Directional earth fault relay operation in mutually coupled multiple circuit distribution lines

Perera, Lasantha B. (2010) Directional earth fault relay operation in mutually coupled multiple circuit distribution lines. In 20th Australasian Universities Power Engineering Conference 2010 (AUPEC 2010), 5-8 December 2010, Christchurch, New Zealand.

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Many of the power utilities around the world experienced spurious tripping of directional earth fault relays in their mesh distribution networks due to induced circulating currents. This circulating current is zero sequence and induced in the healthy circuit due to the zero sequence current flow resulting from a ground fault of a parallel circuit. This paper quantitatively discusses the effects of mutual coupling on earth fault protection of distribution systems. An actual spurious tripping event is analyzed to support the theory and to present options for improved resilience to spurious tripping.

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ID Code: 39375
Item Type: Conference Paper
Refereed: Yes
Keywords: Protection, Earth fault, Mutual zero sequence impedance, Spurious tripping, Induced circulating current
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Power and Energy Systems Engineering (excl. Renewable Power) (090607)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2010 Please consult the author.
Deposited On: 05 Jan 2011 01:56
Last Modified: 29 Feb 2012 14:31

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