In view of such power quality problems as voltage deviations and three-phase imbalances in the system due to the integration of a large number of distributed photovoltaic systems into the power distribution system

in this paper

a kind of method that can also manage the power quality without affecting the normal photovoltaic power generation is proposed. This method makes full use of the remaining capacity of the inverter to achieve comprehensive management of power quality. The algorithms of harmonic detection and imbalanced component detection in comprehensive power quality management is analyzed firstly. Then the command synthesis and current tracking control algorithms are studied. Finally

the effectiveness of the method is verified by simulation. The simulation results show that the method proposed in this paper has fairly good practicability.