| Title |
Characteristics of Insulation Aging in Large Generator Stator Windings |
| Authors |
김희동(Kim, Hee-Dong) ; 이영준(Lee, Young-Jun) ; 주영호(Ju, Young-Ho) |
| Keywords |
Accelerated aging ; Generator ; Stator bar ; Aging time ; Dissipation factor ; Partial discharge |
| Abstract |
Insulation tests have been performed on two generator stator bars under accelerated aging under a laboratory environment. Electrical stress was applied to stator bar No.1, and electrical and thermal stresses were applied to stator bar No.2. Nondestructive stator insulation tests including the ac current, dissipation factor(tanδ), and partial discharge tests have been performed on both bars as the bars were aged for 11460 hours. Experimental test results show that δI, δtanδ, and partial discharge of No. 1 and No.2 stator bars increased with increased in aging time. It has been concluded from the test that the stator insulation of the two generators are in good condition. |