NDLI: Frequency method for identification of resonance overvoltages in transformer windings

Content Provider	IEEE Xplore Digital Library
Author	Florkowski, M. Furgał, J. Pajak, P.
Copyright Year	2010
Description	Author affiliation: AGH University of Science and Technology, Department of Electrical and Power Engineering, al. Mickiewicza 30, 30 - 059 Kraków, Poland (Furgał, J.; Pajak, P.) \|\| ABB Corporate Research, ul. Starowiślna 13A, 31 - 038 Kraków, Poland (Florkowski, M.)
Abstract	The insulation systems of power transformers are subjected to many transient overvoltages. They are usually generated in power systems during lightning and switching operations. If the spectrum of incoming surge voltage matches the winding one, the corresponding resonance might be excited. Therefore external transients occurring in power systems might trigger internal overvoltages with large maximum value in transformer windings. Overvoltages having such character have been the root cause of many power transformer failures. This paper presents an approach to the identification of sensitive zones in the transformer windings based on the measurements of overvoltages inside windings and frequency dependences of admittance of the transformer. The presented approach might be used both for design optimization and diagnostics of distribution and power transformers.
Starting Page	1
Ending Page	4
File Size	188232
Page Count	4
File Format	PDF
ISBN	9781424479450
e-ISBN	9781424479443
e-ISBN	9781424479436
DOI	10.1109/ICSD.2010.5568191
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-04
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Windings Surges Resonant frequency Surge protection Admittance Power transformer insulation frequency method identification power transformers resonance overvoltages
Content Type	Text
Resource Type	Article

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