Power Management of a Residential Hybrid Photovoltaic Inverter with Battery Energy Storage System

This paper presents power management of a grid-connected photovoltaic (PV) inverter with battery energy storage system (BESS) for the residential application. The overall system is controlled at the grid level and converter level. At the grid level, the inverter is capable of regulating the power provided by the system controller. At the converter level, the inverter system with BESS can manage the power while considering the priorities of the battery or the grid, e.g., battery first and the grid first. Different controllers are designed to control the battery power, inverter power, and the PV power when their priorities are changed. The experimental results show that with the designed controllers, the system is not only capable of dealing with the local load and source change, but also can participate the system level control by regulating the amount power provided by the upper level controllers.