Method and system for tuning a gas turbine and gas turbine...

F - Mech Eng,Light,Heat,Weapons – 02 – C

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F02C 9/52 (2006.01) F02C 9/54 (2006.01)

Patent

CA 2752528

The invention relates to a system and to a method for tuning a gas turbine having a compressor system (10) with at least one portion (210) having a variable shape, a combustion chamber and a turbine assembly, wherein said method includes: setting a flow setpoint (C*) for the fuel to be fed into the combustion chamber on the basis of a target mode of the gas turbine, calculating threshold values (C/Pmin', C/Pmax') for maintaining the fuel flow setpoint value within a given range, the threshold values depending on a thermodynamic state of the gas turbine, and controlling the position of the variably-shaped portion by controlling an actuator on the basis of the deviation between position information (XGV) representative of the instantaneous position and setpoint position information (XGV*), the threshold values being adjusted automatically by a real-time calculation on the basis of the instantaneous position information of the variably-shaped portion or the deviation (epsilonXGV) between the detected position information and the setpoint position information.

Système et procédé de régulation d'une turbine à gaz ayant (10) un ensemble compresseur avec au moins une partie (210) de géométrie variable, une chambre de combustion et un ensemble turbine, le procédé comprenant : l'élaboration d'une consigne de débit de carburant (C*) à amener à la chambre de combustion en fonction d'un régime souhaité de la turbine à gaz, le calcul de valeurs de seuil (C/Pmin', C/Pmax' ) pour maintenir la valeur de consigne de débit de carburant dans une plage donnée, les valeurs de seuil étant fonction d'un état thermodynamique de la turbine à gaz, et l'asservissement de la position de la partie de géométrie variable par commande d'un actionneur en fonction de l'écart entre une information de position (XGV) représentative de la position instantanée et une information de position de consigne (XGV*), les valeurs de seuil sont ajustées automatiquement par calcul en temps réel en fonction de l'information de position instantanée de la partie de géométrie variable ou de l'écart (epsilonXGV) entre cette information de position détectée et l'information de position de consigne.

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