Patent ID: 7751943

Claim:
A process for protection of a gas turbine from damage caused by pressure pulsations, the process comprising: measuring pressure pulsations occurring during the operation of the gas turbine; generating a pulsation-time signal from the measured pressure pulsations; transforming the pulsation-time signal into a pulsation-frequency signal; determining from the pulsation-frequency signal a pulsation level for at least one specified monitoring frequency band, wherein determining the pulsation level comprises determining from the maximum pulsation value in the monitoring frequency band; monitoring the pulsation level for the occurrence of at least one trigger condition; carrying out, when the at least one trigger condition occurs, a protective action; and shifting the monitoring frequency band upon a frequency shift of the maximum pulsation value, to follow the maximum pulsation value, so that the maximum pulsation value remains within the monitoring frequency band.