Comparative Study of Individual and Hybrid Renewable Energy Systems (Photovoltaic, Wind Energy and Hybridization). Controlled by Fuzzy Logic Control

Abstract

The present paper describes and evaluates the performances of individual sources of photovoltaic system (PV), wind energy conversion based on permanent magnet synchronous generator (PMSG), and hybrid system that combines both sources (PV/WEC). This is done to determine which of them would be more efficient to provide reliable power with better performances based on their performances comparison. A fuzzy logic control (FLC) is used to maximize the output power of each of the mentioned systems. For the grid connection, an inverter is used to interconnect the systems controlled by the field oriented control (FOC) technique. The FOC technique aims to efficiently decouple the active and reactive powers and achieve a constant DC output voltage with a better power factor. Modeling using different control strategies has been thoroughly examined and discussed. The effectiveness of the control techniques was tested using MTLAB/Simulink software under varying conditions of sunlight, wind speed and output load adjustment. The simulation results confirmed the hybrid system higher efficiency and ability to supply a reliable power. The FLC controller robustness emphasized the instantaneous variation of weather variations and the feasibility of the decoupled control to guarantee a unity power factor.