基于先导传播模型的高速铁路接触网引雷特性  

Attracted Lightning Characteristics of High-speed Railway Catenary Based on Leader Propagation Model

作　　者：吴广宁[1] 张先怡[1] 李瑞芳[1] 曹晓斌[1] 张血琴[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《高电压技术》2015年第9期3021-3028,共8页High Voltage Engineering

基　　金：铁道部重大专项课题(2011T008);中央高校基本科研业务专项资金(2682014CX022)~~

摘　　要：高速铁路高架结构使得接触网对地高度增加,更易遭受雷击,针对高速铁路的特殊性进行引雷特性研究十分必要。通过建立高速铁路接触网的先导通道传播模型,计算了直击雷和感应雷的引雷范围,研究了雷电流幅值和高架桥高度对引雷范围的影响;并分析了雷电流幅值和高架桥高度对直击雷分布概率的影响。结果表明:高架桥高度为10 m时,当雷电流幅值从4 k A到200 k A变化时,直击雷引雷范围从48.46 m变化到202.96 m,而只有当雷电流达到73.93 k A时,才会出现感应雷并且引雷范围随之增大;雷电流幅值一定时,随着高架桥高度从0增加到18 m时,直击雷引雷范围线性增加,出现有效感应雷的临界电流值增大,引雷范围减小。所以在平地上或高架桥高度较小时不能忽略感应雷的存在。The catenary height above ground increases because of viaduct used extensively in the high-speed railway. So it is necessary to research high-speed railway because it will be more easily suffered from lightning than ordinary rail- way.Therefore, we established a leader propagation model （LPM） of high-speed railway in order to calculate the attracted lightning range of direct lightning and induction lightning. Moreover, we researched the influences of current amplitude of lightning and viaduct height on it. Then we discussed the influence of lightning current amslitude and viaduct＇s height on the distribution probability of direct lightning. The results show that, when the viaduct height is 10 m, the attracted lightning range of direct lightning increases from 48.68 m to 202.46 m with the lightning current amplitude changing from 4 kA to 200 kA. And there is no induction lightning until the lightning current amplitude increases to 73.93 kA. With the lightning current amplitude increasing, the attracted lightning range of induction lightning will increase. When the lightning current amplitude is fixed and viaduct height changes from 0 to 18 m, the attracted lightning range of direct lightning increases linearly, the critical lightning current amplitude about effective induction lightning increases, and the attracted lightning range of induction lightning decreases. While the viaduct height is 0 or very low, we can not ignore the induction lightning because its attracted lightning range is wider.

关 键 词：高速铁路 接触网 先导传播模型 引雷范围 雷电流 高架桥 

分 类 号：U225[交通运输工程—道路与铁道工程]