Bidirectional Charging for BEVs with Reconfigurable Battery Systems via a Grid-Parallel Proportional-Resonant Controller

This paper investigates the potential of bidirectional charging using modular multilevel inverter-based reconfigurable battery systems via grid-parallel control. The system offers several advantages such as modularity, scalability, and fault-tolerance over conventional battery electric vehicle syste...

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Bibliographic Details
Published in:Electricity (Basel, Switzerland) Switzerland), 2023-06, Vol.4 (2), p.171-184
Main Authors: Buberger, Johannes, Hohenegger, Michael, Estaller, Julian, Wiedenmann, Andreas, Grupp, Wolfgang, Bliemetsrieder, Wolfgang, Kuder, Manuel, Lesnicar, Anton, Weyh, Thomas
Format: Article
Language:English
Subjects:
Aging
battery electric vehicle
bidirectional charging
Electric power
Electric vehicles
Electricity distribution
Energy storage
measurement setup
multilevel inverter
proportional resonant controller
reconfigurable battery
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Summary:This paper investigates the potential of bidirectional charging using modular multilevel inverter-based reconfigurable battery systems via grid-parallel control. The system offers several advantages such as modularity, scalability, and fault-tolerance over conventional battery electric vehicle systems. It is designed for seamless integration with the grid, allowing bidirectional power flow and efficient energy storage. Within this study, the battery system is first simulated in Matlab/Simulink and later implemented into a hardware setup. Eventually, the simulation results and the measurements have been compared and evaluated. Thereby, startup sequences and constant current scenarios were investigated. It has been shown that the system is fully capable to charge and discharge the batteries in the grid-parallel connection, thus enabling bidirectional charging with close to full drive system power. The current total harmonic distortion complies with grid regulations and can potentially improve the grid quality. The proposed system offers significant potential for grid-integrated energy storage systems, addressing the challenges associated with renewable energy integration, grid stability, and energy management. In comparison to other publications on this topic, the proposed approach does not need additional dedicated power electronic hardware and has more degrees of freedom for current control.
ISSN:2673-4826
2673-4826
DOI:10.3390/electricity4020011