降雨对短空气间隙直流放电的影响分析  

Analysis on DC Discharge Performance of Short Air Gap Under Rain Conditions

作　　者：蒋兴良[1] 周龙武[1] 袁耀[1] 向泽[1] 刘伟[1] 奚思建[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高电压技术》2015年第7期2350-2355,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724501/502/503);国家创新研究群体基金(51021005)~~

摘　　要：为研究降雨对短空气间隙直流放电的影响规律,对棒-板短空气间隙正极性直流放电特性进行了大量试验研究。在此基础上,深入分析及仿真研究了环境湿度、环境温度、雨水电导率及降雨强度等因素对短空气间隙直流放电电压的影响规律及其机理。结果表明:随着降雨强度增大,棒-板间隙中雨滴半径和数量增加,间隙最大电场强度随之增加,从而导致间隙正极性直流放电电压降低;随着雨水电导率增加或环境温度降低,间隙正极性直流放电电压降低;降雨强度对棒-板间隙正极性直流放电电压的影响程度比雨水电导率和环境温度大。To study the discharge performance of air gap under rain conditions, we experimentally investigated the influences of different environment conditions, ambient temperature, rain conductivity, and rain intensity on the dc breakdown voltage of rod-plane air gap. It can be indicated that the dc positive breakdown voltage of rod-plane air gap decreases with the increase of rain intensity because the maximum electric field in the air gap increases with the increase of the radius and number of droplets; the dc positive breakdown voltage of rod-plane air gap decreases with the increase of rain conductivity or the decrease of ambient temperature; and rain intensity more remarkably affects the dc breakdown voltage of rod-plane air gap than rain conductivity and ambient temperature.

关 键 词：降雨强度 雨水电导率 环境湿度 环境温度 空气间隙 直流放电 

分 类 号：TM85[电气工程—高电压与绝缘技术]