Publication

Supercondensateurs et stockage d'énergie

Alfred Rufer
2003
Journal Articles

Abstract

Un circuit d’électronique de puissance a été étudié, dans le but d’interfacer un banc de stockage d’énergie à base de supercondensateurs avec la caténaire d’alimentation d’un réseau de trolleybus. L’installation a été conçue de manière à pouvoir agir comme compensateur actif de chutes de tension, aux endroits où un tel réseau présente une sensibilité importante. Un convertisseur statique à circuit intermédiaire permet d’injecter de l’énergie en mode de fonctionnement en source de courant, indépendamment de l’état de tension de la ligne ou de l’état de stockage du banc accumulateur. Un circuit de réglage spécifique est également proposé et permet la régulation du niveau de tension au point d’interconnexion sur une valeur constante. Les résultats obtenus par simulation ont pu être vérifiés en pratique, grâce à la réalisation d’un modèle réel à puissance réduite.

Official source

https://infoscience.epfl.ch/entities/publication/35c914db-67f6-48da-8147-a11015c41e90

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Alfred Rufer
2003
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/35c914db-67f6-48da-8147-a11015c41e90

About this result

Related concepts (2)

Injective sheaf

In mathematics, injective sheaves of abelian groups are used to construct the resolutions needed to define sheaf cohomology (and other derived functors, such as sheaf Ext). There is a further group of related concepts applied to sheaves: flabby (flasque in French), fine, soft (mou in French), acyclic. In the history of the subject they were introduced before the 1957 "Tohoku paper" of Alexander Grothendieck, which showed that the notion of injective object sufficed to found the theory.

De Rham cohomology

In mathematics, de Rham cohomology (named after Georges de Rham) is a tool belonging both to algebraic topology and to differential topology, capable of expressing basic topological information about smooth manifolds in a form particularly adapted to computation and the concrete representation of cohomology classes. It is a cohomology theory based on the existence of differential forms with prescribed properties. On any smooth manifold, every exact form is closed, but the converse may fail to hold.