Traction Power System Model and Simulation for Estimation and Forecast of Traction Load

This paper presents a traction power supply system modeling and simulation methods. When the traction substation parameters and the traction power supply section load current range and characteristics are known, this method can be used to estimate or to forecast the level of harmonic and negative sequence on traction substation primary side. Firstly, the principle and performance of YNvd traction transformer are introduced. Secondly the six mathematic models and PSCAD/EMTDC models of electrified railway traction transformers are built. Thirdly, the characters of traction load are discussed in detail, and the model of the traction load is done. Finally, the simulation is done on the condition of different kinds of transaction transformers, different traction load. The simulation results and theoretical analysis are consistent.