Location and Identification of Acoustic Signals Recorded in Power Oil Transformers within the Band of 20-180~kHz

• Authors: A. Olszewska , F. Witos
• Languages of publication: EN

Abstracts

EN

Emission acoustic signals, recorded in investigated power oil transformers, have been analyzed in the time, frequency and time-frequency domain. Analysis of each signal has been started by filtration within selected frequency band and subsequently the following quantities have been calculated: spectral power density, phase-time characteristic, averaging phase-time characteristic, short-time Fourier transform spectrograms, signal amplitude distributions, descriptors with acronyms ADC and ADP and thereafter maps of descriptors on lateral walls of transformers can be carried out. Frequency bands applied in order to filtration have been chosen in such a way so that signals coming from different sources (among other things from partial discharges, Barkhausen's effect, oil circulation and outer acoustic disturbances) can be differentiated. The sources have been localized using maps of descriptors calculated for selected frequency bands. The fundamental properties of obtained signals have been determined. Such properties describe: partial discharges, Barkhausen's acoustic effect and other acoustic interferences.

Keywords

EN

52.80.-s; 77.22.Jp; 84.70.+p; 43.40.Le; 43.60.Lq

Discipline

• 84.70.+p: High-current and high-voltage technology: power systems; power transmission lines and cables(for superconducting cables, see 84.71.Fk)
• 77.22.Jp: Dielectric breakdown and space-charge effects(for dielectric breakdown in gases, see 51.50.+v)
• 52.80.-s: Electric discharges(see also 51.50.+v Electrical properties of gases; for plasma reactions including flowing afterglow and electric discharges, see 82.33.Xj in physical chemistry and chemical physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 120
• Issue: 4
• Pages: 709-712

Dates

published

2011-10

Contributors

author

A. Olszewska

• Department of Optoelectronics, Silesian University of Technology, B. Krzywoustego 2, 44-100 Gliwice, Poland

author

F. Witos

• Department of Optoelectronics, Silesian University of Technology, B. Krzywoustego 2, 44-100 Gliwice, Poland

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Identifiers

DOI

10.12693/APhysPolA.120.709