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A framework for the techno-economic and reliability analysis of grid connected microgrids

Ernestina Mawushie Amewornu (Department of Electrical and Electronic Engineering Science, University of Johannesburg, Johannesburg, South Africa)
Nnamdi I. Nwulu (Department of Electrical and Electronic Engineering Science, University of Johannesburg, Johannesburg, South Africa)

Journal of Engineering, Design and Technology

ISSN: 1726-0531

Article publication date: 17 September 2020

Issue publication date: 7 June 2021

121

Abstract

Purpose

This research studies the impact of introducing distributed generators (DGs) into a distribution network. The aim of this paper is to optimally site DGs based on economic, environmental and reliability indices are presented.

Design/methodology/approach

The considered network was modelled by using the network’s line parameters and capacity of the load bus with the help of Power System Analysis Toolbox. The location of the DG is based on voltage stability index and power loss reduction index. The DG energy sources considered are the diesel generator, solar photo-voltaic (PV) and wind generator, and the objectives were to minimize cumulative cost while maximizing reliability of the network. The Advanced Interactive Multidimensional Modelling System was used for the mathematical modelling.

Findings

The obtained results in the cases of introducing renewable energy into a network improves network performance. The benefits of renewable energy on the distribution network measured in terms of electricity production cost, gas emission cost, fuel cost and value of energy not supplied were positive. The research also showed that the total benefit of renewable energy reduces as the price of the renewable generators increases.

Originality/value

This paper introduces a new approach to determining the optimal location of DG for reducing line losses and improved voltage profile. A new cost modelling function based on external grid power transfer cost, technical losses and cost because of the various energies source is also introduced.

Keywords

Acknowledgements

The authors would like to acknowledge the assistance of Dr Joseph Essilfie in obtaining the data on the Juansa network.

Citation

Amewornu, E.M. and Nwulu, N.I. (2021), "A framework for the techno-economic and reliability analysis of grid connected microgrids", Journal of Engineering, Design and Technology, Vol. 19 No. 3, pp. 659-685. https://doi.org/10.1108/JEDT-05-2020-0185

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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