Robust Power Supply Restoration Method with Coordination of Main Grid and Distribution Networks Based on Reconstruction Level Identification

Most of the traditional power supply restoration strategies of the distribution network are divided into islands first and then dynamically reconstructed, which lacks the common consideration for both. However, the global reconstruction also has some problems such as poor economic efficiency and high operational difficulty. Therefore, a robust power supply restoration method with coordination of main grid and distribution networks based on reconstruction level identification is proposed. First, based on the fault situation of the distribution system, according to the principle of local autonomy and low-level priority reconstruction, the multilevel reconstruction requirements of the main grid (substation level) and distribution networks (distribution line level) are quickly determined. Then, islands are divided and reconstructed for different levels of regions. Next, in order to solve the problem that the convex hull polyhedron set describing the uncertainty of distributed photovoltaic output is conservative in the shrinking process, the hyperplane method is used to cut the convex hull set and an improved convex hull set model is established. Furthermore, the robust power supply restoration model of distribution network is constructed, and the column and constraint generation algorithm is used to solve the robust power supply restoration model. Finally, the simulation results of the improved 78-bus system show that the robust power supply restoration method with coordination of main grid and distribution networks based on reconstruction level identification can reduce conservatism and improve the robustness of power supply restoration results. © 2025 Automation of Electric Power Systems Press. All rights reserved.