Photovoltaic energy processing for utility connected system

In this work the study of a system for exploitation of the energy provided from photovoltaic panels is presented. Through this system the energy is converted, adapted and injected into the electric utility grid. In this way an amount of electrical energy consumed by one given customer is produced, having the advantage that it can be installed easily in the proper place of consumption, dispensing with the use of a transmission system. The current has sinusoidal shape in the system output, taking as reference the electric grid, obtaining low total harmonic distortion, thus the quality of the electric energy is preserved. Moreover, other requirements are achieved, as the galvanic isolation between the panels and the utility grid, and the protection against energy failure. The power stages, the control strategy, the system's operation principle, the simulation and experimental results acquired with the prototype constructed in the laboratory are presented.