Current limitation for a double-fed asynchronous machine

H - Electricity – 02 – P

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H02P 21/00 (2006.01) H02P 6/00 (2006.01) H02P 9/00 (2006.01)

Patent

CA 2644984

In a method and an apparatus for controlling the output or drawn active and reactive power of a double-fed asynchronous machine (5), the maintenance of a maximum permissible current (16) of the machine - without the use of a subordinate current controller - is ensured by virtue of the fact that, during the operation of the double-fed asynchronous machine, a maximum permissible desired value for the active power (10a) to be output or to be drawn and a maximum permissible desired value for the reactive power (10b) to be output or to be drawn are calculated with the aid of a model of the asynchronous machine from the maximum permissible current (16), preferably corrected at least using the actual value of the current to be limited of the machine, in such a way that the maximum permissible current (16) is not exceeded. The predetermined active and reactive power desired values are then limited to the calculated maximum permissible values.

L'invention concerne un procédé et un dispositif de régulation de la puissance active ou réactive délivrée ou absorbée d'une machine (5) asynchrone à double alimentation avec lesquels le maintien d'un courant (16) maximum admissible de la machine, en renonçant à un régulateur de courant sous-jacent, est garanti en ce que, pendant le fonctionnement de la machine asynchrone à double alimentation, une valeur de consigne maximale admissible de la puissance (10a) active à délivrer ou à absorber ainsi qu'une valeur de consigne maximale admissible de la puissance (10b) réactive à délivrer ou à absorber sont calculées à l'aide d'un modèle de machine asynchrone à partir du courant (16) maximum admissible ~ de préférence corrigé au moins au moyen de la valeur réelle du courant à limiter de la machine ~ de telle sorte que le courant (16) maximum admissible ne soit pas dépassé. Les valeurs de consigne prédéfinies de la puissance active et réactive sont ensuite limitées aux valeurs maximales admissibles calculées.

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