System and method of reducing harmonic effects on a power...

H - Electricity – 02 – M

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H02M 5/458 (2006.01) H02M 7/49 (2007.01) H02M 1/12 (2006.01)

Patent

CA 2620498

A power delivery system, and a method for operating it includes a plurality of power cells that are electrically connected to a multi-winding machine comprising one or more primary windings and a plurality of secondary windings such that each cell is electrically connected to one of the secondary windings and a plurality of the secondary windings are phase-shifted with respect to the primary windings. The method includes determining, for each cell in a set of the power cells, a carrier offset angle, and synchronizing, by the each cell in the set, a carrier signal to the secondary voltage for the cell based on the carrier offset angle determined for the cell. The carrier signal for each cell controls the timing of operation of switching devices within the cell.

Selon l'invention, un système de distribution d'électricité et son procédé de fonctionnement comprennent une multitude de cellules de courant connectées électriquement à une machine à plusieurs enroulements comportant au moins un enroulement primaire et une multitude d'enroulements secondaires, de telle manière que chaque cellule est connectée électriquement à un des enroulements secondaires et une multitude des enroulements secondaires sont déphasés en fonction des enroulements primaires. Ce procédé consiste à déterminer, pour chaque cellule dans un ensemble des cellules de courant, un angle de décalage de porteuse et à synchroniser au moyen de chaque cellule dudit ensemble, un signal de porteuse avec la tension secondaire destinée à la cellule, en fonction de l'angle de décalage de porteuse déterminé pour la cellule. Ledit signal de porteuse pour chaque cellule permet de commander la synchronisation de fonctionnement des dispositifs de commutation au sein de la cellule.

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