LAPSE:2023.35896
Published Article
LAPSE:2023.35896
An MV-Connected Ultra-Fast Charging Station Based on MMC and Dual Active Bridge with Multiple dc Buses
May 24, 2023
The diffusion of electric vehicles will be strongly related to the capacity to charge them in short times. To do so, the necessity of widespread fast charging stations arises. However, their intermittent demand represents a challenging load for grid operators. In order to relieve their impact on the electrical grid operation, integrating storage systems in the charging stations represents a potential solution, although it complicates the overall system management. Moreover, standard converter architectures for the MV grid interface require the installation of bulky transformers and filters. In order to cope with the mentioned problems, this paper proposes an ultra-fast charging station topology based on a modular multilevel converter (MMC) structure and dual-active bridge (DAB) converters. Thanks to the multilevel converter properties, the proposed charging station can be directly interfaced with the MV grid without requiring transformers or filters. Additionally, exploiting the degree of freedom in the converter control system, such as circulating components, offers uneven power distribution among the converter submodules that can be managed. Along with the MMC control strategy, the article addresses a straightforward methodology to select the main parameters of the DAB converter as a function of the involved grid power and circulating power contributions, with the primary goal of obtaining a trade-off between internal balancing performances and a broad soft-switching region without incurring in converter oversizing. The effectiveness of the proposed charging station is finally discussed through numerical simulations, where its behavior during a power demand cycle is analyzed.
Keywords
Batteries, dual-active bridge, electric vehicles, modular multilevel converter, storage systems, ultra-fast charging
Suggested Citation
Barresi M, Ferri E, Piegari L. An MV-Connected Ultra-Fast Charging Station Based on MMC and Dual Active Bridge with Multiple dc Buses. (2023). LAPSE:2023.35896
Author Affiliations
Barresi M: Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Italy [ORCID]
Ferri E: Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Italy [ORCID]
Piegari L: Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Italy [ORCID]
Journal Name
Energies
Volume
16
Issue
9
First Page
3960
Year
2023
Publication Date
2023-05-08
Published Version
ISSN
1996-1073
Version Comments
Original Submission
Other Meta
PII: en16093960, Publication Type: Journal Article
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LAPSE:2023.35896
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doi:10.3390/en16093960
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May 24, 2023
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CC BY 4.0
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May 24, 2023
 
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May 24, 2023
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Original Submitter
Calvin Tsay
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