Adaptive Controller for Bus Voltage Regulation on a DC Microgrid Using a Sepic/Zeta Battery Charger/Discharger

Jhoan Alejandro Montenegro-Oviedo, Carlos Andres Ramos-Paja, Martha Lucia Orozco-Gutierrez (), Edinson Franco-Mejía and Sergio Ignacio Serna-Garcés
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Jhoan Alejandro Montenegro-Oviedo: Escuela de Ingeniería Eléctrica y Electrónica, Universidad del Valle de Colombia, Cali 760042, Colombia
Carlos Andres Ramos-Paja: Facultad de Minas, Universidad Nacional de Colombia, Medellin 050041, Colombia
Martha Lucia Orozco-Gutierrez: Escuela de Ingeniería Eléctrica y Electrónica, Universidad del Valle de Colombia, Cali 760042, Colombia
Edinson Franco-Mejía: Escuela de Ingeniería Eléctrica y Electrónica, Universidad del Valle de Colombia, Cali 760042, Colombia
Sergio Ignacio Serna-Garcés: Departamento de Electrónica y Telecomunicaciones, Instituto Tecnológico Metropolitano, Medellin 050013, Colombia

Mathematics, 2023, vol. 11, issue 4, 1-30

Abstract: In a DC microgrid that involves a battery storage system, the primary energy management is performed by a battery charger/discharger based on a dc/dc power converter. Moreover, the battery charger/discharger is also used to regulate the voltage of the dc bus. One of the challenges at the control level is to regulate the DC bus voltage under battery charge and discharge conditions but also under different relations between the battery and bus voltages. For this reason, this paper proposes a battery charger/discharger based on the Sepic/Zeta converter and an adaptive controller, which provides bidirectional current flow, stable bus voltage, and satisfactory electrical characteristics. The main advantage of the proposed control system is the capability to adapt the controller parameters to any operation condition, which provides a general solution to interface any battery to any bus voltage. This study is focused on the design procedure of both the power converter and the controller, where a detailed mathematical analysis is performed to ensure the system performance and stability. Finally, the proposed solution is validated using an experimental prototype and a practical application case.

Keywords: microgrid; Sepic/Zeta converter; battery charger/discharger; DC bus regulation; adaptive controller (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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