钢轨不平衡电流对应答器电磁特性的影响

Influence of Unbalanced Current in Steel Rails on the Electromagnetic Characteristics of Balise

为有效评估钢轨沿线电磁环境对应答器电磁特性的影响,以CRH5型电力动车组为例,建立了真实接触网接触线、应答器和钢轨的电磁仿真模型,分析了应答器分别在钢轨三种工况的不平衡电流作用下的空间及内部场分布。仿真结果表明:钢轨不平衡电流越大,空间磁通密度越大,应答器磁通密度峰值越大;应答器内部的磁通密度分布极不均匀;钢轨不平衡电流对x轴、z轴的电场强度分布没有影响。总之,钢轨不平衡电流是影响应答器电磁特性的主要因素,此工作可为提高机车运行的安全性提供技术和理论参考。

To effectively evaluate the influence of the electromagnetic environment along the steel rails on the electromagnetic characteristics of balise,based on the CRH5 EMU,the electromagnetic simulation model of the real contact line,balise and steel rails is established,and the spatial and internal field distribution of balise under three kinds of rail unbalanced current are analyzed.We find that the larger the unbalanced current in steel rails,the larger the spatial flux density and the greater the peak magnetic flux density of the balise;the magnetic flux density distribution inside the balise is extremely uneven;the unbalanced current of steel rails has no effect on the electric field intensity distribution of x-axis and z-axis.In a word,rail unbalanced current is the main factor affecting the electromagnetic characteristics of balise,which can provide technical and theoretical reference for improving the safety of locomotive operation.