Patent ID: 6877307

Claim:
A gas turbine power generation apparatus comprising: a compressor for providing a flow of compressed air; a fuel supply for providing a flow of combustible fuel; a combustor for burning the fuel in the compressed air to form a flow of combustion gas; a turbine for expanding the combustion gas and for generating mechanical power; a sensor for generating a signal responsive to pressure transients in the combustion gas; a signal processor for determining the spectral components of the signal; a controller for executing logic for comparing the spectral components of a first frequency range to a first allowable value and the spectral components of a second frequency range extending higher than the first frequency range to a second allowable value to identify unacceptable pressure transients; and logic executable by the controller for implementing a first corrective action in response to an unacceptable pressure transient in the first frequency range and for implementing a second corrective action different than the first corrective action in response to an unacceptable pressure transient in the second frequency range.