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Improvement of power quality for hybrid PV-FC power supply system

Among renewable energy systems, a great deal of research has been conducted especially on photovoltaic effect and fuel cell in the recent day. The paper introduces hybrid photovoltaic-fuel cell system for supplying power charges for integration in the isolated site or an autonomous integration taking into account the enhancement of the sustainable energy. The renewable sources of the hybrid power system consist of PV array and a Proton Exchange Membrane (PEM) fuel cell. This type of combination is the most efficient one. For PV array a DC-DC converter is employed to maximize the panel power. The proposed topology benefits of the one common DC-AC inverter which injects the generated power to supply the charge. The idea of this article is to describe the sharing of load in a system of hybrid supply with photovoltaic panels and fuel cell PEM. During day, when the period of sunshine is sufficient, the used load is fed by the photovoltaic system. The fuel cell being considered as a source of supplement takes over, when the weather situation during day is not favorable, or during night: absence of illumination. The system of supply maintains a constant output voltage in border of the load using a permutation algorithm, which controls the power system. The developed control system has been successfully tested in order to verify the functionality of the two sources. More that for autonomous operation, the cost and reliability of energy is reduced because the hybrid system proposed need energy storage (battery) for few seconds.