Method for controlling the operation of a gas turbine with sequential combustion

摘要

The invention relates to a method for controlling the operation of a gas turbine (10) with sequential combustion, which gas turbine (10) comprises a compressor (12) with variable inlet guide vanes (VIGV), a first combustor (13), a high-pressure turbine (14) downstream of said first combustor (13), a second combustor (16) downstream of said high-pressure turbine (14), and a low-pressure turbine (17) downstream of said second combustor (16) A prevention of exceeding targeted NOx emission limits as well as a prevention of component stress increase is achieved by adjusting an average TAT1 temperature (TAT1 AVG), if at least one local TAT1 measurement value is increasing above a predetermined threshold value during base load operation.