Removing an automatic circuit recloser from service prior to battery failure

• US 20060039094A1
• Filed: 08/20/2004
• Published: 02/23/2006
• Est. Priority Date: 08/20/2004
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Brucker, David Stephen
• Granted Patent: US 7,403,130 B2
• Time in Patent Office: Days
• US Class Current: 361/71
• CPC Class Codes: G01R 31/3647 for determining the ability of a battery to perform a critical function, e.g. cranking
• CPC Class Codes: H02H 1/06 Arrangements for supplying operative power power supply arrangements in general G05F, H02M
• CPC Class Codes: H02H 3/06 with automatic reconnection

Abstract

An automatic circuit recloser is automatically removed from service prior to battery failure. Logic implemented on the automatic circuit recloser is used to determine whether a battery of the automatic circuit recloser may power operation of the automatic circuit recloser in place of a primary power source of the automatic circuit recloser is determined. The logic is also used to signal for the automatic circuit recloser to be automatically tripped when the battery may not power operation of the automatic circuit recloser in place of the primary power source. The logic also may be used to determine whether the battery is of a marginal quality in which the capability of the battery to power operation of the automatic circuit recloser is compromised, and to issue an alarm to indicate that the battery is of the marginal quality.

Claims

1. A method for automatically removing an automatic circuit recloser from service prior to battery failure, the method comprising:

determining, using logic implemented on an automatic circuit recloser, whether a battery of the automatic circuit recloser may power operation of the automatic circuit recloser in place of a primary power source of the automatic circuit recloser; and

signaling, using the logic, for the automatic circuit recloser to be tripped automatically when the battery may not power operation of the automatic circuit recloser in place of the primary power source.

2. The method of claim 1 wherein determining whether the battery may power operation of the automatic circuit recloser comprises:

calculating a compensated voltage for the battery;

comparing the compensated voltage to a trip voltage that represents the compensated voltage at or below which the battery may not power operation of the automatic circuit recloser; and

determining that the battery may not power operation of the automatic circuit recloser when the compensated voltage for the battery is less than the trip voltage.

3. The method of claim 2 wherein calculating the compensated voltage for the battery comprises:

measuring a voltage for the battery;

measuring an internal voltage drop for the battery; and

multiplying the measured internal voltage drop by a compensated voltage constant to produce a compensation factor; and

subtracting the compensation factor from the measured voltage to produce the compensated voltage.

4. The method of claim 3 wherein subtracting the compensation factor from the measured voltage comprises:

raising the compensation factor to a whole number power to produce a raised compensation factor; and

subtracting the raised compensation factor from the measured voltage to produce the compensated voltage.

5. The method of claim 3 wherein subtracting the compensation factor from the measured voltage comprises:

adding an ambient temperature correction factor to the compensation factor to produce a temperature corrected compensation factor;

raising the temperature corrected compensation factor to a whole number power to produce a raised compensation factor; and

subtracting the raised compensation factor from the measured voltage to produce the compensated voltage.

6. The method of claim 5 further comprising determining, using the logic, the ambient temperature correction factor based on an ambient temperature to which the automatic circuit recloser is exposed.

7. The method of claim 1 further comprising waiting, using the logic, for a trip delay amount of time after determining that the battery may not power operation of the automatic circuit recloser and before signaling for the automatic circuit recloser to be tripped.

8. The method of claim 1 further comprising:

determining, using the logic, whether the battery is of a marginal quality in which the capability of the battery to power operation of the automatic circuit recloser is compromised; and

issuing, using the logic, an alarm to indicate that the battery is of the marginal quality.

9. The method of claim 8 wherein determining whether the battery is of the marginal quality comprises:

calculating a compensated voltage for the battery;

comparing the compensated voltage to an alarm voltage that indicates a compensated voltage at or below which an alarm indicating that the battery is of the marginal quality is issued; and

issuing an alarm when the compensated voltage is less than the alarm voltage.

10. The method of claim 9 further comprising:

comparing, using the logic, the compensated voltage to an alarm reset voltage that represents a minimum compensated voltage at which an alarm that has been issued is removed; and

removing, using the logic, an alarm that has been issued when the compensated voltage is greater than the alarm reset voltage.

11. The method of claim 8 further comprising

determining, using the logic, whether the automatic circuit recloser is performing a protective action in response to a fault;

and

preventing, using the logic, an alarm that indicates that the battery is of the marginal quality from being issued when the automatic circuit recloser is performing a protective action in response to a fault.

12. The method of claim 1 further comprising

determining, using the logic, whether the automatic circuit recloser is performing a protective action in response to a fault;

and

preventing, using the logic, a signal for the automatic circuit recloser to be tripped automatically from being issued when the automatic circuit recloser is performing a protective action in response to a fault.

