• 대한전기학회
Mobile QR Code QR CODE : The Transactions of the Korean Institute of Electrical Engineers
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  • kcse
  • 한국과학기술단체총연합회
  • 한국학술지인용색인
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Title A study on the heat cycle aging of insulation materials in large generator stator windings
Authors 김희곤 ; 박영관
Page pp.553-557
ISSN 1975-8359
Keywords High-voltage ; insulation material ; stator winding ; deterioration ; rotation machine ; voltage endurance ; heat cycle
Abstract Heat cycle aging of insulating materials in large generator stator winding has been investigated using both on-line and off-line test methods. On this study, principally, off-line test against actual generator in service was carried out to acquire information about polarization index(PI) and dissipation factor, dissipation factor tip-up, maximum partial discharge for the purpose of remnant breakdown voltage and life assessment. It was found from the tests that both dissipation factor and maximum partial discharge decreased with the increase of operating hours and starting numbers. It was found from off-line tests that the remnant breakdown voltage had a strong relationship with both dissipation factor and maximum partial discharge the remnant breakdown voltage as a results of both operating hours and starting number and the nondestructive tests were proposed as parameters which can predict the remnant lifetime of insulating materials in large generator stator windings. (author). 8 refs., 8 figs., 2 tabs.