Archives of Acoustics, 42, 2, pp. 297–311, 2017
10.1515/aoa-2017-0032

Calibration and Laboratory Testing of Computer Measuring System 8AE-PD Dedicated for Analysis of Acoustic Emission Signals Generated by Partial Discharges Within Oil Power Transformers

Franciszek WITOS
Silesian University of Technology
Poland

Grzegorz SZERSZEŃ
State Higher Vocational School in Tarnow
Poland

Zbigniew OPILSKI
Department of Optoelectronics, Faculty of Electrical Engineering, Silesian University of Technology
Poland

Maciej SETKIEWICZ
Silesian University of Technology
Poland

Aneta OLSZEWSKA
Silesian University of Technology
Poland

Dominik DUDA
Silesian University of Technology
Poland

Krzysztof MAŹNIEWSKI
Silesian University of Technology
Poland

Marek SZADKOWSKI
Silesian University of Technology
Poland

In the paper, there are presented a general description of the constructed measuring system 8AE-PD, the results of calibration of this system by the Hsu-Nielsen method as well as the testing of the measuring system during recording signals generated by Hsu-Nielsen sources in a steel plate and a modeled partial discharge (PD) source. There is also presented the methodology of investigations by the calibrated acoustic emission method. The results of analyses of PD signals coming from the modeled sources are given. In particular, there are described the properties of acoustic emission (AE) signals generated by the PDs as well as the dependencies of the peak-to-peak voltage $U_{mm}$, the RMS voltage $U_{rms}$ and the descriptors of acronyms ADP and ADC on the apparent charge Q introduced by the modeled PD source. There are determined the limit values of the apparent charge Q introduced by the modeled PD source for which
the recorded signal is identified as originating from the PDS.
Keywords: multichannel system; calibration; acoustic emission; partial discharge; power oil transformers
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References

Boczar T. (2001), Identification of specific type of PD from AE frequency spectra, IEEE Trans. on Dielectric and Electrical Insulation, 8, 4, 598–606.

Duda D., Mażniewski K., Szadkowski M. (2014), The complementary use of methods of electric and acoustic to analyze the modeled sources of partial discharges [in Polish], Przegląd Elektrotechniczny 90, 10, 129–132.

EN 13477-2:2010 Non-destructive testing – Acoustic emission – Equipment characterisation – Part 2: Verification of operating characteristic.

Gacek Z., Szadkowski M., Malitowski G., Witos F., Olszewska A. (2011), Anusual application of partial discharges to diagnose of high voltage power transformers.

-Acta Phys. Pol. A, 120, 4, 609–615.

Hsu N., BreckenridgE F. (1981), Characterization and calibration of AE sensors, Materials Evaluation, 39, 1, 60–69.

Macalpine M., Zhiquiang Z., Demokan M.S. (2002), Development of a fibre-optic sensor for PDs in oil-filled power transformers, Electric Power System Research, 63, 227–236.

Malecki I., Witos F., Opilski A. (1993), AE source parameters in coal samples, Acustica, 79, 2, 112–116.

Olszewska A., Witos F. (2011), Location and identification of acoustic signals recorded in power oil transformers within the band of 20–180 kHz, Acta Phys. Pol. A., 120, 4, 709–712.

Olszewska A., Witos F. (2012) Location of partial discharge sources and analysis of signals in chosen power oil transformers by means of acoustic emission method, Acta Phys. Pol. A., 122, 5, 921–926.

Opilski A., Witos F., Ranachowski J., Ranachowski Z. (1985), Applications of AE for the investigations of stresses in geological materials, Acoustics Letters, 8, 7, 109–114.

Sarathi R., Singh P.D., Danikas M.G. (2007), Characterization of partial discharges in transformer oil insulation under DC and AC voltage using acoustic emission technique, Journal of Electrical Engineering, 58, 2, 91–97

Skubis J. (1993), Acoustic emission studies of insulation of electrical power devices [in Polish], IPPT PAN, Warszawa.

Ranachowski Z. (1992), Generation and propagation of standard pulses of acoustic emission [in Polish], Prace IPPT, 36, Warszawa.

Witos F., Opilski A., Lutyńki A. (1989), Investigations of AE pulses in horizontal transport belts used in mining, subject to uniaxial stresses, Ultrasonics, 7, 5, 182–185.

Witos F. (2008), Investigation of partial discharges by means of acoustic emission method and electric method [in Polish],Wydawnictwo Politechniki Śląskiej, Gliwice.

Witos F., Gacek Z. (2008), Application of the joint electro-acoustic method for partial discharge investigations within a power transformer, European Physical Journal: Special Topics, 154, 1, 239–247.

Witos F., Olszewska A., Szerszen G. (2011), Analysis of properties characteristic for acoustic emission signals recorded on-line in power oil transformers, Acta Phys. Pol. A, 120, 4, 759–762.

Witos F., Opilski Z. (2012), The method of partial discharges locating, particularly in the power oil transformers, based on the map of acoustic emission descriptors in the frequency domain, Patent: PL 223 605.

Witos F., Szerszen G., Setkiewicz M., Opilski Z., Gacek Z., Urbanczyk M. (2012), The computer measuring system of acoustic emission signals 8AE-PD dedicated for partial discharges investigation (in Polish), Przegląd Elektrotechniczny, 88, 11b, 146–150.

Witos F., Gacek Z. (2013), Testing of partial discharges and location of their sources in generator coil bars by means of acoustic emission and electric methods. Acoustic emission – research and applications. Ed. by Wojciech Sikorski, Rijeka, InTech, 117–145.




DOI: 10.1515/aoa-2017-0032

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