大气压空气中重复频率纳秒脉冲气体放电模式研究  

Discharge mode in the repetitive nanosecond-pulse discharge in atmospheric pressure air

作　　者：章程[1,2] 顾建伟[1,3] 邵涛[1,2] 马浩[1,3] 严萍[1,2,4] 杨文晋[1,2] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院电力电子与电气驱动重点实验室,北京100190 [3]中国科学院大学,北京100039 [4]电力设备电气绝缘国家重点实验室(西安交通大学),西安710049

出　　处：《强激光与粒子束》2014年第4期197-203,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51207154;51222701);国家重点基础研究发展计划项目(2014CB239505);电力设备电气绝缘国家重点实验室开放基金项目(EIPE12204)

摘　　要：利用上升沿100ns、脉宽150ns的单级磁压缩纳秒脉冲电源,通过电压电流测量和放电图像拍摄实验,研究了大气压空气中极不均匀电场结构重复频率纳秒脉冲气体放电的放电模式。结果表明纳秒脉冲气体放电存在三种典型的放电模式:电晕放电、弥散放电和火花放电。施加的脉冲电压幅值对放电模式影响显著,随着电压幅值的增加,放电依次经历电晕、弥散和火花放电。固定电压幅值时,放电可能同时存在两种模式。重复频率加强了放电强度,弥散放电的激发电压随重复频率的增加变化不大,但火花放电的激发电压随着重复频率的增加而降低。因此降低重复频率有利于在较大电压范围获得大气压空气弥散放电。With an excitation of one-stage magnetic pulse compressor generator of 100ns rise time and 150ns duration,discharge mode of nanosecond-pulse discharges in an inhomogeneous electrical field in repetitive pulsed modes.Characteristics of nanosecond-pulse discharges are experimentally investigated by measuring their electrical parameters,images and taking their discharge photos.Results show that there were three typical discharge modes,i.e.corona,diffuse and spark discharges.The discharge modes were significantly influenced by the applied voltage,as the applied voltage increased the discharges experienced corona-to-diffuse-to-spark transition.With a fixed applied voltage,two discharge modes might simultaneously exist.Furthermore, experimental results on the effect of the pulse repetition frequency(PRF)show that,the excitation voltages of the diffuse discharges were slightly influenced by the PRF,but the excitation voltages of spark discharges decreased with the increase of the PRF. Thus,small PRF was beneficial for obtaining diffuse discharges in atmospheric-pressure air in a broad range of the applied voltage.

关 键 词：纳秒脉冲 大气压空气 放电模式 弥散放电 重复频率 

分 类 号：TM89[电气工程—高电压与绝缘技术] TM213[一般工业技术—材料科学与工程]