Bidirectional Power Sharing for DC Microgrid Enabled by Dual Active Bridge DC-DC Converter

Sara J. Ríos, Daniel J. Pagano and Kevin E. Lucas
Additional contact information
Sara J. Ríos: Faculty of Electrical and Computer Engineering, ESPOL Polytechnic University, Campus Gustavo Galindo, Guayaquil 09-01-5863, Ecuador
Daniel J. Pagano: Department of Automation and Systems, Federal University of Santa Catarina (UFSC), Florianópolis 88040-900, Brazil
Kevin E. Lucas: Faculty of Electrical and Computer Engineering, ESPOL Polytechnic University, Campus Gustavo Galindo, Guayaquil 09-01-5863, Ecuador

Energies, 2021, vol. 14, issue 2, 1-24

Abstract: Currently, high-performance power conversion requirements are of increasing interest in microgrid applications. In fact, isolated bidirectional dc-dc converters are widely used in modern dc distribution systems. The dual active bridge (DAB) dc-dc converter is identified as one of the most promising converter topology for the mentioned applications, due to its benefits of high power density, electrical isolation, bidirectional power flow, zero-voltage switching, and symmetrical structure. This study presents a power management control scheme in order to ensure the power balance of a dc microgrid in stand-alone operation, where the renewable energy source (RES) and the battery energy storage (BES) unit are interfaced by DAB converters. The power management algorithm, as introduced in this work, selects the proper operation of the RES system and BES system, based on load/generation power and state-of-charge of the battery conditions. Moreover, a nonlinear robust control strategy is proposed when the DAB converters are in voltage-mode-control in order to enhance the dynamic performance and robustness of the common dc-bus voltage, in addition to overcoming the instability problems that are caused by constant power loads and the dynamic interactions of power electronic converters. The simulation platform is developed in MATLAB/Simulink, where a photovoltaic system and battery system are selected as the typical RES and BES, respectively. Assessments on the performance of the proposed control scheme are conducted. Comparisons with the other control method are also provided.

Keywords: bidirectional power sharing; dc-dc converter; dc microgrid; dual active bridge (DAB); nonlinear control; robust control (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 complete reference list from CitEc
Citations: View citations in EconPapers (8)

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/2/404/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/2/404/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:2:p:404-:d:479278

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().