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Reduced-Order DC Terminal Dynamic Model for Multi-Port AC-DC Power Electronic Transformer

Author

Listed:
  • Zhe Wang

    (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering Chinese Academy of Sciences, Haidian District, Beijing 100190, China
    University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China)

  • Yaohua Li

    (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering Chinese Academy of Sciences, Haidian District, Beijing 100190, China
    University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China)

  • Zixin Li

    (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering Chinese Academy of Sciences, Haidian District, Beijing 100190, China
    University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China)

  • Cong Zhao

    (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering Chinese Academy of Sciences, Haidian District, Beijing 100190, China
    University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China)

  • Fanqiang Gao

    (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering Chinese Academy of Sciences, Haidian District, Beijing 100190, China
    University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China)

  • Ping Wang

    (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering Chinese Academy of Sciences, Haidian District, Beijing 100190, China
    University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China)

Abstract

As new electric power conversion equipment, a multi-port power electronic transformer (MP-PET), including a power electronic converter, high-frequency transformer, and multiple ac or dc interconnection interfaces, has a broad application in the hybrid distribution network. However, high integration and a large number of energy storage devices has led to very a high-order model of the system. To address this issue, a reduced-order small signal model of MP-PET is established in this paper. By taking the participation factors of the system mode to the state variables, the reduced-order model is derived based on the state variables, which are highly correlated with the dc voltage dominant mode. Compared with the full-order model, the proposed reduced-order model is accurate enough and simplified, and the validity of the simplified model is verified against simulations on a 10 kV/3 MVA MP-PET. The simulation results indicate that the proposed reduced-order model coincides well with the dynamic performance of the MP-PET.

Suggested Citation

  • Zhe Wang & Yaohua Li & Zixin Li & Cong Zhao & Fanqiang Gao & Ping Wang, 2019. "Reduced-Order DC Terminal Dynamic Model for Multi-Port AC-DC Power Electronic Transformer," Energies, MDPI, vol. 12(11), pages 1-16, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:11:p:2130-:d:236922
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