Emergency Power Supply Restoration Strategy of Distribution Network Considering Operational Risk of Islanded Microgrid

Zuo, Juan; Xu, Chongxin; Wang, Wenbo; Ai, Qian; Luo, Yihui

doi:10.3390/pr14030480

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Open AccessArticle

Emergency Power Supply Restoration Strategy of Distribution Network Considering Operational Risk of Islanded Microgrid

by

Juan Zuo

^1,2,

Chongxin Xu

²,

Wenbo Wang

²,

Qian Ai

¹

and

Yihui Luo

^3,*

¹

School of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

²

State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 201203, China

³

School of Electrical Engineering, Southeast University, Nanjing 210096, China

^*

Author to whom correspondence should be addressed.

Processes 2026, 14(3), 480; https://doi.org/10.3390/pr14030480

Submission received: 12 December 2025 / Revised: 19 January 2026 / Accepted: 26 January 2026 / Published: 29 January 2026

(This article belongs to the Special Issue AI-Driven Optimization in Intelligent Process Control for Power and Energy Systems)

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Abstract

This paper proposes an emergency power supply restoration strategy for a distribution network that considers the operational risk of an islanded microgrid in response to the issues of voltage exceeding limits and power imbalance faced during their operation. Firstly, a distribution network emergency power supply restoration model supported by a generalized dynamic islanded microgrid is constructed. By equating the alternate tie line with a virtual distributed generator (DG), the integrated power supply restoration problem of distribution network is transformed into a generalized island power distribution network division problem based on DGs. Then, the risk of islanded microgrid operation is considered and restricted by chance constraints. Finally, simulation results based on the improved IEEE-33 node distribution network show that, compared to the generalized island partitioning strategy which ignores operational risks, the proposed strategy increases the power supply restoration rate from 83.4% to 97.8% while successfully ensuring the stability of all islanded microgrids under the specified confidence level for operational risk.

Keywords: microgrid; islanded microgrid operation risk; generalized dynamic island; distribution network; chance constraint; emergency power supply restoration

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MDPI and ACS Style

Zuo, J.; Xu, C.; Wang, W.; Ai, Q.; Luo, Y. Emergency Power Supply Restoration Strategy of Distribution Network Considering Operational Risk of Islanded Microgrid. Processes 2026, 14, 480. https://doi.org/10.3390/pr14030480

AMA Style

Zuo J, Xu C, Wang W, Ai Q, Luo Y. Emergency Power Supply Restoration Strategy of Distribution Network Considering Operational Risk of Islanded Microgrid. Processes. 2026; 14(3):480. https://doi.org/10.3390/pr14030480

Chicago/Turabian Style

Zuo, Juan, Chongxin Xu, Wenbo Wang, Qian Ai, and Yihui Luo. 2026. "Emergency Power Supply Restoration Strategy of Distribution Network Considering Operational Risk of Islanded Microgrid" Processes 14, no. 3: 480. https://doi.org/10.3390/pr14030480

APA Style

Zuo, J., Xu, C., Wang, W., Ai, Q., & Luo, Y. (2026). Emergency Power Supply Restoration Strategy of Distribution Network Considering Operational Risk of Islanded Microgrid. Processes, 14(3), 480. https://doi.org/10.3390/pr14030480

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Emergency Power Supply Restoration Strategy of Distribution Network Considering Operational Risk of Islanded Microgrid

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