雷电发展对高速铁路周围电场分布影响的研究

发布时间：2018-05-01 16:21

本文选题：高速铁路 + 高架桥　；参考：《高压电器》2017年08期

【摘要】：雷害是影响高速铁路安全稳定运行的关键因素之一,研究雷电先导作用下高速铁路周围电场的变化规律对于高速铁路雷击机理的阐明具有重要意义。文中结合先导法建立了高速铁路三维雷击仿真模型;通过调整导体携带电荷量、高度及侧面距离,来模拟不同雷电流幅值以及先导空间位置对高速铁路周围电场分布的影响;并对比分析了高架区段和路基区段高速铁路周围场强分布情况。研究发现,在雷电流幅值为数千安时,高速铁路周围仍有上行先导产生,因此认为在雷击计算中,雷电流较小情况仍需考虑上行先导;随着雷电流幅值、下行先导空间位置的变化,避雷线总是比其他导线更容易产生上行先导;高架区段接触网场强值约为路基区段的1.4倍,因此高速铁路雷电防护的防雷设计施工要求高架区段应高于路基区段。
[Abstract]:Lightning damage is one of the key factors that affect the safe and stable operation of high-speed railway. It is of great significance to study the variation of electric field around high-speed railway under the action of lightning guide for the elucidation of lightning strike mechanism of high-speed railway. In this paper, a three-dimensional lightning strike simulation model of high-speed railway is established by combining the lead method, and the influence of different lightning current amplitude and pilot space position on the electric field distribution around high-speed railway is simulated by adjusting the charge carrying capacity, height and side distance of the conductor. The field intensity distribution around high-speed railway in elevated section and subgrade section is compared and analyzed. It is found that when the lightning current amplitude is thousands of amperes, there is still an uplink lead around the high-speed railway. Therefore, it is considered that in the calculation of lightning stroke, the upstream forerunner should still be taken into account when the lightning current is small, and with the lightning current amplitude, With the change of the space position of the downlink guide, the lightning protection line is always more likely to produce the upward lead than other conductors, and the field strength of the overhead OCS is about 1.4 times that of the roadbed. Therefore, the design and construction of lightning protection of high speed railway should be higher than the section of roadbed.
【作者单位】：西南交通大学电气工程学院;
【基金】：中央高校基本科研业务费专项资金资助(2682014CX022) 国家自然科学基金资助(51507145)~~
【分类号】：U298

【相似文献】