Power Transformer Condition Assessment Using Oil UV - Spectrophotometry

Arshad, M; Islam, Syed

doi:10.1109/CEIDP.2007.4451646

117497_Power%20transformer%20PID%20117497.pdf (316.6Kb)

Access Status

Open access

Authors

Arshad, M

Islam, Syed

Date

2007

Type

Conference Paper

Metadata

Show full item record

Citation

Arshad, M. and Islam, Syed. 2007. Power transformer condition assessment using oil UV - spectrophotometry, in Proceedings of Electrical Insulation and Dielectric Phenomena CEIDP 2007. (ed), 2007 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Oct 14 2007, pp. 611-614. Vancouver, Canada: IEEE Dielectrics and Electrical Insulation Society.

Source Title

2007 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

Source Conference

IEEE 2007 Annual Report on Electrical Insulation and Dielectric Phenomena

DOI

10.1109/CEIDP.2007.4451646

ISBN

1424414814

Faculty

School of Electrical Engineering and Computing

Department of Electrical and Computer Engineering

Faculty of Science and Engineering

Remarks

Copyright © 2008 IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

URI

http://hdl.handle.net/20.500.11937/7748

Collection

Curtin Research Publications

Abstract

Power transformers are considered critical equipment in an electric power transmission system. Electric utilities worldwide are now focusing on reliability centered maintenance of their assets for extended life and hence maximum return on investment. Recent utility survey shows that a large proportion of transformers has attained their designed life and is operating close to their nameplate rating or beyond. The load growth is compounding this problem on the existing transformers due to fewer extension projects, market deregulation and economic constraints. Diagnostics and proper monitoring plays key role in the life expectancy of a power transformer. Mineral oil in transformer is the inseparable component of the dielectric insulation system. The various contamination levels in oil can be examined and verified using UV-Spectrometry. The UV-spectrum analyzes the oil, qualitatively and quantitatively with respect to the contamination present in it and interprets dielectric response of the insulation system. The oil gets contaminated mainly due to the aging. Moisture, sludge, acids, metal particles and other compounds are produced due to aging insulation (mainly cellulose) which changes the oil chemical and physical properties. Accurate interpretation of the UV-Spectrophotometry and comparison with the past test signature provides sufficient assessment of power transformer insulation condition and predicts it's aging phenomena. This paper presents power transformer's dielectric response and aging assessment using oil contamination level identification with UV-Spectrometry measurements.