Simulation and Analysis for Electromagnetic Environment of Traction Network

Due to the hidden safety hazards in the traction network of electrified railways in windy areas in China, it is necessary to study the influence of the protective wire landing on the traction backflow and power frequency magnetic fields. Therefore, in this paper, based on the theory of Multi-conductor Transmission Lines (MTL), a mathematical model of traction network is established to study the current distribution in each return conductor before and after the protective wire falls to the ground. The finite element method is used to establish a simulation model of the traction network under the normal working condition and the short-circuit fault condition of the contact wire and rail. The power frequency magnetic field generated by the railway traction network along the railway is simulated, and the influence of position of the protection line to the magnetic environment distribution along the railway is analyzed.