Photovoltaic array MPPT based on improved variable step size incremental conductance algorithm

According to analyze the output characteristics of photovoltaic (PV) array and the advantages and disadvantages of the traditional maximum power point tracking (MPPT) method, an improved increment conductance (INC) method was proposed. Using MATLAB/Simulink modeling and simulating the boost DC/DC convert system, apply the improved method and the traditional INC to control the system respectively. The simulation results show that the improved method in the premise of ensuring stability of the system, make the PV array tracking the maximum power point more quickly and exactly under the change of circumstance.