Patent ID: 7100357

Claim:
A controller in a gas turbine having a compressor, combustor and turbine, said controller comprising: a sensor input receiving data regarding an actual turbine exhaust temperature, a compressor pressure ratio level, a compressor pressure inlet loss, a turbine back pressure level and ambient humidity; a processor executing a program, wherein said program further comprises: a compressor schedule for generating a first target exhaust temperature based on the compressor pressure ratio level, and at least one additional schedule for generating a temperature change to be applied to the first target turbine exhaust temperature wherein the temperature change is derived from at least one parameter of a group of parameters consisting of specific humidity, compressor inlet pressure loss and the turbine back pressure level, and wherein said processor outputs a modified target exhaust temperature based on the first target exhaust temperature and the temperature change, and said controller outputs a combustor control signal based on the modified target exhaust temperature.