MONITORING OF PRIMARY DEVICES IN A POWER SYSTEM

• US 20140343895A1
• Filed: 08/01/2014
• Published: 11/20/2014
• Est. Priority Date: 02/01/2012
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: ABB Research Ltd. (ABB Limited)
• Inventors: HENCKEN, Kai, Schrag, Daniel, Krippner, Peter, Gemme, Carlo, Egman, Marco, Makela, Jarkko
• Granted Patent: US 10,302,702 B2
• Time in Patent Office: Days
• US Class Current: 702/183
• CPC Class Codes: G01R 31/327 Testing of circuit interrupters, switches or circuit-breakers
• CPC Class Codes: G01R 31/62 Testing of transformers
• CPC Class Codes: G05B 23/0224 Process history based detection method, e.g. whereby history implies the availability of large amounts of data

Abstract

For monitoring diagnostic rules of a power system, an exemplary method is disclosed and includes collecting operational diagnostic data from a first primary device; identifying a change of a diagnostic indicator based on the operational diagnostic data; adapting a diagnostic rule to the identified change, wherein the diagnostic rule is applicable to the diagnostic data for determining a diagnostic warning which indicates a diagnostic state of a primary device; and providing a diagnostic warning of a second primary device by applying the adapted diagnostic rule to operational diagnostic data collected for the second primary device.

Claims

1. A method for monitoring primary devices of a power system, the method comprising:

collecting operational diagnostic data from a first primary device, and determining health indicator data for the first primary device from readings of a sensor, or from a result of a remote query, or from manual inspection, or from regular services performed by a human on the first primary device;

identifying diagnostic correlation data from the health indicator data and correlated operational diagnostic data of the first primary device;

adapting a diagnostic rule to the identified diagnostic correlation data, wherein the diagnostic rule is applicable to operational diagnostic data for determining a diagnostic warning indicative of a health state of a primary device; and

providing a diagnostic warning of a second primary device by applying the adapted diagnostic rule to operational diagnostic data collected from the second primary device.

2. The method of claim 1, comprising:

indicating an error via the health indicator data of the identified diagnostic correlation data of the first primary device, wherein correlated operational diagnostic data precedes the error.

3. The method of claim 1, comprising:

collecting the operational diagnostic data from a plurality of similar first primary devices, and determining health indicator data for the plurality of similar first primary devices.

4. The method of claim 3, comprising:

identifying the correlated operational diagnostic data with a statistical evaluation of operational diagnostic data from the plurality of similar first primary devices.

5. The method of claim 3, comprising:

locating at least two of the primary devices at different industrial sites.

6. The method of claim 1, comprising:

relating the operational diagnostic data to an operational event of the first primary device.

7. The method of claim 1, comprising:

collecting the operational diagnostic data with at least one sensor at the first primary device.

8. The method of claim 1, comprising:

basing the operational diagnostic data on a physical quantity measured at the first primary device.

9. The method of claim 1, comprising:

collecting the operational diagnostic data with a first diagnostic device;

sending the operational diagnostic data to a central monitoring system;

identifying diagnostic correlation data and adapting the diagnostic rule in the central monitoring system; and

sending the modified diagnostic rule to a second diagnostic device.

10. The method of claim 1, comprising:

basing the diagnostic rule on a comparison between a threshold value and an actual value calculated from the operational diagnostic data, wherein the diagnostic rule is adapted by modifying the threshold value.

11. The method of claim 1, wherein the correlated operational diagnostic data includes additional offline data related to the first primary device.

12. The method of claim 1, wherein the first and second primary devices are medium voltage devices.

15. The method of claim 3, comprising:

relating the operational diagnostic data to an operational event of the first primary device.

16. The method of claim 15, comprising:

collecting the operational diagnostic data with at least one sensor at the first primary device.

17. The method of claim 16, comprising:

basing the operational diagnostic data on a physical quantity measured at the first primary device.

18. The method of claim 17, comprising:

collecting the operational diagnostic data with a first diagnostic device;

sending the operational diagnostic data to a central monitoring system;

identifying diagnostic correlation data and adapting the diagnostic rule in the central monitoring system; and

sending the modified diagnostic rule to a second diagnostic device.

19. The method of claim 18, comprising:

basing the diagnostic rule on a comparison between a threshold value and an actual value calculated from the operational diagnostic data, wherein the diagnostic rule is adapted by modifying the threshold value.

20. The method of claim 19, comprising:

wherein the correlated operational diagnostic data includes additional offline data related to the first primary device.

13. A computer program stored on a non-transitory computer-readable medium for monitoring primary devices of a power system, which when executed by a processor of a first diagnostic device or of a central monitoring system, will perform steps of:

receiving operational diagnostic data for a first primary device of the power system, and receiving health indicator data determined from readings of a sensor, or from a result of a remote query, or from manual inspection, or from regular services performed by a human on the first primary device;

identifying diagnostic correlation data from the health indicator data and correlated operational diagnostic data of the first primary device;

adapting a diagnostic rule to the identified diagnostic correlation data, wherein the diagnostic rule is applicable to operational diagnostic data for determining a diagnostic warning indicative of a health state of a primary device; and

sending the adapted diagnostic rule to a second diagnostic device.

14. A system comprising:

a non-transitory computer-readable medium, in which a computer program according to claim 13 is stored; and

a computer processor of a first diagnostic device or of a central monitoring system for executing the computer program.