Method for controlling the operation of a gas turbine with sequential combustion
OwnerAndreas Jan Schesny, Pimin Schiessel +3inventors
InventorsAndreas Jan Schesny, Pimin Schiessel, Piotr Siewert, Torsten Lüddecke, Rajeshwor Dhital
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Abstract
A method for controlling the operation of a gas turbine with sequential combustion, which gas turbine comprises a compressor with variable inlet guide vanes (VIGV), a first combustor, a high-pressure turbine downstream of the first combustor, a second combustor downstream of the high-pressure turbine, and a low-pressure turbine downstream of the second combustor.
Claims14
A method for controlling the operation of a gas turbine with sequential combustion, which gas turbine comprises a compressor with variable inlet guide vanes (VIGV), a first combustor, a high-pressure turbine Downstream of said first combustor, a second combustor downstream of said high-pressure turbine, and a low-pressure turbine downstream of said second combustor, said method comprising the steps of:
- verifying that the gas turbine operates under base load conditions;
- continuously measuring locally at various points the turbine outlet temperature TAT1 of the high-pressure turbine;
- averaging over the various local TAT1 measurement values to get an average TAT1 temperature (TAT1 AVG);
- controlling the operation of the first combustor in dependence of said average TAT1 temperature (TAT1 AVG);
- checking if at least one local TAT1 measurement value, which is higher than said average TAT1 temperature (TAT1 AVG), is increasing;
- adjusting said average TAT1 temperature (TAT1 AVG), if said at least one local TAT1 measurement value is increasing above a predetermined threshold value.
Dependencies are inferred from the claim text.