| 摘要 |
A control method for cooling a turbine stage (20) of a gas turbine (1), whereby cooling air is bled from combustion air flowing in a compressor (2) of the gas turbine (1), and is fed to a cooling circuit (55) staring from a stator (22) of the turbine stage (20); and cooling airflow is adjusted as a function of the pressure (P Oair ) at the inlet of the cooling circuit, and as a function of the combustion air pressure (P comp ) at the exhaust of the compressor (2); more specifically, there is a feedback control setting a setpoint, which is predetermined as a function of the power output (P) of the turbine (4) to reduce contaminating emissions. |
