Generator control having power grid communications

• US 9,388,753 B2
• Filed: 09/17/2009
• Issued: 07/12/2016
• Est. Priority Date: 09/17/2009
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Prochaska, James K., Kleen, Randall J., Stowell, Thomas E., Ferguson, Garland W., Hannett, Louis N., Adams, William S.
• Primary Examiner(s): GONZALEZ, JULIO CESAR
• Application Number:
  US12/562,064
• Publication Number:
  US 20110062708A1
• Time in Patent Office: 2,490 Days
• Field of Search: 290/7, 290/40.R, 290/40.C, 290/41, 290/51, 290/40.B, 700/287, 700/286
• US Class Current: 1/1
• CPC Class Codes: F02D 29/06 peculiar to engines driving electric generators

Abstract

A system is provided for controlling power generation. For example, the system may include a drive, an electrical generator coupled to the drive, and a controller coupled to the drive. The controller may include a stabilizing mode responsive to a utility signal representative of a grid destabilizing event.

Claims

1. A system, comprising:

a drive;

an electrical generator coupled to the drive;

a controller coupled to the drive, wherein the controller comprises a stabilizing mode responsive to a utility signal representative of a grid destabilizing event; and

a second controller coupled to the drive and configured to control the operation of the drive, wherein the controller is configured to override control of the drive from the second controller and control the drive in response to the utility signal representative of a grid destabilizing event.

2. The system of claim 1, wherein the stabilizing mode is configured to counteract a frequency excursion away from a grid frequency of a power grid, wherein the stabilizing mode comprises an override ramp profile to change a power output of the electrical generator to maintain a frequency of the electrical generator within upper and lower limits of the grid frequency.

3. The system of claim 1, wherein the stabilizing mode comprises a drive boost mode responsive to the utility signal representative of the grid destabilizing event, the grid destabilizing event comprises a sudden load increase in a power grid, and the drive boost mode controls the drive to ramp up to an elevated speed to counteract the sudden load increase.

4. The system of claim 3, wherein the drive boost mode comprises an over-control-limit boost mode that controls the drive to ramp up to the elevated speed above a drive control limit for a limited duration of at least up to approximately 60 seconds.

5. The system of claim 1, wherein the stabilizing mode comprises a drive tract mode responsive to the utility signal representative of the grid destabilizing event, the grid destabilizing event comprises a sudden load decrease in a power grid, and the drive tract mode controls the drive to ramp down to a decreased speed to counteract the sudden load decrease.

6. The system of claim 1, wherein the controller initiates the stabilizing mode within at least less than approximately 10 seconds of the grid destabilizing event, and the stabilizing mode comprises a power generation rate change up to at least approximately 1 MW per second.

7. The system of claim 6, wherein the controller initiates the stabilizing mode within at least less than approximately 5 seconds of the grid destabilizing event, and the stabilizing mode has a duration up to at least approximately 60 seconds.

8. The system of claim 1, wherein the drive comprises a turbine engine.

9. The system of claim 1, wherein the drive comprises a reciprocating combustion engine.

10. The system of claim 1, wherein the controller overrides a governor of the drive in response to the utility signal representative of the grid destabilizing event.

11. A system, comprising:

an electrical generator controller comprising a stabilizing mode responsive to a utility signal representative of a grid destabilizing event, wherein the stabilizing mode comprises an override ramp profile to change a power output of an electrical generator to maintain a frequency of the electrical generator within upper and lower limits of a grid frequency, wherein the electrical generator controller is configured to override control of the electrical generator from a second controller in response to the utility signal representative of a grid destabilizing event.

12. The system of claim 11, wherein the upper and lower limits are at least less than approximately 2 Hz above and below the grid frequency of a power grid.

13. The system of claim 11, wherein the stabilizing mode comprises a boost mode responsive to the utility signal representative of the grid destabilizing event, the grid destabilizing event comprises a sudden load increase in a power grid, and the boost mode has the override ramp profile to ramp up the power output to an elevated power output to counteract the sudden load increase.

14. The system of claim 13, wherein the boost mode comprises an over-control-limit boost mode that controls the system to ramp up to the elevated power output above a system limit for a limited duration of at least up to approximately 60 seconds.

15. The system of claim 11, wherein the stabilizing mode comprises a tract mode responsive to the utility signal representative of the grid destabilizing event, the grid destabilizing event comprises a sudden load decrease in a power grid, and the tract mode has the override ramp profile to ramp down the power output to a decreased power output to counteract the sudden load decrease.

16. The system of claim 11, wherein the electrical generator controller initiates the stabilizing mode within at least less than approximately 5 seconds of the grid destabilizing event, the stabilizing mode comprises a power generation rate change up to at least approximately 1 MW per second, and the stabilizing mode has a duration up to at least approximately 60 seconds.

17. The system of claim 11, wherein the electrical generator controller comprises a turbine generator controller, and the stabilizing mode overrides a governor of a turbine coupled to the electrical generator in response to the utility signal representative of the grid destabilizing event.

18. A system, comprising:

a power grid generator configured to supply a power output to a power grid in response to a control signal from a controller, wherein the power grid generator comprises a stabilizing mode triggered by receipt of an override control signal generated by a second controller in response to a utility signal representative of a grid destabilizing event, the override control signal triggering the stabilizing mode within at least less than approximately 5 seconds of the grid destabilizing event, wherein the stabilizing mode comprises a power generation rate change of the power output.

19. The system of claim 18, wherein the power generation rate change is up to at least approximately 1 MW per second, and the stabilizing mode has a duration up to at least approximately 60 seconds.

20. The system of claim 18, wherein the stabilizing mode counteracts the grid destabilizing event to maintain a frequency of the power grid generator within upper and lower limits of a grid frequency, and the upper and lower limits are at least less than approximately 2 Hz above and below the grid frequency of a power grid.