H-bridge cascade SVG black module redundancy method, control protection device and redundancy system

The invention provides an H-bridge cascade SVG black module redundancy method, a control protection device and a redundancy system, and the method comprises the steps: sending a bypass instruction to a black module when the black module appears in an SVG device; judging whether the black module is successfully bypassed or not by adopting a current unlocking technology from the moment when the bypass instruction is sent to a first preset duration T1, and if the bypass is successful, controlling the SVG device to switch to normal operation; otherwise, the bypass fails, and the SVG device is controlled to trip. By adopting the redundancy method and the control protection device thereof provided by the invention, the H-bridge cascade SVG device is not directly tripped for maintenance after the black module appears, but the bypass state of the black module is judged firstly, and then the operation state of the device is determined according to the bypass state, so that the tripping probability of the SVG device is