A High-speed GMPPT Method Under Gaussian Laser Beam Conditions

Under Gaussian laser beam conditions (GLBC), multiple peaks are observed in the power-voltage (P-V) curve of a photovoltaic (PV) array, and a conventional maximum power point tracking (MPPT) algorithm is not suitable for both tracking accuracy and tracking speed. In this paper, formulas of per-unit output characteristics are proposed based on the current-voltage (I-V) curve and the power-voltage (P-V) curve of the PV array under GLBC, and then a global MPPT (GMPPT) method under GLBC based on fixed voltage control and perturbation and observation (P&O) method is proposed. Experiments are carried out to prove the effectiveness of the proposed GMPPT method and the results show that this method can track the global maximum power point quickly and accurately.