Study on Scheme and Control Strategy of Through Co-phase Power Supply System for Electrified Railway
Research purposes:The traditional traction power supply system of electrified railway adopts different phase unilateral power supply,and the traction network needs to be provided with electric phase separation,which has no electricity area,and it is difficult to set electric phase separation in some railways.In this paper,the traction power supply system adopts through co-phase power supply,and the phase sequence of the whole line is consistent through AC-DC-AC conversion,so as to cancel the electric phase separation of the traction network and eliminate the dead zone.Research conclusions:(1)The characteristics of traditional different phase power supply and through co-phase power supply are analyzed,and the principle structures of two systems are given.(2)The mathematical model of the through co-phase power supply rectifier system is established,and the control algorithm based on PWM rectifier technology is given.(3)Taking the electrification reconstruction project of Jining-Tongliao Railway as the background,the simulation calculation is carried out to verify the effectiveness of the scheme.(4)Taking the electrified railway project as an example,the economic analysis is carried out and the payback period of investment is given.(5)The research content of this article can provide technical reference for the application of electrified railway through phase power supply system.
through co-phase power supplyelectrified railwayPWM controlelectric phase separation
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