Electrolytic hydrogen production rectification power supply based on two-stage auxiliary converter and power supply control method

The invention discloses an electrolytic hydrogen production rectification power supply based on a two-stage auxiliary converter and a power supply control method. The electrolytic hydrogen production rectification power supply comprises a voltage source type PWM converter, a phase-shifted full-bridge converter, a multi-pulse thyristor converter, a three-phase LC filter, direct-current smoothing reactors L1 and L2, a decoupling capacitor Cs and a control device. And the multi-pulse thyristor converter is connected in parallel with a two-stage AC-DC converter. The multi-pulse thyristor converter is a main power rectifier and provides main power for a load, and the two-stage AC-DC converter is an auxiliary power rectifier and is used for compensating output ripples and input harmonics generated by thyristor rectifiers. After compensation, the ripple content of the direct current output total current of the hydrogen production rectification power supply is greatly reduced, the hydrogen production efficiency can b