Analysis of Partial Discharge Patterns for Generator Stator Windings
American Journal of Electrical Power and Energy Systems
Volume 4, Issue 2, March 2015, Pages: 17-22
Received: Feb. 16, 2015; Accepted: Mar. 4, 2015; Published: Mar. 12, 2015
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Authors
Tae-Sik Kong, Korea Electric Power Corporation (KEPCO) Research Institute, Daejeon, South Korea
Hee-Dong Kim, Korea Electric Power Corporation (KEPCO) Research Institute, Daejeon, South Korea
Tae-Sung Park, Korea Electric Power Corporation (KEPCO) Research Institute, Daejeon, South Korea
Kyeong-Yeol Kim, Korea Electric Power Corporation (KEPCO) Research Institute, Daejeon, South Korea
Ho-Yol Kim, Korea Electric Power Corporation (KEPCO) Research Institute, Daejeon, South Korea
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Abstract
Forced outage of generators due to stator winding insulation failure can result in significant financial loss because of the high cost repair and loss of production. In recent years, the demand for insulation diagnosis is increasing to prevent unexpected failures, as the capacity of generators has increased. Insulation diagnosis is composed of the insulation resistance measurement, polarization index measurement, dissipation factor (DF) tip-up test, AC current increasing ratio measurement, and the partial discharge (PD) measurement. In this paper, the results of the PD measurement and PD pulse pattern analysis performed on a healthy generator and two generators that experienced dielectric breakdown failure during operation is presented.
Keywords
Generator, Stator Winding, Insulation Failure, PD Pattern, AC Current, Dissipation Factor
To cite this article
Tae-Sik Kong, Hee-Dong Kim, Tae-Sung Park, Kyeong-Yeol Kim, Ho-Yol Kim, Analysis of Partial Discharge Patterns for Generator Stator Windings, American Journal of Electrical Power and Energy Systems. Vol. 4, No. 2, 2015, pp. 17-22. doi: 10.11648/j.epes.20150402.11
References
[1]
Hee-Dong Kim, "Analysis of Insulation Aging Mechanism in Generator Stator Windings", Journal of the KIEEME, Vol. 15, No2, pp. 119-126, 2002.
[2]
R. Morin, R. Bartnikas and P. Menard, “A Three-Phase Multi-Stress Accelerated Electrical Aging Test Facility for Stator Bars”, IEEE Trans. on Electrical Conversion, Vol. 15, No. 2, pp. 149 ~ 156, 2000.
[3]
H. Zhu, C. Morton and S. Cherukupalli, "Quality Evaluation of Stator Coils and Bars under Thermal Cycling Stress", Conference Record of the 2006 IEEE International Symposium on Electrical Insulation, pp. 384~387, 2006.
[4]
H. G. Sedding, R. Schwabe, D. Levin, J. Stein and B. K. Gupta, "The Role AC & DC Hipot Testing in Stator Winding Ageing", IEEE Electrical Insulation and Electrical Manufacturing & Coil Winding Conference, pp. 455~457, 2003.
[5]
“Recommended Practice for Insulation Testing of Large AC Rotating Machinery with High direct Voltage", New York : Institute of Electrical and Electronics Engineers, IEEE+ Std. 95-1977, pp. 13, 1977.
[6]
IEEE Standard "IEEE Guide for Insulation Maintenance of Large Alternating-Current Rotating Machinery (10,000kVA and Larger)" IEEE Std 56-1997, pp. 12, 1997.
[7]
Hee-Dong Kim, Tae-Sik Kong, Young-Ho Ju, Byong-Han Kim "Analysis of Insulation Quality in Large Generator Stator Windings", Journal of Electrical Engineering & Technology Vol. 6, No. 2, pp. 384-390, 2011.
[8]
Claude Hudon and Mario Belec, "PD Signal Interpretation for Generator Diagnostics", IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 12, No. 2, pp. 297~319, 2005.
[9]
Y. Ikeda and H. Fukagawa, “"A Method for Diagnosing the Insulation Deterioration in Mica-Resin Insulated Stator Windings of Generator”", Yokosuka Research Laboratory Rep. No. W88046, 1988
[10]
IEEE Standard "Trial-Use Guide to the Measurement of Partial Discharge in Rotaing Machinery", IEEE Std 1434-2000, pp. 40, 2000
[11]
H. Yoshida and U. Umemoto, "Insulation Diagnosis for Rotating Machine Insulation", IEEE Trans. on Electric Insulation, Vol. EI-21, No. 6, pp. 1021-1025, 1986
[12]
J.H. Dymond, N. Stranges, K. Younsi and J. E. Hayward, "Stator Winding Failures : Contamination, Surface Discharge, Tracking", IEEE Trans. on Industry Applications, Vol. 38, No. 2, pp. 577-583, 2002.
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