Exchange of messages between devices in an electrical power system

• US 9,270,109 B2
• Filed: 03/15/2013
• Issued: 02/23/2016
• 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, Ewing, Christopher, Bennett, Jerry J
• Primary Examiner(s): Lazaro, David
• Assistant Examiner(s): Chang, Julian
• Application Number:
  US13/841,409
• Publication Number:
  US 20140280712A1
• Time in Patent Office: 1,075 Days
• Field of Search: 709230-235, 714748-749
• US Class Current: 1/1
• 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 at a first rate, from a first communications interface of the first device to a second communications interface of the second device, messages included in a first message stream, the first message stream comprising a plurality of first redundant messages;

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

terminating, in response to receiving the first indication, transmission of further first redundant messages included in the first message stream to the second device; and

transmitting at a second rate different than the first rate, in response to receiving the first indication, from the first communications interface of the first device to the second communications interface of the second device, a second message stream comprising a plurality of second redundant messages.

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

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

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

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

6. The method of claim 1, wherein the first 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 first redundant messages and receiving the first indication.

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

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

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

terminate, in response to receiving the first indication, transmission of further first redundant messages included in the first message stream to the second device; and

transmitting at a second rate different than the first rate, in response to receiving the first indication, from the first communications interface of the first device to the second communications interface of the second device, a second message stream comprising a plurality of second redundant messages.

9. The non-transitory computer-readable storage medium of claim 8, wherein the first redundant messages and the second redundant messages comprise GOOSE messages.

10. The non-transitory computer-readable storage medium of claim 8, wherein the first redundant messages and the second redundant messages each comprise a subscription identifier.

11. The non-transitory computer-readable storage medium of claim 8, wherein the first redundant messages and the second redundant messages message comprises data state information.

12. The non-transitory computer-readable storage medium of claim 8, wherein the first redundant messages comprise identical redundant copies.

13. The non-transitory computer-readable storage medium of claim 8, wherein the first redundant messages each comprise at least one identical portion.

14. The non-transitory computer-readable storage medium of claim 8, wherein the instructions further cause the processor to:

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

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

transmitting at a first message rate, a message stream of redundant messages from a first communications interface of a first device to a second communications interface of a second device;

upon detection of a state change, transmitting, from the first communications interface of the first device to the second communications interface of the second device, messages indicating the state change included in the message stream, the message stream comprising a plurality of further redundant messages at a second message rate;

receiving, at the first communications interface from the second communications interface, a first indication that at least one message of the message stream indicating the state change was received by the second device;

terminating, in response to receiving the first indication, transmission of further redundant copies of the message included in the message stream to the second device; and

transmitting the redundant messages of the message stream at the first message rate in response to the receiving the first indication and following the termination of the transmission of the further redundant messages at the second message rate.