Patent ID: 9464957
Filing Date: 2016-10-11
CPC Classification: F01D,F01K,F02C,F05D,G01L,Y02E

Claim Text:
1. A method comprising: receiving operating parameters associated with a combined cycle power plant, wherein the combined cycle power plant comprises a gas turbine and a steam turbine, the gas turbine being permanently coupled to a generator while the steam turbine is selectively coupled to the generator via a clutch; receiving an engagement status of the clutch; receiving first data indicative of a simple cycle power plant base load at the operating parameters; receiving second data indicative of a combined cycle power plant base load at the operating parameters; based at least in part on the engagement status, selecting the first data or the second data; estimating a base load based at least in part on the selected data to obtain a base load value, wherein the estimating includes computing a calibration offset, the calibration offset being a difference between the base load value and an actual output of the combined cycle power plant; detecting a base load condition of the combined cycle power plant; and upon or after the detecting, calibrating the base load value based at least in part on the operating parameters and the calibration offset, wherein the calibration offset is valid for the base load condition and a part load condition of the combined cycle power plant as long as the engagement status of the clutch is unchanged.