Harmonic Suppression Analysis of PR and PI Controllers in Single Phase Inverter

As new energy is connected to the power system through grid connected inverters, grid connected inverter technology has become an essential part of new energy power generation. Traditional single-phase inverter mostly adopts PI control, but it cannot realize the zero free tracking of reference current, and PR controller can well meet this requirement. This paper first introduces the topology of single inverter and compares the performance of single inverter controlled by PI and PR. PR control can effectively eliminate the interference of grid voltage on grid connected current. Finally, single inverter simulation models of PI and PR control are established to prove the validity of the conclusions.