Contingency-based load shedding

• US 9,519,301 B2
• Filed: 02/26/2014
• Issued: 12/13/2016
• Est. Priority Date: 02/26/2014
• Status: Active Grant

• Current Assignee: Schweitzer Engineering Laboratories, Incorporated
• Original Assignee: Schweitzer Engineering Laboratories, Incorporated
• Inventors: Bartlett, Jedidiah W., Allen, William F.
• Primary Examiner(s): Wang, Philip
• Application Number:
  US14/190,858
• Publication Number:
  US 20150241894A1
• Time in Patent Office: 1,021 Days
• US Class Current: 1/1
• CPC Class Codes: G05F 1/66 Regulating electric power

Abstract

Disclosed herein are a variety of systems and methods for management of an electric power generation and distribution system. According to various embodiments, a system consistent with the present disclosure may be configured to analyze a data set comprising a plurality of generator performance characteristics of a generator at a plurality of operating conditions. The performance characteristics may be used to produce a generator capability model. The generator capability model may comprise a mathematical representation approximating the generator performance characteristics at the plurality of operating conditions. The system may further produce an estimated generator capacity at a modeled condition that is distinct from the generator performance characteristics of the data set and is based upon the generator capability model and may implement a control action based on the estimated generator capacity at the modeled condition.

Claims

1. A system for contingency-based load shedding in an electrical power distribution system, comprising:

a data bus;

a processor in communication with the data bus; and

a non-transitory computer readable storage medium in communication with the data bus, the non-transitory computer readable storage medium storing information comprising;

a data set comprising a priority list associating at least one priority with a plurality of loads connected to an electrical power distribution system;

a power system monitoring module executable on the processor and configured to monitor the electrical power distribution system and detect a first contingency trigger associated with a first contingency;

an event window module executable on the processor and configured to identify, within a contingency window following the first contingency;

a first change in topology of the electric power distribution system specified by the first contingency,

a second change in topology affecting at least one of a plurality of sources in electrical communication with the plurality of loads, and

a contingency event associated with the first contingency; and

a load shedding module executable on the processor and configured to selectively shed at least one of the plurality of loads based on the priority list based upon the identification of the first change in topology, the second change in topology, and the contingency event each occurring within the contingency window.

2. The system of claim 1, wherein the event window module is configured to monitor a plurality of status indicators associated with a plurality of electrical couplers in the electric power distribution system, and one of the first change in topology and the second change in topology corresponds to a change associated with at least one of the plurality of electrical couplers.

3. The system of claim 1, wherein the load shedding module is further configured to selectively shed loads based on the priority list until a stabilizing condition is satisfied.

4. The system of claim 3, wherein the load shedding module is further configured to implement a delay period following the shedding of each load prior to evaluation of the stabilizing condition.

5. The system of claim 1, wherein the first contingency trigger comprises a reserve margin falling below a specified threshold.

6. The system of claim 5, wherein the power system monitoring module is further configured to selectively evaluate an incremental reserve margin at a plurality of points throughout the electric power distribution system and to establish the first contingency trigger based on one of the incremental reserve margin at any of the plurality of points.

7. The system of claim 1, wherein the first change in topology, the second change in topology, and the contingency event rely on independently derived information relating to the electric power distribution system.

8. The system of claim 1, wherein the second change in topology results in at least one source of the plurality of sources being associated with a different electrical island following the second change in topology.

9. The system of claim 1, wherein the priority list comprises a priority for each of a plurality of sheddable loads.

10. The system of claim 1, wherein the power system monitoring module is further configured to identify a second contingency trigger associated with a multiple contingency event, and the event window module is configured to identify any of a plurality of contingency events associated with the multiple contingency event.

11. A method for contingency-based load shedding in an electrical power distribution system, comprising:

providing a data set comprising a priority list associating a priority with a plurality of loads connected to the electrical power distribution system;

monitoring the electrical power distribution system and detecting a first contingency trigger associated with a first contingency;

identifying, within a contingency window following the first contingency;

a first change in topology of the electric power distribution system specified by the first contingency

a second change in topology affecting at least one of a plurality of sources in electrical communication with the plurality of loads; and

a contingency event associated with the first contingency; and

shedding at least one of the plurality of loads based on a priority list based upon the identification of the first change in topology, the second change in topology, and the contingency event each occurring within the contingency window.

12. The method of claim 11, further comprising:

identifying one of the first change in topology and the second change in topology by monitoring a plurality of status indicators associated with a plurality of electrical couplers in the electric power distribution system, and the first change in topology corresponds to a change associated with at least one of the plurality of electrical couplers.

13. The method of claim 11, further comprising:

shedding loads based on the priority list until a stabilizing condition is satisfied.

14. The method of claim 13, further comprising:

implementing a delay period following the shedding of each load prior to evaluating the stabilizing condition.

15. The method of claim 11, wherein the first contingency trigger comprises one of a reserve margin falling below a specified threshold.

16. The method of claim 15, further comprising:

evaluating a reserve margin at a plurality of points throughout the electric power distribution system; and

establishing the first contingency trigger based on one of the reserve margin at any of the plurality of points.

17. The method of claim 11, wherein the first change in topology, the second change in topology, and the contingency event rely on independently derived information relating to the electric power distribution system.

18. The method of claim 11, wherein the second change in topology results in at least one source of the plurality of sources being associated with a different electrical island following the second change in topology.

19. The method of claim 11, wherein the priority list comprises a priority for each of a plurality of sheddable loads.

20. The method of claim 11, further comprising:

identifying a second contingency trigger associated with a multiple contingency event; and

identifying any of a plurality of contingency events associated with the multiple contingency event.