Czasopismo | PRZEGLĄD ELEKTROTECHNICZNY | Rocznik 2017 - zeszyt 3

Discrete wavelet transformation in spectral analysis of vibration processes at hydropower units

10.15199/48.2017.03.16

nr katalogowy: 104302
10.15199/48.2017.03.16

The paper presents application of wavelet transform in vibration diagnostics of hydropower units. It lies in the fact that, in view of a considerable nonstationarity of vibroacoustic signals, the spectral analysis thereof comprises discrete wavelet transformation so that spectral information both in frequency and time domain could be obtained and applied for hydropower unit diagnosis. Streszczenie. Artykuł prezentuje zastosowanie transformaty falkowej do wibracyjnej diagnostyki hydrogeneratorów. Biorąc pod uwagę niestacjonarny charakter sygnałów wibroakustycznych i dokonując analizy za pomocą dyskretnej transformaty falkowej uzyskuje się informację potrzebne do diagnostyki hydrogeneratora (Dyskretna transformata falkowej w analizie spektralnej zjawisk wibracyjnych hydrogeneratorów). Keywords: vibroacoustic signal, discrete wavelet transformation, hydropower unit. Słowa kluczowe: sygnał wibroakustyczny, dyskretne przekształcenie falkowe, hydrogenerator. Introduction The future of the world’s economics is closely related to accelerated development of power sources, hydropower industry being one of them. At the same time, hydraulic power plants (HPP), especially high-power ones, may in case of an emergency represent a significant hazard to environment and people, as it was the case with Nurekskaya HPP (Tajikistan, 1983), Sayano-Shushenskaya HPP (Russia, 2009), as well as in Switzerland (2000), USA (2005), India (2009, 2013) etc. That is why timely diagnostics and particularly forecasting of hydropower units’ defects are of great significance. Vibration diagnostics is one of the most widespread diagnostics types, since vibration signal’s almost instantaneous reaction to change in equipment condition is a very important property in case o an emergency, when the speed of diagnosis establishment and decision making is a determinant factor. Vibration diagnostics is a discipline that comprises theory and methods for arra[...]

Bibliografia

[1] Mal lat S., A Wavelet tour in signal processing (3rd edition) the sparse way, Academic Press, New York, (2009)
[2] Blat ter C. , Wavelet analysis. Theory fundamentals, Tekhnosfera, (2004)
[3] Daubechies I., Ten lectures on wavelets, SIAM, (1992)
[4] Kukhar chuk , V. V., Kaz yv S. Sh., Madiarov V. G., Bykov sk y S. O., Investigation of results of vibration signal’s discrete wavelet transformation with compression coefficient 2 and various mother wavelets, Visnyk Inzhenernoi Akademii Ukrainy, (2011), n. 2., 66-69
[5] Kukhar chuk V.V., Kaz yv S.Sh., Evaluating the efficiency of algorithms for discrete wavelet transformation of vibration signals with various compression coefficients, Visnyk Vinnytskogo Politekhnichnogo Institutu, (2012), n.4, 151-154
[6] Kukhar chuk V.V., Kaz yv S.Sh., Govor I.K,. B ykov sk y S.O., Comparative analysis of results of discrete wavelet transformation of vibration signals with arbitrary whole compression coefficients, Visnyk Inzhenernoi Akademii Ukrainy, (2011), n.2, 172-176
[7] Os ipov D.S., L yutarevich A.G., Gapirov R.A., Gorunov V.N., Bubenchikov A.A., Applications of Wavelet Transform for Analysis of Electrical Transients in Power Systems: The Review, Przegląd Elektrotechniczny, (2016), n.4, 162-165
[8] Pis tun E., Yakymchuk N., Development of the automatic of the automatic control system of pumping station for urban water supply, IAPGOŚ, (2014), n.2, 68-71
[9] Kukhar chuk V.V., Kaz yv S.Sh., Bykov sk y S.O., Frequency identification of scale coefficients of discrete wavelet transformation in vibration signals, Visnyk Inzhenernoi Akademii Ukrainy, (2012), n.1, 138-142

Jeśli masz wykupiony/przyznany dostęp - zaloguj się. Skorzystaj z naszych propozycji zakupu!

Publikacja


e-Publikacja (format pdf) - nr 54016 "BADANIA NAD PROCESEM CIĄG..." licencja: Osobista Produkt cyfrowy	10.00 zł

Zeszyt


RUDY I METALE NIEŻELAZNE - e-zeszyt (pdf) 2010-7 licencja: Osobista Produkt cyfrowy	32.00 zł

Zeszyt

2017-3

Twój Koszyk

Publikacja

Zeszyt

Zeszyt

Czasopisma