Control strategy and simulation of a photovoltaic generator including energy storage

In the past few years the diffusion of renewable energy generators caused a transformation of the electrical system from the traditional centralized structure, with all the generating plants in high voltage transmission system, to a structure in which the generators are distributed on medium voltage and low voltage distribution system. The operation of electric grid requires a continuous real-time balance between the demand and the produced power; a balancing which is rather critical considering the massive penetration of non-programmable renewable generators into the grid. In this paper we discuss a control strategy for a photovoltaic generator including energy storage system to regulate the exchange of power between the costumer and the grid.