Energy management in the decentralized generation systems based on renewable energy sources

The DC distribution in the multisource systems seems to be a reasonable solution because the supplied energy is in the DC form for several sources, such as the photovoltaic panels (PV), the batteries, and the Ultracapacitors. Additionally, the major parts of the used electronics devises in the buildings operate with the DC current, such as computers, air conditioning, and multimedia. Based on these remarks, the authors propose an energy management method for the decentralized energy generation systems. The studied system includes the renewable energy sources (wind energy, and photovoltaic panels), the energy storage devices (lithium-battery, and Ultracapacitors), a programmable DC-Source for the Diesel generator behavior emulation, and the electronics load which emulate the electrical energy consumption in the building. Contrary to the previously works, the proposed control method is focused on the residential micro-grid energy management according to the dynamic responses of the sources and their availability. The performances of the method are evaluated through some simulations and the experimental tests, dedicated to residential micro-grid applications.