Simulation of Electromagnetic Fields Occurring at Intersection of Traction Networks and Three-Circuit Power Supply Line

N. Buyakova, A. Kryukov, Dmitry A. Seredkin
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Abstract

Traction networks (TN) 25 kV generate higher electromagnetic fields (EMF) with frequency 50 Hz, whose strengths at a standardized height of 1.8 m, as a rule, do not exceed the permissible norms for electrical personnel. In places where railroads routes intersect with high voltage overhead power supply lines (OPL), interference of fields, generated by the traction network and OPL, occurs. This can lead to an increase in strengths and a complication of the EMF spatial structures. The article presents simulation results performed for a complex intersection, while 25 or $2\times 25$ kV TN is crossed by a three-circuit 110 - 220 kV overhead power line at 90 degrees angle. Fazonord software application was used for simulating EMF strengths in points of traction networks and OPL intersection. Based on modeling results the following conclusions have been made: at intersection points of $1\times 25$ kV traction network with a three-chain 110 - 220 kV power transmission line, the electrical field strength does not exceed the value acceptable for electrical personnel and reaches 4.2 kV/m; at the intersection with $2\times 25$ kV traction network, this parameter decreases to 2.7 kV/m; the maximum amplitude of the magnetic field at the intersection points increases slightly.
牵引网与三回供电线路交汇处电磁场仿真
25kv的牵引网络产生的电磁场频率为50hz,在1.8 m的标准高度处,其强度一般不超过电气人员的允许标准。在铁路线路与高压架空供电线路相交的地方,会产生牵引网与高压架空供电线路产生的磁场干扰。这可能导致电磁场强度的增加和空间结构的复杂性。本文介绍了一个复杂的交叉路口的仿真结果,当25或2 × 25千伏TN以90度角由三路110 - 220千伏架空电力线穿过时。采用Fazonord软件对牵引网和OPL交点的电动势强度进行模拟。根据建模结果得出以下结论:1 × 25 kV牵引网与三链110 ~ 220 kV输电线路的交点处,电场强度不超过电气人员可接受的值,达到4.2 kV/m;在$2 × 25$ kV牵引网交叉口,该参数减小到2.7 kV/m;交点处磁场的最大振幅略有增大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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