Condition assessment of power transformer onload tap changers using wavelet analysis and self-organizing map: field evaluation

Kang, Pengju & Birtwhistle, David (2003) Condition assessment of power transformer onload tap changers using wavelet analysis and self-organizing map: field evaluation. IEEE Transactions on Power Delivery, 18(1), pp. 78-84.

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An onload tap changer (OLTC) is the most maintenance intensive subassembly on a power transformer. Vibration monitoring is an effective technique that can be used to assess the condition of an OLTC nonintrusively. The authors have developed a condition monitoring system for common types of OLTCs that enables the condition of tap changer contacts and associated drive system to be inferred from vibration signals. A number of prototype systems have been installed onto OLTCs in distribution zone substations for field trials. Particular emphasis has been given to the detection of faults in a particular type of older tap changer that had been prone to a range of faults associated with the switching contacts and drive mechanism. For this type of tap changer, it has been shown to be possible to determine not only that the tap changer is aging but also to identify the particular part that is degrading.

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52 citations in Scopus
31 citations in Web of Science®
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ID Code: 10684
Item Type: Journal Article
Refereed: Yes
Keywords: condition monitoring fault location on load tap changers power engineering computing self, organising feature maps wavelet transforms
DOI: 10.1109/TPWRD.2002.803692
ISSN: 0885-8977
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2003 IEEE
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 12 Nov 2007 00:00
Last Modified: 29 Feb 2012 13:03

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