Electric power system automation using time coordinated instructions

• US 8,275,487 B2
• Filed: 08/10/2010
• Issued: 09/25/2012
• Est. Priority Date: 08/10/2009
• Status: Active Grant

• Current Assignee: Schweitzer Engineering Laboratories, Incorporated
• Original Assignee: Schweitzer Engineering Laboratories, Incorporated
• Inventors: Schweitzer, Edmund O. III, Whitehead, David E., Zweigle, Gregary C., Fischer, Normann, Morris, Robert E.
• Primary Examiner(s): Bahta, Kidest
• Application Number:
  US12/854,088
• Publication Number:
  US 20110035066A1
• Time in Patent Office: 777 Days
• Field of Search: 700/297, 700/286, 700/295, 700/293, 700/294, 702 61- 64, 702182-185, 702/57, 702/60, 342/500, 707/100, 340/870
• US Class Current: 700/286
• CPC Class Codes: H02J 13/00016 using a wired telecommunication network or a data transmission bus
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 3/06 Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
• CPC Class Codes: H02J 3/16 by adjustment of reactive power
• CPC Class Codes: H02J 3/1821 using shunt compensators H02J3/1807, H02J3/1878 take precedence
• CPC Class Codes: Y02E 40/30 Reactive power compensation
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/00 Systems supporting electrical power generation, transmission or distribution
• CPC Class Codes: Y04S 10/18 using switches, relays or circuit breakers, e.g. intelligent electronic devices [IED]
• CPC Class Codes: Y04S 10/22 Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
• CPC Class Codes: Y04S 40/124 using wired telecommunication networks or data transmission busses

Abstract

A system for controlling and automating an electric power delivery system by executing time coordinated instruction sets to achieve a desired result. A communication master may implement the execution of time coordinated instruction sets in a variety of circumstances. The communication may be embodied as an automation controller in communication with intelligent electronic devices (IEDs). The communication master may also be embodied as an IED that is configured to coordinate the actions of other IEDs. The time coordinated instruction sets may include steps for checking status of power system equipment before executing. The time coordinated instruction sets may include reactionary steps to execute if one of the steps fails. The time coordinated instruction sets may also be implemented based on a condition detected in the electric power delivery system, or may be implemented through high level systems, such as a SCADA system or a wide area control and situational awareness system.

Claims

1. A system for controlling an electric power delivery system, comprising:

a communications network;

a monitored equipment;

a plurality of intelligent electronic devices (IEDs), each of the plurality of IEDs comprising;

an IED network communications interface connected to the communications network to communicate with each of the other IEDs connected to the communications network;

a communication master in communication with each of the plurality of IEDs via the communications network, the communication master comprising;

a processor;

a communication master network communications interface to communicate with each of the plurality of IEDs;

a computer-readable storage medium, comprising;

instructions executable on the processor that enable the communication master to;

detect an electrical condition;

establish an execution time for a time coordinated instruction set that includes a coordinated action for the monitored equipment based on the detected electrical condition; and

transmit the execution time to each of the plurality of IEDs via the communication master network communications interface;

and

wherein each of the plurality of IEDs begins to perform the time coordinated instruction set at the execution time for time coordinated execution by the monitored equipment.

2. The system of claim 1, wherein one of the plurality of IEDs comprises a sensor component configured to monitor an electrical characteristic.

3. The system of claim 2, wherein detection of the electrical condition is based on the electrical characteristic monitored by the sensor component.

4. The system of claim 1, wherein at least one of the plurality of IEDs comprises an external time input configured to receive an external time signal from an external time source, and wherein the external time signal is utilized to determine the execution time.

5. The system of claim 1, wherein the at least one characteristic of the monitored equipment comprises one of current, voltage, and volts-amperes reactive.

6. The system of claim 1, wherein the computer-readable storage medium further comprises a plurality of time coordinated instruction sets.

7. The system of claim 6, wherein the computer-readable storage medium further comprises instructions executable on the processor that enable the communication master to transmit a selected time coordinated instruction set via the communication master network communications interface to each of the plurality of IEDs.

8. The system of claim 6, wherein the computer-readable storage medium further comprises instructions executable on the processor that enable the communication master to select one of the plurality of time coordinated instruction sets based on the detected electrical condition.

9. The system of claim 1, wherein the computer-readable storage medium further comprises instructions executable on the processor that enable the communication master to obtain verification from a user prior to establishing the first execution time.

10. The system of claim 1, wherein one of the plurality of IEDs comprises a monitored equipment interface to issue control instructions to the monitored equipment.

11. A method for controlling an electric power delivery system by executing a time coordinated instruction set, comprising:

connecting a plurality of intelligent electronic devices (IEDs) in communication with monitored equipment in an electrical power delivery system via a data network;

monitoring an electrical characteristic in the electric power delivery system;

detecting an electrical condition based on the monitored electrical characteristic;

determining a time coordinated instruction set comprising at least one execution action for execution by the monitored equipment;

establishing an execution time for the time coordinated instruction set based upon the detection of the electrical condition;

transmitting the execution time to each of the plurality of IEDs via the data network; and

executing the time coordinated instruction set beginning at the execution time for time coordinated execution by the monitored equipment.

12. The method of claim 11, further comprising:

synchronizing each of the plurality of IEDs to a common time reference.

13. The method of claim 12, wherein synchronizing the plurality IEDs to a common time reference comprises each of the plurality of IEDs receiving a common time signal via an external time input.

14. The method of claim 11, further comprising:

obtaining verification from a user prior to establishing the first execution time.

15. The method of claim 11, further comprising:

transmitting the time coordinated instruction set to each of the plurality of IEDs.

16. An intelligent electronic device (IED), comprising:

a network communications interface to communicate with a plurality of IEDs via a communications network;

a processor;

a computer-readable storage medium comprising;

a plurality of time coordinated instruction sets of coordinated actions for execution by the monitored equipment;

a condition evaluation module executable on the processor to evaluate a condition based on an electrical characteristic of a monitored equipment in communication with an IED, and to select a time coordinated instruction set of coordinated actions for execution by the monitored equipment based on the electrical condition;

a time coordination module executable on the processor to establish an execution time for the time coordinated instruction set based upon the detection of the electrical condition;

an IED interface module executable on the processor to communicate the time coordinated instruction set to each of the plurality of IEDs via the communications network for time coordinated execution by the monitored equipment.

17. The IED of claim 16, further comprising:

a sensor component to provide data to the condition evaluation module.

18. The IED of claim 16, further comprising:

an external time input configured to receive an external time signal from an external time source, and wherein the external time signal is utilized to establish the execution time.

19. The IED of claim 16, further comprising:

an operator verification module configured to obtain verification from a user prior to establishing the first execution time.

20. The IED of claim 16, further comprising:

a control output configured to implement an execution action associated with the time coordinated instruction set.