脉冲条件下绝缘介质气体沿面闪络发光特征  

Diagnosis on the optical images of surface flashover discharge channel under pulsed voltage in air

作　　者：李逢[1] 温伟峰[1] 蒋吉昊[1] 王勐[1] 危才华[1] Li Feng;Weng Weifeng;Jiang Jihao;Wang Meng;Wei Caihua(Institute of Fluid Physics,Key Laboratory of Pulsed Power, CAEP,P.O.Box 919-108,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院流体物理研究所,中物院脉冲功率科学与技术重点实验室,四川绵阳621900

出　　处：《强激光与粒子束》2018年第10期79-83,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51277168,51307155,51707180)

摘　　要：对大气环境中脉冲电压加载下绝缘介质沿面闪络放电开展了初步放电图像诊断研究。采用超高速可见光分幅相机诊断指状电极结构下有机玻璃材料在大气环境中不同时刻闪络通道发光图像特征。实验结果表明:闪络通道形成和扩张阶段中,阴极区域和阳极区域均产生放电发光,放电通道沿固体电介质表面快速贯穿,贯穿时间约15 ns,贯穿后发光通道逐渐扩张至一定区域,发光强度大,维持时间长,整体发光时间可持续到μs量级,放电通道内能量分布有所差异。We investigated the discharge channel optical images of surface flashover on insulator under pulsed voltage in air.The CCD camera was used to diagnose the flashover characteristics of PMMA with finger electrodes in air.The experiments show that discharges occurred in both cathode region and anode region in channel forming and expansion stage.The velocity of channel forming was fast in 15 ns.The channel region kept on expanding with high luminous intensity and the whole discharge lasted more than 1μs.Next,we would analyse the flashover physical process in air based on the discharge channel optical images.

关 键 词：大气环境 闪络 放电通道 发光图像 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]