A hierarchical control architecture for AC micro grids with distributed energy storage system, photovoltaic generation and loads for a coordinated active power regulation to ensure efficient use of renewable energy

A hierarchical control architecture for AC micro grids with distributed energy storage system, photovoltaic generation and loads for a coordinated active power regulation to ensure efficient use of renewable energy

In an islanded AC micro grid with distributed energy storage system (ESS), photovoltaic (PV) generation and loads, a coordinated active power regulation is required to ensure efficient utilization of renewable energy, while keeping the ESS from overcharge and over discharge conditions. In this paper, an autonomous active power control strategy is proposed for AC islanded micro grids in order to achieve power management in a decentralized manner. The proposed control algorithm is based on frequency bus-signaling of ESS and uses only local measurements for power distribution among micro grid elements. Moreover, this paper also presents a hierarchical control structure for AC micro grids that is able to integrate the ESS, PV systems and loads.