Exchange of Messages Between Devices in an Electrical Power System

• US 20140280712A1
• Filed: 03/15/2013
• Published: 09/18/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Schweitzer Engineering Laboratories, Incorporated
• Original Assignee: Schweitzer Engineering Laboratories, Incorporated
• Inventors: Dolezilek, David J., Day, Benjamin S., Gammel, Dennis, Bradetich, Ryan, Bennett, Jerry J., Ewing, Christopher
• Granted Patent: US 9,270,109 B2
• Time in Patent Office: Days
• US Class Current: 709/217
• CPC Class Codes: H02H 7/261 involving signal transmission between at least two stations transmission of signals in general H02H1/0061
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message

Abstract

Systems and methods are presented for exchanging messages between devices in an electrical power generation and delivery system. In certain embodiments, a method for exchanging messages between devices may include transmitting messages included in a message stream that includes multiple redundant copies of the messages. An indication may be received that at least one message of the message stream was received by an intended receiving device. Transmission of further redundant copies of the message included in the message stream may be determined based on receipt of the indication.

Claims

1. A method for managing the exchange of messages between a first device and a second device, the method comprising:

transmitting, from a first communications interface of the first device to a second communications interface of the second device, messages included in a message stream, the message stream comprising a plurality of redundant messages;

receiving, at the first communications interface from the second communications interface, an indication that at least one message of the message stream was received by the second device; and

terminating transmission of further redundant copies of the message included in the message stream to the second device.

2. The method of claim 1, wherein the messages comprise IEC 61850 Generic Object Oriented Substation Events (GOOSE) messages.

3. The method of claim 1, wherein the messages each comprise a subscription identifier.

4. The method of claim 1, wherein the messages each comprise data state information.

5. The method of claim 1, wherein the redundant messages comprise identical redundant copies.

6. The method of claim 1, wherein the redundant messages each comprise at least one identical portion.

7. The method of claim 1 further comprising:

generating network information based in part on a time between transmitting the messages and receiving the indication.

8. The method of claim 4, wherein the transmitting comprises:

transmitting at a first rate following a change in the data state information; and

transmitting at a second rate after a period of time following the change in the data state information.

9. A method for exchanging messages between a first device and a second device, the method comprising:

receiving, at a first communications interface of the first device from a second communications interface of the second device, messages included in a message stream, the message stream comprising a plurality of redundant messages; and

transmitting, by the first communications interface to the second communications interface, an indication that at least one message of the message stream was received by the first device configured to cause the second device to terminate transmission of further messages included in the message stream to the first device.

10. The method of claim 9, wherein the messages comprise GOOSE messages.

11. The method of claim 9, wherein the messages each comprise a subscription identifier.

12. The method of claim 9, wherein the redundant messages comprise identical redundant copies.

13. The method of claim 9, wherein the redundant messages each comprise at least one identical portion.

14. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor of a first device, cause the processor to:

transmit, from a first communications interface of the first device to a second communications interface of the second device, messages included in a message stream, the message stream comprising a plurality of redundant messages;

receive, at the first communications interface from the second communications interface, an indication that at least one message of the message stream was received by the second device; and

terminate transmission of further redundant copies of the message included in the message stream to the second device.

15. The non-transitory computer-readable storage medium of claim 14, wherein the messages comprise GOOSE messages.

16. The non-transitory computer-readable storage medium of claim 14, wherein the messages each comprise a subscription identifier.

17. The non-transitory computer-readable storage medium of claim 14, wherein the message comprises data state information.

18. The non-transitory computer-readable storage medium of claim 14, wherein the redundant messages comprise identical redundant copies.

19. The non-transitory computer-readable storage medium of claim 14, wherein the redundant messages each comprise at least one identical portion.

20. The non-transitory computer-readable storage medium of claim 14, wherein the instructions further cause the processor to:

generate network information based in part on a time between transmitting the messages and receiving the indication.

21. The non-transitory computer-readable storage medium of claim 17, wherein the instructions further cause the processor to:

transmit at a first rate following a change in the data state information; and

transmit at a second rate after a period of time following the change in the data state information.

22. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor of a first device, cause the processor to:

receive, at a first communications interface of the first device from a second communications interface of the second device, messages included in a message stream, the message stream comprising a plurality of redundant messages; and

transmit, by the first communications interface to the second communications interface, an indication that at least one message of the message stream was received by the first device configured to cause the second device to terminate transmission of further messages included in the message stream to the first device.