Grid-Forming Microinverter and Method Based on Bidirectional Flyback Converters

A grid-forming microinverter method based on bidirectional flyback converters, comprising the bidirectional flyback converters and a grid-forming microinverter, wherein

• the grid-forming microinverter comprises a power loop, a voltage loop, and a peak current control loop;
• and
• the method comprises:
• calculating active power and reactive power through an output voltage and an output current of the grid-forming microinverter;
• generating a reference signal of the voltage loop by using a preset power reference value based on a power loop control principle;
• generating a reference signal of the peak current control loop under control of the voltage loop according to an actual output voltage;
• and
• generating, according to primary-side current signals of the first bidirectional flyback converter and the second bidirectional flyback converter, a drive signal for each switch tube under regulation of the peak current control loop.