Advantages of grid-tied DC microgrid

The present work aims to investigate the advantages of the implementation of a grid-tied DC microgrid (MG), thus integrating several types of distributed generation, DC loads and the AC power grid. The distributed resources of the DC MG consist of a photovoltaic generation system in addition to a fuel cell generation unit. The control of the MG is performed in a decentralized manner, where each power converter connected to the DC bus performs certain features without a communication channel. The DC MG studied in this paper is able to operate in island mode and reject AC disturbances, by the implementation of an Energy Storage System connected to the DC bus by a bidirectional converter. Simulation results show the operation and viability of the aforementioned DC MG.