Sliding-Mode Control of a Charger/Discharger DC/DC Converter for DC-Bus Regulation in Renewable Power Systems

Sergio Ignacio Serna-Garcés, Daniel Gonzalez Montoya and Carlos Andres Ramos-Paja
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Sergio Ignacio Serna-Garcés: Departamento de Electrónica y Telecomunicaciones, Instituto Tecnológico Metropolitano, Carrera 31 No. 54-10, Medellín, Colombia
Daniel Gonzalez Montoya: Departamento de Electrónica y Telecomunicaciones, Instituto Tecnológico Metropolitano, Carrera 31 No. 54-10, Medellín, Colombia
Carlos Andres Ramos-Paja: Departamento de Energia Eléctrica y Automática, Universidad Nacional de Colombia, Carrera 80 No. 65-223-Facultad de Minas, Medellín, Colombia

Energies, 2016, vol. 9, issue 4, 1-27

Abstract: Stand-alone power systems based on renewable energy sources are used to replace generators based on fossil fuels. Those renewable power systems also require Energy Storage Devices (ESD) interfaced by a charger/discharger power converter, which consist of a bidirectional DC/DC converter, and a DC bus. This paper proposes a single sliding-mode controller (SMC) for the charger/discharger DC/DC converter to provide a stable DC bus voltage in any operation condition: charging or discharging the ESD, or even without any power exchange between the ESD and the DC bus. Due to the non-linear nature of the power converter, the SMC parameters are adapted on-line to ensure global stability in any operation condition. Such stability of the adaptive SMC is mathematically demonstrated using analytical expressions for the transversality, reachability and equivalent control conditions. Moreover, a design procedure for the adaptive SMC parameters is provided in order to ensure the dynamic response required for the correct operation of the load. Finally, simulations and experimental tests validate the proposed controller and design procedure.

Keywords: sliding-mode controller; adaptive controller; bidirectional DC/DC converter; underdamped response; critically damped response; energy storage device (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: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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