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.
Keywords-high-speed railway, traction power supply system, autotransformer feeding, simulation modelI.
Because of sectioned power supply, there are a series of no-electricity neutral sections in every electrified railway. The way of a train running through neutral section is a special challenge for railway. A technology for multiple unit train directly running through neutral section with electric load and an automatic system based on this technology are introduced in this paper. With the use of this technology, the neutral segment can be electric fed by the two adjacent feeder lines one after another, and the electricity supply with the train hardly interrupted. It is no more necessary for the trains to frequently shut off electric load before neutral sections like in existing electrified railways, and it is also helpful to reduce speed loss and make passengers feel more comfortable. A prototyping system has been implemented and experimentally tested.
Keywords-high-speed railway; multiple unit train; running through neutral section with electric load; automatic systemI.
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