A PI + Sliding-Mode Controller Based on the Discontinuous Conduction Mode for an Unidirectional Buck–Boost Converter with Electric Vehicle Applications

Ileana González, Antonio Sánchez-Squella, Diego Langarica-Cordoba, Fernando Yanine-Misleh and Victor Ramirez
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Ileana González: Centro de Investigación Científica de Yucatán (CICY), Department of Renewable Energy, Mérida 97205, Mexico
Antonio Sánchez-Squella: Department of Electrical Engineering, Universidad Técnica Federico Santa María, Santiago 8940000, Chile
Diego Langarica-Cordoba: School of Sciences, Universidad Autónoma de San Luis Potosí (UASLP), San Luis Potosí 78295, Mexico
Fernando Yanine-Misleh: Faculty of Engineering, Universidad Finis Terrae, Santiago 7501015, Chile
Victor Ramirez: Centro de Investigación Científica de Yucatán (CICY), Department of Renewable Energy, Mérida 97205, Mexico

Energies, 2021, vol. 14, issue 20, 1-15

Abstract: This paper solves the buck–boost converter operation problem in the discontinuous conduction mode and the feeding a DC bus of a combined battery/solar-powered electric vehicle grid. Since the sun’s radiation has a very important effect on the performance of photovoltaic solar modules due to its continuous variation, the main task of the system under study is the regulation of the output voltage from an MPPT system located at the output of the panels in order to obtain a DC bus voltage that is fixed to 24 V. This is ensured via a double-loop scheme, where the current inner loop relies on sliding-mode control; meanwhile, the outer voltage loop considers a proportional–integral action. Additionally, the current loop implements an adaptive hysteresis logic in order to operate at a fixed frequency. The closed-loop system’s performance is checked via numerical results with respect to step changes in the load, input voltage, and output voltage reference variations.

Keywords: DC/DC power converters; buck–boost converter; discontinuous conduction mode; sliding-mode control; proportional–integral control; electric vehicles (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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