Transient turbine exhaust temperature control for a turbogenerator
AssigneeCapstone Turbine Corporation
InventorsMark Gilbreth, Joel Wacknov, Simon Wall, Ed Edelman
Life of this patent
Estimating the term…
Abstract
A turbogenerator is controlled by a temperature loop that provides fuel to the combustor to maintain a desired turbine exhaust temperature, and by a speed control loop that controls the speed of the turbogenerator to provide a desired power output. When the desired power output is reduced, the turbogenerator speed is reduced accordingly, and the desired turbine exhaust temperature is increased temporarily to maintain sufficient fuel flow to the combustor to prevent combustor flame-out.
Claims6
A method for controlling a turbogenerator, comprising:
- operating the turbogenerator at a selected speed to provide a selected amount of power;
- providing fuel to the turbogenerator to maintain a turbine exhaust temperature at a first selected value;
- reducing the turbogenerator speed to provide a reduced amount of power;
- providing fuel to the turbogenerator to maintain the turbine exhaust temperature at a second selected value higher than the first selected value for a selected period of time;
- and
- gradually increasing the amount of fuel provided to the turbogenerator over the selected period of time to maintain the turbine exhaust temperature at the second selected value.
A method for controlling a turbogenerator, comprising:
- operating the turbogenerator at a selected speed to provide a selected amount of power;
- providing fuel to the turbogenerator to maintain a turbine exhaust temperature at a first selected value;
- reducing the turbogenerator speed to provide a reduced amount of power, wherein reducing the turbogenerator speed comprises reducing the turbogenerator speed to provide a reduced amount of power in response to a reduction in power demand;
- providing fuel to the turbogenerator to maintain the turbine exhaust temperature at a second selected value higher than the first selected value for a selected period of time;
- and
- prior to reducing the turbogenerator speed, allowing a specified period of time to lapse after the reduction in the power demand.
A method for controlling a turbogenerator, comprising:
- operating the turbogenerator at a selected speed to provide a selected amount of power;
- providing fuel to the turbogenerator to maintain a turbine exhaust temperature at a first selected value;
- reducing the turbo generator speed to provide a reduced amount of power;
- and
- providing fuel to the turbogenerator to maintain the turbine exhaust temperature at a second selected value higher than the first selected value for a selected period of time,
- wherein the period of time is selected in accordance with characteristics of a heat recuperator associated with the turbogenerator.
Dependencies are inferred from the claim text.