Detection and control of gas turbine combustion operation above lean blowout condition

摘要

The method involves detecting a pressure in a combustion chamber with a pulsation sensor (1) and forming a corresponding pressure signal, determining at least one first relative signal component in a first frequency range and a second relative signal component in a second frequency range and producing an output signal (7) representing the proximity to the flame-out limit in accordance with the first and second relative signal components. AN Independent claim is also included for the following: an arrangement for detecting a flame-out limit in a gas turbine.