Single-phase CHB photovoltaic inverter distributed control method capable of realizing MPPT (Maximum Power Point Tracking)

The invention discloses a single-phase CHB photovoltaic inverter distributed control method capable of realizing MPPT, and relates to the technical field of distributed control of photovoltaic inverters. The invention aims to solve the problem that an existing distributed photovoltaic inverter control strategy is not suitable for cascade connection of inverters with different capacities or different power generation capacities. According to the distributed control method for the single-phase CHB photovoltaic inverter capable of realizing MPPT, firstly, the output voltage Vdci and the current Ipvi of a photovoltaic module are sampled, and the real-time maximum power PMPPT-i of the photovoltaic module is obtained through an MPPT algorithm; meanwhile, the output voltage vout-i and the current iout-i of the inverter are sampled, and the output active power Pi is obtained through calculation. Then, according to a droop control law, an output voltage reference signal of the inverter can be obtained through calculat