Electrolytic hydrogen production rectification power supply based on high-transformation-ratio transformer and control method

The invention discloses a control method of an electrolytic hydrogen production rectification power supply based on a high-transformation-ratio transformer. The control method comprises the following steps of: acquiring the voltages ua, ub and uc of an alternating current bus, and acquiring an output voltage udc1 of a 6-pulse thyristor rectifier and an output voltage uinv of a single-phase H-bridge inverter; obtaining a reference phase of the a-phase voltage ua by using a phase-locked circuit; adjusting the output voltage of the 6-pulse thyristor rectifier through a control signal; determining a control signal of the single-phase H-bridge inverter according to a target voltage, and adjusting the output voltage of the single-phase H-bridge inverter to a target value through the control signal; and after a high-transformation-ratio step-down transformer is connected in series, obtaining compensation voltages ucom which are equal in amplitude and ripple voltage component and opposite in direction to achieve ripp