Abstract
The acoustic emission (AE) method could be used to detect and locate partial discharges (PD) in cast-resin dry-type transformers. However, due to the high sound attenuation in the filled epoxy, the signal is prone to interference from external noises and thus, in practice, there is little possibility of detecting PD. In this study, two techniques were developed to alleviate the shortcomings of the AE method. First, a waveguide is installed on the high-voltage (HV) windings, so that the acoustic signals of PD will propagate to the AE sensors that are installed on both terminals of the waveguide. The location of the winding that has PD can then be detected from the difference in arrival time of the acoustic signals. Test results indicate that the waveguide technique is able to enhance the safety of a measurement system and offers the advantages of easy installation and higher flexibility. Second, a specially designed AE sensor pair is used to distinguish whether acoustic signals are generated by PD inside the HV winding or by the corona outside the transformers. Using these two techniques of waveguide and AE sensor pair not only greatly improves sensitivity but also increases the reliability of the measurement system. Practical test results show that the new techniques can be used to locate precisely the PD in HV windings.
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References
ASTM E976-00, 2000. Standard Guide for Determining the Reproducibility of Acoustic Emission Sensor Response. American Society for Testing and Materials, PA, USA. [doi:10.1520/E0976-10]
Chen, J.F., Tai, C.C., Liang, T.J., Su, C.C., Yi, C.S., Chen, C.Y., 2008. High-Voltage Transformer Coil with Acoustic Wave Guiding Function. US Patent 7 339 447.
Gockenbach, E., Werle, P., Borsi, H., 2001. Monitoring and Diagnostic Systems for Dry Type Transformers. Proc. IEEE 7th Int. Conf. on Solid Dielectrics, p.291–294. [doi:10.1109/ICSD.2001.955628]
Harrold, R.T., 1979. Acoustic Waveguides for sensing and locating electrical discharges in high voltage power transformers and other apparatus. IEEE Trans. Power Appar. Syst., 98(2):449–457. [doi:10.1109/TPAS.1979. 319381]
Harrold, R.T., 1985. Acoustical technology applications in electrical insulation and dielectrics. IEEE Trans. Electr. Insul., 20(1):3–19. [doi:10.1109/TEI.1985.348751]
IEEE Std C57.124-1991. IEEE Recommended Practice for the Detection of Partial Discharge and the Measurement of Apparent Charge in Dry-Type Transformer. IEEE Power and Energy Society, New York, NY, USA.
Lamela-Rivera, H., Macia-Sanahuja, C., Garcia-Souto, J.A., 2003. Detection and wavelet analysis of partial discharges using an optical fibre interferometric sensor for high-power transformers. J. Opt. A: Pure Appl. Opt., 5(1):66–72. [doi:10.1088/1464-4258/5/1/310]
Prosser, W.H., Gorman, M.R., 1994. Accurate Simulation of Acoustic Emission Sources in Composite Plates. ASNT Spring Conf., p.1–4.
Ronald, T.H., Murrysville, P., 1979. Acoustic Waveguides for Sensing and Locating Corona Discharges. US Patent 4 158 168.
Skubis, J., 1982. Piezoelectric reflecting transducer for partial discharge acoustic signals. J. Phys. E: Sci. Instrum., 15(10):1022–1026. [doi:10.1088/0022-3735/15/10/018]
Smith, G.C., 2005. A noncontact method for detecting acoustic emission using a microwave Doppler radar motion detector. IEEE Trans. Ultras. Ferroelectr. Freq. Control, 52(9):1613–1617. [doi:10.1109/TUFFC.2005.1516035]
Su, C.C., Tai, C.C., Chen, C.Y., Hsieh, J.C., Chen, J.F., 2008. Partial Discharge Detection Using Acoustic Emission Method for a Waveguide Functional High-Voltage Cast-Resin Dry-Type Transformer. Int. Conf. on Condition Monitoring and Diagnosis, p.517–520. [doi:10. 1109/CMD.2008.4580339]
Su, C.C., Tai, C.C., Chen, C.Y., Hsieh, J.C., 2009. Partial discharge precise source location using acoustic emission method for a waveguide functional high-voltage cast-resin dry-type transformer. Int. J. Appl. Sci. Eng., 6:229–237.
TransiNor As, 2003. Diagnostic Instrument from TransiNor As, AIA-1. User’s Guide, Version 5.0.2.
Wang, X.D., Li, B.Q., Xiao, Z.X., Lee, S.H., Roman, H., Russo, O.L., Chin, K.K., Farmer, K.R., 2005. An ultra-sensitive optical MEMS sensor for partial discharge detection. J. Micromech. Microeng., 15(3):521–527. [doi:10.1088/0960-1317/15/3/012]
Werle, P., Wasserberg, V., Borsi, H., Gockenbach, E., 2000a. New Devices for a Dry Type Transformer Protection and Monitoring System. Proc. 6th Int. Conf. on Properties and Applications of Dielectric Materials, 1:567–570. [doi:10. 1109/ICPADM.2000.875757]
Werle, P., Wasserberg, V., Borsi, H., Gockenbach, E., 2000b. A New Protection and Monitoring System for Dry Type Transformers Based on Innovative Sensor Technologies. IEEE Int. Symp. on Electrical Insulation, p.255–258. [doi:10.1109/ELINSL.2000.845501]
Werle, P., Borsi, H., Gockenbach, E., 2002. Diagnosing the Insulation Condition of Dry Type Transformers Using a Multiple Sensor Partial-Discharge-Localization Technique. IEEE Int. Symp. on Electrical Insulation, p.166–169. [doi:10.1109/ELINSL.2002.995904]
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Project supported by the National Science Council, Taiwan (No. NSC 92-2622-E-006-142) and the Program of Top 100 Universities Advancement, Ministry of Education, Taiwan
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Su, Cc., Tang, Yw., Tai, Cc. et al. Detection and location of partial discharge in cast-resin dry-type transformers using a waveguide and a new acoustic emission sensor pair design. J. Zhejiang Univ. - Sci. C 12, 345–350 (2011). https://doi.org/10.1631/jzus.C1000126
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DOI: https://doi.org/10.1631/jzus.C1000126