Dynamic voltage restorer bidirectional charging device and control method thereof

The invention provides a dynamic voltage restorer bidirectional charging device and a control method thereof, the dynamic voltage restorer bidirectional charging device comprises a charging AC/DC unit, a DC/DC unit and a human-computer interface unit, the input side of the AC/DC unit is connected with a power grid, the DC sides of the AC/DC unit and the DC/DC unit are connected in series, and the output side of the DC/DC unit is connected with a super capacitor; the AC/DC unit is used for converting three-phase alternating current into direct current voltage and providing constant direct current bus voltage for the DC/DC unit; the man-machine interface unit sets output voltage and current values according to the capacity and charging time requirements of the super capacitor, and issues the output voltage and current values to the DC/DC unit in a communication mode; the DC/DC unit charges the super capacitor according to a preset condition and feeds back the real-time voltage and the charging current of the su