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50 years in the development of insulating liquids

Fofana Issouf. (2013). 50 years in the development of insulating liquids. IEEE Electrical Insulation Magazine, 29, (5), p. 13-25.

Le texte intégral n'est pas disponible pour ce document.

URL officielle: http://dx.doi.org/doi:10.1109/MEI.2013.6585853

Résumé

The role of electrical insulation is critical for the proper operation of electrical equipment. Power equipment cannot operate without energy losses, which lead to rises in temperature. It is therefore essential to dissipate the heat generated by the energy losses, especially under high load conditions. Failing to do so results in premature aging, and ultimately to failure of the equipment. Heat dissipation can be achieved by circulating certain liquids, which also ensure electrical insulation of energized conductors. The insulating-fluids market is therefore likely to be dominated by liquids, leaving to gases (such as compressed air and SF6) limited applications in power equipment such as circuit breakers and switchgear [1]-[3]. Several billion liters of insulating liquids are used worldwide in power equipment such as transformers (power, rectifier, distribution, traction, furnace, potential, current) [4], resistors [5], reactors [6], capacitors [7], cables [8], bushings [9], circuit breakers [10], tap changers [11], thyristor cooling in power electronics, etc. [12]. In addition to their main functions of protecting solid insulation, quenching arc discharges, and dissipating heat, insulating liquids can also act as acoustic dampening media in power equipment such as transformers. More importantly, they provide a convenient means of routine evaluation of the condition of electrical equipment over its service life. Indeed, liquids play a vital role in maintaining the equipment in good condition (like blood in the human body). In particular they are responsible for the functional serviceability of the dielectric (insulation) system, the condition of which can be a decisive factor in determining the life span of the equipment [13]. Testing the physicochemical and electrical properties of the liquids can provide information on incipient electrical and mechanical failures. In some equipment, liquid samples can be obtained without service interruption.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:29
Numéro:5
Pages:p. 13-25
Version évaluée par les pairs:Oui
Date:29 Août 2013
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie électrique et génie électronique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:dielectric liquids, liquids, minerals, oil insulation, power transformer insulation, oils, hydrocarbons, dielectric coolant, mineral oil, vegetable oil, ester, silicone liquid, liquid-filled equipment, liquides diélectriques, liquides, minéraux, isolation d'huile, isolation de transformateur de puissance, huiles, hydrocarbures
Déposé le:17 févr. 2021 20:00
Dernière modification:17 févr. 2021 20:00
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