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2012 | 122 | 5 | 921-926
Article title

Location of Partial Discharge Sources and Analysis of Signals in Chosen Power Oil Transformers by Means of Acoustic Emission Method

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EN
Abstracts
EN
The original system useful for analysis of signals recorded during investigations of partial discharges within power oil transformers by means of acoustic method is presented. This method includes the basic and advanced analysis of recorded data. In the frame of basic analysis of data recorded signals undergo filtration in chosen frequency bands and next the analysis is made - in domain of time, frequency, time-frequency and discrimination threshold. In the frame of advanced analysis of data the amplitude distributions of acoustic emission signals and the acoustic emission descriptors (defined by the authors) are calculated in order to outline maps of acoustic emission descriptors on lateral walls of a transformer; it is a base for location of sources of partial discharges by means of the original method consisted in determination of advance degree of a signal. Results of this analysis, for signals recorded in two chosen transformers with identical construction (partial discharge occurred only within one of them), are presented in the paper. The source of partial discharge, situated within oil near transformer tank, was localized; the revision confirmed this result. Properties of recorded emission acoustic signals at chosen measuring points situated on the tank, in function of distance between the partial discharge source and measuring points, are presented.
Keywords
Contributors
author
  • Department of Optoelectronics, Silesian University of Technology, B. Krzywoustego 2, 44-100 Gliwice, Poland
author
  • Department of Optoelectronics, Silesian University of Technology, B. Krzywoustego 2, 44-100 Gliwice, Poland
References
  • [1] F. Witos, Investigation of Partial Discharges by Means of Acoustic Emission Method and Electric Method, SUT, Gliwice 2008 (in Polish)
  • [2] F. Witos, Z. Gacek, A. Opilski, Arch. Acoust. 27, 65 (2002)
  • [3] F. Witos, Z. Gacek, Europ. Phys. J. ST 154, 239 (2008)
  • [4] F. Witos, Z. Gacek, Acta Phys. Pol. A 116, 422 (2009)
  • [5] F. Witos, A. Olszewska, Acta Phys. Pol. A 118, 1267 (2010)
  • [6] Z. Deheng, T. Kexiong, T. Xianche, in: Properties and Application of Dielectric Materials, 2nd Int. Conf. Record, Ed. W. Huang, Univ. Bejing, Bejing 1988, p. 614
  • [7] S. Markalous, S. Tenbohlen, K. Feser, IEEE Trans. Diel. Electr. Insulat. (ITDEIS) 15, 1576 (2008)
  • [8] R. Witula, D. Slota, J. Math. Anal. Appl. 324, 321 (2006)
  • [9] High-Voltage On-Site Testing with Partial Discharge Measurement; Working Group D1.33, Task Force 05, June 2012, ISBN: 978-2-85873-194-7
  • [10] T. Boczar, S. Borucki, A. Cichon, M. Lorenc, Acta Phys. Pol. A 114, A-21 (2008)
  • [11] E. Howells, E.T. Norton, IEEE Trans. Power Apparat. Syst. PAS-103, 1111 (1984)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv122n529kz
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