1. Comparative study of streamer phenomena in mineral, synthetic and natural ester oils under lightning impulse voltage
- Author
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Viet-Hung Dang, Christophe Perrier, A. Beroual, 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), 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), AREVA T and D, Technology and Innovation Center, and Groupe AREVA
- Subjects
010302 applied physics ,Sessile drop ,Materials science ,Dielectric strength ,Petroleum engineering ,Polarity (physics) ,outdoor insulation ,020209 energy ,[SPI.NRJ]Engineering Sciences [physics]/Electric power ,Polarity symbols ,Analytical chemistry ,Field strength ,02 engineering and technology ,current discharges ,01 natural sciences ,Electric charge ,drop distortion ,Threshold voltage ,field strength ,0103 physical sciences ,Lightning impulse voltage ,0202 electrical engineering, electronic engineering, information engineering ,partial discharges ,Voltage - Abstract
International audience; This paper presents the experimental results of a comparative study of mineral oils, synthetic ester oil and natural ester oils (vegetable oils) issued from different origins through the analyse of the initiation threshold voltage of streamers, their pattern and their stopping length (final length) Lf as well as the associated current and electrical charge, in a point - plane electrode arrangement submitted to a lightning impulse voltage (1.2/50 µs). It's shown that the streamers are filamentary in the different tested oils whatever the polarity of voltage. Lf is longer when the point is positive than when it's negative whatever the oil. It's is generally longer in ester oils (natural and synthetic) than in some mineral oils. When the point is negative, Lf can be ten times higher in ester oils than in mineral ones. Basing on the stopping length of streamers, the positive polarity appears as the most unfavorable one for industrial applications and the dielectric strength of mineral oils we tested are generally better (in the considered experimental conditions) than that of ester oils.
- Published
- 2010
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