Simulation and practical implementation under different scenarios of indirect incremental conductance algorithm for MPPT of PV system

Simplicity and good tracking performance have made the incremental conductance (INC) algorithm for maximum power point tracking (MPPT) of photovoltaic (PV) systems the most widely used algorithm. This paper treats of simulation and practical implementation of the indirect INC algorithm with a conventional proportional integral (PI) controller under different scenarios. Firstly, a comparison between indirect INC algorithm and the direct one is carried out, and in which the indirect INC algorithm is shown to be superior. Secondly, a simulation using Matlab/Simulink program is conducted under standard climatic conditions, immediate change of irradiance and under immediate change of resistive load value. Finally, the validated indirect INC algorithm is implemented using a real prototype under the same scenarios as in the simulation.