Systems and methods for calculating and predicting near term production cost, incremental heat rate, capacity and emissions of electric generation power plants based on current operating and, optionally, atmospheric conditions

• US 7,489,990 B2
• Filed: 07/17/2007
• Issued: 02/10/2009
• Est. Priority Date: 07/17/2006
• Status: Active Grant

• Current Assignee: Linda A. Hutchinson, Stephen L. Fehr
• Original Assignee: Linda A. Hutchinson, Stephen L. Fehr
• Inventors: Fehr, Stephen L., Hutchinson, Linda A.
• Primary Examiner(s): DeCady; Albert
• Assistant Examiner(s): Garland; Steven R
• Application Number:
  US11/779,139
• Publication Number:
  US 20080021675A1
• Time in Patent Office: 574 Days
• Field of Search: 700/291, 700/286, 702/60, 702/61, 702/182
• US Class Current: 700/291
• CPC Class Codes: G06Q 10/04 Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" market predictions or forecasting for commercial activities G06Q30/0202

Abstract

Systems and methods for calculating and predicting performance characteristics, incremental heat rate, capacity, incremental costs, production cost and emissions, for electric power generation plants, and in particular, those that use steam and gas-turbine prime movers. The system includes models and modules for calculating current unit performance and predicting unit performance, including the incremental heat rate and maximum capacity, using unit operating parameters, unit configuration data, and fuel constituency data. The system further includes a module for forecasting or predicting unit performance and cost information, by allowing the user to alter unit configuration and fuel constituency data to model planned maintenance and projected fuel changes, and to account for anticipated atmospheric conditions.

Claims

1. A system for calculating an incremental heat rate and a maximum capacity for at least one power generating unit, comprising:

a current performance model, for performing a mass and energy balance for a power generating unit and calculating one or more performance characteristics for a first time period for the power generating unit, including at least a heat input value and an electrical output value, using at least one of data describing the unit'"'"'s physical configuration, data describing the unit'"'"'s operating parameters, and data describing the unit'"'"'s fuel constituency;

a database, for storing at least one of the performance characteristics;

an incremental heat rate model, for calculating an incremental heat rate for the power generating unit for the first time period, using at least one of the performance characteristics, by

determining a first point on an input/output curve by calculating a first heat input value at a first electrical output value, where the first electrical output value is less than the electrical output value for the first time period,

determining a second point on the input/output curve by calculating a second heat input value at a second electrical output value, where the second electrical output value is greater than the electrical output value for the first time period,

calculating a slope of a line connecting the first point and the second point on the input/output curve, where the slope of the line represents the incremental heat rate for the first time period; and

a maximum capacity model, for performing an energy balance for the power generating unit and calculating a maximum capacity for the power generating unit for the first time period, using at least one of the performance characteristics.

2. The system of claim 1, further comprising a forecasting module, for calculating a forecast incremental heat rate and a forecast maximum capacity for a second time period for the power generating unit, using at least one of the performance characteristics and at least one of data describing an anticipated physical configuration of the unit, data describing an anticipated fuel constituency of the unit, and data describing anticipated atmospheric conditions.

3. The system of claim 2, further comprising a user interface, for displaying at least one of the incremental heat rate for the first time period, the maximum capacity for the first time period, the forecast incremental heat rate for the second time period, the forecast maximum capacity for the second time period, and the performance characteristics for the first time period.

4. The system of claim 1, where the energy balance incorporates the First and Second Laws of Thermodynamics.

5. The system of claim 1, where the first electrical output value is approximately 2 percent to 5 percent less than the electrical output value for the first time period, and the second electrical output value is approximately 2 percent to 5 percent greater than the electrical output value for the first time period.

6. The system of claim 1, where the first time period is a most recent time interval.

7. The system of claim 6, where the most recent time interval is between approximately five minutes and approximately fifteen minutes prior to the current time.

