低气压长间隙工频放电通道特性研究  

Research on Characteristics of Long Gap AC Discharge Channel Under Low Pressure

作　　者：杨亚奇[1] 李卫国[1] 夏喻[1] 袁创业 陈艳[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《华北电力大学学报（自然科学版）》2017年第3期45-49,共5页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51277063)

摘　　要：为研究低气压下长间隙工频放电通道特性,利用低气压放电试验平台对600 mm棒-板间隙在5 k Pa、15 k Pa、25 k Pa、35 k Pa、45 k Pa、55 k Pa气压值下的工频放电通道特性进行了试验研究,得到了低气压条件对放电通道外形、通道偏移角度以及通道起始前预放电过程的作用特点。研究结果表明:随气压升高空间电荷密度增大,在电子自由行程和碰撞几率的共同作用下放电通道逐渐收细、变亮,曲折和分叉特征逐渐明显;通道偏移角度逐渐减小;预放电过程由电晕变为刷状流注放电且预放电角逐渐减小。研究结果对研究低气压下长空气间隙放电特性提供参考。To find out the characteristics of long gap AC discharge channel under low pressure, experimental study is done to study the characteristics of the 600 mm rod-plane gap＇ s AC discharge channels under different pressure values of 5 kPa, 15 kPa, 25 kPa, 35 kPa, 45 kPa and 55 kPa by using the discharge test platform with low pressure. And the effects of low pressure condition on the discharge channel＇ s shape, deviation angel and pre-discharge process are obtained. The results show that, with the increase of pressure and space charge density, the discharge channels gradually become thin and bright, and the phenomenon of zigzagging and branching become clear under the combined action of the free path and collision possibility of electrons; the deviation angel of discharge channel gradually gets smaller; the process of pre-discharge changes from corona to brush-streamer discharge and pre-discharge angle decreases. These re- suits provide a reliable reference for the study of characteristics of long gap discharge under low pressure.

关 键 词：低气压 长间隙 放电通道 偏移角 预放电 

分 类 号：TM852[电气工程—高电压与绝缘技术]