Patent ID: 7895821

Claim:
A Dry Low NOx (DLN) combustion gas turbine comprising: a primary gas fuel supply system; a secondary gas supply system; a combustor, comprising a single downstream combustion zone supplied by a center fuel nozzle centered on an axis of the combustor and a plurality of primary nozzles concentrically arranged around the center nozzle, wherein the primary nozzles and the center fuel nozzle premix a fuel blend with air for the combustor, and further wherein the fuel blend includes a primary gas fuel from the primary gas fuel supply system and an secondary gas from the secondary gas supply system; a gas turbine control system; an emission control monitoring system; and a blended fuel control function, including a fuel quality monitoring system that monitored a fuel blend composition and a combustion dynamics monitoring system that monitored a combustion dynamic level, wherein the blended fuel control function controlling the fuel blend of the primary gas fuel from the primary gas fuel supply and the secondary gas from the secondary gas supply system according to a predetermined range of the fuel blend composition and the combustion dynamic level.