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New breed of solid-state transformer mainly combing hybrid cascaded multilevel converter with resonant DC-DC converters

Author

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  • Liu, Chuang
  • Li, Xuejiao
  • Zhi, Yuemei
  • Cai, Guowei

Abstract

This paper proposes a new breed of solid-state transformer (SST) distribution tail system mainly based on hybrid cascaded multilevel converter and resonant DC-DC converters between medium-voltage distribution and low-voltage customer side. The proposed SST topology mainly combines per-phase cascaded H-bridge converters based on the DC transformers (DCTs) with the square-wave two-level VSC based on the assembled DCT together. The proposed system can offer the operational flexibility for active and reactive power control for medium-voltage side based on the simplified single-stage control system structure concept thanks to the characteristics of the resonant DC-DC converters working under the quasi-resonant mode. Additionally, compared to the existing SST systems, it offers better features such as smaller space volume, simpler control system, lower unit cost, etc. To illustrate the feasibility of the proposed SST distribution tail system, this paper assesses its dynamic performance during steady-state and network alterations, including its response to medium-voltage ac-side unbalance.

Suggested Citation

  • Liu, Chuang & Li, Xuejiao & Zhi, Yuemei & Cai, Guowei, 2018. "New breed of solid-state transformer mainly combing hybrid cascaded multilevel converter with resonant DC-DC converters," Applied Energy, Elsevier, vol. 210(C), pages 724-736.
    • Handle: RePEc:eee:appene:v:210:y:2018:i:c:p:724-736
    DOI: 10.1016/j.apenergy.2017.08.052
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    Cited by:

    1. Bouzid, Allal El Moubarek & Chaoui, Hicham & Zerrougui, Mohamed & Ben Elghali, Seifeddine & Benbouzid, Mohamed, 2021. "Robust control based on linear matrix inequalities criterion of single phase distributed electrical energy systems operating in islanded and grid-connected modes," Applied Energy, Elsevier, vol. 292(C).
    2. Vavilapalli, Sridhar & Umashankar, S. & Sanjeevikumar, P. & Ramachandaramurthy, Vigna K. & Mihet-Popa, Lucian & Fedák, Viliam, 2018. "Three-stage control architecture for cascaded H-Bridge inverters in large-scale PV systems – Real time simulation validation," Applied Energy, Elsevier, vol. 229(C), pages 1111-1127.
    3. Emad Roshandel & Amin Mahmoudi & Solmaz Kahourzade & Hamid Davazdah-Emami, 2022. "DC-DC High-Step-Up Quasi-Resonant Converter to Drive Acoustic Transmitters," Energies, MDPI, vol. 15(15), pages 1-20, August.
    4. Xiao, Qian & Mu, Yunfei & Jia, Hongjie & Jin, Yu & Yu, Xiaodan & Teodorescu, Remus & Guerrero, Josep M., 2022. "Novel modular multilevel converter-based five-terminal MV/LV hybrid AC/DC microgrids with improved operation capability under unbalanced power distribution," Applied Energy, Elsevier, vol. 306(PB).

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