A robust fuzzy logic PI controller for solar system battery charging

Mohammed Zerouali, Abdelghani El Ougli, Belkassem Tidhaf

Abstract


This article discusses a design of a photovoltaic (PV) system that allow charging a battery under variable climatic circumstances. The system under study is composed of two DC-DC converters a boost and Buck converter. The first one is used to extract the maximum power from the PV array through a novel variable step size P&O based MPPT offering a high tracking accuracy compared to classical approaches such PO and INC. The second converters aim at regulating the output voltage and current that feeds the battery using a robust optimal PI (O-PI) which has a faster time response and high accuracy compared to classical PI and PID controllers. The overall system and thecontrol strategies are tested and validated in MATLAB/Simulink environment. The simulations results show the effectiveness and the robustness of the system.

Keywords


Battery; Optimal PI; Photovoltaic system; PID controller; Variable step size P&O

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DOI: http://doi.org/10.11591/ijpeds.v14.i1.pp384-394

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