基于击距法的高速铁路牵引网防雷特性研究

Research on Lightning Performance of Traction Network for High-speed Railway Based on Striking Distance Method

研究目的:近年来,雷击引起高速铁路牵引网跳闸事故增多,严重危及铁路运营及人身安全。本文意在利用击距法模型对高速铁路高架桥段牵引网典型布置方式下雷击特性进行定量分析计算。研究结论:计算结果表明,牵引网典型布置方式下发生雷击总跳闸次数很高,达25.37878次/(100 km·年),其中,雷击正馈线引起牵引网跳闸为25.150 8次/(100 km·年),占到总跳闸次数的99.1%,牵引网跳闸明显由雷击正馈线引起;提出了牵引网优化改进方案,以方案一为例,牵引网总的雷击跳闸次数仅为13.257 9次/(100 km·年),比典型布置方式下牵引网总跳闸次数降低了52.2%,对今后实施防雷具有重要参考价值。

Research purposes： Recently more lightning failures happened on the traction network for high - speed railway, which endangered the security of railway operations and personal. By the model of the striking distance method, the paper quantitatively calculates the total number of trip - out under the typical layout of the viaduct traction network for high -speed railway. Research conclusions： The results show that the total number of trip - out will be high in the typical layout of traction network, which will be 25. 37878 times per 100 kilometer per year. Among them, there are 25. 1508 times per 100 kilometer per year caused by striking on positive feeder, account for 99. 1 percent. Finally, the paper promotes a improved optimization schemes of the typical layout of traction network , Take first scheme as an example, the total number of trip - out have only 13. 2579 times per 100 kilometer per year. Compared with the typical layout of traction network, the total number of trip - out decreased by 52.2 percent, so which have the important reference value for lightning protection in the future.