低气压直流电压下流注放电特性与极性效应的反转  

DC Streamer Discharge Characteristics and the Reversion of Polarity Effect under Low Pressure Condition

作　　者：杨亚奇[1] 李卫国[1] Yang Yaqi;Li Weiguo(College of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

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：《电工技术学报》2018年第13期3080-3088,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51277063)

摘　　要：为研究低气压直流电压下流注放电特性与极性效应反转现象,利用低气压放电实验平台对0.1~10 kPa气压范围内50~200 mm棒-板间隙进行正、负极性直流放电实验研究,得到不同间隙和电压形式下的击穿电压U与气压p的关系曲线,并对流注放电通道外部特征以及低气压直流电压下极性效应随气压的变化规律进行分析。研究结果表明:0.1~10 kPa气压范围内,正、负极性直流电压下流注外形变化显著。正极性直流电压下正流注伸长程度随气压升高逐渐增加;负极性直流电压下间隙击穿由正、负流注共同完成,且随气压升高正、负流注伸长程度逐渐增加。负极性直流电压下50 mm和100 mm间隙阳极板电极表面自组织电离过程引发正流注是造成极性效应反转的原因,而150 mm和200 mm间隙阳极板电极自组织电离过程同时引发的多个正流注是造成极性效应反转的原因。研究结果为探讨空间环境低气压放电特性提供参考。To research the characteristics of streamer under DC voltage and the reversion of polarity effect under low pressure condition,this paper carried out laboratory investigations of positive and negative DC streamer discharges by low pressure discharge teat platform for 50-200 mm rod-plane gaps within 0.1-10 kPa.The relationship between discharge voltage U and pressure P of different gap length and voltage modes are obtained,and the change of external characteristics of streamer channel and variation of polarity effect with the increase of pressure value are analyzed.The results show that,the profile of streamer have significant differences within 0.1-10 kPa under positive and negative DC voltage.The elongation of positive streamer under positive DC voltage increases with pressure,and the breakdown under negative DC voltage result from positive and negative streamers together also lengthen with pressure.The positive streamer triggered by self-organized ionization formed on the surface of anode plane electrode of 50 mm and 100 mm gaps is the cause of the reversion of polarity effect,and the multiple positive streamers triggered by self-organized ionization simultaneously formed on the surface of anode plane electrode of 150 mm and 200 mm gaps is the reason of the reversion of polarity effect.These results have reference value for the study of discharge characteristics under low pressure condition.

关 键 词：低气压 直流电压 流注放电 空间电荷 极性效应 

分 类 号：TM852[电气工程—高电压与绝缘技术]