Open Access

ARTICLE

The Method of Distribution-Microgrid Collaborative Fault Recovery Considering Network Dynamic Reconfiguration

Song Gao¹, Jiarui Wang², Yu Zhang¹, Ling Jiang^3,*
1 Grid Technology Center, State Grid Jilin Electric Power Research Institute, Changchun, 130021, China
2 Science and Technology Innovation Department, State Grid Jilin Electric Power Research Institute, Changchun, 130021, China
3 School of Electrical and Power Engineering, Hohai University, Nanjing, 211100, China
* Corresponding Author: Ling Jiang. Email:

Energy Engineering https://doi.org/10.32604/ee.2026.076467

Received 21 November 2025; Accepted 04 January 2026; Published online 11 March 2026

Abstract

This paper proposes a cooperative fault recovery method for distribution networks and microgrids considering dynamic network reconfiguration. First, an optimization model is constructed with the objectives of minimizing electricity purchase costs, voltage deviations, network losses, load shedding, and microgrid operation costs. The model thoroughly considers operational conditions, including power flow constraints, security operation constraints, and network reconfiguration constraints, within the distribution network. Second, to address the privacy protection requirements of distributed energy resources (DERs) in microgrids, a k-order approximation method is employed to establish an operation feasible region (OFR) model for microgrid operational flexibility resources. This model characterizes the operational characteristics of microgrids through power and energy boundary constraints. Finally, to solve the cooperative optimization problem between the distribution network and microgrids, a non-iterative solution method based on equivalent projection is proposed. This method decomposes the original problem into a distribution network-level optimization and microgrid-level subproblems, eliminating internal variables through equivalent projection technology to achieve cooperative optimization under privacy protection. Simulation results demonstrate that the proposed method can effectively achieve cooperative optimization of distribution network fault recovery and microgrid scheduling while protecting microgrid privacy information, significantly improving the economy and reliability of distribution network fault recovery.

---

Keywords

Network reconfiguration; fault recovery; distribution-microgrid coordination; operational feasible region; equivalent projection

---