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Design and Simulation of a Solar Regulator Based on DC-DC Converters Using a Robust Sliding Mode Controller



Author(s)

Gaga Ahmed, Errahimi Fatima and ES-Sbai Najia

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DOI:10.17265/1934-8975/2015.09.007

Laboratory Renewables Energy and Intelligent Systems, Faculty of Science and Technology, University Sidi Mohamed Ben Abdellah, Fez BP 2202, Morocco

The MPPT (maximum power point tracking) is one of the most important features of a regulator system that processes the energy produced by a photovoltaic generator. It is necessary, in fact, to design a controller that is able to set the output value of      the voltage and ensure the working within the maximum power point. In this paper, we propose the application of the robust sliding mode control technique to a DC-DC buck converter which is combined with a classical P & O (perturbation and observation) algorithm to enhance the solar system efficiency. Dynamic equations describing the boost converter are derived and a sliding     mode controller for a buck converter is designed. It is shown that, this control approach gives good results in terms of robustness toward load and input voltage variations. The effectiveness of the proposed work is verified by the simulation results under PowerSim environment.

Photovoltaic generator, MPPT, DC-DC converter, Buck converter, sliding mode controller, P & O, PowerSim.