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http://dx.doi.org/10.4313/JKEM.2007.20.7.645

Analysis of Parameters on Partial Discharges from Insulation Defects of used Hydro Generator Stator Windings  

Oh, Bong-Keun (한국수자원공사 수자원연구원)
Kim, Hyun-Il (한국수자원공사 수자원연구원)
Kang, Seong-Hwa (충청대학 소방안전과)
Lim, Kee-Joe (충북대학교 전기전자컴퓨터공학부)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.20, no.7, 2007 , pp. 645-649 More about this Journal
Abstract
Partial discharge(PD) test for simulated insulation defects of used hydro generator stator winding was conducted to analyze the PD Parameters. Simulated insulation defects are classified by 5 types corona, slot, internal, multi and aging defect. Phase resolved partial discharge, statistical parameter (skewness, kurtosis), PD magnitude as a function of the test voltage(Q-V curve) and PD magnitude change under test voltage for 2 minutes are used as PD parameters. The analysis of PD parameters by 4 types are proved to be useful methods. In particular, PD parameter characteristics of aging defect could help to assess the aging condition of stator winding because aging defect has more weak insulation strength than other insulation defects : PD distribution is wide and flat, PD rises rapidly near $0^{\circ}\;and\;180^{\circ}$ and Q-V curve rises sharply and then gently drops.
Keywords
PD; Insulation defect; Hydro generator; Stator winding; Q-V curve;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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