Power flow control in low voltage AC microgrid using photovoltaic system and battery energy storage

An ac micro grid mainly consists of distributed generators an energy storage system and loads where the coordinated power management between these elements should be properly done in order to ensure efficient utilization of renewable energy resources. Since the renewable energy sources are inherent sources of supply the energy storage system plays an important role in managing the power flow between each and every elements of the microgrid by keeping the SoC of the ESS under safe region. In this study an autonomous power flow is proposed which is done through bus signaling method and the SoC conditions of ESS. The proposed control algorithm uses local controllers for regulating the bus voltage and frequency of the microgrid. Hence basic power management and voltage and frequency regulation is done within the microgrid.