Bus voltage feedforward decoupling control method based on LC type photovoltaic grid-connected inverter

The invention belongs to the field of grid-connected inverter control, and provides a bus voltage feed-forward decoupling control method based on an LC type photovoltaic grid-connected inverter. A voltage loop is adopted for bus voltage fluctuation control, and the effects of pre-adjusting and improving transient response are achieved; the voltage loop and given current are combined and output to serve as input of the current outer loop, and the current outer loop controls the current through PI control; the controlled current serves as reference input of a current inner loop, decoupling is achieved through proportional control, and a target reference wave is output; and after the target reference wave is subjected to SPWM modulation, an inverter switch is controlled to work according to a specified sequence, and finally, the network access current is controlled to meet specified requirements. An LCL structure is replaced by LC, so that the defects of high-order characteristics, system complexity and two harm