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Energies 2018, 11(3), 594; https://doi.org/10.3390/en11030594

Control of a Charger/Discharger DC/DC Converter with Improved Disturbance Rejection for Bus Regulation

1
Departamento de Electrónica y Telecomunicaciones, Instituto Tecnológico Metropolitano, Carrera 31 No. 54-10, Medellín 050013, Colombia
2
Departamento de Energía Eléctrica y Automática, Universidad Nacional de Colombia, Carrera 80 No. 65-223, Facultad de Minas, Medellín 050041, Colombia
*
Author to whom correspondence should be addressed.
Received: 29 January 2018 / Revised: 8 February 2018 / Accepted: 21 February 2018 / Published: 8 March 2018
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Abstract

Stand-alone power systems based on renewable energy sources are widely used for energy generation in remote locations and for distributed generation in urban environments. The DC bus is an essential component of these systems since it enables power transmission between the sources, loads and batteries. The batteries are interfaced with the bus using a charger/discharger DC/DC converter, which is controlled to regulate the DC bus voltage under any operating conditions. This is an important task because unsafe over-voltages and under-voltages in the bus could damage the sources, loads and power converters. This paper proposes a sliding-mode controller for a charger/discharger DC/DC converter with improved disturbance rejection to provide a tight bus voltage regulation for safe operation. The main novelty of this solution is the inclusion of the bus current in the sliding surface, which accelerates the controller response. Moreover, a formal proof of the system global stability is provided, and a detailed process is developed to calculate the controller and implementation parameters. Finally, the proposed solution is validated through simulations and experiments. View Full-Text
Keywords: battery charger/discharger; bidirectional converter; sliding-mode controller; DC bus battery charger/discharger; bidirectional converter; sliding-mode controller; DC bus
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Serna-Garcés, S.I.; González Montoya, D.; Ramos-Paja, C.A. Control of a Charger/Discharger DC/DC Converter with Improved Disturbance Rejection for Bus Regulation. Energies 2018, 11, 594.

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