Modeling and Simulation for Traction Power Supply System of High-Speed Railway

Traction power supply system is an electrical power network used to receive power from three phase power transmission system and supply power for the train driving on the single-phase AC power system electric railway, mainly composed of the traction substation, traction network, partition substation, switch substation and other components. Based on analysis of the compositions of high-speed railway traction power supply system and the autotransformer power supply mode in parallel entirely, this paper establish a simulation model of traction power supply system in the MATLAB/Simulink environment, and a variety of fault conditions in the traction power supply system are simulated, therefore, provided a reference for research on the protection scheme and fault impedance location scheme.