Modified incremental conductance MPPT with direct control and dual scaled adaptive step-size method

Modified Incremental Conductance algorithm utilizing adaptive variable step-size is extensively employed in PV systems. As it offers merits of fast convergence and accurate MPP detection. The computational complexities of the IncCond method have been minimized by modifying the method for a division-free algorithm. However, improper scaling of the variable step-size - change of power - restricts the performance of the method. As a constant scaling factor offers either a slow voltage response or an overshoot. Therefore, to address these shortcomings this paper offers a mIncCond MPPT with direct control and dual scaled adaptive step-size method. The proposed MPPT scheme improves the performance of the conventional IncCond method by dual scaling the change of power for an adaptive step. This dual scaling prevents any overshoot and responds sudden changes in the atmospheric conditions. The enhanced performance offers a faster-tracking speed, accurate MPP detection, and reduced steady-state oscillation. The boost converter is utilized to prove the validity of the MPP scheme. In addition, the effects of battery load and resistive load have also been highlighted. Simulation results attained under static and dynamic conditions display the improved functionality and feasibility of the system.