13. The method of claim 1 wherein determining whether the battery may power operation of the automatic circuit recloser comprises:

determining whether a previous determination as to whether the battery may power operation of the automatic circuit recloser has been made at a time within a minimum amount of time between tests of the battery from the present time; and

determining whether the battery may power operation of the automatic circuit recloser when a previous determination as to whether the battery may power operation of the automatic circuit recloser has not been made at a time within the minimum amount of time between tests of the battery from the present time.

14. The method of claim 1 wherein determining whether the battery may power operation of the automatic circuit recloser comprises:

determining whether a hot line tag has been applied to the automatic circuit recloser; and

determining whether the battery may power operation of the automatic circuit recloser when the hot line tag has been applied to the automatic circuit recloser.

15. The method of claim 1 wherein determining whether the battery may power operation of the automatic circuit recloser comprises:

determining whether a non-reclosing tag has been applied to the automatic circuit recloser; and

determining whether the battery may power operation of the automatic circuit recloser when the non-reclosing tag has been applied to the automatic circuit recloser.

16. The method of claim 1 wherein determining whether the battery may power operation of the automatic circuit recloser comprises:

determining whether the automatic circuit recloser has been energized;

determining a time at which the automatic circuit recloser was energized; and

determining whether the battery may power operation of the automatic circuit recloser when the time at which the automatic circuit recloser was energized is not within a minimum amount of time after recloser energization from the present time.

17. The method of claim 1 wherein determining whether the battery may power operation of the automatic circuit recloser comprises:

determining whether the power source has failed;

determining whether the power source failed at a time within a power loss time delay from the present time; and

determining whether the battery may power operation of the automatic circuit recloser when the power source failed at a time that is not within a power loss time delay from the present time.

18. The method of claim 1 further comprising:

determining, using the logic, a quality of the battery by comparing measurements of parameters that describe the quality of the battery to values of the parameters that are indicative of a good quality battery; and

signaling, using the logic, for the display of information describing the quality to an operator of the automatic circuit recloser.

19. The method of claim 18 wherein signaling for the display of information describing the quality comprises:

identifying a text message describing the quality of the battery; and

signaling for the display of the text message on a liquid crystal display screen that is viewed by the operator.

20. The method of claim 19 further comprising signaling, using the logic, for the liquid crystal display screen to be refreshed when a new text message to be displayed is identified.

21. The method of claim 18 wherein signaling for the display of information describing the quality comprises lighting one or more light emitting diodes to indicate the quality of the battery to the operator.

43. The system of claim 21 wherein the logic implemented on the automatic circuit recloser is included in a scratch logic portion of the recloser.

44. The system of claim 21 wherein the logic implemented on the automatic circuit recloser is included in a base logic portion of the recloser.

45. The system of claim 21 wherein the electrical system is a transmission circuit.

46. The system of claim 21 wherein the electrical system is an electrical substation.

22. A system for automatically removing an automatic circuit recloser from service prior to battery failure, the system comprising:

an automatic circuit recloser connected to an electrical system that protects the electrical system from damage due to faults on the electrical system;

logic implemented on the automatic circuit recloser for determining whether a battery of the automatic circuit recloser may power operation of the automatic circuit recloser in place of a primary power source of the automatic circuit recloser; and

logic implemented on the automatic circuit recloser for signaling for the automatic circuit recloser to be tripped automatically when the battery may not power operation of the automatic circuit recloser in place of the primary power source.

23. The system of claim 22 wherein the logic for determining whether the battery may power operation of the automatic circuit recloser comprises:

logic for calculating a compensated voltage for the battery;

logic for comparing the compensated voltage to a trip voltage that represents the compensated voltage at or below which the battery may not power operation of the automatic circuit recloser; and

logic for determining that the battery may not power operation of the automatic circuit recloser when the compensated voltage for the battery is less than the trip voltage.

24. The system of claim 23 wherein the logic for calculating the compensated voltage for the battery comprises:

logic for measuring a voltage for the battery;

logic for measuring an internal voltage drop for the battery; and

logic for multiplying the measured internal voltage drop by a compensated voltage constant to produce a compensation factor; and

logic for subtracting the compensation factor from the measured voltage to produce the compensated voltage.

25. The system of claim 24 wherein the logic for subtracting the compensation factor from the measured voltage comprises:

logic for raising the compensation factor to a whole number power to produce a raised compensation factor; and

logic for subtracting the raised compensation factor from the measured voltage to produce the compensated voltage.

26. The system of claim 24 wherein the logic for subtracting the compensation factor from the measured voltage comprises:

logic for adding an ambient temperature correction factor to the compensation factor to produce a temperature corrected compensation factor;

logic for raising the temperature corrected compensation factor to a whole number power to produce a raised compensation factor; and

logic for subtracting the raised compensation factor from the measured voltage to produce the compensated voltage.

