输电线路雷击概率及影响因素研究  

Research on Variation Regularity of Lightning Stroke Probability and Its Influencing Factors

作　　者：李瑞芳[1] 吴广宁[1] 马御堂[1] 甘立勇[1] 

机构地区：[1]西南交通大学,四川成都610031

出　　处：《四川电力技术》2010年第2期18-20,56,共4页Sichuan Electric Power Technology

摘　　要：雷击概率的研究对于有效的防雷、减小雷灾造成的危害有着非常重要的意义。首先分析了雷击的基本物理过程,根据雷击路径与场强最大方向一致的原理,假定场强最大方向为雷击概率较大的方向。在此基础上建立了雷击过程中先导放电阶段上下行先导电场分布的物理模型。分别研究了输电线路高度、所带电压极性、雷击角度几方面的因素对于雷击概率的影响,并得出以上几种因素对雷击概率影响的变化规律。对输电线路防雷工程有一定指导作用。Research of lightning stroke probability is very important to effective protection against lightning and decreasing the disaster caused by the lightning. Basic physical process is analyzed firstly. Let it be supposed that the direction of the largest electric field is also the direction of the largest lightning stroke probability, according to the principle that both the lightning path and the largest electric field are in the same direction. The physical model of leader discharge process on lighting paths is established based on the above - mentioned theory. The effects of the height of transmission lines, voltage polarity and lightning stroke angle on lightning stroke probability are researched respectively and the conclusion is obtained, which are useful to guide the protection project against lightning for transmission lines.

关 键 词：雷击概率 电压极性 雷击角度 

分 类 号：TM862[电气工程—高电压与绝缘技术]