Diagnosis of the Non-Concurrent Operation of the On-Load Tap Changer Contacts by the Acoustic Emission Method

• Autorzy: Cichoń A. , Borucki S. , Boczar T.
• Języki publikacji: EN

Abstrakty

EN

On-load tap changers (OLTC) are some of the main transformer elements that make voltage adjustment in a power network possible. Their failures often cause shutdowns of distribution transformers. The paper presents research work aimed at the assessment of the technical condition of OLTCs by the acoustic emission method (EA). This method makes the OLTC diagnosis possible without the need of disconnecting the transformer from the system. The measurements were taken in laboratory conditions. The influence on the operation non-concurrence of the power tap changer contacts on the AE registered signals has been investigated. The signals registered were subjected to analyses in the time and time-frequency domains. The result analysis in the time domain was carried out using the Hilbert transform and calculating characteristic times for the particular runs. A short-time Fourier transform was used for the assessment of results in the time-frequency do- main.

Słowa kluczowe

EN

power transformer; on-load tap changers; acoustic emission method

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2011
• Tom: Vol. 36, No. 4
• Strony: 823--830
• Opis fizyczny: Bibliogr. 9 poz., fot., tab., wykr.

Twórcy

autor

Cichoń A.

autor

Borucki S.

autor

Boczar T.

• Technical University of Opole Institute of Electric Power Engineering Prószkowska 76, building 2, 45-758 Opole, Poland,

Bibliografia

• 1. Boczar T., Borucki S., Cichoń A., Zmarzły D. (2009), Application Possibilities of Artificial Neural Networks for Recognizing Partial Discharges Measured by the Acoustic Emission Method, IEEE Transactions on Dielectrics and Electrical Insulation, 16, 1, 214-223.
• 2. Cichoń A. (2009), The Application of the Selected Time-Frequency Descriptors Detection of the Acoustic Emission Signals Generated by Multisource Partial Discharges, Acta Physica Polonica A, 116, 3, 290-293.
• 3. Energo-Complex (2007), Transformers in exploitation [in Polish: Transformatory w eksploatacji ], 2nd Ed., collective work under J. Subocz [Ed.], Piekary Śląskie.
• 4. Erbrink J.J., Gulski E., Seitz P.P., Leich R. (2008), Advanced on-site diagnosis of transformer on-load tap changer, Proceedings of the International Symposium on Electrical Insulation, pp. 252-256.
• 5. Filho E.F.S., de Almeida L.A.L. (2008), Self-Organized Classification of on-load tap Changers acoustic signature, Proceedings of the International Instrumentation and Measurement Technology Conference, Victoria, pp. 1051-1056.
• 6. Kundu P., Kishore N.K., Sinha A.K. (2008), Behavior of Acoustic Partial Discharge Signal in Oil-Pressboard Insulation System, Proceedings of the International Conference Industrial and Information Systems, Kharagpur, pp. 1-6.
• 7. Report of Polish Society of the Transmission and Distribution of the Electricity (2002), Analysis of failure of transformer MV/LV on the example of some of the distribution companies [in Polish: Analiza awaryjności stacji transformatorowych SN/nN na przykładzie wybranych spółek dystrybucyjnych], Poznań.
• 8. Rivas E., Burgos J.C., Garcｴıa-Prada J.C. (2009), Condition Assessment of Power OLTC by Vibration Analysis Using Wavelet Transform, IEEE Transactions on Power Delivery, 24, 2, 687-694.
• 9. Skubis J., Cichoń A., Borucki S. (2009), Practical example of effective detection and location of partial discharges in power transformer using acoustic emission method [in Polish: Praktyczny przykład skutecznej detekcji i lokalizacji wyładowań niezupełnych metodą emisji akustycznej w transformatorze elektroenergetycznym], Pomiary Automatyka Kontrola, 55, 1, 30-33.