Maximum power tracking for PVs with improved tracking accuracy at irradiance transients

Perturb & Observe (P&O), and Incremental Conductance methods for MPPT algorithms applied to PV systems with fixed and variable step sizes already exist. This paper proposes a modification to the existing Variable Step Maximum Power Point Tracking (MPPT) method. The method avoids the complications which occur in the algorithm due to sudden, large irradiance changes. The proposed method is experimentally tested using a solar array and the results are compared with existing Variable Step method.