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雷电活动严重影响着高速铁路的安全可靠运行,为了准确评估地处多雷、干旱沙漠区域中接触网的雷电耐受能力,首先根据改进电气几何模型分析了接触网易受雷击的部位,然后利用ATP-EMTP软件建立雷击接触网模型,并对不同环境因素影响下的接触网耐雷水平进行仿真分析。结果表明:接触网支柱、正馈线及接触线易受雷击危害;不同的土壤类型下,接触网耐雷水平不同,且耐雷水平随气温以及土壤含水量的升高而升高,随绝缘子等值盐密的增加而降低。
Thunder and lightning activities seriously affect the safe and reliable operation of high-speed railway. In order to accurately evaluate the lightning tolerance of catenary in Dray and arid desert regions, firstly, the parts of catenary vulnerable to lightning are analyzed according to the improved electrical geometric model, -EMTP software to establish the lightning contact network model, and simulate the lightning-resistant level of the contact network under the influence of different environmental factors. The results show that the contact pillars, the feeder lines and the contact lines are easily damaged by lightning. Under different soil types, the contact resistance of mine catenary is different, and the level of lightning tolerance rises with the increase of air temperature and soil water content. The density increases and decreases.