Systematic Topological Assessment of Power System for Restoration Process Based on the Fractal Dimension

Despite the extensive studies that have been done regarding the restoration problems and issues of power systems, the impact of the topological extent of the power grid structure on power system restoration has not been analyzed or assessed. This objective, which is neglected in the process of planning and development of transmission systems, could make operators encounter more challenges during the restoration process and prolongation of the restoration procedures. In this study, an attempt is made to evaluate the desirability of a power system network structure according to the main requirement of the restoration process, i.e. restoration time. To address this concern, a systematic approach on the basis of a fractal-based quantitative index is introduced to measure the topological extent of a power system network as a representative of restoration time. The proposed approach combines the feeding point condition, topological extent, and support routes to deliver an index associated with the time and success probability of the power system restoration process.