DCAC grid-connected control system applied to hydrogen fuel cell

The invention provides a DCAC grid-connected control system applied to a hydrogen fuel cell, and the system comprises a DCAC converter, and the DCAC converter comprises a current error generation device which is used for generating an error current signal according to a network access current feedback value and a network access current instantaneous target; the composite controller is connected with the current error generation module, the composite controller comprises a PI controller, at least one PR controller and a repetitive controller, and the input ends of the PI controller, the PR controllers and the repetitive controller are all connected with the output end of the current error generation module; a feedforward module; the first input end of the first summator is connected with the output end of the composite controller, and the second input end of the first summator is connected with the feed-forward module; the input end of the PWM module is connected with the output end of the first summator; the