多参数下铁路接触网避雷线绕击率的计算

Calculation of Shielding Failure Rate of Lightning Conductor of Railway Catenary under Multi Parameters

在传统铁路电气几何模型基础上,考虑到击距系数、风速(包含风压不均匀系数、风偏角等)、雷电入射角等多参数的影响,对传统电气几何模型进行修正,使得雷电绕击率的计算更加精准以及切合实际。结果表明:击距系数越大,绕击率会越小;随着风速的增大,线路绕击率会明显增加;但随着雷电入射角的增大,线路绕击率出现了明显的降低。

Based on the traditional railway electrical geometry model,considering the influence of Strike distance coefficient,wind speed(including wind pressure non-uniformity coefficient,wind deflection angle,etc.),lightning incidence angle and other parameters,the traditional electrical geometry model is modified to make the calculation of lightning shielding failure rate more accurate and practical.The results show that the shielding failure rate increases with the increase of wind speed;However,with the increase of lightning incidence angle,the shielding failure rate of transmission line decreases obviously.