Method for Controlling a Burner and Burner Arrangement having a Burner

A method of regulating a burner, the method comprising:

• supplying the burner with an air-fuel mixture;
• measuring an ionization signal;
• determining a regulating variable based on the ionization signal;
• setting the air-fuel mixture depending on the regulating variable and at least one setpoint value;
• obtaining, by a Fourier transformation, a spectrum from the ionization signal;
• determining a value of an area under the spectrum or under at least one frequency range of the spectrum;
• and
• adjusting the at least one setpoint value depending on the value of the area.

A burner arrangement, comprising:

• a burner;
• a heat exchanger;
• an ionization electrode configured to measure an ionization signal;
• an air-fuel-mixture supply configured to supply an air-fuel mixture to the burner;
• and
• a control device configured to:
• determine a regulating variable based on the ionization signal;
• act on the air-fuel-mixture supply to set the air-fuel mixture for the burner depending on the regulating variable and at least one setpoint value;
• obtain, by a Fourier transformation, a spectrum from the ionization signal;
• determine a value of an area under the spectrum or under at least one frequency range of the spectrum;
• and
• adjust the at least one setpoint value depending on the value of the area.