is working at low coefficient or with wide gap.This paper studies the influence of working conditions of gas switch on the discharge characteristics of ejected plasma triggered gas switch.The effects of gap distance,gas type,gas pressure,switching coefficient and cooperation mode of trigger pulse polarity and main voltage polarity on the discharge characteristics of ejected plasma triggered gas switch were studied by experiments.The results indicate that the ejected plasma triggered gas switch can be reliably and rapidly triggered with switching coefficient of about 10%.When the gas pressure of N2 in the switch is 0.5 MPa and the gap distance is 5 mm,the delay time and jitter are 11.7μs and 1.42μs,respectively.When the distance increases to 18 mm,the probability is reduced,the delay time increases to 19.7μs.When the switching coefficient increases from 10%to 60%,the delay time decreases from 11.7μs to 1.1μs.With the same self-breakdown voltage,high pressure,short gap distance,negative trigger pulse and positive main voltage are better best choices to reduce the delay time.

关 键 词：喷射等离子体 气体开关 间隙距离 工作系数范围 导通特性 

分 类 号：TM56[电气工程—电器]