| 摘要 |
PROBLEM TO BE SOLVED: To provide a performance diagnosis method for a gas turbine capable of accurately grasping the deterioration of performance of the gas turbine from measurement data PWR, CIT, CDP, WGF, TOT,η, NOx obtained from the gas turbine during operation. SOLUTION: (A) At least one of gas turbine outlet temperature TOT, generating end efficiencyηor exhaust gas NOx concentration NOx is selected as performance index I of the gas turbine, (B) the selected performance index is put into a model by linear function including a plurality of unknown parameters by intake air temperature, compressor outlet pressure, a change amount of gas turbine output and noise components, (C) gas turbine output PWR of the gas turbine during operation, intake air temperature CIT, compressor outlet pressure CDP, and the selected performance index I of the gas turbine are continuously obtained at a predetermined time interval, and (D) a plurality of unknown parameters of linear function model are inferred by multiple regression analysis based on the obtained data to obtain performance index excluding external fluctuation components.
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