A novel global MPPT algorithm for distributed MPPT systems

This paper is focused on the implementation of an original algorithm for global maximum power point tracking (GMPPT) in photovoltaic systems. The algorithm detects when partial shading occurs, thus eliminating unwanted voltage sweeping. The paper gives a detailed analysis on how the algorithm succeeds in finding the global maximum power point (GMPP) in a short time and all its highlights. The system is controlled by a DSP which implements a voltage and a current loop for a better response of the system in case of a luminosity step change. Simulation and experimental results are finally provided to verify the performance of the system.