CAJ | 학술논문

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。
근거뇌전전자장작용우가공선로적특점화전수선이론,이용행파상태하가공선로상뇌전감응전압、뇌전감응전류여선로파조항적관계,추도료단고、쌍고평행가공선로상적뇌전감응전류적고산공식,대가공선로고도、가공선로거뢰격점거리、가공선로선경、가공선로방피뢰격물체적고도이급영면선도장도등각류삼수대뇌전감응전류적영향진행료분석。결과표명,가공선로뇌전감응전류여뢰격전류폭치화가공선로고도성정비,여가공선로거뢰격점거리、가공도선절면반경성반비;당가공선로위단고도선화쌍고호도선시,뇌전감응전류여회격점고도성반비;당가공선로위분리적쌍고평행도선시,뇌전감응전류수회격점고도적변화선증후감,당회격점고도여가공선로고도상등시출현겁대치。
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.