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Rooftop photovoltaic system allocation to improve the distribution transformers life span using golden ratio optimization algorithm

Mohammad Amin Sobouti (Department of Electrical Engineering, Zanjan Branch, Islamic Azad University, Zanjan, Iran)
Mehdi Bigdeli (Department of Electrical Engineering, Zanjan Branch, Islamic Azad University, Zanjan, Iran)
Davood Azizian (Department of Electrical Engineering, Abhar Branch, Islamic Azad University, Abhar, Iran)

World Journal of Engineering

ISSN: 1708-5284

Article publication date: 19 November 2021

Issue publication date: 5 May 2023

59

Abstract

Purpose

This paper aims to evaluate the effect of optimal use of rooftop photovoltaic (PV) systems on improving the loss of life (LOL) of distribution transformers, reducing power losses as well as the unbalance rate of the 69-bus distribution network.

Design/methodology/approach

The problem is studied in three scenarios, considering different objective functions as multi-objective optimization in balanced and unbalanced operations. Meta-heuristic golden ratio optimization method (GROM) is used to determine the optimal size of the rooftop PV in the network.

Findings

The simulation results show that in all scenarios, the GROM by optimally installing the rooftop PV is significantly capable to reduce the transformer distribution loss of loss, unbalance rate and power loss as well as reduce the temperature of the oil and transformer winding. Also, the lowest %LOL, power loss and unbalance rate occurred in the second scenario for the balanced network and first scenario, respectively. In addition, the results showed that the unbalance of the network results in increased power losses and LOL of the distribution transformer.

Originality/value

The better capability of GROM is proved compared with the grey wolf optimization algorithm with better objective function and by achieving better values of LOL, unbalance rate and power loss. The results also showed that the %LOL, unbalance and power losses are weakened compared to without considering the PV cost but the achieved results are realistic and cost-effective.

Keywords

Citation

Sobouti, M.A., Bigdeli, M. and Azizian, D. (2023), "Rooftop photovoltaic system allocation to improve the distribution transformers life span using golden ratio optimization algorithm", World Journal of Engineering, Vol. 20 No. 3, pp. 458-471. https://doi.org/10.1108/WJE-07-2021-0432

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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