Overview of Bidirectional Unfolding Converters for Battery Energy Storage Systems
2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2022): Proceedings 2022
Aleksandrs Bubovičs, Maksims Vorobjovs, Iļja Galkins, Andrei Blinov, Andreas Giannakis

In order to support wider use of distributed renewable sources and mitigate the negative effects of their intermittent behavior, nowadays they are often installed together with energy storages, located on-site or nearby. Battery energy storage systems (BESS) allow not only to match consumption and generation profiles more closely, but also they provide various ancillary grid-supporting services. The enabling technology for these emerging opportunities is related to power electronic interfaces between the DC battery and the AC grid. Generally, a two-stage power conversion approach is used, where the battery-side DC-DC stage is responsible for controlling the battery current and grid-side DC-AC stage controls the current taken or injected to the grid. These two stages are connected through a bulky DC-link capacitor with stabilized voltage. Such an approach has however reached its limits in terms of efficiency, power density and cost. Therefore, a lot of research is currently focused on alternative topologies, enabling higher performances than the well-developed two stages approach. One of the promising configurations of such alternative topology includes a DC-DC converter, that forms sine voltage half-waves and an unfolding circuit, which provides the commutation of these half-waves to the grid. This paper presents a review of unfolding converters in the context of BESS. Configurations of unfolding circuits with DC-DC choppers, dual active bridge converters and multilevel converters, as well as the partial power converters are analyzed.


Atslēgas vārdi
Converters, DC-AC converters, Energy storage, Renewable energy sources, DC-AC power converters, DC-DC power converters, multilevel converters
DOI
10.1109/PEDG54999.2022.9923093
Hipersaite
https://ieeexplore.ieee.org/document/9923093

Bubovičs, A., Vorobjovs, M., Galkins, I., Blinov, A., Giannakis, A. Overview of Bidirectional Unfolding Converters for Battery Energy Storage Systems. No: 2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2022): Proceedings, Vācija, Kiel, 26.-29. jūnijs, 2022. Piscataway: IEEE, 2022, 1.-7.lpp. ISBN 978-1-6654-6619-6. e-ISBN 978-1-6654-6618-9. ISSN 2329-5759. e-ISSN 2329-5767. Pieejams: doi:10.1109/PEDG54999.2022.9923093

Publikācijas valoda
English (en)
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