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Ajouter le résultat dans votre panierHigh-voltage testing fundamentals / Czaszejko, T. in IEEE electrical insulation magazine, Vol. 30 N° 1 (Janvier-Février 2014)
Titre : High-voltage testing fundamentals : a cable testing perspective Type de document : texte imprimé Auteurs : Czaszejko, T., Auteur Année de publication : 2015 Article en page(s) : pp. 7 - 13 Note générale : Génie électrique Langues : Français (fre) Mots-clés : Cable system High-voltage testing Insulation lifeline Power cable Résumé : An ever-increasing appetite for electrical energy by industrial, commercial, and household consumers has resulted in a continuously growing demand for transmission capacity and improved reliability of elecricity supply. The reliability of a HV power plant must be maintained at a high level over its lifetime, typically 50 years. All newly manufactured components of electricity networks undergo various types of tests to ensure their reliability and longevity. The tests follow specifications set out in national and international standards. These tests could be described in general terms as: design-verification tests,; production-quality tests, and ; tests after installation. Of all systems in a HV plant, cable systems must satisfy possibly the widest range of test requirements. So in this article we use electrical testing of cable systems to show the origins of the main test specifications. Although we refer throughout the paper mainly to cables with extruded insulation and their accessories, most of the discussion can be generalized to other HV equipment such as power transformers or insulators. We limit our discussion to insulated cable systems built to transmit electrical power in bulk at the subtransmission and transmission voltage levels, i.e., those rated above 30 kV. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701102&filter%3DAND% [...]
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 7 - 13[article] High-voltage testing fundamentals : a cable testing perspective [texte imprimé] / Czaszejko, T., Auteur . - 2015 . - pp. 7 - 13.
Génie électrique
Langues : Français (fre)
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 7 - 13
Mots-clés : Cable system High-voltage testing Insulation lifeline Power cable Résumé : An ever-increasing appetite for electrical energy by industrial, commercial, and household consumers has resulted in a continuously growing demand for transmission capacity and improved reliability of elecricity supply. The reliability of a HV power plant must be maintained at a high level over its lifetime, typically 50 years. All newly manufactured components of electricity networks undergo various types of tests to ensure their reliability and longevity. The tests follow specifications set out in national and international standards. These tests could be described in general terms as: design-verification tests,; production-quality tests, and ; tests after installation. Of all systems in a HV plant, cable systems must satisfy possibly the widest range of test requirements. So in this article we use electrical testing of cable systems to show the origins of the main test specifications. Although we refer throughout the paper mainly to cables with extruded insulation and their accessories, most of the discussion can be generalized to other HV equipment such as power transformers or insulators. We limit our discussion to insulated cable systems built to transmit electrical power in bulk at the subtransmission and transmission voltage levels, i.e., those rated above 30 kV. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701102&filter%3DAND% [...] Exemplaires
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Titre : 50 years in icing performance of outdoor insulators Type de document : texte imprimé Auteurs : Farzaneh, M., Auteur ; Chisholm, W., Auteur Année de publication : 2015 Article en page(s) : pp. 14 - 24 Note générale : Génie électrique Langues : Français (fre) Mots-clés : Bushings Freezing IceInsulator testing Substations Résumé : During the last 50 years a significant technical advance, namely in our understanding and control of switching-surge overvoltages, has had some unintended and adverse consequences when designers took full advantage of the possibility of reduced insulator dimensions. Glaze ice accretion can produce harmful effects, especially on closely spaced or large-diameter station post insulators and bushings. Partial or full bridging of the leakage distance occurs for moderate ice-accretion levels and reduces insulator reliability during melting in saturated conditions. Colocation of HV or EHV substations with roads or expressways on which deicing salt is spread has proved particularly problematic. The DEIS has played an important role as a forum for exploring icing flashover physics and as a sponsor of improved test methods and applications guidance. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701103&filter%3DAND% [...]
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 14 - 24[article] 50 years in icing performance of outdoor insulators [texte imprimé] / Farzaneh, M., Auteur ; Chisholm, W., Auteur . - 2015 . - pp. 14 - 24.
Génie électrique
Langues : Français (fre)
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 14 - 24
Mots-clés : Bushings Freezing IceInsulator testing Substations Résumé : During the last 50 years a significant technical advance, namely in our understanding and control of switching-surge overvoltages, has had some unintended and adverse consequences when designers took full advantage of the possibility of reduced insulator dimensions. Glaze ice accretion can produce harmful effects, especially on closely spaced or large-diameter station post insulators and bushings. Partial or full bridging of the leakage distance occurs for moderate ice-accretion levels and reduces insulator reliability during melting in saturated conditions. Colocation of HV or EHV substations with roads or expressways on which deicing salt is spread has proved particularly problematic. The DEIS has played an important role as a forum for exploring icing flashover physics and as a sponsor of improved test methods and applications guidance. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701103&filter%3DAND% [...] Exemplaires
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Titre : 50+ Years of impedance measurement and spectroscopy, and implementation of virtual spectroscopy based on finite element analysis Type de document : texte imprimé Auteurs : Shilei Ma, Auteur ; Boggs, S., Auteur Année de publication : 2015 Article en page(s) : pp. 25 - 31 Note générale : Génie électrique Langues : Français (fre) Mots-clés : Dielectric measurement Electric impedance Finite element analysis Résumé : Impedance spectroscopy of dielectrics has a long history, going back to Heaviside. Modern multiphysics finite element analysis packages allow dielectric spectra to be computed from detailed physical models for comparison with measurements. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701104&filter%3DAND% [...]
