Method and system for incorporating an emission sensor into a gas turbine controller
AssigneeGeneral Electric Company
InventorTimothy Andrew Healy
Life of this patent
Estimating the term…
Abstract
A method for determining an estimated operating parameter for a gas turbine including the steps of: determining an estimated operating parameter using an algorithm have an input from a sensor, wherein the algorithm includes a trim factor; determining a first trim factor based on a comparison of the first estimated operating parameter and the output of the sensor when a condition of the sensor is in a first mode, and during a subsequent determination of the estimated operating parameter, applying the first trim factor to subsequently determine the estimated operating condition if the condition of second sensor is in a second mode.
Claims20
A system for determining an estimated operating parameter for a gas turbine having an exhaust and a fuel controller comprising:
- a controller including a processor executing a combustion temperature scheduling algorithm and an emissions transfer function stored in electronic memory of the controller, wherein said scheduling algorithm outputs a temperature request signal applied to generate a fuel control command for said fuel controller and said scheduling algorithm receives as an input an emissions trim factor based on an estimated emission level generated by the emissions transfer function;
- an emission sensor measuring an emission level in the exhaust, wherein said sensor has an operating mode and a suspended mode, and
- an emissions trim factor switch selectively applying to the emissions transfer function a current emissions correction factor when said sensor is in the operating mode and a prior emissions correction factor when the sensor is in the suspended mode.
A system for determining an estimated operating parameter for a gas turbine comprising:
- a controller including a processor executing a gas turbine control scheduling algorithm and an emissions transfer function stored in electronic memory of the controller, wherein said scheduling algorithm outputs a turbine condition request signal applied to generate a control command for said gas turbine and said scheduling algorithm receives as an input an emissions trim factor based on an estimated emission level generated by the emissions transfer function;
- an emission sensor measuring an emission level in the exhaust, wherein said sensor has an operating mode and a suspended mode, and
- an emissions trim factor switch selectively applying to the emissions transfer function a current emissions correction factor when said sensor is in the operating mode and a prior emissions correction factor when the sensor is in the suspended mode.
A method for determining an estimated operating parameter for a gas turbine having an exhaust and a fuel controller wherein the controller includes a processor executing a combustion temperature scheduling algorithm and emissions transfer function stored in electronic memory of the controller, said method comprising:
- outputting a temperature request signal by the scheduling algorithm to generate a fuel control command for said fuel controller;
- receiving by the scheduling algorithm an emissions trim factor based on an estimated emission level generated by the emissions transfer function, wherein said emissions transfer function includes a emissions correction factor;
- measuring a emission level by an emission sensor in the exhaust, wherein said sensor has an operating mode and a suspended mode;
- using the emission level measured by the emission sensor to generate a current emissions correction factor;
- selectively switching the sensor between said modes, wherein the current emissions correction factor is selected when said sensor is in the operating mode and a prior emissions correction factor is selected when the sensor is in the suspended mode.
Dependencies are inferred from the claim text.