Methods and Systems for Providing Real-Time Comparison with an Alternate Control Strategy for a Turbine

• US 20090173078A1
• Filed: 01/08/2008
• Published: 07/09/2009
• Est. Priority Date: 01/08/2008
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Thatcher, Jonathan Carl, Disch, Mark, Schaberg, Scott
• Granted Patent: US 7,822,512 B2
• Time in Patent Office: Days
• US Class Current: 60/773
• CPC Class Codes: F02C 9/20 by throttling; by adjusting vanes
• CPC Class Codes: F05D 2270/44 active, predictive, or anticipative
• CPC Class Codes: F05D 2270/707 fuzzy logic
• CPC Class Codes: F05D 2270/708 with comparison tables

Abstract

A method for controlling and modeling a turbine is provided. The method may include modeling the turbine by a primary adaptive turbine model that includes at least one primary operating parameter and modeling the turbine by an alternate adaptive turbine model that includes at least one alternate operating parameter. The method may also include determining a first output value from the primary adaptive turbine model that corresponds at least in part to the operation of the turbine based on a primary control strategy and adjusting the alternate operating parameter or parameters based on an alternate control strategy and based at least in part on the first output value. The method may further include determining comparison data based at least in part on a comparison between the primary control strategy and the alternate control strategy.

Claims

1. A method for controlling and modeling a turbine, comprising:

modeling the turbine by a primary adaptive turbine model comprising at least one primary operating parameter;

modeling the turbine by an alternate adaptive turbine model comprising at least one alternate operating parameter;

determining a first output value from the primary adaptive turbine model that is associated at least in part with operation of the turbine based on a primary control strategy;

adjusting the at least one alternate operating parameter based on an alternate control strategy and based at least in part on the first output value; and

determining comparison data based at least in part on a comparison between the primary control strategy and the alternate control strategy.

2. The method of claim 1, further comprising:

tuning the primary adaptive turbine model by adjusting the at least one primary operating parameter based at least in part on a tuning algorithm based at least in part on the operating state of the turbine; and

tuning the alternative adaptive turbine model by adjusting the at least one alternate operating parameter also based at least in part on the tuning algorithm.

3. The method of claim 2, wherein the tuning algorithm comprises a Kalman filter.

4. The method of claim 1, wherein:

the at least one primary operating parameter comprises at least one of fuel flow, inlet guide vane, or inlet bleed heat of the turbine; and

the at least one alternate operating parameter comprises at least one of fuel flow, inlet guide vane, or inlet bleed heat of the alternate adaptive turbine model.

5. The method of claim 1, wherein the first output value comprises power output of the turbine.

6. The method of claim 1, wherein:

the turbine is operating at part load;

adjusting the at least one alternate operating parameter is performed until a second output value of the alternate adaptive turbine model substantially equals the first output value of the primary adaptive turbine model; and

determining comparison data occurs after the second output value substantially equals the first output value.

7. The method of claim 6, wherein determining comparison data comprises:

comparing a first fuel flow of the primary adaptive turbine model to a second fuel flow of the alternate adaptive turbine model; and

determining an output associated with fuel savings.

8. The method of claim 1, wherein:

the turbine is operating at about base load; and

adjusting the at least one alternate operating parameter is performed until the alternate adaptive turbine model models the turbine operating at about base load based on the alternate control strategy; and

the determining comparison data occurs after the alternate adaptive turbine model models the turbine operating at about base load.

9. The method of claim 8, wherein the determining comparison data comprises:

comparing the power output of the turbine to the power output of the alternate adaptive turbine model; and

determining an output associated with power difference.

10. The method of claim 1, further comprising presenting some or all of the comparison data to a user.

11. The method of claim 1, further comprising storing some or all of the comparison data in a memory.

12. A turbine control and modeling system, comprising:

a primary adaptive turbine model operable to model operation of a turbine, wherein the primary adaptive turbine model comprises at least one primary operating parameter; and

an alternate adaptive turbine model operable to model operation of the turbine, wherein the alternate adaptive turbine model comprises at least one alternate operating parameter;

wherein the system is operable to;

determine a first output value from the primary adaptive turbine model that is associated at least in part with operation of the turbine based on a primary control strategy;

adjust the at least one alternate operating parameter based on an alternate control strategy and based at least in part on the first output value;

determine comparison data based at least in part on a comparison between the primary control strategy and the alternate control strategy.

13. The system of claim 12, wherein:

the primary adaptive turbine model can be tuned by adjusting the at least one primary operating parameter based at least in part on a tuning algorithm based at least in part on the operating state of the turbine; and

the alternative adaptive turbine model is tuned by adjusting the at least one alternate operating parameter based at least in part on the tuning algorithm.

14. The system of claim 13, wherein the tuning algorithm comprises a Kalman filter.

15. The system of claim 12, wherein:

the at least one primary operating parameter comprises at least one of fuel flow, inlet guide vane, or inlet bleed heat of the turbine; and

the at least one alternate operating parameter comprises at least one of fuel flow, inlet guide vane, or inlet bleed heat of the alternate adaptive turbine model.

16. The system of claim 12, wherein the first output value comprises power output of the turbine.

17. The system of claim 12, wherein the at least one primary operating parameter comprises fuel flow and the at least one alternate operating parameter comprises fuel flow, and when the turbine is operating at part load:

the system is operable to adjust at least the fuel flow alternate operating parameter based on the alternate control strategy until power output of the alternate adaptive turbine model substantially equals power output of the primary adaptive turbine model;

the system is operable to compare the fuel flow primary operating parameter with the fuel flow alternate operating parameter after determining power output of the alternate adaptive turbine model substantially equals power output of the primary adaptive turbine model; and

the system determines comparison data comprising an output associated with fuel savings.

18. The system of claim 12, wherein the at least one primary operating parameter comprises primary fuel flow and the at least one alternate operating parameter comprises alternate fuel flow, and when the turbine is operating at base load:

the system is operable to adjust at least the alternate fuel flow based on the alternate adaptive turbine model until the alternate adaptive turbine model models the turbine operating at about base load; and

the system is further operable to compare power output of the turbine to power output of the alternate adaptive turbine model, wherein the system determines comparison data comprising an output associated with power difference.

19. A method for controlling and modeling a turbine, comprising:

modeling the turbine using a primary adaptive turbine model comprising at least one primary operating parameter;

modeling the turbine using an alternate adaptive turbine model comprising at least one alternate operating parameter;

tuning the primary adaptive turbine model and the alternate adaptive turbine model;

wherein when the turbine is operating at about part load based on a primary control strategy, the at least one alternate operating parameter can be adjusted to determine an alternate power output based on an alternate control strategy substantially equal to the turbine power output, and the at least one primary operating parameter can be compared to the at least one alternate operating parameter;

wherein when the turbine is operating at about base load based on the primary control strategy, the at least one alternate operating parameter can be adjusted to determine an alternate maximum power output based on the alternate control strategy, and a maximum turbine power output associated with the turbine can be compared to the alternate maximum power output.

20. The method of claim 19, further comprising determining comparison data comprising at least one of an output associated with fuel savings comparing fuel usage by the turbine to fuel usage modeled by the alternate adaptive turbine model, or an output associated with power difference comparing power generated by the turbine to power modeled by the alternate adaptive turbine model.