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http://dx.doi.org/10.4313/JKEM.2012.25.10.817

Electrical Properties of Wet Bars in Water-cooled Generator Stator Windings  

Kim, Byeong-Rae (Korea Electric Power Corporation (KEPCO) Research Institute)
Kim, Hee-Dong (Korea Electric Power Corporation (KEPCO) Research Institute)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.25, no.10, 2012 , pp. 817-823 More about this Journal
Abstract
Insulation breakdown of water-cooled generator stator windings occurs frequently due to leakage of cooling water and absorption into the insulation material. Leakage and absorption problems of water-cooled stator windings are often found during regular preventive maintenance. To evaluate cooling water leakage and absorption, diagnostic tests were performed on two water-cooled turbine generators, which have been in service for 13 and 17 years, respectively. The test results of the measured electrical properties such as dissipation factor($tan{\delta}$), capacitance and AC leakage current for water-cooled generator stator windings with wet bars are reported in this paper.
Keywords
Water-cooled generator; Stator winding; Cooling water leakage; Diagnostic test; Dissipation factor; Wet bar;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 G. Griffith, S. Tucker, J. Milsom, and G. C. Stone, IEEE Electri. Insul Mag., 16, 6 (2000).
2 H. S. Kim, Y. C. Bae, W. R. Lee, D. Y. Lee, and H. D. Kim, J. of Electri. Eng. & Tech., 7, 230 (2012).   DOI
3 H. D. Kim, IEEE Int. Conf. on Solid Dielectr., 478 (2004).
4 Y. Inoue, H. Hasegawa, S. Sekito, M. Sotodate, H. S, and T. Okamoto, IEEE Int. Electr. Machines and Drives Conf., 1337 (2003).
5 J. E. Timperley and J. R. Michalec, IEEE/Electri. Insul. Conf., 439 (2003).
6 H. D. Kim, J. KIEEME, 15, 119 (2002).