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 25 - 31[article] 50+ Years of impedance measurement and spectroscopy, and implementation of virtual spectroscopy based on finite element analysis [texte imprimé] / Shilei Ma, Auteur ; Boggs, S., Auteur . - 2015 . - pp. 25 - 31.
Génie électrique
Langues : Français (fre)
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 25 - 31
Mots-clés : Dielectric measurement Electric impedance Finite element analysis Résumé : Impedance spectroscopy of dielectrics has a long history, going back to Heaviside. Modern multiphysics finite element analysis packages allow dielectric spectra to be computed from detailed physical models for comparison with measurements. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701104&filter%3DAND% [...] Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Condition-based maintenance of high-voltage machines : a practical application to electrical insulation Type de document : texte imprimé Auteurs : Trnka, P., Auteur ; Sirucek, M., Auteur ; Svoboda, M., Auteur Année de publication : 2015 Article en page(s) : pp. 32 - 38 Note générale : Génie électrique Langues : Français (fre) Mots-clés : Ageing Condition monitoring Electrical maintenance Electricity supply industry Machine insulation Remaining life assessment Résumé : Electric-power machines such as generators, large rotary machines, and transformers play an important role in electrical energy delivery. Since the beginning of electrical-energy distribution to consumers, offline diagnostics of these important machines has been performed. In time-based maintenance that is based on offline diagnostics, diagnosis is carried out regular intervals, followed by maintenance or repair as required. Personnel have to be transported to the site to perform the measurements. Currently, online diagnosis is being used important electric equipment around the globe; measurements are performed continuously, which helps minimize the number of faults and therefore network outages. The data collected the diagnostic system, e.g., voltage, current, or temperature, are sent via a computer network to the supervisory service. In this paper, the authors describe a system that uses data from online diagnostic systems to calculate the remaining lifetime of an electrical insulation system. The paper also presents experimental accelerated aging data and use them as input data for remaining-lifetime calculations. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701105&filter%3DAND% [...]
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 32 - 38[article] Condition-based maintenance of high-voltage machines : a practical application to electrical insulation [texte imprimé] / Trnka, P., Auteur ; Sirucek, M., Auteur ; Svoboda, M., Auteur . - 2015 . - pp. 32 - 38.
Génie électrique
Langues : Français (fre)
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 32 - 38
Mots-clés : Ageing Condition monitoring Electrical maintenance Electricity supply industry Machine insulation Remaining life assessment Résumé : Electric-power machines such as generators, large rotary machines, and transformers play an important role in electrical energy delivery. Since the beginning of electrical-energy distribution to consumers, offline diagnostics of these important machines has been performed. In time-based maintenance that is based on offline diagnostics, diagnosis is carried out regular intervals, followed by maintenance or repair as required. Personnel have to be transported to the site to perform the measurements. Currently, online diagnosis is being used important electric equipment around the globe; measurements are performed continuously, which helps minimize the number of faults and therefore network outages. The data collected the diagnostic system, e.g., voltage, current, or temperature, are sent via a computer network to the supervisory service. In this paper, the authors describe a system that uses data from online diagnostic systems to calculate the remaining lifetime of an electrical insulation system. The paper also presents experimental accelerated aging data and use them as input data for remaining-lifetime calculations. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701105&filter%3DAND% [...] Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Thermal analysis of two transformers filled with different oils Type de document : texte imprimé Auteurs : Martin, D., Auteur ; Wijaya, J., Auteur ; Lelekakis, N., Auteur Année de publication : 2015 Article en page(s) : pp. 39 - 45 Note générale : Génie électrique Langues : Français (fre) Mots-clés : Organic compounds Thermal analysis Transformer oil Résumé : In this article the authors present the results of their studies comparing the thermal performance of two nominally identical transformers, one filled with standard mineral oil and the other with natural ester Envirotemp FR3 oil. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701106&filter%3DAND% [...]
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 39 - 45[article] Thermal analysis of two transformers filled with different oils [texte imprimé] / Martin, D., Auteur ; Wijaya, J., Auteur ; Lelekakis, N., Auteur . - 2015 . - pp. 39 - 45.
Génie électrique
Langues : Français (fre)
in IEEE electrical insulation magazine > Vol. 30 N° 1 (Janvier-Février 2014) . - pp. 39 - 45
Mots-clés : Organic compounds Thermal analysis Transformer oil Résumé : In this article the authors present the results of their studies comparing the thermal performance of two nominally identical transformers, one filled with standard mineral oil and the other with natural ester Envirotemp FR3 oil. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6701106&filter%3DAND% [...] Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
