Control system and method for controlling a gas turbine engine during transients
AssigneeSiemens Aktiengesellschaft
InventorsKrishna C. Miduturi, Danny W. Kozachuk
Life of this patent
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Abstract
A control system and method for a gas turbine engine are provided A controller (40) is responsive to at least one parameter to control an air-to-fuel ratio. The parameter may be a measured engine exhaust temperature from a temperature sensor (42). During a transient, such as a ramping condition of the engine, a measured value of such parameter may have a time lag affecting one or more control settings during the transient condition. The controller is programmed to predictively determine a bias for the measured value of the parameter to correct such control settings and avoid combustion instabilities and high emissions during such transient conditions.
Claims15
A control system for a gas turbine engine comprising:
- a controller responsive to at least one parameter to control an air-to-fuel ratio, wherein during a transient condition of the engine, a measured value of said at least one parameter comprises a time lag affecting at least one control setting during the transient condition of the engine, wherein the controller is programmed to predictively determine a bias to correct said at least one control setting;
- wherein a determination of the bias is based at least in part on a ramp rate of the engine during the transient condition;
- wherein said controller provides control that in part is based on engine exhaust temperature measurements and said at least one parameter comprises a measured engine exhaust temperature;
- wherein a determination of the bias is based on the time lag determined by the difference between the idealized engine exhaust temperature response and the measured engine exhaust temperature;
- and
- further comprising inlet guide vanes to control inlet air flow to a compressor, wherein said at least one control setting comprises a control setting to position said inlet guide vanes during the transient condition of the engine.
A method for controlling a gas turbine engine, the method comprising:
- controlling an air-to-fuel ratio with a controller responsive to at least one parameter;
- measuring a value of said at least one parameter, which during a transient condition of the engine comprises a time lag affecting at least one control setting during the transient condition of the engine;
- and
- predictively determining a bias to correct said at least one control setting;
- wherein the determining of the bias is based at least in part on a ramp rate of the engine during the transient condition;
- wherein said controlling comprises controlling that in part is based on engine exhaust temperature measurements and said at least one parameter comprises a measured engine exhaust temperature;
- wherein the determining of the bias is based on the time lag determined by the difference between the idealized engine exhaust temperature response and the measured engine exhaust temperature;
- and
- further comprising controlling inlet air flow to a compressor with inlet guide vanes, wherein said at least one control setting comprises a control setting to position said inlet guide vanes during the transient condition of the engine.
Dependencies are inferred from the claim text.