Numerical and experimental analysis of the aging impact on the cooling capacity of a natural ester-based oil used in power transformers

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URI: http://hdl.handle.net/10902/17236
ISBN: 978-1-5386-5087-5
ISBN: 978-1-5386-5086-8
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Autoría
Ortiz Fernández, AlfredoAutoridad Unican; Delgado San Román, FernandoAutoridad Unican; Ortiz Fernández, FélixAutoridad Unican; Fernández Diego, InmaculadaAutoridad Unican; Santisteban Díaz, AgustínAutoridad Unican
Fecha
2018
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© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
IEEE International Conference on High Voltage Engineering and Application (ICHVE), Athens, 2018, 845-848
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IEEE
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Resumen/Abstract
An experimental and numerical research was conducted to study the aging effect on the cooling performance of a natural ester-based oil habitually used in power transformers. A monitored experimental platform has been used to observe the temperature increases with the aging of the insulation system (oil and paper). Three samples with three aging levels were tested at three load levels: underload, rated and overload regimes. The two aged samples (6 liters each) were aged in an accelerated way within an oven: 1 week at 150°C. Also, some physicochemical properties of the insulation system (paper and oil) were determined. A 2D numerical model has been developed with COMSOL Multiphysics to determine the temperature and velocity distributions of the different samples in the platform to analyze their differences and to compare their cooling capacity. At first sight, the aging affects negatively to the cooling capacity of the new alternative liquid based on natural esters.
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