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In this paper, we propose a grid-connected photovoltaic power system including batteries in order to provide prescribed reactive and real powers to the grid. According to the stochastic nature of the photovoltaic power, the main feature of the proposed system is to erase power fluctuations by designing a dedicated local control system. With batteries, the whole system is able to smooth the PV power and provides a power reference, which is required by the grid operator. Therefore, the photovoltaic systems can be integrated more efficiently in the grid system and participate to the grid stability. An equivalent continuous dynamic model and control design of the studied power system are proposed in this paper. Simulation results are given to validate the feasibility of the proposed system.
Date of Conference: 10-12 Sept. 2007