Recording of operating parameters of an intelligent electronic device

Patent metadata

Field	Value
Publication number	US-9581976-B2
Application number	US-201213668737-A
Country	US
Kind code	B2
Filing date	Nov 5, 2012
Priority date	Nov 5, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

The present disclosure provides systems and methods for recording operating parameters of an intelligent electronic device (IED). A system may include a parameter acquisition module, a parameter storage module, and a memory management module. The parameter acquisition module may be configured to periodically obtain operating parameters of an IED at a first interval. The first interval may have a first time length to provide a first resolution of operation of the IED. The parameter storage module may be configured to store the operating parameters. The memory management module may be configured to delete, outside a first resolution period, a first portion of the operating parameters while maintaining a second portion of the operating parameters. The second portion may include operating parameters for each of a second interval. The second interval may have a second time length to provide a reduced second resolution of the operation of the IED.

First claim

What is claimed:

1. A system for recording operating parameters of an intelligent electronic device (IED) comprising:
an IED operating within an electric power delivery system, configured to obtain electric power system operating parameters and configured to record electric power system operating parameters and IED operating parameters; and
a record module comprising:
a parameter acquisition module configured to continuously obtain IED operating parameters of the IED at a first resolution having a first interval having a first time length;
a parameter storage module configured to store the obtained IED operating parameters to provide stored IED operating parameters at the first resolution; and
a memory management module configured to delete, outside a first resolution period, a first portion of the IED operating parameters while maintaining a second portion of the IED operating parameters, wherein the second portion comprises IED operating parameters for each second interval having a second time length to provide a reduced second resolution of the operation of the IED;
wherein the memory management module is further configured to identify an IED event and to delete outside of a third interval a third portion of the IED operating parameters while maintaining the IED operating parameters for the third interval associated with the IED event, the third interval having a third time length;
wherein the parameter storage module is further configured to store the IED operating parameters at the second resolution and the IED operating parameters for the third interval associated with the IED event.

2. The system of claim 1 , wherein the parameter storage module is configured to store the IED operating parameters on independent memory.

3. The system of claim 1 , wherein the record module is integrated with the IED.

4. The system of claim 1 , wherein the record module comprises discrete hardware separate from the IED.

5. The system of claim 4 , wherein the record module is at least partially mounted within the IED.

6. The system of claim 5 , wherein the record module communicates with the IED via an internal bus.

7. The system of claim 4 , wherein the record module is externally mounted from the IED and communicates with the IED via a communication interface.

8. The system of claim 6 , wherein the communication interface comprises an Ethernet connection.

9. The system of claim 1 , wherein the record module is configured to store IED operating parameters of one or more additional IEDs.

10. The system of claim 1 , wherein the IED comprises a digital protective relay.

11. The system of claim 1 , wherein the stored IED operating parameters are remotely accessible.

12. An apparatus for recording IED operating parameters of an intelligent electronic device (IED) in an electric power delivery system, the IED configured to obtain electric power system operating parameters from an electric power delivery system and configured to obtain IED operating parameters, the apparatus comprising:
a parameter acquisition module configured to continuously obtain IED operating parameters of the IED at a first resolution having a first interval having a first time length;
a parameter storage module configured to store the obtained IED operating parameters to provide stored IED operating parameters at the first resolution; and
a memory management module configured to delete, outside a first resolution period, a first portion of the IED operating parameters while maintaining a second portion of the IED operating parameters, wherein the second portion comprises IED operating parameters for each second interval having a second time length to provide a reduced second resolution of the operation of the IED;
wherein the memory management module is further configured to identify an IED event and to delete outside of a third interval a third portion of the IED operating parameters while maintaining the IED operating parameters for the third interval associated with the IED event, the third interval having a third time length;
wherein the parameter storage module is further configured to store the IED operating parameters at the second resolution and the IED operating parameters for the third interval associated with the IED event.

13. A non-transitory computer-readable medium having instructions encoded thereon, the instructions configured to be executed by a processor to:
continuously obtain IED operating parameters of an IED related to operation of the IED, at a first resolution having a first interval having a first time length;
store the obtained IED operating parameters to provide stored IED operating parameters at the first resolution; and
delete, outside a first resolution period, a first portion of the IED operating parameters while maintaining a second portion of the IED operating parameters, wherein the second portion comprises IED operating parameters for each second interval having a second time length to provide a reduced second resolution of the operation of the IED;
identify an IED event and to delete outside of a third interval a third portion of the IED operating parameters while maintaining the IED operating parameters for the third interval associated with the IED event, the third interval having a third time length;
store the IED operating parameters at the second resolution and the IED operating parameters for the third interval associated with the IED event.

14. A method for monitoring an intelligent electronic device (IED) in an electric power delivery system, the IED configured to obtain electric power system operating parameters, the method comprising:
continuously obtaining IED operating parameters of an IED related to operation of the IED at a first resolution having a first interval having a first time length, the IED configured to manage operation of a portion of an electric power delivery system; and
storing the obtained IED operating parameters to provide stored IED operating parameters at the first resolution in independent memory for a life-time of the IED;
deleting, outside a first resolution period, a first portion of the IED operating parameters while maintaining a second portion of the IED operating parameters, wherein the second portion comprises IED operating parameters for each second interval having a second time length to provide a reduced second resolution of the operation of the IED;
identifying an IED event and to delete outside of a third interval portion of the IED operating parameters while maintaining the IED operating parameters for the third interval associated with the IED event, the third interval having a third time length;
storing the IED operating parameters at the second resolution and the IED operating parameters for the third interval associated with the IED event.

15. The method of claim 14 , wherein the first time length comprises about one millisecond and the second time length comprises about one second.

16. The method of claim 14 , further comprising requesting IED operating parameters from the IED.

17. The method of claim 16 , wherein requesting IED operating parameters comprises requesting via a communication interface.

18. The method of claim 17 , wherein the communication interface comprises an ethernet connection.

19. The method of claim 14 , wherein the IED operating parameters comprises an indicator indicating whether a parameter is within a predefined operating window.

20. The method of claim 19 , wherein obtaining the IED operating parameters comprises comparing an IED

Assignees

• Schweitzer Engineering Lab Inc

Inventors

• Schweitzer Iii Edmund O
• Schwartz Ronald A
• Whitehead David E

Classifications

• G05B9/02 Primary

  electric · CPC title

• G05B2219/25066

  Configuration stored in each unit · CPC title

• G06F11/00

  Error detection; Error correction; Monitoring (error detection, correction or monitoring in information storage based on relative movement between record carrier and transducer G11B20/18; monitoring, i.e. supervising the progress of recording or reproducing G11B27/36; in static stores G11C29/00) · CPC title

• G06F11/008

  Reliability or availability analysis · CPC title

• G06F11/3062

  where the monitored property is the power consumption (power management in a computing system G06F1/3203) · CPC title