Methods and apparatus for defining meter data calculations in an electronic electricity meter

• US 6,564,159 B1
• Filed: 06/29/2000
• Issued: 05/13/2003
• Est. Priority Date: 06/30/1999
• Status: Expired due to Term

• Current Assignee: Aclara Meters LLC (Hubbell, Inc.)
• Original Assignee: General Electric Company
• Inventors: Lavoie, Gregory P., Ouellette, Maurice J., Lee, Robert E. Jr., Elmore, David D.
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): Charioui, Mohamed
• Application Number:
  US09/606,270
• Time in Patent Office: 1,048 Days
• Field of Search: 702/57, 702/60, 702/61, 702/62, 702/64, 702/65, 702/80, 702/119, 702/123, 702/124, 702/183, 702/FOR.103, 702/FOR.104, 702/FOR.106, 702/FOR.134, 324/110, 324/142, 340/870.02, 340/870.03
• US Class Current: 702/62
• CPC Class Codes: G01R 21/133 by using digital technique
• CPC Class Codes: G01R 22/00 Arrangements for measuring time integral of electric power or current, e.g. electricity meters

Abstract

The present invention, in one embodiment, is a method for defining meter data calculations in an electronic electric meter. The method includes steps of: storing a set of predefined data calculation instructions in a non-volatile memory of the meter; storing a first set of vectors in a memory of the meter, the vectors pointing to data calculations of the set of predefined data calculation instructions; metering a plurality of electrical quantities of a power source; and controlling calculations performed on the metered electrical quantities in accordance with the data calculation instructions pointed to by the first stored set of vectors.

Claims

1. A method for defining meter data calculations in an electronic electric meter, said method comprising:

storing a set of predefined data calculation instructions in a non-volatile memory of the meter;

storing a first set of vectors in a memory of the meter, the vectors pointing to data calculations of the set of predefined data calculation instructions;

metering a plurality of electrical quantities of a power source;

controlling calculations performed on the metered electrical quantities in accordance with the data calculation instructions pointed to by the first stored set of vectors; and

calculating at least one of a momentary interval quantity, a one-minute meter defined sum, a one-minute user defined sum, a minute FIFO sum, a demand interval sum, and a load profile interval sum.

2. A method in accordance with claim 1 wherein storing a first set of vectors in a memory of the meter comprises the step of storing the first set of vectors in a non-volatile, reprogrammable memory of the meter.

3. A method in accordance with claim 2 further comprising the steps of reprogramming the non-volatile memory with a second set of vectors, and controlling calculations performed on metered electrical quantities in accordance with the data calculation instructions pointed to by the second stored set of vectors.

4. A method in accordance with claim 3 further comprising the step of downloading code into a reprogrammable, non-volatile memory of the meter to control the meter to compute and store a set of measurement profile values.

5. A method in accordance with claim 4 wherein the controlled calculations include calculations performed at a plurality of different periodic intervals.

6. A method in accordance with claim 5 wherein the plurality of different periodic intervals include intervals selected from the set consisting of momentary interval, end of minute interval, end of demand interval, end of demand subinterval, and end of profile interval.

7. A method in accordance with claim 4 further comprising the step of inputting and storing at least one value from an external source as a measurement profile value.

8. A method in accordance with claim 4 wherein downloading code into a reprogrammable, non-volatile memory of the meter to control the meter to compute a set of measurement profile values comprises the step of downloading a set of instructions defining user-defined functions to be used to compute the set of measurement profile values.

9. A method in accordance with claim 4 further comprising the step of totalizing a set of values using the set of measurement profile values.

10. A method in accordance with claim 4 further comprising the step of generating a set of demand values using the set of measurement profile values.

11. A method in accordance with claim 4 further comprising the step of generating a set of coincident demands using the set of measurement profile values.

12. A method in accordance with claim 4 further comprising the step of generating a set of power factors using the set of measurement profile values.

13. A method in accordance with claim 4 further comprising the step of generating a set of time-of-use summaries from the set of measurement profile values.

14. An electronic electric meter configured to:

store a set of predefined data calculation instructions in a non-volatile memory of said meter;

store a first set of vectors in a memory of said meter, said vectors pointing to data calculations of said set of predefined data calculation instructions;

meter a plurality of electrical quantities of a power source; and

calculate at least one of a momentary interval quantity, a one-minute meter defined sum, a one-minute user defined sum, a minute FIFO sum, a demand interval sum, and a load profile interval sum;

and said meter having a microcomputer configured to control calculations performed on the metered electrical quantities in accordance with said data calculation instructions pointed to by said first stored set of vectors.

15. A meter in accordance with claim 14 wherein said first set of vectors is stored in a non-volatile, reprogrammable memory of said meter.

16. A meter in accordance with claim 15 further configured to reprogram said non-volatile memory with a second set of vectors, and to control said calculations performed on metered electrical quantities in accordance with said data calculation instructions pointed to by said second stored set of vectors.

17. A meter in accordance with claim 16 further configured to store downloaded code into a reprogrammable, non-volatile memory of said meter to control said microcomputer to compute and to store a set of measurement profile values.

18. A meter in accordance with claim 17 wherein said controlled calculations include calculations performed at a plurality of different periodic intervals.

19. A meter in accordance with claim 18 wherein said plurality of different periodic intervals include intervals selected from the set consisting of momentary interval, end of minute interval, end of demand interval, end of demand subinterval, and end of profile interval.

20. A meter in accordance with claim 17 configured to input and store at least one value from an external source as a measurement profile value.

21. A meter in accordance with claim 17 wherein said meter being configured to store downloaded code into a reprogrammable, non-volatile memory of said meter to control said microprocessor to compute a set of measurement profile values comprises said meter being configured to store a set of instructions defining user-defined functions to be used to compute said set of measurement profile values.

22. A meter in accordance with claim 17 further configured to totalize a set of values using said set of measurement profile values.

23. A meter in accordance with claim 17 further configured to generate a set of demand values using said set of measurement profile values.

24. A meter in accordance with claim 17 further configured to generate a set of coincident demands using said set of measurement profile values.

25. A meter in accordance with claim 17 further configured to generate a set of power factors using said set of measurement profile values.

26. A meter in accordance with claim 17 further comprising the step of generating a set of time-of-use summaries from the set of measurement profile values.