1. Early stage detection of insulating oil decaying
- Author
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Abderrahmane Beroual, Issouf Fofana, Yazid Hadjadj, A. Bouaicha, J. S. N'Cho, T. Aka-Ngnui, Isolants Liquides et Mixtes en Electrotechnologie (ISOLIME), Université du Québec à Chicoutimi (UQAC), Ampère (AMPERE), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
- Subjects
010302 applied physics ,Materials science ,Oil analysis ,Dielectric strength ,Waste management ,Transformer oil ,020209 energy ,[SPI.NRJ]Engineering Sciences [physics]/Electric power ,Condition monitoring ,Thermal aging ,02 engineering and technology ,01 natural sciences ,law.invention ,Surface tension ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Total acid ,Composite material ,Transformer - Abstract
International audience; It is an established fact that regular oil analysis is extremely useful in monitoring the condition of power transformers. To ensure long-term reliability of oil filled power transformers, it is important to identify the degradation characteristics of insulating oil in long-term operations, which are the dominant factors of the transformer dielectric strength. In this contribution, oil decaying was monitored with various ASTM test methods. Oil samples were submitted to thermal aging with oxygen inlet in laboratory conditions. Many key parameters providing a "picture" of the fluid have been determined. From the obtained results, some correlations were found between some of them. Dissolved decay products, which change with a higher rate than interfacial tension and total acid values, can be possibly used as an effective index for insulating oil degradation.
- Published
- 2010
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