低温次大气压不均匀电场空气流注放电特性研究  

Study on Discharge Characteristics of Non-uniform Electric Field Air Streamer atLow Temperature and Sub Atmospheric Pressure

作　　者：赵志航 魏新劳[1] 姚远航 朱博[1] 聂洪岩 李毅恒 ZHAO Zhihang;WEI Xinlao;YAO Yuanhang;ZHU Bo;NIE Hongyan;LI Yiheng(Key Laboratory of Engineering Dielectrics and Their Applications,Ministry of Education(Harbin University of Science and Technology),Harbin 150080,Heilongjiang Province,China;School of Electrical and Automation,Wuhan University,Wuhan 430072,Hubei Province,China)

机构地区：[1]工程电介质及其应用教育部重点实验室(哈尔滨理工大学),黑龙江省哈尔滨市150080 [2]武汉大学电气与自动化学院,湖北省武汉市430072

出　　处：《中国电机工程学报》2023年第10期4034-4045,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51977051)。

摘　　要：搭建空气放电实验平台,并构建仿真模型,通过实验和仿真对低温次大气压不均匀电场空气流注放电特性展开研究。结果表明:当约化场强E/N相同时,海拔高度与流注分叉数目、流注传播速度、电流峰值以及电流衰减时间均呈负相关,与流注半径呈正相关,但仿真得到的流注传播速度和电流与实际相比略有不同;预电离区域的存在导致针-板和针-针电极结构下的放电形态不同;随着方波电压频率的增大,二次放电通道对于一次放电通道的依赖性逐渐增大。随着方波电压占空比的增大,二次放电通道仅在一次放电通道尾部有所体现。The air discharge experimental platform is built and the simulation model is constructed.Air streamer discharge of non-uniform electric field under low temperature and sub atmospheric pressure is studied through experiment and simulation.The results show that when the reduced electric field E/N is the same,the altitude is negatively correlated with the number of streamer bifurcation,streamer propagation velocity,current peak and current decay time,and positively correlated with streamer radius,but the streamer propagation velocity and current obtained by simulation are slightly different from the actual ones.The existence of pre-ionization region leads to different discharge morphology under needle-plate and needle-needle electrode.With the increase of square wave voltage frequency,the dependence of secondary discharge channel on primary discharge channel increases gradually.With the increase of square wave voltage duty cycle,the secondary discharge channel is only reflected at the tail of the primary discharge channel.

关 键 词：低温次大气压 不均匀电场 放电通道 方波电压 频率和占空比 

分 类 号：TM85[电气工程—高电压与绝缘技术]