Comparison of modulations and dc-link balance control strategies for a multibattery charger system based on a three-level dual-active-bridge power converter,
Document typeConference report
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessOpen Access
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ProjectCONVERSION ELECTRONICA DE POTENCIA AVANZADA BASADA EN MATRICES DE CELDAS DE CONMUTACION (AEI-DPI2017-89153-P)
This paper focuses on the study of a charger for two batteries connected in series. From the three-phase grid, the batteries are charged through a three-level neutral-point-clamped (NPC) ac-dc converter in cascade with a three-level NPC dualactive-bridge converter. The system provides galvanic isolation and allows bidirectional power flow. A simple control strategy to charge the batteries is considered, based on the regulation of the common- and differential-mode components of the batteries charging currents. In addition, the proposed control system regulates the total dc-link voltage and the dc-link voltage balance in the two systems dc-links. This work is particularly focused on the comparison of the charger performance under two competitive ac-dc converter modulations, in terms of the ac-side voltage harmonic content, the number of switching transitions, the dc-link voltage balance, and the charging current control capacity. Simulation results with the performance comparison are provided and the merits and demerits of each option are highlighted.
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CitationCampos, J. [et al.]. Comparison of modulations and dc-link balance control strategies for a multibattery charger system based on a three-level dual-active-bridge power converter,. A: IEEE International Symposium on Industrial Electronics. "2022 IEEE 31st International Symposium on Industrial Electronics (ISIE): Anchorage, AK, USA: June 1-3, 2022: proceedings". Institute of Electrical and Electronics Engineers (IEEE), 2022, p. 366-373. DOI 10.1109/ISIE51582.2022.9831539.