Power feedforward control method for single stage type three-phase photovoltaic grid-connected inverter

The invention discloses a power feedforward control method for a single stage type three-phase photovoltaic grid-connected inverter. The single stage type three-phase photovoltaic grid-connected inverter consists of a photovoltaic cell panel, a three-phase grid-connected inverter body and a filtering link. According to an inverter grid-connected control strategy, a current inner ring is provided with a PI (proportional integral) adjuster, a new PI computing method is used, an outer ring is controlled in a power feedforward manner, and the frequency and the phase of grid-connected current outputted by the inverter are the same with those of voltage of a power grid. The problem that parameters of the adjuster are not consistent in simulation and test is solved. Blindness of trial and errors of parameters of the PI adjuster in a test process is avoided, a test debugging process is accelerated, the time is saved, and the efficiency is high. The power feedforward control method has a wide application prospect in the field of grid connection of inverters.