Energy Saving Control of Subway Based on PMSM Traction Feedforward

Safe and comfortable subway has the advantages of energy saving and emission reduction. Regenerative braking energy can be effectively recycled in the frequent starting braking process. On the condition of braking energy leading to energy waste, the up of traction grid voltage can be seen in the scheme of permanent magnet synchronous motor (PMSM) vector control (VC) and inverter feedback regenerative braking energy, the coordination and optimization control is proposed and the whole structure is designed the model is built, including a power supply, a PMSM VC and the regenerative braking energy recovery. RT-LAB realtime simulation is made based on subway actual parameters. The simulation results show that the hybrid method can guarantee the stability of DC traction network voltage in the process of the regenerative braking energy inverter feedback, under the condition of effectively recycling of braking energy.