Wind energy installation with an autonomous energy supply...

F - Mech Eng,Light,Heat,Weapons – 03 – D

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Details

F03D 7/00 (2006.01) F03D 7/02 (2006.01) F03D 9/02 (2006.01) F03D 11/00 (2006.01)

Patent

CA 2656078

Wind energy installation with a generator (13) which is driven by a rotor (2) with adjustable rotor blades (21), for producing electrical energy, wherein a pitch adjustment device (3) is provided for adjusting the blades, which pitch adjustment device comprises an emergency circuit (5) with an energy store (50) for actuating a blade actuating motor (55). The invention provides for a shunt branch (60) with a current-balancing device (6, 6') to be provided in parallel with the energy store (50), wherein the current-balancing device (6, 6') is designed so as to control the current shunt branch (60) depending on a feedback current from the blade actuating motor (55). The invention provides a current balancing circuit (6), with which the feedback current occurring in the overrunning state is dissipated in controlled fashion via a shunt branch and therefore the electrical energy store (50) is protected from a damaging feedback current. The invention therefore achieves a situation in which a damaging rise in the voltage of the electrical energy store (50) and a rise in the motor speed of the blade actuating motor (55) are prevented during overrunning operation. The invention relates to a corresponding method.

L'invention concerne un équipement à énergie éolienne comprenant un générateur (13) entraîné par un rotor (2) muni de pales (21) de rotor positionnables pour produire de l'énergie électrique. Selon l'invention, il est prévu un dispositif (3) de réglage du pas destiné à positionner les pales, lequel comprend un circuit (5) de secours doté d'un accumulateur (50) d'énergie pour actionner un moteur (55) de réglage des pales. Conformément à l'invention, une branche (60) de dérivation comprenant un dispositif (6, 6') miroir de courant est prévue en parallèle avec l'accumulateur (50) d'énergie et le dispositif (6, 6') miroir de courant est configuré de manière à commander la branche (60) de dérivation de courant en fonction d'un courant de retour du moteur (55) de réglage des pales. L'invention concerne un miroir (6) de courant qui permet une évacuation contrôlée par le biais d'une branche de dérivation du courant de retour produit en situation de mouvement et de protéger ainsi l'accumulateur (50) d'énergie électrique d'un courant de retour dommageable. L'invention permet ainsi d'éviter une augmentation dommageable de la tension de l'accumulateur (50) d'énergie électrique ainsi qu'une augmentation de la vitesse de rotation du moteur (55) de réglage des pales lors du déplacement. L'invention concerne un procédé correspondant.

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