Braking Energy Feedback of Train and Its Simulation

The principle of braking energy feedback of train and its power topology,mathematical model,and control algorithm are studied in this paper.The mathematical model and simulation model of using three-level topology which is controlled by hysteresis current SPWM to achieve braking energy feedback of train are established by using theoretical analysis and Matlab tool.The simulation of braking energy feedback of train indicates that the system can not only allow two-way flow of energy,but also suppress harmonics into the power grid effectively.Its power quality indicators meet relevant synchronization standards,hence it can be considered to synchronize to absorb feedback power.