Regenerative braking energy feedback device and power supply system

The utility model discloses a regenerative braking energy feedback device and a power supply system. When the railway vehicle is braked, a first direct-current voltage of a direct-current bus of the railway vehicle is converted into a second direct-current voltage required by a direct-current power grid through the M first energy feedback converters, and the second direct-current voltage is converted into a second alternating-current voltage required by an alternating-current power grid through the N second energy feedback converters and the N power grid transformers. Therefore, according to the regenerative braking energy feedback system, regenerative braking energy can be fed back to the alternating-current power grids with different voltage levels and can also be fed back to the direct-current power grids with different voltage levels, the feedback mode of the regenerative braking energy is more flexible, and the expansibility is higher. 本实用新型公开了一种再生制动能量回馈装置及供电系统，在轨道车辆制动时将轨道车辆的直流母线的第一直流电压通过M个第一能馈变流器变换为直流电网