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Energies 2016, 9(11), 956; doi:10.3390/en9110956

Distributed Generation Islanding Effect on Distribution Networks and End User Loads Using the Load Sharing Islanding Method

1
Department of Electrical and Electronic Engineering, City, University of London, London EC1V 0HB, UK
2
Department of Electrical and Electronic Engineering Educators, School of Pedagogical and Technological Education, Ν. Ηeraklion, 141 21 Athens, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Josep M. Guerrero
Received: 28 July 2016 / Revised: 23 October 2016 / Accepted: 8 November 2016 / Published: 16 November 2016
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Abstract

In this paper a realistic medium voltage (MV) network with four different distributed generation technologies (diesel, gas, hydro and wind) along with their excitation and governor control systems is modelled and simulated. Moreover, an exponential model was used to represent the loads in the network. The dynamic and steady state behavior of the four distributed generation technologies was investigated during grid-connected operation and two transition modes to the islanding situation, planned and unplanned. This study aims to address the feasibility of planned islanding operation and to investigate the effect of unplanned islanding. The load sharing islanding method has been used for controlling the distributed generation units during grid-connected and islanding operation. The simulation results were validated through various case studies and have shown that properly planned islanding transition could provide support to critical loads at the event of utility outages. However, a reliable protection scheme would be required to mitigate the adverse effect of unplanned islanding as all unplanned sub-cases returned severe negative results. View Full-Text
Keywords: distributed generation; islanding; load sharing; distribution networks; Neplan simulation tool distributed generation; islanding; load sharing; distribution networks; Neplan simulation tool
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kreishan, M.Z.; Fotis, G.P.; Vita, V.; Ekonomou, L. Distributed Generation Islanding Effect on Distribution Networks and End User Loads Using the Load Sharing Islanding Method. Energies 2016, 9, 956.

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