A Simplified and Effective GMPP Tracking Algorithm for Solar Photovoltaic System

This paper offers a new simplified and effective Global Maxima PowerPoint (GMPP) tracking method for a solar photovoltaic system under partial shading conditions (PSC). Because the solar radiation changes continuously throughout the day, it also changes the maximum power point on the voltage scale of the photovoltaic module. Hence the tracking of the global peak is important for efficient power withdrawal from the PV Array. The proposed algorithm calculates the different duty cycles near to all possible maxima, which apply to different solar irradiance at different time. Then select a duty cycle near to the maximum power available at that time. The Perturb and Observe (P&O) approach is applied at the selected duty cycle to achieve GMPP. The simulation studies are performed for different conditions of irradiance. The ideal single-diode model (ISDM) is used for modeling the photovoltaic (PV). For the effectiveness of the proposed method, it is compared with the conventional Perturb and Observe (P&O) for the different PSCs.