Method for operating a gas turbo group

A method for operating a gas turbo group, which gas turbo group includes at least one combustion chamber, wherein the combustion chamber includes at least one catalytic, first burner stage and a second, non-catalytic burner stage following the at least one catalytic burner stage in the flow direction, the method comprising:

• supplying the gas turbo group with a total fuel mass stream ({dot over (m)}FUEL) of the gas turbo group;
• distributing the total fuel mass stream to at least the catalytic burner stage and the non-catalytic burner stage;
• determining the temperature (T2) at the outlet from the catalytic burner stage;
• regulating, limiting to a set value, limiting to a maximum value, or combinations thereof, the temperature at the outlet from the catalytic burner stage by changing the combustion air mass stream and blocking the fuel supply to the non-catalytic burner stage when the combustion air mass stream is below an achievable maximum;
• determining a net power output (PACT) of the gas turbo group;
• and
• regulating the fuel mass flow (mSEV) to the non-catalytic burner stage depending on a control deviation (PSET-PACT) of the net power output.