대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2006년도 제37회 하계학술대회 논문집 전기설비
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- Pages.51-52
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- 2006
회전자 고정자권선의 절연보수후 절연특성변화 연구
Change of the Insulation Characteristic for the Rotating machine stator winding after insulation reinforcement
- Oh, Bong-Keun (Korea Water Resources Corporation) ;
- Choi, Kyo-Nam (Korea Water Resources Corporation) ;
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Choi, Hyung-Cheol
(Korea Water Resources Corporation) ;
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Lim, Kee-Joe
(Chungbuk National University)
- 발행 : 2006.07.12
초록
Our company(KOWACO) has periodically performed off-line diagnostic test for 14 hydro generators (rated 11 kV over) for 15 years. In this paper, we summarized results of dissipation factor tip-up test and partial discharge test about these generators. Among these, we chose two generators and performed insulation reinforcement (cleaning and varnish painting). We compared change of insulation condition for the stator winding based upon off-line diagnostic test result before and after repair. Test result shows that insulation condition was improved after insulation reinforcement. This insulation reinforcement has a function to reduce cause of deterioration, so we can know that it extends lifetime of generator and it is a very important factor for stable operation of facilities.
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