用闪电电气-几何模型分析架空线路雷电感应电压数值大小  

Analysis of Lightning-Induced Voltage Numerical Value on Overhead Lines by Lightning Electric-Geometry Model

作　　者：黄克俭[1] 王小飞[1] 贺姗[1] 杨足明 朱传林[1] 

机构地区：[1]湖北省防雷中心.武汉430074 [2]湖北省咸宁市气象局,湖北咸宁437000

出　　处：《电瓷避雷器》2013年第6期136-140,共5页Insulators and Surge Arresters

摘　　要：根据架空线路雷电感应过电压的估算公式,通过闪电电气-几何模型推理得出影响架空线路雷电感应过电压的雷击电流幅值I、架空线路高度hd、架空线路距雷击点距离S和回击点高度h四因子之间相互制约的关系。并依据其制约关系,全面分析了架空线路雷电感应电压数值大小。结果表明:若接闪时回击点高度h不等于零,当最小间隔距离S为3 m,在架空线路高度hd一定时,其架空线路雷电感应过电压Us在数值上为由雷击电流幅值I决定的最大值。该最大值远大于同等hd和I情况下接闪时回击点高度h等于零时的Us最大值。According to the estimation formula of lightning induction overvoltage in overhead lines, four interaction factors affecting the lightning induction overhead-voltage in overhead lines are reasoned out by lightning electric-geometry model. Those influences are： the lightning current amplitude I, the height of overhead line hd, the distance to strike point s and the height of return stroke point h. And on basis its restriction relationship, a comprehensive analysis of the overhead line lightning induced voltage numerical value is then given. The results indicate： the height of return strike point is not equal zero if it then flashed. When the minimum separation distance s for 3M, the height hd of overhead line is certain, the numerical value Us of lightning induced over-voltage in overhead lines is the maximum value of current amplitude by lightning strikes. This maximum value is far greater than hd in same condition and the Us maximum value which under situation i, the height of return strike point is zero.

关 键 词：雷电感应 架空线路 闪电电气-几何模型 电压数值 

分 类 号：TM863[电气工程—高电压与绝缘技术]