轨道交通牵引供电网电磁辐射场强的数值模拟  

Numerical Simulation for Electromagnetic Radiation Field of High-voltage Traction Power Supply Grid in Urban Rail Transit

作　　者：陈习权[1] 韩海林[1] 孙杰[1] 

机构地区：[1]浙江省计量科学研究院,杭州310013

出　　处：《科学技术与工程》2012年第29期7659-7663,共5页Science Technology and Engineering

基　　金：浙江省自然科学基金(Y1110961);浙江省公益技术研究社会发展项目(2011C23056)资助

摘　　要：在分析城市轨道交通牵引供电系统工作原理与特点的基础上,针对人流集中的轨道交通站台建立了一种高压直流牵引系统下的静态电磁场模型,探讨了静态电磁场仿真的适用数值计算原理与边界条件处理方法。采用有限差分法对该电磁场模型进行了理论计算与数值模拟,结果表明:以轨道交通岛式站台中心为原点,在站台上1.7 m高处,往两侧电场强度与磁感应强度逐渐变大,在站台边缘处电场强度最大值达220 V/m,磁感应强度最大值达60μT,与电磁辐射场强的实地监测结果一致。Based on analysis of the working principle and characteristics of the traction power supply grid in ur- ban rail transit, one type of static electromagnetic field model under high-voltage DC traction system is established aimed at the flow-concentrated rail traffic platform, and the numerical calculation theory and the boundary condition processing method of the static electromagnetic field simulation is discussed. The established electromagnetic field model is theoretically calculated and numerically simulated by use of the finite difference method, and then the re- sult shows ： taking the island-platform＇ s center for the origin, the electric field intensity and the magnetic induction intensity gradually become larger and larger to both sides at the height of 1.7 meters above the platform, and at the edge of the platform the maximum value of electrical field intensity adds up to 220 V/m, the maximum value of magnetic induction intensity arrives at 60 T, which is in accord with the field monitoring results of the electromag- netic radiation field intensity.

关 键 词：城市轨道交通 牵引供电系统 电磁辐射场强 数值模拟 有限差分法 

分 类 号：O441.4[理学—电磁学]