CONTROL OF THE GAS COMPOSITION IN A GAS TURBINE POWER PLANT WITH FLUE GAS RECIRCULATION

摘要

The invention relates to a method for operating a gas turbine power plant (38) with exhaust gas recirculation. In the method a setpoint concentration of one component (C ) of the inlet gas (3) and/or of the hot working gas and/or of the exhaust gas of the gas turbine (8 19 20 21 24) is determined in a first step in accordance with the operating conditions of the gas turbine (6) from a combination of a setpoint value of a control loop a feedforward control signal and a correction value. In a second step the position of a control element (11 29) is adjusted in accordance with the setpoint/actual deviation in the concentration of the component. The invention furthermore relates to a gas turbine power plant for carrying out the method.