8. A method for calculating an incremental heat rate and a maximum capacity for at least one power generating unit, comprising:

performing a mass and energy balance for a power generating unit and calculating one or more performance characteristics for a first time period for the power generating unit, including at least a heat input value and an electrical output value, using at least one of data describing the unit'"'"'s physical configuration, data describing the unit'"'"'s operating parameters, and data describing the unit'"'"'s fuel constituency;

storing at least one of the performance characteristics;

calculating an incremental heat rate for the power generating unit for the first time period, using at least one of the performance characteristics, by

determining a first point on an input/output curve by calculating a first heat input value at a first electrical output value, where the first electrical output value is less than the electrical output value for the first time period,

determining a second point on the input/output curve by calculating a second heat input value at a second electrical output valve, where the second electrical output value is greater than the electrical output value for the first time period, and

calculating a slope of a line connecting the first point and the second point on the input/output curve, where the slope of the line represents the incremental heat rate for the first time period; and

performing an energy balance for the power generating unit and calculating a maximum capacity for the power generating unit for the first time period, using at least one of the performance characteristics.

9. The method of claim 8, further comprising calculating a forecast incremental heat rate and a forecast maximum capacity for a second time period for the power generating unit, using at least one of the performance characteristics and at least one of data describing an anticipated physical configuration of the unit, data describing an anticipated fuel constituency of the unit, and data describing anticipated atmospheric conditions.

10. The method of claim 9, further comprising calculating a forecast incremental cost using the forecast incremental heat rate and at least one of data describing anticipated fuel costs, data describing anticipated consumable costs, data describing anticipated emissions costs, data describing anticipated plant depreciation costs, and data describing anticipated maintenance costs.

11. The method of claim 9, further comprising displaying at least one of the incremental heat rate for the first time period, the maximum capacity for the first time period, the forecast incremental heat rate for the second time period, the forecast maximum capacity for the second time period, and the performance characteristics for the first time period.

12. The method of claim 8, further comprising calculating an incremental cost for the first time period using the incremental heat rate for the first time period and at least one of data describing fuel costs, data describing consumable costs, data describing emissions costs, data describing plant depreciation costs, and data describing maintenance costs.

13. The method of claim 8, where the step of performing an energy balance incorporates the First and Second Law of Thermodynamics.

14. The method of claim 8, where the first electrical output value is approximately 2 percent to 5 percent less than the electrical output value for the first time period, and the second electrical output value is approximately 2 percent to 5 percent greater than the electrical output value for the first time period.

15. A method for calculating an incremental heat rate and a maximum capacity for at least one power generating unit, comprising:

performing a mass and energy balance for a power generating unit and calculating one or more performance characteristics for a first time period for the power generating unit, including at least a heat input value and an electrical output value, using at least one of data describing the unit'"'"'s physical configuration, data describing the unit'"'"'s operating parameters, and data describing the unit'"'"'s fuel constituency;

storing at least one of the performance characteristics;

calculating an incremental heat rate for the power generating unit for the first time period, using at least one of the performance characteristics, by

determining a first point on an input/output curve by calculating a first heat input value at a first electrical output value, where the first electrical output value is approximately 2 percent to 5 percent less than the electrical output value for the first time period,

determining a second point on the input/output curve by calculating a second heat input value at a second electrical output value, where the second electrical output value is approximately 2 percent to 5 percent greater than the electrical output value for the first time period, and

calculating a slope of a line connecting the first point and the second point on the input/output curve, where the slope of the line represents the incremental heat rate for the first time period; and

performing an energy balance for the power generating unit, where the energy balance incorporates the First and Second Laws of Thermodynamics to determine a maximum capacity for the power generating unit for the first time period, using at least one of the performance characteristics.

16. The method of claim 15, further comprising calculating a forecast incremental heat rate and a forecast maximum capacity for a second time period for the power generating unit, using at least one of the performance characteristics for the first time period and at least one of data describing an anticipated physical configuration of the unit, data describing an anticipated fuel constituency of the unit, and data describing anticipated atmospheric conditions.

17. The method of claim 16, further comprising calculating a forecast incremental cost using the forecast incremental heat rate and at least one of data describing anticipated fuel costs, data describing anticipated consumable costs, data describing anticipated emissions costs, data describing anticipated plant depreciation costs, and data describing anticipated maintenance costs.

18. The method of claim 16, further comprising displaying at least one of the incremental heat rate for the first time period, the maximum capacity for the first time period, the forecast incremental heat rate for the second time period, the forecast maximum capacity for the second time period, and the performance characteristics for the first time period.