单档距走廊法架设高压输电线路对地闪的影响

The Influence on Ground Flash from the HV Transmission Lines Erected with Statistical Method of Single-span Corridor

基于引雷空间理论及珠三角地区已有输电线路参数，建立了单档距走廊法统计模型，对不同地形环境下输电线路走廊区域的地闪定位数据进行了筛选，分析了输电线路架设前后雷电活动及地闪幅值概率分布规律，并基于有限元一模拟电荷法，对雷云先导与大地均匀静电场在置入输电杆塔前后的电场进行了计算及模拟仿真，分析了输电线路的架设对于地闪分布规律影响。结果表明：在不同地形环境下输电线路所产生的对于雷击落点的吸引效应是不同的，在山地环境下最为明显。

Based on the theory of attractive volume of lightning and the parameters of existing transmission lines of the Pearl River Delta region, the statistical method of single-span corridor is established in this paper. Selecting the lightning location data of the corridor area of transmission line in various terrain environments, the paper analyzes the probability distribution of lightning activity and lightning current amplitude before and after the erection of HV transmission lines, and makes calculation and simulation on the electrostatic fields of lightning leader and ground for the both cases based on finite element-charge simulation method to analyze the influence on ground flash from the HV transmission lines erected with statistical method of single-span corridor. The results show that the attractive effect from the transmission line is different in various terrain environments, and is greater in mountainous area.