Integral Backstepping Control for Water Pumping System FED by MPPT Fuzzy-Logic PV Source

The work presented in this paper concerns modeling, and simulation of a controlled solar pumping system, composed of: photovoltaic panels, power converters, induction motor and the water pump. MPPT FUZZY-LOGIC approach gives better performance optimization of photovoltaic production system according to the sunshine in order to work permanently at the optimum operating point. The pump system is driven by an induction motor. For that, integral backstepping control structure is proposed. It gives interesting features in terms of stability using recursive Lyapunov design, increases robustness despite parameters variation, and provides a good tracking performance. Simulation of the proposed solution is validated under Matlab/Simulink. Results demonstrate clearly that the proposed control structure provides fast dynamic response and stable static power output, even when weather conditions (irradiation) are rapidly changing.