Method and control arrangement for dc transmission, and a...

H - Electricity – 02 – J

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H02J 3/36 (2006.01) G05F 1/66 (2006.01) H02M 7/757 (2006.01)

Patent

CA 2158360

In order to permit an improved operational performance of DC transmission, a method is provided which has an associated control arrangement and control device (11a, 11b) and in which, starting from a common working point (A) with prescribable current and voltage values (UA, IA) the respective control devices (11a, 11b) of converters (5a, 5b) respectively assigned to three- phase systems (3a, 3b) are respectively fed system deviations (.DELTA.Aa, .DELTA.Ab) relative to the working point (A). The respective controlled variable is followed up in order to reach the working point (A), minimizing the respective system deviation (.DELTA.Aa, .DELTA.Ab). The control method and the associated devices preferably operate according to the principle of vectorial control.

Méthode pour améliorer l'efficacité du transport de courant continu au moyen d'un circuit de commande et d'un dispositif de commande (11a, 11b). € partir d'un point de fonctionnement commun (A) associé à des valeurs de courant et de tension prédéterminées (UA, IA), les dispositifs de commande respectifs (11a, 11b) de convertisseurs (5a, 5b) affectés respectivement aux systèmes triphasés (3a, 3b) sont décalés de certains écarts (.DELTA.Aa, .DELTA.Ab) par rapport au point de fonctionnement (A). La variable commandée respective est suivie afin d'atteindre le point de fonctionnement (A), ce qui réduit au minimum l'écart respectif (.DELTA.Aa, .DELTA.Ab). La méthode de commande et les dispositifs associés respectent de préférence le principe du contrôle vectoriel.

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