Control method and device for suppressing commutation failure of converter valve based on full-control device

The invention relates to a control method, device and equipment for suppressing commutation failure of a converter valve based on a full-control device, and the method comprises the steps: replacing all thyristors of a conventional DC converter valve bridge arm with the full-control device, and determining an output turn-off signal according to the parameters of the full-control device. Only the full-control devices are in a turn-off state and receive forced turn-off signals or periodic turn-off signals, the corresponding full-control devices are controlled to be turned off after the turn-off delay time is delayed, that is, bridge arms of the converter are locked, current of the converter valve is subjected to forced commutation, and forced commutation of the inverter side converter valve is achieved. Through the control method for suppressing the commutation failure of the converter valve based on the full-control device, the commutation failure fault can be eliminated, and the safety and the stability of a