Multi-interval dispatch method for enabling dispatchers in power grid control centers to manage changes

• US 20110029147A1
• Filed: 07/02/2010
• Published: 02/03/2011
• Est. Priority Date: 07/02/2010
• Status: Active Grant

• Current Assignee: Alstom Technology Ltd. (Alstom SA)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: Xiao, Ying, Sun, David, Chiu, But-Chung, Cheung, Kwok, Wang, Xing
• Granted Patent: US 9,251,479 B2
• Time in Patent Office: Days
• US Class Current: 700/295
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

A method is provided that enables dispatchers in power grid control centers to manage changes by applying multi-interval dispatch. A multi-stage resource scheduling engine and a comprehensive operating plan are used. Multiple system parameter scenarios are coordinated.

Claims

1. A method for providing dispatchers in power grid control centers with a capability to manage changes, comprising:

applying multi-interval dispatch;

providing a multi-stage resource scheduling engine and a comprehensive operating plan; and

coordinating multiple system parameter scenarios.

2. The method of claim 1, wherein a gap is closed between the day ahead scheduling and commitment and real time economic dispatch.

3. The method of claim 1, wherein the resource scheduling engine coordinates multiple time scenarios.

4. The method of claim 3, wherein the multiple time scenarios include low (L), medium (M) and high (H) scenarios

5. The method of claim 1, wherein an indication of future trajectories is provided.

6. The method of claim 5, wherein the trajectories are dispatch trajectories.

7. The method of claim 1, further comprising:

providing dispatchers in power grid control centers with a capability to manage changes in at least one of, load, generation, interchange and transmission security constraints simultaneously on a intra-day and near real-time operational basis.

8. The method of claim 7, wherein near real time is within 2 hours.

9. The method of claim 7, further comprising:

using least-cost security-constrained economic scheduling and dispatch with resource commitment capability to perform analysis of a desired generation dispatch.

10. The method of claim 9, wherein the resource scheduling engine applies a latest state estimator solution as a starting point and transmission constraint data from an energy management system.

11. The method of claim 10, wherein the resource scheduler engine is an optimization engine that looks ahead at different time frames to forecast system conditions and alter generation patterns within the different time frames.

12. The method of claim 9, further comprising:

using one or more resource scheduling engines with different look-ahead periods to smooth a transition between day ahead and real time schedules.

13. The method of claim 1, further comprising:

using resource profiles that contain parameters selected from at least one of, ramp rate, operating bands, predicted response per megawatt of requested change, and maximum and minimum limits.

14. The method of claim 9, further comprising:

reducing uneconomical dispatch actions that do not look-ahead into future power grid system operational trends.

15. The method of claim 9, further comprising:

committing current unit status in both real-time and in near-real time.

16. The method of claim 9, further comprising:

pre-ramping units to accommodate fast load pickup and improve resource operators'"'"' compliance to dispatch instructions.

17. A method for providing dispatchers in power grid control centers with a capability to manage changes, comprising:

applying multi-interval dispatch;

providing a multi-stage resource scheduling engine and a comprehensive operating plan, the resource scheduling engine including at least resource scheduling 1, resource scheduling 2, and resource scheduling 3; and

coordinating multiple system parameter scenarios.

18. The method of claim 17, wherein resource scheduling 1, 2 and 3 are used to update the comprehensive operating plan.

19. The method of claim 17, wherein resource scheduling 3 provides a multi-interval dispatch solution and provides an indication of dispatch trajectories by foreseeing upcoming events.