Design and Performance Evaluation of SMC-Based DC–DC Converters for Microgrid Applications
Author:
Ullah Qudrat1ORCID, Busarello Tiago Davi Curi12ORCID, Brandao Danilo Iglesias3ORCID, Simões Marcelo Godoy1ORCID
Affiliation:
1. School of Technology and Innovations, University of Vaasa, 65100 Vaasa, Finland 2. Department of Control, Automation and Computing Engineering, Federal University of Santa Catarina, Rua João Pessoa 2750, Blumenau 89036-256, SC, Brazil 3. Graduate Program in Electrical Engineering, Federal University of Minas Gerais (UFMG), Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
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.
Funder
Pró-Reitoria de Pesquisa (PRPq) da Universidade Federal de Minas Gerais Research Support Foundation of the State of Minas Gerais–FAPEMIG
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
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