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Consensus-Based Coordinated Control of Flexible Interconnected DC Microgrid Clusters

Author

Listed:
  • Dandan Qin

    (State Grid Anhui Electric Power Company, Hefei 230061, China)

  • Chao Wang

    (State Grid Anhui Wuhu Power Supply Company, Wuhu 241027, China)

  • Yuliang Liu

    (State Grid Anhui Wuhu Power Supply Company, Wuhu 241027, China)

  • Rundong Wu

    (State Grid Anhui Electric Power Company, Hefei 230061, China)

  • Dengshan Hou

    (State Grid Anhui Fuyang Power Supply Company, Fuyang 236000, China)

  • Weijian Huang

    (College of Information Engineering, Nanchang Hangkong University, Nanchang 330063, China)

  • Liangliang Chen

    (College of Information Engineering, Nanchang Hangkong University, Nanchang 330063, China)

Abstract

This paper proposes a consensus–coordinated control strategy to improve the stability and reliability of interconnected direct current (DC) microgrid cluster systems based on isolated bidirectional DC–DC converters. Compared with the traditional communication-based control strategy, the proposed method does not require an additional communication system. The proposed method is only based on local measurement information, making the whole cluster form an organic unit. No matter where the power disturbance occurs in the continuous-flow microgrid, all the balance units in the system can be linked to provide emergency power support for the disturbed microgrid, improve the dynamic characteristics of the DC voltage of the disturbed microgrid, and reduce the steady-state deviation of the DC voltage of the disturbed grid. The disturbance power is reasonably borne by the balance unit of the whole system according to its equivalent power distribution coefficient ratio. Finally, the effectiveness of the proposed control strategy is verified through the PSCAD/EMTDC simulation.

Suggested Citation

  • Dandan Qin & Chao Wang & Yuliang Liu & Rundong Wu & Dengshan Hou & Weijian Huang & Liangliang Chen, 2023. "Consensus-Based Coordinated Control of Flexible Interconnected DC Microgrid Clusters," Energies, MDPI, vol. 17(1), pages 1-17, December.
    • Handle: RePEc:gam:jeners:v:17:y:2023:i:1:p:43-:d:1304586
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