ELECTRIC POWER SYSTEM AUTOMATION USING TIME COORDINATED INSTRUCTIONS

• US 20110035065A1
• Filed: 08/10/2010
• Published: 02/10/2011
• Est. Priority Date: 08/10/2009
• Status: Active Grant

• Current Assignee: Schweitzer Engineering Laboratories, Incorporated
• Original Assignee: Schweitzer Engineering Laboratories, Incorporated
• Inventors: Fischer, Normann, Morris, Robert E., Zweigle, Gregary C., Schweitzer, Edmund O. III, Whitehead, David E.
• Granted Patent: US 8,275,486 B2
• Time in Patent Office: Days
• 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 sensor component to monitor an electrical characteristic of a monitored equipment;

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

an IED network communications interface connected to the communications network, the IED network communications interface configured to communicate with other IEDs connected to the communications network; and

a control output to issue control instructions to the monitored equipment; and

a communication master in communication with the plurality of IEDs and the sensor component via the communications network, the communication master comprising;

a processor;

a communication master network communications interface configured to communicate with the plurality of IEDs and the sensor component via the communications network;

a computer-readable storage medium comprising;

a plurality of time coordinated instruction sets; and

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

establish a first execution time of a first time coordinated instruction set selected from the plurality of time coordinated instruction sets;

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

evaluate a condition following the first execution time based on the electrical characteristic of the monitored equipment;

select a second time coordinated instruction from the plurality of time coordinated instruction sets based on the electrical characteristic of the monitored equipment following the first execution time and the condition; and

establish a second execution time of the second time coordinated instruction set;

wherein, the plurality of IEDs begin to execute the first time coordinated instruction set at the first execution time and begin to execute the second time coordinated instruction set at the second execution time.

2. The system of claim 1, wherein one of the plurality of IEDs comprises the sensor component.

3. 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.

4. The system of claim 1, wherein the second time coordinated instruction set comprises a remedial action scheme.

5. The system of claim 4, wherein the first time coordinated instruction set comprises a plurality of execution actions having an order of execution, and the remedial action scheme comprises the plurality of execution actions of the first time coordinated instruction set in reverse of the order of execution of the first time coordinated instruction set.

6. The system of claim 4, wherein the first time coordinated instruction set comprises a plurality of execution actions having an order of execution, and the evaluation of the condition following the first execution time comprises a determination that the at least one execution action of the first time coordinated instruction set failed to execute.

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

8. The system of claim 1, wherein the computer-readable storage medium further comprises instructions executable on the processor to enable the communication master to modify the first time coordinated instruction set based on the electrical characteristic of monitored equipment monitored by the sensor component following the first execution time and the condition.

9. The system of claim 1, wherein the computer-readable storage medium further comprises software instructions to:

query each of the plurality of IEDs prior to the first execution time and the second execution time to determine readiness of each IED to perform the execution actions of each of the first time coordinated instruction set and the second time coordinated instruction set.

10. The system of claim 1, wherein the communication master comprises an automation controller.

11. The system of claim 1, wherein the communication master comprises an IED.

12. The system of claim 1, wherein the communication master comprises a supervisory control and data acquisition system.

13. The system of claim 1, wherein the communication master comprises a wide area control and situational awareness system.

14. 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 an electrical power delivery system via a data network;

selecting a first time coordinated instruction set comprising at least one execution action;

establishing a first execution time for the execution of the first time coordinated instruction set;

executing the first time coordinated instruction set beginning at the first execution time;

evaluating a condition following the execution of the first time coordinated instruction set;

selecting a second time coordinated instruction set based on the condition;

establishing a second execution time for the execution of a second time coordinated instruction set; and

executing the second time coordinated instruction set beginning at the second execution time.

15. The method of claim 14, further comprising:

synchronizing the plurality of IEDs to a common time reference.

16. The method of claim 15, wherein synchronizing the plurality of intelligent electronic devices (IED) to a common time reference comprises each IED receiving a common time signal via an external time input.

17. The method of claim 14, wherein the second time coordinated instruction set comprises a remedial action scheme.

18. The method of claim 14, further comprising:

determining that the at least one execution action failed to execute prior to executing the remedial action scheme.

19. The method of claim 14, further comprising:

transmitting the time coordinated instruction set to at least one of the plurality of IEDs via the data network;

20. 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;

a time coordination module executable on the processor to establish a first execution time of a first time coordinated instruction set and a second execution time of a second time coordinated instruction set;

an IED interface module executable on the processor to communicate the first time coordinated instruction set and the second time coordinated instruction set to each of the plurality of IEDs via the communications network; and

a condition evaluation module executable on the processor to evaluate a condition following the first execution time based on at least one electrical characteristic of a monitored equipment and to select a second time coordinated instruction set based on the condition.