Characteristic Analysis and Origin Positioning of Acoustic Signals Produced by Partial Discharges in Insulation Oil

Park, Dae-Won;Jo, Hyang-Eun;Kim, Sun-Jae;Kil, Gyung-Suk

  • Received : 2013.01.04
  • Accepted : 2013.05.29
  • Published : 2013.11.01


This paper dealt with the propagation characteristics of acoustic signals produced by partial discharges and the positioning of PD origin in insulation oil to develop insulation diagnostic techniques of oil-immerged transformers. Electrode systems such as needle to plane, plane to plane, and particle electrodes were fabricated to simulate some defects of power transformers. In addition, the frequency spectrum and propagation characteristics of acoustic signals with partial discharge (PD) in insulation oil were analyzed. Although there were differences based on the type of defect, the frequency spectra of the acoustic signals measured by wide and narrow band acoustic emission (AE) sensors were distributed in the range of 50 kHz-400 kHz. Therefore, a narrowband AE sensor is suitable for the diagnosis of oil-immersed power transformers. We could find the position of the PD source with an error margin of 10% in the experiments by calculating the position of the PD occurrence using the time difference of arrival measured by five AE sensors.


Acoustic signal;Partial discharge;Insulation diagnostic;Frequency spectrum;Positioning;Propagation


  1. M. MacAlpine, Z. Zhiqiang, M. Suleyman Demokan, "Development of a fiber-optic sensor for partial discharges in oil-filled power transformers", Electr. Power Syst. Res., Vol. 63, No. 1, pp. 27-36, 2002.
  2. H. Kawada, M. Honda, T. Inoue, T. Amemiya, "Partial discharges automatic monitor for oil-filled power transformer", IEEE Trans. Power Appar. Syst., Vol. PAS-103, No. 2, pp. 422-428, 1984.
  3. D. -W. Park, G. -S. Kil, S. -G. Cheon, S. -J. Kim and H. -K. Cha, "Frequency Spectrum Analysis of Electromagnetic Waves Radiated by Electric Discharges", Journal of Electrical Engineering & Technology, Vol. 7, No. 3, pp. 389-395, 2012.
  4. S. Coenen, S. Tenbohlen, S. M. Markalous, T. Strehl, "Sensitivity of UHF PD measurements in power transformers", IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 15, No. 6, pp.1553-1558, 2008.
  5. K. -J. Lim, S. -H. Yang, D. -H. Shin, N. -J. Park, D. - H. Park, "A Study on the design of a planar loop sensor for partial discharge diagnosis of 22.9 kV XLPE Power Cables", Journal of Electrical Engineering & Technology, Vol. 3, No. 4, pp.559-565, 2008.
  6. L. Angrisani, P. Daponte, G. Lupo, C. Petrarca, M. Vitelli, "Analysis of ultrawide-band detected partial discharges by means of a multiresolution digital signal-processing method", Measurement, Vol. 27, No. 3, pp.207-221, 2000.
  7. G. G. Karady, J. R. Oliva, S. Domitz, R. Meketa, "Advanced digital instrumentation for partialdischarge measurement Original Research Article", Electr. Power Syst. Res., Vol. 25, No. 3, pp.191-198, 1992.
  8. A. S. Farag, M. H. Shewhdi, X. Jin, C. Wang, T. C. Cheng, X. Dong, S. Gao, W. Jing, Z. Wang, "On-line partial discharge calibration and monitoring for power transformers Original Research Article", Electr. Power Syst. Res., Vol. 50, No. 1, pp.47-54, 1999.
  9. R. Sarathi, A. V. Giridhar, K. Sethupathi, "Analysis of partial discharge activity by a conducting particle in liquid nitrogen under AC voltages adopting UHF technique", Cryogenics, Vol. 50, No. 1, pp.43-49, 2010.
  10. D. Lin, L. Jiang, F. Li, D. Zhu, K. Tan, C. Wu, X. Jin, C. Wang, T. C. Cheng, "On-Line partial discharge monitoring and diagnostic system for power transformer Original Research Article", Tsinghua Science & Technology, Vol. 10, No. 5, pp. 598-604, 2005.
  11. J. Y. Jeong, D. S. Kang, J. H. Sun, J. C. Heo, C. H. Park, "Assessment of 23 kV capacitive coupler for on-line partial discharge measure-ments", Journal of Electrical Engineering & Technology, Vol. 4, No. 1, pp.123-130, 2009.
  12. L. E. Lundgaard, "Acoustic partial discharge detection, fundamental considerations", IEEE Electrical Insulation Magazine, Vol. 8, No. 4, pp. 25-31, 1992.
  13. G.-S. Kil, I.-K. Kim, D.-W. Park, S.-Y. Choi, C.-Y. Park, "Measurements and analysis of the acoustic signals produced by partial discharges in insulation oil", Cur. Appl. Phys., Vol. 9, No. 2, pp. 296-300, 2009.

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