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Volume 18
Issue 19
10.3390/en18195131
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

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

by
Xingning Han
1,
Ying Huang
2,*,
Guoteng Wang
2,
Hui Cai
1,
Mingxin Yan
2 and
Zheng Xu
2
1
Economic Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210008, China
2
College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
*
Author to whom correspondence should be addressed.
Energies 2025, 18(19), 5131; https://doi.org/10.3390/en18195131
Submission received: 4 September 2025 / Revised: 22 September 2025 / Accepted: 23 September 2025 / Published: 26 September 2025
(This article belongs to the Special Issue Advanced Grid Integration with Power Electronics: 2nd Edition)
Versions Notes

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.
Keywords: single-AC multi-DC; AC/DC hybrid grid; operational characteristics; construction principles single-AC multi-DC; AC/DC hybrid grid; operational characteristics; construction principles

Share and Cite

MDPI and ACS Style

Han, X.; Huang, Y.; Wang, G.; Cai, H.; Yan, M.; Xu, Z. Coupling Characteristics and Construction Method of Single-AC Multi-DC Hybrid Grid. Energies 2025, 18, 5131. https://doi.org/10.3390/en18195131

AMA Style

Han X, Huang Y, Wang G, Cai H, Yan M, Xu Z. Coupling Characteristics and Construction Method of Single-AC Multi-DC Hybrid Grid. Energies. 2025; 18(19):5131. https://doi.org/10.3390/en18195131

Chicago/Turabian Style

Han, Xingning, Ying Huang, Guoteng Wang, Hui Cai, Mingxin Yan, and Zheng Xu. 2025. "Coupling Characteristics and Construction Method of Single-AC Multi-DC Hybrid Grid" Energies 18, no. 19: 5131. https://doi.org/10.3390/en18195131

APA Style

Han, X., Huang, Y., Wang, G., Cai, H., Yan, M., & Xu, Z. (2025). Coupling Characteristics and Construction Method of Single-AC Multi-DC Hybrid Grid. Energies, 18(19), 5131. https://doi.org/10.3390/en18195131

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