Dynamic voltage restorer (DVR)-based wind generating set low-voltage crossover supporting device

The utility model relates to a dynamic voltage restorer (DVR)-based wind generating set low-voltage crossover supporting device. The wind generating set low-voltage crossover supporting device consists of a DVR, an active power release circuit, a network side reactive current injection inverter and a controller, wherein the DVR is provided with a port A, a port B and a port C; the port A is connected with the output end of a wind generating set; the port B is connected with a power grid; the filter input side of the DVR is in series connected into a main loop; the output side of an H-bridge inverter is the port C; a direct-current capacitor is arranged in the port C; the reactive current injection inverter is provided with ports AC and DC; the port AC is connected with the port B of the DVR; the direct-current capacitor is arranged at the port DC; a stator Crowbar is provided with the ports AC and DC; the port AC is connected with the port A of the DVR; the direct-current bus capacitor is arranged at the port DC; and the working states of the DVR are controlled by triggering signals sent by the controller.