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Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network

Author

Listed:
  • Zhenshan Zhu

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Dichen Liu

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Qingfen Liao

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Fei Tang

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Jun Jason Zhang

    (Department of Electrical and Computer Engineering, University of Denver, Denver, CO 80210, USA)

  • Huaiguang Jiang

    (National Renewable Energy Laboratory, Golden, CO 80401, USA)

Abstract

With the great increase of renewable generation as well as the DC loads in the distribution network; DC distribution technology is receiving more attention; since the DC distribution network can improve operating efficiency and power quality by reducing the energy conversion stages. This paper presents a new architecture for the medium voltage AC/DC hybrid distribution network; where the AC and DC subgrids are looped by normally closed AC soft open point (ACSOP) and DC soft open point (DCSOP); respectively. The proposed AC/DC hybrid distribution systems contain renewable generation (i.e., wind power and photovoltaic (PV) generation); energy storage systems (ESSs); soft open points (SOPs); and both AC and DC flexible demands. An energy management strategy for the hybrid system is presented based on the dynamic optimal power flow (DOPF) method. The main objective of the proposed power scheduling strategy is to minimize the operating cost and reduce the curtailment of renewable generation while meeting operational and technical constraints. The proposed approach is verified in five scenarios. The five scenarios are classified as pure AC system; hybrid AC/DC system; hybrid system with interlinking converter; hybrid system with DC flexible demand; and hybrid system with SOPs. Results show that the proposed scheduling method can successfully dispatch the controllable elements; and that the presented architecture for the AC/DC hybrid distribution system is beneficial for reducing operating cost and renewable generation curtailment.

Suggested Citation

  • Zhenshan Zhu & Dichen Liu & Qingfen Liao & Fei Tang & Jun Jason Zhang & Huaiguang Jiang, 2018. "Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network," Sustainability, MDPI, vol. 10(2), pages 1-22, January.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:2:p:318-:d:128839
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    References listed on IDEAS

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    Cited by:

    1. Zhichun Yang & Fan Yang & Huaidong Min & Yu Shen & Xu Tang & Yun Hong & Liang Qin, 2023. "A Local Control Strategy for Voltage Fluctuation Suppression in a Flexible Interconnected Distribution Station Area Based on Soft Open Point," Sustainability, MDPI, vol. 15(5), pages 1-13, March.
    2. Li, Xiangke & Dong, Chaoyu & Jiang, Wentao & Wu, Xiaohua, 2021. "An improved coordination control for a novel hybrid AC/DC microgrid architecture with combined energy storage system," Applied Energy, Elsevier, vol. 292(C).

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