A Modular SiC High-Frequency Solid-State Transformer for Medium-Voltage Applications: Design, Implementation, and Testing
Open accessAbstract
The advancements in wide-bandgap devices are enabling applications of power electronic converters coupled directly with medium-voltage (MV) grids that incorporate galvanic isolation within the converter using high-frequency solid-state transformers (SSTs). This paper presents analysis, design, and the characterization results of a 50-kVA modular soft-switched ac-ac SST using silicon carbide (SiC) MOSFET for MV (>6 kV ac) applications. The SST is comprised of two hard-switched ac-line interface bridges and a resonant dc-dc stage switched at approximately 180 kHz. To minimize the cost of switching elements per ampere and maximize the design flexibility, the design uses multiple discrete SiC devices of, readily available, 1700-V ratings. This paper covers the analysis of soft-switching operation, control architecture, converter design, and system-level integration.
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- Authors
- Dong, D., Agamy, M., Bebic, J. Z., Chen, Q., & Mandrusiak, G.
- Affiliations
- General Electric (United States) (US)
- Applied Materials (United States) (US)
- Venue
- IEEE Journal of Emerging and Selected Topics in Power Electronics
- Published
- 2019-06
- Volume
- 7
- Issue
- 2
- Pages
- 768-778
- ISSN
- 2168-6777 (ISSN-L)
- 2168-6785
- OpenAlex
- W2912474914
- Cited by
- 154
- References
- 23
- Citations by year
- 2026: 9 · 2025: 20 · 2024: 30 · 2023: 31 · 2022: 19 · 2021: 23 · 2020: 17 · 2019: 5
- FWCI
- 5.75
- Type
- journal article
- Language
- en
- Open access
- green
- www.osti.gov
- Licence
- Locations
- IEEE Journal of Emerging and Selected Topics in Power Electronics (publishedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- Funders
- U.S. Department of Energy (DE-EE0007252)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced DC-DC Converters
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Multilevel Inverters and Converters
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Silicon Carbide Semiconductor Technologies
- Keywords
- solid-state transformer, SiC MOSFET, medium-voltage distribution networks, soft switching, AC-AC converter, galvanic isolation, modular converter, wide bandgap devices, system integration
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