A fuzzy logic controller for a hybrid PV/FC green power system

Design and utilisation of a fuzzy logic controller (FLC) for a hybrid photovoltaic (PV) and proton exchange membrane fuel cell (PEMFC) renewable power system is studied in this paper. The FLC is designed and utilised to compensate load changing effects as well as to establish a sustainable energy source by eliminating the effects of the changes on the source side. As well known, the output power of the PV source is directly affected from the sunlight. Therefore, changing solar irradiation levels of sunlight must be compensated as well not to affect the load side power balance. A DC/AC converter is used to control the power flow from the hybrid PV-PEMFC source to the load side by maintaining a sustainable source of power. All of the system components are modelled in Matlab/Simulink environment and combined with the FLC model, which is also developed in Matlab/Simulink environment by using functional blocks of the Simulink. © 2010 Inderscience Enterprises Ltd