Nonlinear control of PV systems for power regulation

In this paper, the tracking control of nonlinear systems based on the fuzzy-model-based approach is proposed. A Fuzzy Controller (FC) was designed to drive the system states of the nonlinear system to follow those of a reference input. Stability conditions are derived to guarantee the system stability. Moreover, the proposed controller is designed to control the Maximum Power Point Tracking (MPPT) for a Photovoltaic (PV) system. Sufficient conditions are derived for robust stabilization in the sense of Lyapunov stability and are formulated of Linear Matrix Inequalities (LMIs). The design method employs the so-called Parallel Distributed Compensation (PDC). An application example on applying the proposed approach to a PV system was given.