Islanding Strategy for Smart Grids Oriented to Resilience Enhancement and Its Power Supply Range Optimization

TL;DR

This paper proposes a novel islanding partitioning method for smart grids that enhances resilience and optimizes power supply range using mathematical modeling, reachability analysis, and dynamic programming techniques.

Contribution

It introduces a new mathematical model and an efficient algorithm for islanding division that improves system resilience and power supply optimization in smart grids.

Findings

The proposed algorithm effectively improves smart grid resilience.

Simulation results confirm the efficiency of the islanding partitioning method.

The method optimizes the maximum power supply range considering controllable loads.

Abstract

With the increasing prevalence of distributed generators, islanded operation based on distributed generation is considered a vital means to enhance the reliability and resilience of smart grids. This paper investigates the main factors in islanding partition of smart grids and establishes a mathematical model for islanding division. A method to determine the maximum power supply range of distributed energy resources (DERs) based on the reachability matrix and power circle algorithm is proposed to improve computational efficiency. A dynamic programming method based on breadth-first search (BFS) is used to solve the islanding partition scheme, and a region correction method is applied to modify the maximum power supply area by considering controllable loads and prioritizing critical load restoration, thereby enhancing system resilience. Finally, simulation results verify the effectiveness of the proposed algorithm in improving smart grid resilience.