Supervising PV/Battery/Diesel System Connected to Grid using Fuzzy Logic

In this paper we present modeling and simulation of a PV/Diesel/Battery system connected to grid with fuzzy logic controllers. The inverter receives increased interest in grid connected PV systems which converts the output direct current of PV to alternating current in order to inject power into grid, and a great deal of research has been done on inverter control. In this work, two fuzzy logic controllers were applied in inverter control. The first fuzzy logic controller was used to track maximum power point at PV array output. This technique named MPPT (Maximum Power Point Tracking). To control reactive power injected from inverter to grid or to diesel generator a second fuzzy logic controller was used in order to get voltage and current outputs signals in phase. This technique is named PFC (Power factor control). For this aim effectiveness, robustness and stability were verified in Matlab/Simulink.