Evaluation of the Technical Condition of the Active Part of the High Power Transformer Based on Measurements and Analysis of Vibroacoustic Signals

• Autorzy: Borucki S. , Cichoń A. , Majchrzak H. , Zmarzły D.

Identyfikatory

DOI

10.1515/aoa-2017-0033

• Języki publikacji: EN

Abstrakty

EN

This article presents the results of research connected with the development and industrial use of vibroacoustic methods for the evaluation of the technical condition of the active part of transformers. The article presents the results of the analysis of vibrations generated by the high power transformer in which a defect was found on the basis of tests of oil carried out using the chromatography tests. In order to confirm the damage of the active part of this transformer, vibroacoustic measurements were performed in three states of its operation. The measurement using the classical vibroacoustic method included the registration of vibrations at the idle speed and during the load operation of the transformer. The original diagnostic method, so-called the modified vibroacoustic method, was also used during the measurement. The analysis of signals recorded using the classical vibroacoustic method was carried out in the frequency domain by indicating the amplitude of even harmonic vibrations. However, the analysis of signals measured during the commissioning of the transformer was conducted in the time-frequency domain using the short-time Fourier transform (STFT), continuous wavelet transform (CWT), and discrete wavelet transform (DWT). On the basis of the analysis of the results obtained it was stated that the increased level of vibrations of this transformer is a consequence of the loss of rigidity of the mechanical structure of its core.

Słowa kluczowe

EN

vibration; vibroacoustic method; core; power transformer; transformer diagnostics

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2017
• Tom: Vol. 42, No. 2
• Strony: 313--320
• Opis fizyczny: Bibliogr. 13 poz., fot., rys., tab., wykr.

Twórcy

autor

Borucki S.

• Institute of Electrical Power and Renewable Energy, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland

autor

Cichoń A.

• Institute of Electrical Power and Renewable Energy, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland

autor

Majchrzak H.

• Institute of Electrical Power and Renewable Energy, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland

autor

Zmarzły D.

• Institute of Electrical Power and Renewable Energy, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland

Bibliografia

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• 2. Borucki S. (2009), Vibroacoustic Measurements in a Transient State of Transformer Operatrion, Acta Physica Polonica A, 116, 277–280.
• 3. Borucki S. (2012a), Diagnosis of Technical Condition of Power Transformers Based on the Analysis of Vibroacoustic Signals Measured in Transient Operating Conditions, IEEE Trans. on Power Del., 27, 670–676.
• 4. Borucki S. (2012b), Method for assessing technical condition of transformer, involves analyzing vibration acceleration, and locating small and narrow bands at harmonic components of upper band after passing transient to steady-state operation of transformer, Patent Number PL394036-A1; PL219843-B1, Politechnika Opolska.
• 5. Borucki S. (2014), Used of modified vibroacoustic method for diagnostics of power transformer cores, Studia i Monografie, No. 384, Printing House of Opole University of Technology, Opole.
• 6. Borucki S., Cichoń A. (2010), The influence of power transformer load on vibroacoustic signal analysis results, Przegląd Elektrotechniczny, 86, 45–47.
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• 13. Wotzka D., Boczar T., Malec T., Pierzga R. (2013), Analysis of Vibro-Acoustic Signals Generated during Operation of Micro Wind Turbines, Acta Physica Polonica A, 124, 595–597.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).