Method for CO-emission operation of a gas turbine with sequential combustion and gas turbine with improved part-load emission behavior.

摘要

The invention relates to a method for low-CO partial-load operation of a gas turbine with sequential combustion, wherein the air ratio (λ) of the operating burners (9) of the second combustion chamber (15) at part load below a maximum air ratio (λ max) is maintained, and a gas turbine for carrying out the method. In order to reduce the maximum air ratio (λ), a number of modifications in the operating concept of the gas turbine are carried out individually or in combination. One modification is opening the adjustable compressor vane row (14) prior to turning on the second combustion chamber (15). To turn on the second combustion chamber, the variable speed compressor blade row (14) is quickly closed and synchronized fuel is introduced into the burners (9) of the second combustion chamber (15). Another modification is the switching off of individual burners (9) at partial load.