Grid Connected Inverter with Active Power Filter Capabilities for Two-phase Systems

The integrated operation of a grid connected inverter acting at the same time as shunt active power filter is presented. The paper shows that the same hardware can be used for active power injection from PV arrays to the mains, reactive power compensation with current harmonic mitigation, and active power balancing in two-phase residential systems. A three-leg two-level voltage source inverter is used for this aim and current loops based on DC link voltage control are developed.