Suppression method of partial-discharge interference signal based on the combination of morphological filters and complex wavelet transform

• Autorzy: Wang Y. , Zhang D. , Lu G. , Huang Y.

Warianty tytułu

PL

Tłumienie zakłóceń od pochodzących od wyładowań niezupełnych – filtry morfologiczne i złożona transformata falkowa

• Języki publikacji: EN

Abstrakty

EN

Solving the periodic narrowband interference and suppression of white noise during the actual detection of partial discharge (PD) are difficult. In this paper, a method of suppressing the interference signal method based on the combination of morphological filters and complex wavelet transform is proposed. Generalized morphological filters based on the principle of mathematical morphology were structured and set as a pre-filter unit to realize pre-treatment of the original PD signals, and complex wavelet transform was then employed to process the PD signals. Finally, denoised PD signals were obtained. Applying this method to deal with the noise in the simulation and acquisition of PD signals, the results showed that the method can restrain effectively the PD periodic narrowband interference and white noise. Compared with the same wavelet base of the wavelet and the complex wavelet denoising methods, this method reduces energy loss and retains well the PD signals characteristics.

PL

W artykule opisano metodę tłumienia zakłóceń (zakłócenia wąskopasmowe, biały szum) w sygnałach, w przypadku wykrycia wyładowań niezupełnych. W rozwiązaniu wykorzystano kombinację filtrów morfologicznych, działających jako pre-filtr i złożoną transformatę falkową do dalszej obróbki sygnałów. Wykonano badania symulacyjne, potwierdzające skuteczność filtracji.

Słowa kluczowe

EN

narrowband; white noise; mathematical morphology; complex wavelets; suppression

PL

zakłócenia wąskopasmowe; biały szum; morfologia matematyczna; transformata falkowa

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2013
• Tom: R. 89, nr 4
• Strony: 123--128
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Wang Y.

• State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University)

autor

Zhang D.

• State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University)

autor

Lu G.

• Testing and Research Institute, Guangzhou Power Supply Bureau

autor

Huang Y.

• Testing and Research Institute, Guangzhou Power Supply Bureau

Bibliografia

• [1] Tang, J.; Sun, C.X.; et al. Application of Wavelet Packet Transform to the Suppression of White-noise and Periodic Narrowband Interference in Partial Discharge Signals. High Voltage Engineering, 2002,28(12):8-10
• [2] Wang, X.X.; Sun, S.X.; Ma, D.G. Suppression of periodic pulse interference in on-line PD monitoring systems．Transformer，2002，39(S1)：36-38
• [3] Tang, J.; Gao, L.; Xie, Y.B.; et al. Suppressing PD's Periodicity Narrow Band Noise in the PD Measurement by Using Complex Wavelet Packet Transform. High Voltage Engineering, 2008,34(11):2355-2361
• [4] Xu, S.Z.; Zhu, Z.S.; Qin, S.L.; et al．Suppression of the periodic pulse shaped interference for on-line PD monitoring．High Voltage Engineering，2001，27(1):32-34
• [5] Liu, Y.P.; Lv, F.C.; Li, C.R.; et al. Study of the Mathematical Morphological Filter in Suppressing Periodic Narrow Bandwidth Noise of PD. Proceeding of the CSEE, 2004,24（3）：169-173
• [6] Chen, P.; Li, Q.M.; Design and analysis of mathematical morphology-based digital filters．Proceedings of the CSEE，2005，25(11)：60-65
• [7] Bi, W.M.; Tang, J.; Yao, C.G.; et al. Simulation and experiment study on wavelet packet decomposition based on entropy threshold for DSI rejection of PD. Proceedings of the CSEE, 2003, 23(5):128-131
• [8] Cheng, W.L.; Guo, Y.X.; Wang, J.; et al. Application of Fast Fourier Transform and Generalized Morphological Filter in Suppression of Narrow-Band Interference in Partial Discharge Signal. Power System Technology, 2008,32(10):94-97
• [9] Li, T.Y.; Yang, M.; Zhou, X.C.; et al. Method of Partial Discharge Signal Analysis Based on Wavelet Transform and Mathematical Morphology. Power System Technology, 2007,31(6):56-60
• [10] Cui, Y. The method of mathematical morphology and applications. Beijing: Science Press,2000
• [11] Yin, W.Q.; Liu, Q.J. Mathematical Morphology Review and Its Application in Power System.Relay,2007,35( 19) : 76-83
• [12] Chen, X.X. Complex compactly supported orthonormal wavelets and their applications in power system. Proceeding of the CSEE, 2000, 20(7): 83-88
• [13] Tang, J.; Xie, Y.B.; Zhu, W.; et al. Suppression of narrowband interference with EWC threshold method for complex wavelet transform. Automation of Electric Power Systems, 2005, 29(7): 43-47
• [14] Tang, J.; Peng, L.; Xie, Y.B. An Algorithm of Complex Multilevel Threshold for Reducing White-noise .Proceedings of the CSEE, 2007, 27(21): 25-30
• [15] Zhou, X.; Zhou, C.; Kemp I J. An improved methodology for application of wavelet transform to partial discharge measurement denoising. IEEE Transactions on Dielectric and Electrical Insulation, 2005, 12(3): 586-594
• [16] Werle P, Akbari A, Borsi H, et al. Enhanced online PD evaluation on power transformers using wavelet techniques and frequency rejection filter for noise suppression[C]∥Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation. Boston, MA, USA: IEEE, 2002: 195-198
• [17] Tang, J.; Gao, L.; Peng, L.; et al. Study on new evaluation parameters for denoising performance of non-stationary oscillating partial discharge signals. High Voltage Engineering, 2007, 33(12): 66-70