Electrical substation monitoring and diagnostics

• US 7,558,703 B2
• Filed: 11/01/2006
• Issued: 07/07/2009
• Est. Priority Date: 11/01/2006
• Status: Active Grant

• Current Assignee: Hitachi Energy Limited (Hitachi, Ltd.)
• Original Assignee: ABB Research Ltd. (ABB Limited)
• Inventors: Stoupis, James, Wang, Zhenyuan, Vu, Khoi, Mazza, Joe G., Lubkeman, David, Madwesh, Ajay C.
• Primary Examiner(s): TSAI, CAROL S W
• Application Number:
  US11/555,393
• Publication Number:
  US 20080103732A1
• Time in Patent Office: 979 Days
• Field of Search: 702/183, 702/182, 702/188, 709/220, 709/221, 709/222, 709/223, 709/228, 707/6, 707/E17.001, 707/E17.005, 707/E17.006, 707/204, 710/10, 710/316
• US Class Current: 702/183
• CPC Class Codes: G05B 23/0221 Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
• CPC Class Codes: Y10S 707/99936 Pattern matching access

Abstract

A substation intelligence system (104) includes a substation computer (105) which is operatively connected to a plurality of field devices (102) through an input/output subsystem (204). Data indicative of the devices is stored in a substation database (208). Advanced monitoring and/or diagnostics (107) use information from the database to perform various monitoring and/or diagnostic functions.

Claims

1. A tangible computer readable storage medium containing instructions which, when executed by a computer, cause the computer to carry out a method comprising:

retrieving data relevant to a first field device from a plurality of different databases in a substation intelligence system database system;

storing the retrieved data relevant to the first field device in a single data structure in the substation intelligence system database system;

retrieving data relevant to a second field device from the different databases in the substation intelligence system database system; and

storing the retrieved data relevant to the second field device in the data structure; and

wherein the retrieved data relevant to the first field device is stored in a first data unit within the data structure and the retrieved data relevant to the second field device is stored in a second data unit within the data structure.

2. The computer readable storage medium of claim 1 wherein the method further comprises communicating information from the database system to a human machine interface over a communications network.

3. The computer readable storage medium of claim 1, wherein the retrieved data relevant to the first and second field devices includes real time data.

4. The computer readable storage medium of claim 3 wherein the retrieved data relevant to the first and second field devices includes non operational data relating to a condition of one of the first and second field devices.

5. The computer readable storage medium of claim 3 wherein the retrieved data relevant to the first and second field devices includes at least one of historical data and alarm data.

6. The computer readable storage medium of claim 1 wherein the one or more analysis functions includes a field device predicative maintenance identification function.

7. The computer readable storage medium of claim 1 wherein the one or more analysis functions includes a field device incipient fault identification function.

8. The computer readable storage medium of claim 1 wherein the one or more analysis functions includes a field device reliability index calculation function.

9. The computer readable storage medium of claim 1 wherein the one or more analysis functions includes a fault diagnosis function.

10. The computer readable storage medium of claim 1 wherein the first and second field devices include at least one of an IED, a transformer, a circuit breaker, a feeder cable, and a capacitor bank.

11. The computer readable storage medium of claim 1 wherein the computer readable storage medium is part of a substation intelligence system that includes one or more of a substation automation system, a distribution automation system, and a feeder automation system.

12. A method comprising:

retrieving data relevant to a first field device from a plurality of different databases in a substation intelligence system database system;

storing the retrieved data relevant to the first field device in a single data structure in the substation intelligence system database system;

retrieving data relevant to a second field device from the different databases in the substation intelligence system database system; and

storing the retrieved data relevant to the second field device in the data structure; and

wherein the retrieved data relevant to the first field device is stored in a first data unit within the data structure and the retrieved data relevant to the second field device is stored in a second data unit within the data structure.

13. The method of claim 12 further comprising performing at least one of a substation monitoring function and a substation diagnostic function using the stored data.

14. The method of claim 13 wherein the performance of the at least one function occurs at a remote location, and wherein the method further comprises transferring the stored data to the remote location over a wide area network.

15. The method of claim 12 wherein the data structure includes operational and non-operational data.

16. The method of claim 12 wherein storing includes storing the data structure in a computer readable memory located at the substation.