同塔四回输电线路的雷击跳闸率计算方法研究  

Calculation Method of Lightning Trip-out Rate from Four Circuits on One Tower Transmission Line

作　　者：柯维新 孙鹏焰 

机构地区：[1]鸿业电力设计有限公司,广东惠州516001

出　　处：《电力学报》2009年第5期353-358,共6页Journal of Electric Power

摘　　要：由于同塔多回输电线路在雷电性能发面与一般常规线路不同,因此不能单纯地利用规程进行计算。以330 kV和110 kV同塔混压四回输电线路为例,探讨了同塔四回输电线路的雷电特性计算方法。分别利用规程法和电气几何模型计算了线路的雷电绕击跳闸率,结果分析表明,同塔四回线路的雷电绕击跳闸率计算法不适合用规程法。探讨了行波法计算线路雷电反击跳闸率计算方法,确定以相交法为闪络判断依据,可得到较准确的混压同塔四回线路反击跳闸率。According to the lighting performance difference bettwen general transmission line and several-circuit transmission line on one tower,the lightning trip-out rate can＇t be calculated using regulation method. Taking the example of 330 kV and 110 kV four circuits on one tower, the calculation method of lightning trip-out rate from four circuits on one tower is discussed. Using regulation method and electric geometry method, the shielding failure trip-out rate is calculated. The results shows that the calculation can＇t using regulation method. Using travelling wave method,the claculation method of back striking trip-out rate is discussed. The exact back striking trip out rate can be acquired based on intersection method.

关 键 词：输电线路 同塔四回 雷电特性 绕击 反击 雷击跳闸率 

分 类 号：TM723[电气工程—电力系统及自动化]