Grid-interfacing active power filters to improve the power quality in a microgrid

This paper proposes the application of the strategy control approach used for the shunt active power filter previously proposed by the authors to the inverter interface of each single micro-sources present in a Microgrid. In particular the attention has been focused on the power quality and var supporting issues. The main advantage of the proposed strategy control approach lies on the fact that all sensitive loads connected to the Point of Common Coupling (PCC) are immunized from the power quality problems. Moreover, the proposed control approach requests only local information. The effectiveness of the proposed control strategy approach applied to a Microgrid is illustrated.