Investigation on Photovoltaic Array Modeling and the MPPT Control Method under Partial Shading Conditions

On the basis of a five-parameter photovoltaic (PV) mathematical model, multipeak output model PV array under partial shading conditions (PSCs) is obtained by MATLAB simulation. Simulation and experimental results demonstrate that can simulate performance curves PSCs. Optimized particle swarm optimization (OPSO) used to control quickly accurately track global maximum power point (GMPP) modules Its main idea determine initial position particles remove acceleration factor random number in traditional (PSO) algorithm. Additionally, according distance between two consecutive peak points, value velocity obtained. The advantages OPSO include following: compared with PSO algorithm, computing time greatly shortened; it easy achieve MPPT low-cost microprocessor. In addition, optimizer designed improve PSCs, simulation experimentation have characteristics mode optimized show improves 13.4% PSC.