Dépouillements

A comparison of the voltage withstand properties of ester and mineral oils / Azcarraga, C. G. in IEEE electrical insulation magazine, Vol. 30 N° 5 (Septembre-Octobre 2014) 

Public ISBD [article]  in IEEE electrical insulation magazine > Vol. 30 N° 5 (Septembre-Octobre 2014) . - pp. 6 - 14 Titre : A comparison of the voltage withstand properties of ester and mineral oils Type de document : texte imprimé Auteurs : Azcarraga, C. G., Auteur ; Alberto Cavallini, Auteur ; Piovan, U., Auteur Année de publication : 2015 Article en page(s) : pp. 6 - 14 Note générale : Génie électrique Langues : Français (fre) Mots-clés : Corona  Minerals  Permittivity  Power  transformer  insulation  Transformer  oil Résumé : EO has proved to be a viable substitute for MO. Its dielectric performance is always comparable with, if not superior to that of MO, at least when new, dried, and highly purified. The smaller permittivity mismatch between pressboard and EO, compared to that between pressboard and MO, leads to a more uniform field distribution at the oil/pressboard interface. We have observed that EO has higher PDIVs than MO for corona and creepage discharges. However, our understanding of the oil/pressboard interface is incomplete. There is a lack of standardization in PDIV measurements, particularly in the case of creepage discharges. Because industry is striving to provide new insulating oils for use at increased transmission voltages, improving electrical testing techniques and the understanding of the oil/pressboard interface is important. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6882595&filter%3DAND% [...] [article] A comparison of the voltage withstand properties of ester and mineral oils [texte imprimé] / Azcarraga, C. G., Auteur ; Alberto Cavallini, Auteur ; Piovan, U., Auteur . - 2015 . - pp. 6 - 14. Génie électrique Langues : Français (fre) in IEEE electrical insulation magazine > Vol. 30 N° 5 (Septembre-Octobre 2014) . - pp. 6 - 14 Mots-clés : Corona  Minerals  Permittivity  Power  transformer  insulation  Transformer  oil Résumé : EO has proved to be a viable substitute for MO. Its dielectric performance is always comparable with, if not superior to that of MO, at least when new, dried, and highly purified. The smaller permittivity mismatch between pressboard and EO, compared to that between pressboard and MO, leads to a more uniform field distribution at the oil/pressboard interface. We have observed that EO has higher PDIVs than MO for corona and creepage discharges. However, our understanding of the oil/pressboard interface is incomplete. There is a lack of standardization in PDIV measurements, particularly in the case of creepage discharges. Because industry is striving to provide new insulating oils for use at increased transmission voltages, improving electrical testing techniques and the understanding of the oil/pressboard interface is important. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6882595&filter%3DAND% [...]

Using a sensitive optical system to analyze gases dissolved in samples extracted from transformer oil / Fu Wan in IEEE electrical insulation magazine, Vol. 30 N° 5 (Septembre-Octobre 2014) 

Public ISBD [article]  in IEEE electrical insulation magazine > Vol. 30 N° 5 (Septembre-Octobre 2014) . - pp. 15 - 22 Titre : Using a sensitive optical system to analyze gases dissolved in samples extracted from transformer oil Type de document : texte imprimé Auteurs : Fu Wan, Auteur ; Qu Zhou, Auteur ; Jingxin Zou, Auteur Année de publication : 2015 Article en page(s) : pp. 15 - 22 Note générale : Génie électrique Langues : Français (fre) Mots-clés : Chemical  variables  measurement  Fault  diagnosis  Infrared  spectroscopy  Measurement  by  laser  beam  Transformer  oil Résumé : A sensitive optical system which can be used to measure accurately the concentrations of fault gases dissolved in samples extracted from transformer oil is described, and some test results are presented. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6882596&filter%3DAND% [...] [article] Using a sensitive optical system to analyze gases dissolved in samples extracted from transformer oil [texte imprimé] / Fu Wan, Auteur ; Qu Zhou, Auteur ; Jingxin Zou, Auteur . - 2015 . - pp. 15 - 22. Génie électrique Langues : Français (fre) in IEEE electrical insulation magazine > Vol. 30 N° 5 (Septembre-Octobre 2014) . - pp. 15 - 22 Mots-clés : Chemical  variables  measurement  Fault  diagnosis  Infrared  spectroscopy  Measurement  by  laser  beam  Transformer  oil Résumé : A sensitive optical system which can be used to measure accurately the concentrations of fault gases dissolved in samples extracted from transformer oil is described, and some test results are presented. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6882596&filter%3DAND% [...]

Recent progress in nanofluids based on transformer oil: preparation and electrical insulation properties / Lv, Y. Z. in IEEE electrical insulation magazine, Vol. 30 N° 5 (Septembre-Octobre 2014) 

Public ISBD [article]  in IEEE electrical insulation magazine > Vol. 30 N° 5 (Septembre-Octobre 2014) . - pp. 23 - 32 Titre : Recent progress in nanofluids based on transformer oil: preparation and electrical insulation properties Type de document : texte imprimé Auteurs : Lv, Y. Z., Auteur ; Y. Zhou, Auteur ; Li, C. R., Auteur Année de publication : 2015 Article en page(s) : pp. 23 - 32 Note générale : Génie électrique Langues : Français (fre) Mots-clés : Electric  strength  Paper  Power  transformers  Reliability  Transformer  oil Résumé : Given the adoption of ultrahigh-voltage ac and dc power transmission, it is desirable to develop a new kind of oil-paper insulation system, with higher dielectric strength and smaller volume compared with conventional insulation systems, in order to reduce the volume and mass of high-voltage power transformers and improve their long-term operational reliability [1], [2]. Methods of improving the dielectric properties of the oil-paper insulation have therefore been widely investigated [3], [4]. The most influential factors affecting the performance of oil-paper insulation systems are the low dielectric strength of transformer oil and its degradation caused by water and other contaminants [5]. The dielectric strength of oil-paper insulation may be increased by filtering the oil in order to remove water and other contaminants [6]. However, further increase in the dielectric strength of the oil is required in order to achieve reduction of transformer volume and mass. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6882597&filter%3DAND% [...] [article] Recent progress in nanofluids based on transformer oil: preparation and electrical insulation properties [texte imprimé] / Lv, Y. Z., Auteur ; Y. Zhou, Auteur ; Li, C. R., Auteur . - 2015 . - pp. 23 - 32. Génie électrique Langues : Français (fre) in IEEE electrical insulation magazine > Vol. 30 N° 5 (Septembre-Octobre 2014) . - pp. 23 - 32 Mots-clés : Electric  strength  Paper  Power  transformers  Reliability  Transformer  oil Résumé : Given the adoption of ultrahigh-voltage ac and dc power transmission, it is desirable to develop a new kind of oil-paper insulation system, with higher dielectric strength and smaller volume compared with conventional insulation systems, in order to reduce the volume and mass of high-voltage power transformers and improve their long-term operational reliability [1], [2]. Methods of improving the dielectric properties of the oil-paper insulation have therefore been widely investigated [3], [4]. The most influential factors affecting the performance of oil-paper insulation systems are the low dielectric strength of transformer oil and its degradation caused by water and other contaminants [5]. The dielectric strength of oil-paper insulation may be increased by filtering the oil in order to remove water and other contaminants [6]. However, further increase in the dielectric strength of the oil is required in order to achieve reduction of transformer volume and mass. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6882597&filter%3DAND% [...]

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