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A DAB Converter with Common-Point-Connected Winding Transformers Suitable for a Single-Phase 5-Level SST System

Author

Listed:
  • Hyeok-Jin Yun

    (Department of Electrical Engineering, Pusan National University, Busan 46241, Korea
    Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea)

  • Ho-Sung Kim

    (Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea)

  • Myoungho Kim

    (Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea)

  • Ju-Won Baek

    (Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea)

  • Hee-Je Kim

    (Department of Electrical Engineering, Pusan National University, Busan 46241, Korea)

Abstract

One of the main disadvantages of the multi-level solid-state transformer (SST) system is the voltage imbalance on the output of the rectifier modules. This voltage imbalance can be caused by parameter mismatch of the active and passive components, different loads, and the floating structure of the high voltage DC-links. Some studies have been done to solve this voltage imbalance problem. A common way to avoid this imbalance is to balance the voltage of DC-links at the AC/DC conversion stage and balance the power between the modules at the DC/DC conversion stage. Most of these methods require a complex balancing controller or additional circuits. This paper proposes a novel dual active bridge (DAB) converter specialized in power balancing in a single-phase 5-level SST system. The proposed DAB converter does not require any additional balancing controllers or techniques for power balancing. The performance of the proposed DAB converter was verified by simulation and experiments using a 3 kW 5-level SST prototype system.

Suggested Citation

  • Hyeok-Jin Yun & Ho-Sung Kim & Myoungho Kim & Ju-Won Baek & Hee-Je Kim, 2018. "A DAB Converter with Common-Point-Connected Winding Transformers Suitable for a Single-Phase 5-Level SST System," Energies, MDPI, vol. 11(4), pages 1-16, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:928-:d:141016
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    Citations

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    Cited by:

    1. Rui Wang & Qiuye Sun & Qifu Cheng & Dazhong Ma, 2018. "The Stability Analysis of a Multi-Port Single-Phase Solid-State Transformer in the Electromagnetic Timescale," Energies, MDPI, vol. 11(9), pages 1-22, August.
    2. Stefano Farnesi & Mario Marchesoni & Massimiliano Passalacqua & Luis Vaccaro, 2019. "Solid-State Transformers in Locomotives Fed through AC Lines: A Review and Future Developments," Energies, MDPI, vol. 12(24), pages 1-29, December.
    3. Min-Soo Kim & Do-Hyun Kim & Dong-Keun Jeong & Jang-Mok Kim & Hee-Je Kim, 2020. "Soft Start-Up Control Strategy for Dual Active Bridge Converter with a Supercapacitor," Energies, MDPI, vol. 13(16), pages 1-19, August.

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