Fault isolation in distributed generation connected distribution networks

Dewadasa, Jalthotage Manjula Dinesh, Ghosh, Arindam, Ledwich, Gerard, & Wishart , Michael (2011) Fault isolation in distributed generation connected distribution networks. IET Generation, Transmission and Distribution, 5(10), pp. 1053-1061.

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Protection of a distribution network in the presence of distributed generators (DGs) using overcurrent relays is a challenging task due to the changes in fault current levels and reverse power flow. Specifically, in the presence of current limited converter interfaced DGs, overcurrent relays may fail to isolate the faulted section either in grid connected or islanded mode of operation. In this paper, a new inverse type relay is presented to protect a distribution network, which may have several DG connections. The new relay characteristic is designed based on the measured admittance of the protected line. The relay is capable of detecting faults under changing fault current levels. The relay performance is evaluated using PSCAD simulation and laboratory experiments.

Impact and interest:

16 citations in Scopus
16 citations in Web of Science®
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521 since deposited on 21 Nov 2011
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ID Code: 47023
Item Type: Journal Article
Refereed: Yes
Keywords: Current Limiters, Distributed Power Generation, Fault Currents, Load Flow, Overcurrent Protection, Power Distribution Protection, Fault Detection, Fault Isolation
DOI: 10.1049/iet-gtd.2010.0735
ISSN: 1751-8687
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Electrical and Electronic Engineering not elsewhere classified (090699)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 The Institution of Engineering and Technology.
Copyright Statement: See http://electrical.theiet.org/help/legal.cfm for copyright statement.
Deposited On: 21 Nov 2011 02:28
Last Modified: 19 Jan 2012 13:01

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