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Coupling Characteristics and Construction Method of Single-AC Multi-DC Hybrid Grid

Author

Listed:
  • Xingning Han

    (Economic Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210008, China)

  • Ying Huang

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Guoteng Wang

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Hui Cai

    (Economic Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210008, China)

  • Mingxin Yan

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Zheng Xu

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

In regions with concentrated load centers in China, the AC transmission network is dense, leading to challenges such as difficulties in power flow control and excessive short-circuit currents. The scale effect of AC grids is approaching saturation, making it imperative to develop new AC/DC hybrid grid structures. To enhance the controllability, security, and stability of AC/DC hybrid power systems, a single-AC multi-DC hybrid grid structure is proposed in this paper. The operational characteristics of this grid are analyzed in terms of power flow control capability, N-1 overload, short-circuit current, frequency stability, voltage stability, and synchronous stability, and a method for constructing the single-AC multi-DC hybrid grid is presented. Finally, simulation analysis is conducted on a typical single-AC multi-DC case, and the results indicate that this hybrid grid structure can simultaneously satisfy the controllability, security, and stability requirements of AC/DC power systems, making it a highly promising grid configuration.

Suggested Citation

  • Xingning Han & Ying Huang & Guoteng Wang & Hui Cai & Mingxin Yan & Zheng Xu, 2025. "Coupling Characteristics and Construction Method of Single-AC Multi-DC Hybrid Grid," Energies, MDPI, vol. 18(19), pages 1-13, September.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:19:p:5131-:d:1759216
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