垂直电极火花放电现象分析  

Analysis of Spark Discharge Effect of Vertical Electrode

作　　者：杨琳[1] 张敏[2] 吴昊[2] 刘凡[1] 陈名铭[2] 吴广宁[2] 

机构地区：[1]四川电力科学研究院,成都610071 [2]西南交通大学电气工程学院,成都610031

出　　处：《电瓷避雷器》2013年第2期49-52,共4页Insulators and Surge Arresters

基　　金：铁道部科技研究开发计划课题(编号:2011T008-D);国家电网公司科技项目(编号:2011-WG-4);四川电力科学研究院科技项目(项目名称:输电线路杆塔接地体的雷电散法机理研究)

摘　　要：为研究雷电流流过接地极的冲击接地特性,用圆筒中的泥沙代替土壤,研究不同泥沙中垂直电极的冲击特性,得到不同介质的火花放电规律。泥沙击穿电压随泥沙中水含量的增加而降低,盐沙由于导电性增加就不易产生火花放电效应;干沙击穿过程以空气间隙击穿为主,而湿沙击穿以热击穿为主。In order to study the characteristics of grounding electrodes under lightning currents, the impulse characteristics of vertical electrode in different sediment are researched by using sediment instead of soil in the cylinder, and the spark discharge rule of different medium is obtained. The breakdown voltage of sediment decreases with the increase of the water content in the sediment, the salt sand is not easy to produce a spark discharge effect due to the increased conductivity; The air gap breakdown plays the main role in dry sand breakdown process, however the wet sand breakdown process is mostly thermal breakdown.

关 键 词：火花放电 击穿电压 间隙击穿 热击穿 

分 类 号：TM863[电气工程—高电压与绝缘技术]