Patent ID: 8783042

Claim:
A method for operating a firing plant having at least one combustion chamber and at least one burner, the firing plant for producing hot gas, the method comprising: defining an operating characteristic for operating the combustion chamber close to a lean extinction limit, in the form of a burner group staging ratio (BGV Rich ); measuring, in the combustion chamber, pressure pulsations (Puls Actual (t)); converting said measured pressure pulsations (Puls Actual (t)) into corresponding signals; monitoring exceeding or falling short of at least one pulsation limiting value (Puls umit ); adapting a pulsation reference value (Puls Ref ) in dependence upon said monitoring to form an adapted pulsation reference value (Puls Ref,adapt ); processing said corresponding signals by a filter device to produce processed pressure pulsations (Puls Actual,Filter (t)); comparing the processed pressure pulsations (Puls Actual,Filter (t)) to the adapted pulsation reference value (Puls Ref,adapt ); determining a correction value (ΔBGV) from said comparing, wherein said determining the correction value (ΔBGV) comprises determining the dependence of the correction value (ΔBGV) on at least one amplification factor (K PI ); and correcting the burner group staging ratio (BGV Rich ) based on said correction value (ΔBGV).