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Island DC Microgrid Hierarchical Coordinated Multi-Mode Control Strategy

Author

Listed:
  • Zhongbin Zhao

    (School of Electrical Engineering, Guizhou University, Guiyang 550025, China)

  • Jing Zhang

    (School of Electrical Engineering, Guizhou University, Guiyang 550025, China)

  • Yu He

    (School of Electrical Engineering, Guizhou University, Guiyang 550025, China)

  • Ying Zhang

    (Guizhou Power Grid Company, Guiyang 550001, China)

Abstract

As renewable energy sources connecting to power systems continue to improve and new-type loads, such as electric vehicles, grow rapidly, direct current (DC) microgrids are attracting great attention in distribution networks. In order to satisfy the voltage stability requirements of island DC microgrids, the problem of inaccurate load power dispatch caused by line resistance must be solved and the defects of centralized communication and control must be overcome. A hierarchical, coordinated, multiple-mode control strategy based on the switch of different operation modes is proposed in this paper and a three-layer control structure is designed for the control strategy. Based on conventional droop control, a current-sharing layer and a multi-mode switching layer are used to ensure the stable operation of the DC microgrid. Accurate load power dispatch is satisfied using a difference discrete consensus algorithm. Furthermore, virtual bus voltage information is applied to guarantee smooth switching between various modes, which safeguards voltage stability. Simulation verification is carried out for the proposed control strategy by power systems computer aided design/electromagnetic transients including DC (PSCAD/EMTDC). The results indicate that the proposed control strategy guarantees the voltage stability of island DC microgrids and accurate load power dispatch under different operation modes.

Suggested Citation

  • Zhongbin Zhao & Jing Zhang & Yu He & Ying Zhang, 2019. "Island DC Microgrid Hierarchical Coordinated Multi-Mode Control Strategy," Energies, MDPI, vol. 12(15), pages 1-20, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:15:p:3012-:d:254839
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    References listed on IDEAS

    as
    1. Mengelkamp, Esther & Gärttner, Johannes & Rock, Kerstin & Kessler, Scott & Orsini, Lawrence & Weinhardt, Christof, 2018. "Designing microgrid energy markets," Applied Energy, Elsevier, vol. 210(C), pages 870-880.
    2. Shuai, Zhikang & Fang, Junbin & Ning, Fenggen & Shen, Z. John, 2018. "Hierarchical structure and bus voltage control of DC microgrid," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3670-3682.
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    Cited by:

    1. Alfredo Padilla-Medina & Francisco Perez-Pinal & Alonso Jimenez-Garibay & Antonio Vazquez-Lopez & Juan Martinez-Nolasco, 2020. "Design and Implementation of an Energy-Management System for a Grid-Connected Residential DC Microgrid," Energies, MDPI, vol. 13(16), pages 1-30, August.
    2. Miloud Rezkallah & Sanjeev Singh & Ambrish Chandra & Bhim Singh & Hussein Ibrahim, 2020. "Off-Grid System Configurations for Coordinated Control of Renewable Energy Sources," Energies, MDPI, vol. 13(18), pages 1-25, September.
    3. Zhiming Zhang & Qing Chen & Ranran Xie & Yi Zheng, 2019. "A Protection System for Improved Ring-Bus DC Microgrids," Energies, MDPI, vol. 12(19), pages 1-14, October.
    4. Villanueva-Rosario, Junior Alexis & Santos-García, Félix & Aybar-Mejía, Miguel Euclides & Mendoza-Araya, Patricio & Molina-García, Angel, 2022. "Coordinated ancillary services, market participation and communication of multi-microgrids: A review," Applied Energy, Elsevier, vol. 308(C).

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