Analysis of Traction Power Supply System on Power System

In order to analysize the effects of the traction load on the harmonic wave and negative sequence voltage of power system,this paper studies the impedance Matching Balance Traction Transformer.Using PSCAD/EMTDC simulation model obtains three parameter values of positive sequence current,negative sequence current and voltage unbalance grade of traction transformer.The feasibility of modeling on PSCAD is proved by comparing the consistency between the parameters of the simulation and the ones calculated by the transformer mathematical model.Finally,according to the measured data,this paper ascertains the circs about the harmonic distortion and negative sequence component at the points of common connection and advances corresponding improved measures.