Power loss reduction and reliability improvement of a large-scale electrical distribution system using network reconfiguration

Author(s): Arun Onlam, Daranpob Yodphet, Apirat Siritaratiwat, Rongrit Chatthaworn, Chayada Surawanitkun and Pirat Khunkitti
Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University 40002, Thailand
International Journal of Smart Grid and Clean Energy, vol. 8, no. 1, January 2019: pp. 70-79
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.8.1.70-79

Abstract: Network reconfiguration of an electrical distribution system is an outstanding technique to improve the performance of a distribution system. The main factors indicating the performance of the system are the electrical power loss and the system reliability. In this paper, the multi-objective reconfiguration of a large-scale electrical distribution system located in Khon Kaen province, Thailand is proposed by using the Enhanced Genetic Algorithm. The total electrical power loss, system average interruption frequency index, system average interruption duration index, energy not supplied and the total cost are analyzed as the objective functions. The results show that the power loss of the illustrative system is significantly reduced as compared to the initial configuration. Furthermore, the reliability indices of the distribution system can be improved, while the total cost is decreased. Thus, it is indicated that the overall performance of the particular distribution system is significantly improved after network reconfiguration, which can be utilized for distribution system expansion planning.

Keywords: multi-objective function reconfiguration, genetic algorithm, optimal total cost, optimal distribution power system
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