Maximum power control of PV systems via a T-S fuzzy model-based approach

Abstract

This paper proposes a T-S fuzzy model based maximum power control to enhance the efficiency of the solar photovoltaic (PV) system. To draw the maximum power from a solar PV array, a buck converter is applied to adjust the output of PV power. Based on the T-S fuzzy representation, the fuzzy maximum power point tracking (MPPT) controller are developed to maintain the maximum power voltage. The MPPT control is achieved with asymptotic convergence, while control gains can be systematically designed by solving linear matrix inequality (LMI). Furthermore, the robust MPPT is also discussed to cope with varying atmosphere and system uncertainty. Satisfactory performance is shown from the numerical simulation and experimental results.