Phase compensation-based grid-connected inverter grid-connected harmonic current suppression method and device

The invention relates to the technical field of power conversion and electric energy quality management, and provides a grid-connected harmonic current suppression method and device based on a phase compensation grid-construction inverter, and the method comprises the following steps: carrying out the harmonic detection of a grid-connected point voltage and a grid-connected current through a reduced-order generalized integrator with phase compensation, obtaining harmonic components of the grid-connected point voltage and the grid-connected current; determining a harmonic compensation voltage according to the grid-connected point voltage and the harmonic component of the grid-connected current; and obtaining a control reference voltage instruction according to the harmonic compensation voltage and the fundamental wave reference voltage so as to control the inverter through the control reference voltage instruction. According to the invention, the harmonic current can be effectively and timely suppressed, and t