Modified MPPT Algorithms for Various Step Size and Switching Frequency using MATLAB/SIMULINK

Abstract

In this paper two modified MPPTs have been proposed. Modifications are done to Perturb and Observe algorithm and Incremental Conductance algorithm. These algorithms have been simulated in MATLAB/SIMULINK for fixed and variable step size and at two different switching frequencies (1 kHz, 10kHz) as well. Conventional PO and INC are compared with the modified algorithms. Their simulated results have been analyzed in many ways to find out the most efficient condition for a Maximum Power Point Tracker. The Modified INC is proved to be improved algorithm with 96.26% tracking efficiency for non-uniform insolation at 1 kHz switching frequency and 97.44% at 10 kHz respectively.