Archives of Acoustics, 41, 2, pp. 265–276, 2016

Study on Descriptors of Acoustic Emission Signals Generated by Partial Discharges under Laboratory Conditions and in On-Site Electrical Power Transformer

Opole University of Technology

Andrzej CICHOŃ
Opole University of Technology

Sebastian BORUCKI
Opole University of Technology

An acoustic emission method (AE) is widespread and often applied for partial discharge (PD) diagnostics, mainly due to its ease of application as well as noninvasiveness and relatively high sensitivity. This paper presents comparative analysis of AE signals measurement results archived under laboratory conditions as well as on-site actual AE signals generated by inside PDs in electrical power transformer during its normal service. Three different PD model sources are applied for laboratory research: point to point, multipoint to plate and surface type. A typical measuring set up commonly used for on-site transformer PD diagnostics is provided for the laboratory tasks: piezoelectric joint transducer, preamplifier, amplifier and measuring PC interface. During the on-site research there are three measuring tracks applied simultaneously. Time domain, time-frequency domain and statistical tools are used for registered AE signals analysis. A number of descriptors are proposed as a result of the analysis. In the paper, attempt of AE signals descriptors, archived under laboratory condition application possibilities for on-site PD diagnostics of power transformers during normal service is made.
Keywords: acoustic emission; partial discharge; transformer diagnostics.
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Błachowicz A., Boczar T.,Wotzka D. (2016), Application of a mobile system in diagnostics of power capacitors using the acoustic emission method, Insight, 58, 2.

Boczar T., Malec T., Wotzka D. (2012), Studies on infrasound noise emitted by wind turbines of large power, Acta Physica Polonica A, 122, 850–853.

Bolin L. (1979), A model for estimating the signal from an acoustic emission source, Ultrasonics, 17, 67–70.

Cichoń A., Borucki S., Wotzka D., Szmajda M. (2012), Characteristics of acoustic emission signals generated by the contacts of the selector, Acta Physica Polonica A, 122, 804–807.

Cichoń A., Frącz P., Zmarzły D. (2011), Characteristic of acoustic signals generated by operation of on load tap changers, Acta Physica Polonica A, 120, 585–588.

Deng J., Xiao H., Huo W., Luo M., May R., Wang A., Liu Y. (2001), Optical fiber sensor-based detection of partial discharges in power transformers, Optics & Laser Technology, 33, 305–311.

Farag A.S., Shewhdi M.H., Jin X., Wang C., Cheng T.C., Dong X., Gao S., Jing W., Wang Z. (1999), On-line partial discharge calibration and monitoring for power transformers, Electric Power Systems Research, 50, 47–54.

Frącz P. (2013), Measurement of Optical Signals Emitted by Surface Discharges on Bushing and Post Insulator, IEEE Transactions on Dielectrics and Electrical Insulation, 20, 1909–1914.

Frącz P., Boczar T., Borucki S. (2013), Analysis of Optical Radiation Generated by Electrical Discharges on Support Insulator, Acta Physica Polonica A, 124, 413–416.

Frącz P., Boczar T., Borucki S., Cichoń A., Zmarzly D. (2012), Results of Optical Signals Analyses Emitted by Electrical Discharges Recorded with UV Camera, Acta Physica Polonica A, 122, 814–817.

Frącz P., Zmarzły D., Boczar T. (2015), Characteristic of Surface Partial Discharges Measured with Ultraviolet Camera, Acta Physica Polonica A, 127, 715–718.

Garcia-Colon V.R., Linan-Garcia R., Jacobo M.A. (2004), On-line condition assessment of high voltage current transformers, Conference Record of the IEEE International Symposium on Electrical Insulation, Indianapolis, pp. 182–185.

Grossman E., Feser K. (2001), Online PD-monitoring on transformers using AE techniques, Proceedings of International Conference on APTADM, Wrocław, pp. 264–268.

Lin D., Jiang L., Li F., Zhu D., Tan K., Wu C., Jin X., Wang C., Cheng T.C. (2005), On-line partial discharge monitoring and diagnostic system for power transformer, Tsinghua Science & Technology, 10, 598–604.

Lopatkiewicz R., Nadolny Z., Przybylek P. (2012), The Influence of Water Content on Thermal Conductivity of Paper Used as Transformer Windings Insulation, Proceedings of 10th IEEE International Conference on the Properties and Applications of Dielectric Materials, Bangalore, pp. 1–4.

Menon R., Kolambekar S., Buch N.J., Ramamoorty M. (2001), Correlation of acoustic emission method and electrical method for detection of partial discharges in transformer, Proceedings of 7th IEEE International Conference on Solid Dielectrics, Eindhoven, pp. 299–302.

Naderi M.S., Vakilian M., Blackburn T.R., Phung B.T., Nasiri A. (2007), A hybrid transformer model for determination of partial discharge location in transformer winding, IEEE Transactions on Dielectrics and Electrical Insulation, 14, 436–443.

Pierzga R., Boczar T., Wotzka D., Zmarzły D. (2013), Studies on infrasound noise generated by operation of low-power wind turbine, Acta Physica Polonica A, 124, 542–545.

Pollock R.W.B., Stephens A.A. (1971), Waveform and frequency spectra of acoustic emissions, The Journal of Acoustical Society of America, 49, 110–114.

Sharkawy R.M., Fakhry S., Anis H., Ghazaly H.A. (2005), Particle detection in oil using acoustic and electrical based techniques in correlation with an inference method, Proceedings of Conference on Instrumentation and Measurement Technology, Ottawa, pp. 1080–1085.

Szmechta M., Boczar T., Fracz P. (2011), Frequency and Time-Frequency Analysis of Acoustic Cavitation Noise in Insulating Oils, Acta Physica Polonica A, 120, 744–749.

Wang P., Li B., Roman H.T., Russo O.L., Chin K., Farmer K.R. (2006), Acousto-optical PD detection for transformers, IEEE Transactions on Power Delivery, 21, 1068–1073.

Witos F., Gacek W. (2008), Application of the joint electro-acoustic method for PD investigation within a power transformer, The European Physical Journal – Special Topics, 154, 239–247.

Wotzka D., Boczar T., Frącz P. (2011), Mathematical Model and Numerical Analysis of AE Wave Generated by Partial Discharges, Acta Physica Polonica A, 120, 767–771.

Wotzka D., Lusa T. (2015), Theoretical study on the phenomena connected with cracking occurring in steel pipe based on multiphysical FE model, Journal of Mechanical Science and Technology, 29, 3225–3237.

Wotzka D., Zmarzły D., Boczar T. (2010), Numerical simulation of acoustic wave propagating in a spherical object filled with insulating oil, Acta Physica Polonica A, 118, 1272–1275.

Zhang H., Blackburn T.R., Phung B.T., Sen D. (2007), A novel wavelet transform technique for on-line partial discharge measurements: Part 2: On-site noise rejection application, IEEE Transactions on Dielectrics and Electrical Insulation, 14, 15–22.

Zmarzly D., Nagi Ł. (2014), Analysis of Ionizing Radiation Generated by Partial Discharges, Acta Physica Polonica A, 125, 1377–1379.

DOI: 10.1515/aoa-2016-0026

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