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Optimal Scheduling Strategy of AC/DC Hybrid Distribution Network Based on Power Electronic Transformer

Author

Listed:
  • Qingwen Peng

    (State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Lu Qu

    (State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Zhichang Yuan

    (State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Xiaorui Wang

    (State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Yukun Chen

    (State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Baoye Tian

    (State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

Abstract

The AC/DC hybrid distribution network is composed of a medium-voltage DC bus, a low-voltage DC bus, and a power electronic transformer, and has the characteristics of multi-voltage level, multi-DC bus, and multi-converter, so its operation mode and optimal scheduling strategy are more complex. Firstly, this paper constructs the AC/DC hybrid distribution network using an power electronic transformer. Then, a two-layer control structure including a scheduling management layer and a bus control layer is proposed, which simplifies the control structure and gives full play to the role of “energy routing” function of the power electronic transformer. Moreover, the minimum operation cost of the AC/DC hybrid distribution network in the whole scheduling cycle is taken as the optimization objective, considering the characteristics of various distributed generations, the structure of AC/DC hybrid distribution network, and the interaction of “source–load–storage”. Finally, the optimal scheduling model of the AC/DC hybrid distribution network based on power electronic transformer is established, and the feasibility of the optimal scheduling strategy is verified by the open-source solver, which can realize the complete absorption of renewable energy and the optimal coordinated control of “source–load–storage”.

Suggested Citation

  • Qingwen Peng & Lu Qu & Zhichang Yuan & Xiaorui Wang & Yukun Chen & Baoye Tian, 2021. "Optimal Scheduling Strategy of AC/DC Hybrid Distribution Network Based on Power Electronic Transformer," Energies, MDPI, vol. 14(11), pages 1-20, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:11:p:3219-:d:566382
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    References listed on IDEAS

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    1. Chen, Xi & Wang, Chengfu & Wu, Qiuwei & Dong, Xiaoming & Yang, Ming & He, Suoying & Liang, Jun, 2020. "Optimal operation of integrated energy system considering dynamic heat-gas characteristics and uncertain wind power," Energy, Elsevier, vol. 198(C).
    2. Yao Liu & Jianfu Chen & Lu Qu & Zhanqing Yu & Zipan Nie & Rong Zeng, 2019. "Research on Access Mode of the Flexible DC Power Distribution System into AC System," Energies, MDPI, vol. 12(20), pages 1-15, October.
    3. Li, Peng & Wang, Zixuan & Wang, Jiahao & Yang, Weihong & Guo, Tianyu & Yin, Yunxing, 2021. "Two-stage optimal operation of integrated energy system considering multiple uncertainties and integrated demand response," Energy, Elsevier, vol. 225(C).
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