Transformer management system and method

• US 20020161558A1
• Filed: 02/28/2001
• Published: 10/31/2002
• Est. Priority Date: 02/28/2001
• Status: Active Grant

• Current Assignee: Bruno Georges, Claude Beauchemin, Estelle Gagnon, Mariana Barbulescu
• Original Assignee: Bruno Georges, Claude Beauchemin, Estelle Gagnon, Mariana Barbulescu
• Inventors: Beauchemin, Claude, Gagnon, Estelle, Barbulescu, Mariana, Georges, Bruno
• Granted Patent: US 6,906,630 B2
• Time in Patent Office: Days
• US Class Current: 702/189
• CPC Class Codes: G05B 23/0245 based on a qualitative model, e.g. rule based; if-then decisions
• CPC Class Codes: G05B 23/0264 Control of logging system, e.g. decision on which data to store; time-stamping measurements

Abstract

A transformer management system and method involves using sensors to sense physical quantities associated with the operation of a transformer. Processing circuitry uses the sensed physical quantities to calculate values from mathematical models for representing behavior of the transformer. These calculated values are compared to threshold values and an output is generated based on the result of the comparison.

Claims

1. A transformer management system, comprising:

at least one sensor for sensing at least one physical quantity associated with the operation of a transformer; and

processing circuitry for using the at least one sensed physical quantity to calculate a value from a mathematical model for representing behavior of the transformer, for comparing the calculated value to a threshold value, and for generating an output based on the result of the comparison.

2. The transformer management system according to claim 1, wherein the processing circuitry also uses an output from the mathematical model to calculate a value for another mathematical model.

3. The transformer management system according to claim 1, wherein the at least one sensor comprises an analog sensor.

4. The transformer management system according to claim 1, wherein the at least one sensor comprises a digital sensor.

5. The transformer management system according to claim 1, wherein the at least one sensor comprises an analog first sensor and a digital second sensor.

6. The transformer management system according to claim 1, wherein the output generated by the processing circuitry comprises an alarm.

7. The transformer management system according to claim 1, wherein the output generated by the processing circuitry comprises a cooling system ON/OFF signal.

8. The transformer management system according to claim 1, further comprising:

communication circuitry for communication with a remotely located processing system.

9. The transformer management system according to claim 8, further comprising:

an interface for at least providing inputs to and receiving outputs from the processing circuitry.

10. The transformer management system according to claim 1, wherein the processing circuitry comprises a programmable logic controller.

11. The transformer management system according to claim 1, further comprising:

a memory for storing one or more sensed physical quantities.

13. The method according to claim 12, wherein the output comprises an alarm.

14. The method according to claim 12, wherein the output comprises a transformer cooling system ON/OFF signal.

15. The method according to claim 12, further comprising:

storing one or more sensed physical quantities.

16. The method according to claim 12, wherein the at least one sensed physical quantity comprises an analog physical quantity.

17. The method according to claim 12, wherein the at least one sensed physical quantity comprises a digital physical quantity.

18. The method according to claim 12, wherein the at least one sensed physical quantity comprises an analog first physical quantity and a digital second physical quantity.

19. The method according to claim 12, further comprising:

communicating with a remotely located processing system.

12. A method of managing a transformer, comprising:

sensing at least one physical quantity associated with the operation of a transformer;

using the at least one sensed physical quantity to calculate a value from a mathematical model for representing the behavior of the transformer;

comparing the calculated value to a threshold value; and

generating an output based on the result of the comparison.

20. A transformer management system, comprising:

a plurality of transformer management units, each unit comprising at least one sensor for sensing at least one physical quantity associated with the operation of an associated transformer, processing circuitry for using the at least one sensed physical quantity to calculate a value from a mathematical model for representing behavior of the transformer, for comparing the calculated value to a threshold value, and for generating an output based on the result of the comparison; and

a remote processing system in communication with the plurality of transformer management units.

21. The transformer management system according to claim 20, wherein the remote processing system is in communication with the plurality of transformer management units via a wired communication link.

22. The transformer management system according to claim 21, wherein the wired communication link is the Internet.

23. The transformer management system according to claim 20, wherein the remote processing system is in communication with the plurality of transformer management units via a wireless communication link.

24. The transformer management system according to claim 20, wherein the processing circuitry of each transformer management unit also uses an output from the mathematical model to calculate a value for another mathematical model.

25. The transformer management system according to claim 20, wherein the at least one sensor of each transformer management unit comprises an analog sensor.

26. The transformer management system according to claim 20, wherein the at least one sensor of each transformer management unit comprises a digital sensor.

27. The transformer management system according to claim 20, wherein the at least one sensor of each transformer management unit comprises an analog first sensor and a digital second sensor.

28. The transformer management system according to claim 20, wherein the output generated by the processing circuitry of each transformer management system comprises an alarm.

29. The transformer management system according to claim 20, wherein the output generated by the processing circuitry of each transformer management unit comprises a cooling system ON/OFF signal.

30. A method of managing a transformer, comprising:

(a) initializing operation of a transformer management system, the initializing comprising writing and updating of constants used by the transformer management system and generating flags and triggers used to used to synchronize execution of at least one function and at least one model of the transformer management system;

(b) inputting at least one sensor signal to the transformer management system and validating the sensor signal;

(c) determining whether a computation of a model of the transformer management system is scheduled;

(d) performing a scheduled model computation using the at least one sensor signal;

(e) comparing an output of the model computation with a predetermined value; and

(f) generating a transformer management system output based on the comparing.

31. The method according to claim 30, wherein the transformer management system output comprises an alarm.

32. The method according to claim 30, wherein the transformer management system output comprises a transformer cooling system ON/OFF signal.

33. The method according to claim 30, further comprising:

storing the at least one sensor signal.

34. The method according to claim 30, wherein the at least one sensor signal represents an analog physical quantity.

35. The method according to claim 30, wherein the at least one sensor signal represents a digital physical quantity.

36. The method according to claim 30, wherein the at least one sensor signal includes a first sensor signal representing an analog physical quantity and second sensor signal representing a digital physical quantity.

37. The method according to claim 30, further comprising:

communicating with a remotely located processing system.

38. The method according to claim 30, further comprising:

generating date and time data and synchronizing the generated date and time data with reference date and time data.

39. The method according to claim 30, further comprising:

continuously repeating steps (b)-(f).

40. A transformer management system, comprising:

at least one sensor for sensing at least one physical quantity associated with the operation of a transformer;

a programmable logic controller for using the at least one sensed physical quantity to calculate a value from a mathematical model for representing behavior of the transformer, for comparing the calculated value to a threshold value, and for generating a cooling system ON/OFF signal based on the result of the comparison;

an interface for at least providing inputs to and receiving outputs from the processing circuitry; and

communication circuitry for communication with a remotely located processing system,

wherein the processing circuitry also uses an output from the mathematical model to calculate values for another mathematical model.