Design, control and simulation of grid connected DC/AC microgrid for residential applications

A basic approach for grid connected DC/AC microgrid modeling using photovoltaic (PV) panels and Energy storage units accessible in this document. The system consists of a two stage power conversion. Solar PV supplies power for both DC and AC loads. Manufacturer datasheet is used for modeling the PV panel that could help to give a suitable way for the researchers to explore the PV generation issues. A battery storage system connected to dc bus via bidirectional converter is used to absorb the excess power whenever generation is more and deliver power to the load when generation is less to keep the bus voltage stable. The system continues to supply the local loads, incase grid discontinuity. Thus it eliminates hazards of islanding. The paper focuses on control and stability of dc bus voltage and energy management scheme. The integration of PV generation, battery storage and utility grid jointly with their linked control system is modeled in Matlab/Simulink and the efficiency of the system is verified by simulation.