A novel Lyapunov stable higher order B-spline online adaptive control paradigm of photovoltaic systems. (December 2019) - Kamal, Tariq
Highlights: A new online adaptive neuro-fuzzy MPPT control of PV system is presented. The application of B-spline membership functions is used for the first time in solar energy. The proposed controller is stable as demonstrated using Lyapunov stability analysis. A high performance of proposed model over other well-known MPPT techniques is presented. Abstract: In this paper, research on the control of photovoltaic (PV) using a novel higher order B-spline online adaptive neuro-fuzzy paradigm considering high external uncertainties in weather and load demand is presented. We optimize the existing neuro-fuzzy technique by incorporating third order B-spline membership functions in its antecedent part, which we solve using an on-line learning gradient-decent back propagation method. We fit the system parameters online through adaptive fuzzy rules extracted from the maximum power point tracking (MPPT) error and its derivative. Unlike many existing neuro-fuzzy techniques, our method addresses the trapping in local minima. The proposed controller is demonstrated to be stable using Lyapunov stability analysis. The performance of our control philosophy is checked in terms of output power tracking, efficiency, and MPPT error. Finally, we validate via simulation the high robustness and the self-adaptation ability of the proposed method over other existing traditional and intelligent techniques.