Modelling and simulation for the network-locomotive coupling of the co-phase continuous power supply and high speed railway

Shilong Chen, Xingwang Li, Guihong Bi, Junxiang Rong, Ruirui Cao 

School of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China

Co-phase continuous power supply system (CCPSS) can completely eliminate electric phase break to realize the co-phase continuous power supply in the traction substation, thus the impact on the power quality of the utility grid can be greatly reduced. In this paper, double-loop control strategy, which involves the load current feedback for three-phase pulse width modification (PWM) rectifier and single-phase inverter in the traction substation were proposed. Also, the control strategy with neutral-point-potential balance for three-level rectifier as well as the constant V/f control for asynchronous motor of electric locomotive was proposed. A network-locomotive coupling model of an AC-DC-AC traction substation and electric locomotive was built in this paper using PSCAD/EMTDC. Thorough simulations were conducted to demonstrate the effectiveness of the proposed control strategies.