Control apparatus for a converter for transmitting electric...

H - Electricity – 02 – J

Patent

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H02J 5/00 (2006.01) H02M 7/757 (2006.01) H02M 1/00 (2006.01)

Patent

CA 2219255

A plant for transmitting electric power between a direct voltage network and an alternating voltage network through a power station. A converter of a station has two current valves connected in series, each having one turn-on and turn-off type breaker and a diode connected anti-parallel therewith. Circuits are provided to detect the direction and the intensity of the current through the converter, as well as the current valve through which it flows to actuate the control apparatus of the basis of the detected current level and the identity of the valve carrying the current. The control apparatus operates to commutate current through the valve which is not carrying current when a detected current level in the current carrying valve exceeds a first predetermined level.

Installation pour la transmission d'énergie électrique entre un réseau en tension continue et un réseau en tension alternative, dans une centrale d'énergie. Le convertisseur de la centrale comprend deux soupapes de courant raccordées en série chacune ayant un disjoncteur d'ouverture et de fermeture de circuit ainsi qu'une diode en connexion antiparallèle avec la centrale. Des circuits sont prévus pour détecter la direction et l'intensité du courant dans le convertisseur, ainsi que la soupape de courant dans laquelle le courant circule pour actionner le dispositif de régulation en fonction du niveau de courant détecté et de l'identité de la soupape porteuse de courant. L'appareil de régulation commute le courant dans la soupape qui n'est pas porteuse de courant lorsqu'un niveau de courant détecté dans la soupape de courant dépasse un premier niveau prédéterminé.

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