Separation Research of Ultrasonic Wave in Transformer Partial Discharge Based on Improved Waveform Matching

Abstract:

The use of direct wave to locate the position of the PD source is of better accuracy in transformer partial discharge ultrasound array positioning. For the signal received by ultrasonic sensor is consisted by direct wave, non-direct wave and a variety of noise, a direct wave separation method based on improved waveform matching is proposed in this paper. It is considered that the direct wave first reaches the ultrasonic sensor. A benchmarks triangle is built and then the attenuation coefficient and the signal frequency are both calculated. In order to search the matching wave, the benchmarks triangle is to pan and zoom. Finally, the best matching waveform is selected from a large number of matching waveforms as a direct wave signal. The result of simulation shows that the method can isolate the ultrasonic direct wave signal from the received signal, which provides some theoretical guidance to improve the position accuracy of the PD source.

• Periodical: Applied Mechanics and Materials (Volumes 291-294)
• Pages: 2325-2330
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.291-294.2325
• Online since: February 2013
• Authors: Hong Ling Xie, Fei Wang, Yan Qing Li, Fei Long Wang
• Keywords: Direct Wave, Partial Discharge (PD), Positioning, Separation, Ultrasonic Wave (UW)

References

[1] Pedrsen A, Crichton G C, Mcallister I W. IEEE Transaction on Dielectrics and Electrical Insulation. 1991, 26(3): 487-496.

[2] Lvrong Qiu, Naiqing Wang. Electrical equipment partial discharge testing techniques[M]. Machinery Industry Press, 1994: 5-12, in Chinese.

[3] Li-Jung Chen, Ta-Peng Tsao, Yu-Hsun Lin. IEEE Transactions on Power Delivery, 2005, 20(4): 2501-2508, in Chinese.

[4] Qing Xie. Research on Partial Discharge Ultrasonic Array Location Method in Transformer Based on Spatial Spectrum Estimation[D]. Baoding, in Chinese.

[5] Massimo Pompili. Partial Discharge Development and Detection in Dielectric Liquids. IEEE Transactions on Dielectrics and Electrical Insulation Vol. 16, No. 6; December (2009).

DOI: 10.1109/tdei.2009.5361585

[6] Mukuen Chen, Chao-yuan Cheng. Partial Discharge Detection on Cast Resin Power Transformer. Proceedings of 2008 International Symposium on Electrical Insulating Materials, September 7-11, 2008, Yokkaichi, Mie, Japan.

DOI: 10.1109/iseim.2008.4664578

[7] Yong Lu, Wei Li. Science and Technology Information Development and Economic, 2003, 13(5): 132-134, in Chinese.