Design and Performance Evaluation of SMC-Based DC–DC Converters for Microgrid Applications

Qudrat Ullah (), Tiago Davi Curi Busarello, Danilo Iglesias Brandao and Marcelo Godoy Simões ()
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Qudrat Ullah: School of Technology and Innovations, University of Vaasa, 65100 Vaasa, Finland
Tiago Davi Curi Busarello: School of Technology and Innovations, University of Vaasa, 65100 Vaasa, Finland
Danilo Iglesias Brandao: Graduate Program in Electrical Engineering, Federal University of Minas Gerais (UFMG), Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
Marcelo Godoy Simões: School of Technology and Innovations, University of Vaasa, 65100 Vaasa, Finland

Energies, 2023, vol. 16, issue 10, 1-17

Abstract: In recent times, DC microgrids (MGs) have received significant attention due to environmental concerns and the demand for clean energies. Energy storage systems (ESSs) and photovoltaic (PV) systems are parts of DC MGs. This paper expands on the modeling and control of non-isolated, non-inverting four-switch buck-boost (FSBB) synchronous converters, which interface with a wide range of low-power electronic appliances. The proposed power converter can work efficiently both independently and in DC MGs. The charging and discharging of the battery are analyzed using the FSBB converter at a steady state in continuous conduction mode (CCM). A boost converter is connected to a PV system, which is then connected in parallel to the battery to provide voltages at the DC bus. Finally, another FSBB converter is connected to a resistive load that successfully performs the boost-and-buck operation with smooth transitions. Since these power converters possess uncertainties and non-linearities, it is not suitable to design linear controllers for these systems. Therefore, the controlling mechanism for these converters’ operation is based on the sliding mode control (SMC). In this study, various macro-level interests were achieved using SMC. The MATLAB Simulink results successfully prove the precise reference tracking and robust stability in different operating modes of DC–DC converters in a MG structure.

Keywords: modeling; control; DC–DC converter; sliding mode controller; DC microgrid (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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