【摘要】 根据雷电电磁场作用于架空线路的特点和传输线理论,利用行波状态下架空线路上雷电感应电压、雷电感应电流与线路波阻抗的关系,推导了单股、双股平行架空线路上的雷电感应电流的估算公式,对架空线路高度、架空线路距雷击点距离、架空线路线径、架空线路旁被雷击物体的高度以及迎面先导长度等各类参数对雷电感应电流的影响进行了分析。结果表明,架空线路雷电感应电流与雷击电流幅值和架空线路高度成正比,与架空线路距雷击点距离、架空导线截面半径成反比;当架空线路为单股导线和双股护导线时,雷电感应电流与回击点高度成反比;当架空线路为分离的双股平行导线时,雷电感应电流随回击点高度的变化先增后减,当回击点高度与架空线路高度相等时出现极大值。更多还原

【Abstract】 According to the characteristics of the action of lightning electromagnetic field on overhead lines and transmission line theory,the calculation formulas of lightning inducing current on the parallel overhead lines is given by the relation among lightning inducing voltage,lightning inducing current and wave impedance of line at the state of traveling wave.The relative influences are analyzed on some factors such as the height of an overhead line,the distance between overhead line and lightning stroke point,the wire radius,the height of the object beside the overhead line,the length of a rising leader and lightning parameters.The results are as follows.The lightning inducing current and amplitude are proportional to height,and inverse proportional to the distance of stroke point and section radius.When the overhead lines are single or double protective conductor,the lightning inducing over-current is inverse proportional to the height of stroke point.As for the separation of the two parallel conductors,the lightning inducing current increased first and then decreased following the height changing of stroke point.When the stroke point is as high as overhead line,it gains the maximum value.更多还原