Control Techniques for MPPT of Grid Connected Photovoltaic Systems

Abstract

A grid-connected PV system is analyzed in this paper using MPPT techniques. A major goal of research has been finding methods that extract solar energy more efficiently, which has attracted numerous researchers towards photovoltaics (PVs). The nonlinear behavior of the device determines its output based on a variety of factors, including solar temperature and ambient irradiance. Using MPPT techniques, PV cells can achieve their maximum output. P&O and incremental conductance are two MPPT techniques that are most commonly used in this paper. As well as PWM techniques, three grid-connected inverters operating at 240 kV are compared. Solar energy systems must use Maximum Power Point Tracking (MPPT) to maximize power output under variable irradiation and climate conditions. This research deals with two MPPT algorithms for PV arrays connected to the grid: Perturb and Observe (P&O), and Fuzzy Logic Control (FLC). Analyzing and comparing the results of both algorithms is performed using MATLAB/Simulink.