A New Method for Solving Service Restoration Problem in Distribution Networks Considering Expected Switching Time

Asadi, Qasem; Falaghi, Hamid; Ashoornezhad, Ali; Ramezani, Maryam

doi:10.48308/ijrtei.2023.230316.1034

A New Method for Solving Service Restoration Problem in Distribution Networks Considering Expected Switching Time

Document Type : Research Article

Authors

Qasem Asadi

Hamid Falaghi

Ali Ashoornezhad

Maryam Ramezani

Faculty of Electrical and Computer Engineering, University of Birjand, Birjand, Iran

10.48308/ijrtei.2023.230316.1034

Abstract

With the increasing demand for electricity demand, power distribution utilities must provide an efficient and appropriate Service Restoration (SR) strategy to restore customers as soon as possible after power outages to increase the network resiliency and reliability. The heuristic SR algorithm presented in this article is a bi-stage algorithm that initially re-energizes some loads quickly by remote-controlled switches in the first stage and then proceeds to restore the rest of the network in the second stage. Beside solving the restoration problem in a bi-stage algorithm, determining the optimal Switching Sequences (SSs) and applying the Expected Energy Not Supplied (EENS) as objective function included in this research. Also, taking into account the time of occurrence of the failure and the daily load curve, the position of the maintenance team, load transfer capability and the traffic conditions of the network has increased the attractiveness and practicality of the proposed method. The heuristic SR algorithm was applied on a standard IEEE 69-bus system in various scenarios. The results indicated a significant difference in the solutions of the problem and the ENS in different scenarios. Finally, it was found that using this heuristic method would lead to optimal, accurate, and applicable solutions for SR in distribution networks.

Keywords

Service restoration

bi-stage restoration

expected switching time

energy not supplied

maintenance team location

Subjects