System for visual monitoring of operational indicators in an electric power system

• US 5,805,813 A
• Filed: 07/26/1996
• Issued: 09/08/1998
• Est. Priority Date: 07/26/1996
• Status: Expired due to Term

• Current Assignee: Schweitzer Engineering Laboratories, Incorporated
• Original Assignee: Schweitzer Engineering Laboratories, Incorporated
• Inventors: Schweitzer, Edmund O. III
• Primary Examiner(s): Trammell, James P.
• Assistant Examiner(s): Bui, Bryan
• Application Number:
  US08/688,816
• Time in Patent Office: 774 Days
• Field of Search: 364/514 A, 364/550, 395/200.47, 348/142-143, 348/159, 348/174-175, 382/190, 382/203, 382/209, 382/218, 340/539, 340/506, 340/524, 340/637, 340/638, 340/825.29, 340/825.32, 340/825.06, 340/825.16, 340/825.17, 340/825.18, 340/500, 340/545, 340/556
• US Class Current: 709/217
• CPC Class Codes: G05B 23/0235 based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold
• CPC Class Codes: G05B 23/0286 Modifications to the monitored process, e.g. stopping operation or adapting control
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06V 20/10 Terrestrial scenes scenes under surveillance with static cameras G06V20/52; scenes perceived from the exterior of a vehicle G06V20/56; scenes perceived from the interior of a vehicle G06V20/59
• CPC Class Codes: G06V 2201/02 Recognising information on displays, dials, clocks
• CPC Class Codes: H02B 3/00 Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

A visual monitoring system for an electric power substation includes at least one camera for obtaining the image of various operational indicators in the substation, either within the control house, outdoors or both. The indicators could be the status of various gauges, including current, voltage and temperature gauges, or other structural elements, such as the position of various switches, the level of oil in a transformer sight glass, or whether a transformer fan is running, among others. The image is then enhanced to accentuate the desired features, and the desired data is then image detected. The resulting information is then compared against a standard to determine whether or not the operational status of the indicator is abnormal.

Claims

1. A system for visually monitoring the state of various operational indicators present in an electric power control or monitoring environment, including a substation, comprising:

means for obtaining an image of the status of a plurality of operational indicators in said electric power control or monitoring environment, wherein said image-obtaining means is positioned in a control house portion of the substation, aimed at indoor targets which include said operational indicators;

means for processing the image so as to enhance recognition of the status of the operational indicators; and

means for comparing the resulting processed image against a preselected standard to determine the state of the operational indicators.

2. A system of claim 1, including means for communicating said indicator state information to a remote location.

3. A system of claim 1, including means for developing a control signal from said comparing means if said indicator state is out-of-tolerance, said control signal being suitable for initiating corrective action.

4. A system of claim 3, wherein said corrective action is tripping a circuit breaker.

5. A system of claim 3, including a robot means responsive to said control signal for accomplishing said corrective action.

6. A system of claim 1, wherein said image-obtaining means is a camera.

7. A system of claim 1, wherein said indoor targets include gauges, protective relay target lights and circuit control switches.

8. A system of claim 1, including means for moving the camera between targets.

9. A system of claim 1, including means for illuminating the targets.

10. A system of claim 1, including means for visually enhancing the target so as to make said targets easier to recognize.

11. A system of claim 1, wherein image obtaining means are located both in a control house portion of the substation, aimed at indoor targets and in a substation yard, aimed at outdoor targets.

12. A system of claim 1, wherein the processing means includes means for digitizing the obtained image, means for enhancing the image, and means for detecting the features of the operational indicators within the image.

13. A system of claim 1, including means for obtaining sensory information in addition to the image information.

14. A system of claim 13, wherein said sensory information is auditory information.

15. A system of claim 13, wherein said sensory information is infrared information associated with the operation of a selected operational indicator.

16. A system of claim 13, wherein said sensory information is radio frequency information associated with the operation of a selected operational indicator.

17. A system for visually monitoring the state of various operational indicators present in an electric power control or monitoring environment, including a substation, comprising:

means for obtaining an image of the status of a plurality of operational indicators in said electric power control or monitoring environment, wherein said image-obtaining means is aimed at outdoor targets containing said operational indicators within a substation yard;

means for processing the image so as to enhance recognition of the status of the operational indicators; and

means for comparing the resulting processed image against a preselected standard to determine the state of the operational indicators.

18. A system of claim 17, wherein said outdoor targets include transformers, capacitor banks and switchgear.

19. A system of claim 17, including means for moving the camera between targets.

20. A system of claim 17, including means for communicating said indicator state information to a remote location.

21. A system of claim 17, including means for developing a control signal from said comparing means if said indicator state is out of tolerance, said control signal being suitable for initiating corrective action.

22. A system of claim 21, including a robot means responsive to said control signal for accomplishing said corrective action.

23. A system of claim 17, wherein said image-obtaining means is a camera.

24. A system of claim 17, including means for illuminating the targets.

25. A system of claim 17, including means for visually enhancing the targets so as to make said targets easier to recognize.

26. A system of claim 17, wherein the processing means includes means for digitizing the obtained image, means for enhancing the image, and means for detecting the features of the operational indicators within the image.

27. A system of claim 17, including means for obtaining sensory information in addition to the image information.