High-Efficiency Partial Power Converter for Integration of Second-Life Battery Energy Storage Systems in DC Microgrids

This article presents a power electronic interface for battery energy storage integration into a dc microgrid. It is based on a partial power converter (PPC) employing a current-fed dc-dc topology. The article provides an analysis of application requirements and proposes an optimal second-life batte...

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Bibliographic Details
Published in:IEEE open journal of the Industrial Electronics Society 2024, Vol.5, p.847-860
Main Authors: Hassanpour, Naser, Chub, Andrii, Yadav, Neelesh, Blinov, Andrei, Vinnikov, Dmitri
Format: Article
Language:English
Subjects:
Batteries
Battery energy storage system
Battery energy storage system (BESS)
Capacitors
control
dc microgrid
DC-DC power converters
dc–dc converter
Degradation
Distributed generation
Electric potential
Energy conversion efficiency
Energy storage
Lithium
Microgrids
Morphing
partial power converter (PPC)
Power conversion
Power converters
Storage systems
Technology assessment
Topology
Voltage
Voltage control
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Summary:This article presents a power electronic interface for battery energy storage integration into a dc microgrid. It is based on a partial power converter (PPC) employing a current-fed dc-dc topology. The article provides an analysis of application requirements and proposes an optimal second-life battery stack configuration to leverage all the benefits of the PPC technology. This converter can regulate current at zero series voltage between a battery stack and a dc microgrid using the topology morphing control. The article shows how the converter and its control system should be designed to operate in a droop-controlled dc microgrid. The experimental results demonstrate the converter's capability to operate under droop control, implementing both voltage step-up and -down regulation with a smooth transition between converter modes. The experimental efficiency reaches as high as 99.45%, demonstrating an efficient approach for second-life battery energy storage integration into dc microgrid.
ISSN:2644-1284
2644-1284
DOI:10.1109/OJIES.2024.3389466