| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control method for cooling a turbine stage of a gas turbine, which optimizes the amount of cooling air flow under various operation conditions. <P>SOLUTION: In the control method for cooling the turbine stage 20 of the gas turbine 1, cooling air is extracted from combustion air flowing in a compressor 2 of the gas turbine 1, and supplied to a cooling circuit 55 which starts from a stator 21 of the turbine stage 20. The amount of cooling air flow is adjusted as a function of pressure P<SB POS="POST">Oair</SB>at an entrance of the cooling circuit, and also as a function of combustion air pressure P<SB POS="POST">comp</SB>at an exit of the compressor 2. Especially, feedback control to configure a set point is performed, and the set point is predetermined as a function of power output P of a turbine 4 so as to decrease pollutant emission. <P>COPYRIGHT: (C)2012,JPO&INPIT |