27. The system of claim 26 further comprising logic implemented on the automatic circuit recloser for determining the ambient temperature correction factor based on an ambient temperature to which the automatic circuit recloser is exposed.

28. The system of claim 22 further comprising logic implemented on the automatic circuit recloser for waiting for a trip delay amount of time after determining that the battery may not power operation of the automatic circuit recloser and before signaling for the automatic circuit recloser to be tripped.

29. The system of claim 22 further comprising:

logic implemented on the automatic circuit recloser for determining whether the battery is of a marginal quality in which the capability of the battery to power operation of the automatic circuit recloser is compromised; and

logic implemented on the automatic circuit recloser for issuing an alarm to indicate that the battery is of the marginal quality.

30. The system of claim 29 wherein the logic for determining whether the battery is of the marginal quality comprises:

logic for calculating a compensated voltage for the battery;

logic for comparing the compensated voltage to an alarm voltage that indicates a compensated voltage at or below which an alarm indicating that the battery is of the marginal quality is issued; and

logic for issuing an alarm when the compensated voltage is less than the alarm voltage.

31. The system of claim 30 further comprising:

logic implemented on the automatic circuit recloser for comparing the compensated voltage to an alarm reset voltage that represents a minimum compensated voltage at which an alarm that has been issued is removed; and

logic implemented on the automatic circuit recloser for removing an alarm that has been issued when the compensated voltage is greater than the alarm reset voltage.

32. The system of claim 29 further comprising

logic implemented on the automatic circuit recloser for determining whether the automatic circuit recloser is performing a protective action in response to a fault;

and

logic implemented on the automatic circuit recloser for preventing an alarm that indicates that the battery is of the marginal quality from being issued when the automatic circuit recloser is performing a protective action in response to a fault.

33. The system of claim 22 further comprising

logic implemented on the automatic circuit recloser for determining whether the automatic circuit recloser is performing a protective action in response to a fault;

and

logic implemented on the automatic circuit recloser for preventing a signal for the automatic circuit recloser to be tripped automatically from being issued when the automatic circuit recloser is performing a protective action in response to a fault.

34. The system of claim 22 wherein the logic for determining whether the battery may power operation of the automatic circuit recloser comprises:

logic for determining whether a previous determination as to whether the battery may power operation of the automatic circuit recloser has been made at a time within a minimum amount of time between tests of the battery from the present time; and

logic for determining whether the battery may power operation of the automatic circuit recloser when a previous determination as to whether the battery may power operation of the automatic circuit recloser has not been made at a time within the minimum amount of time between tests of the battery from the present time.

35. The system of claim 22 wherein the logic for determining whether the battery may power operation of the automatic circuit recloser comprises:

logic for determining whether a hot line tag has been applied to the automatic circuit recloser; and

logic for determining whether the battery may power operation of the automatic circuit recloser when the hot line tag has been applied to the automatic circuit recloser.

36. The system of claim 22 wherein the logic for determining whether the battery may power operation of the automatic circuit recloser comprises:

logic for determining whether a non-reclosing tag has been applied to the automatic circuit recloser; and

logic for determining whether the battery may power operation of the automatic circuit recloser when the non-reclosing tag has been applied to the automatic circuit recloser.

37. The system of claim 22 wherein the logic for determining whether the battery may power operation of the automatic circuit recloser comprises:

logic for determining whether the automatic circuit recloser has been energized;

logic for determining a time at which the automatic circuit recloser was energized; and

logic for determining whether the battery may power operation of the automatic circuit recloser when the time at which the automatic circuit recloser was energized is not within a minimum amount of time after recloser energization from the present time.

38. The system of claim 22 wherein the logic for determining whether the battery may power operation of the automatic circuit recloser comprises:

logic for determining, whether the power source has failed;

logic for determining, whether the power source failed at a time within a power loss time delay from the present time; and

logic for determining whether the battery may power operation of the automatic circuit recloser when the power source failed at a time that is not within a power loss time delay from the present time.

39. The system of claim 22 further comprising:

logic implemented on the automatic circuit recloser for determining a quality of the battery by comparing measurements of parameters that describe the quality of the battery to values of the parameters that are indicative of a good quality battery; and

logic implemented on the automatic circuit recloser for signaling for the display of information describing the quality to an operator of the automatic circuit recloser.

40. The system of claim 39 wherein the logic for signaling for the display of information describing the quality comprises:

logic for identifying a text message describing the quality of the battery; and

logic for signaling for the display of the text message on a liquid crystal display screen that is viewed by the operator.

41. The system of claim 40 further comprising logic implemented on the automatic circuit recloser for signaling for the liquid crystal display screen to be refreshed when a new text message to be displayed is identified.

42. The system of claim 39 wherein the logic for signaling for the display of information describing the quality comprises logic for lighting one or more light emitting diodes to indicate the quality of the battery to the operator.