Patent ID: 8959925
Filing Date: 2015-02-24
Classification: F02C,F23R,Y02E

Abstract:
1. A method of controlling gas turbine operation in response to lean blowout of a combustion can, wherein a gas turbine comprises at least two combustion cans, a first combustion can comprising a first plurality of fuel nozzles; a second combustion can comprising a second plurality of fuel nozzles; the method comprising: sensing that the first combustion can is extinguished during a full load operation of the gas turbine; adjusting a fuel ratio between at least one of the first plurality of fuel nozzles in the first combustion can and at least one of the second plurality of fuel nozzles in the second combustion can; delivering a richer fuel mixture to the at least one of the second plurality of fuel nozzles wherein the at least one of the second plurality of fuel nozzles is a fuel nozzle nearest to a cross-fire tube; generating a cross-fire from the second combustion can to the first combustion can via the cross-fire tube; detecting a recovery of the full load operation of the gas turbine; and adjusting the fuel ratio to a balanced fuel distribution between the first and second plurality of fuel nozzles.