Voltage rating validator for advanced metering
Systems and methods for determining a voltage meter rating for a utility meter connected to a distribution system via one or more distribution lines. The system accesses voltage measurements provided by a meter that represent a voltage at different time intervals. The system filters the voltage measurements to remove any voltage measurements that fall outside a voltage range for the distribution line. The system further determines a measured voltage rating from a set of candidate voltage ratings for the meter. The system compares a stored voltage rating for the meter and the measured voltage rating to determine a confidence level for the measured voltage rating. When the confidence level for measured voltage rating exceeds a confidence threshold, the system uses the measured voltage rating to maintain the distribution system.
1. A method for determining a voltage meter rating for a utility meter connected to a distribution system via a distribution line, the method comprising:
accessing a plurality of voltage measurements provided by a meter, wherein each of the plurality of voltage measurements represents a voltage at a different time interval;
filtering the plurality of voltage measurements to remove any voltage measurements that fall outside a voltage range for the distribution line;
determining a measured voltage rating from a plurality of candidate voltage ratings for the meter by:
determining a commonly recurring voltage from the filtered voltage measurements;
comparing the commonly recurring voltage to each of the plurality of candidate voltage ratings;
calculating, for each candidate voltage rating, a voltage difference between the commonly recurring voltage and the respective candidate voltage rating;
selecting one of the plurality of candidate voltage ratings having a smallest voltage difference; and
identifying the measured voltage rating as the selected one of the plurality of candidate voltage ratings;
accessing a stored voltage rating for the meter;
comparing the stored voltage rating for the meter and the measured voltage rating to determine a confidence level for the measured voltage rating; and
when the confidence level for the measured voltage rating does not meet a confidence threshold, then associating, in the distribution system, the stored voltage rating with the meter.
2. The method of claim 1 , wherein determining the commonly recurring voltage comprises:
when there is only one mode of the filtered voltage measurements, using the mode of the filtered voltage measurements as the commonly recurring voltage; and
when there are a plurality of modes of the filtered voltage measurements, selecting a largest mode from the plurality of modes of the filtered voltage measurements as the commonly recurring voltage.
3. The method of claim 1 , wherein comparing the stored voltage rating for the meter and the measured voltage rating to determine a confidence level for the measured voltage rating comprises:
when the stored voltage rating for the meter and the measured voltage rating match, then determining whether any of the filtered voltage measurements exceed the stored voltage rating; and
when a threshold number of the filtered voltage measurements exceed the stored voltage rating by a predetermined threshold, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating.
4. The method of claim 1 , wherein comparing the stored voltage rating for the meter and the measured voltage rating to determine a confidence level for the measured voltage rating comprises:
when the stored voltage rating for the meter corresponds to a higher voltage than the measured voltage rating, then determining whether any of the filtered voltage measurements are within a range around the stored voltage rating;
when at least one of the filtered voltage measurements is within the range around the stored voltage rating, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating; and
when none of the filtered voltage measurements is within the range around the stored voltage rating, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating.
5. The method of claim 1 , further comprising responsive to determining that the stored voltage rating for the meter is unavailable, identifying the meter as missing.
6. The method of claim 1 , further comprising responsive to determining that the commonly recurring voltage is above an expected maximum voltage for a measured rating, identifying the meter as indicating an over-voltage condition.
7. The method of claim 1 , further comprising responsive to determining that the commonly recurring voltage is below an expected minimum voltage, identifying the meter as indicating an under-voltage condition.
8. The method of claim 1 , wherein the plurality of candidate voltage ratings comprises 120 Volts, 208 Volts, 240 Volts, 277 Volts, and 480 Volts.
9. A method for determining a voltage meter rating of a utility meter connected to a distribution system via multiple distribution lines, the method comprising:
accessing, from a utility meter connected to a plurality of distribution lines, an initial voltage measurement for each of the plurality of distribution lines;
responsive to identifying, from the initial voltage measurements, a plurality of phases, performing operations for each phase of the utility meter comprising:
accessing a plurality of voltage measurements for a particular phase, wherein each of the plurality of voltage measurements represents a voltage at a different time interval;
filtering the plurality of voltage measurements to remove any voltage measurements that fall outside a voltage range for the distribution line;
determining a measured voltage rating from a plurality of candidate voltage ratings for the phase of the utility meter by:
determining a commonly recurring voltage from the filtered voltage measurements;
comparing the commonly recurring voltage to each of the plurality of candidate voltage ratings;
calculating, for each candidate voltage rating, a difference between the commonly recurring voltage and the respective candidate voltage rating;
selecting one of the plurality of candidate voltage ratings having a smallest voltage difference between the commonly recurring voltage and the measured voltage rating; and
identifying the measured voltage rating as the selected one of the plurality of candidate voltage ratings;
accessing a stored voltage rating for the utility meter;
comparing the stored voltage rating for the utility meter and the measured voltage rating to determine a confidence level for the measured voltage rating; and
when the confidence level for the measured voltage rating of each phase of the plurality of phases does not meet a confidence threshold, then associating in the distribution system, the stored voltage rating with the utility meter.
10. The method of claim 9 , wherein determining the commonly recurring voltage comprises:
when there is only one mode of the filtered voltage measurements, using the mode of the filtered voltage measurements as the commonly recurring voltage; and
when there are a plurality of modes of the filtered voltage measurements, selecting a largest mode from the plurality of modes of the filtered voltage measurements as the commonly recurring voltage.
11. The method of claim 9 , wherein comparing the stored voltage rating for the utility meter and the measured voltage rating to determine a confidence level for the measured voltage rating comprises:
when the stored voltage rating for the utility meter and the measured voltage rating match, then determining whether any of the filtered voltage measurements exceed the stored voltage rating; and
when a threshold number of the filtered voltage measurements exceed the stored voltage rating by a predetermined threshold, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating.
12. The method of claim 9 , wherein comparing the stored voltage rating for the utility meter and the measured voltage rating to determine a confidence level for the measured voltage rating comprises:
when the stored voltage rating for the utility meter corresponds to a higher voltage than the measured voltage rating, then determining whether any of the filtered voltage measurements are within a range around the stored voltage rating;
when at least one of the filtered voltage measurements is within the range around the stored voltage rating, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating; and
when none of the filtered voltage measurements is within the range around the stored voltage rating, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating.
13. The method of claim 9 , further comprising responsive to determining that the stored voltage rating for the utility meter is unavailable, identifying the utility meter as missing.
14. The method of claim 9 , further comprising responsive to determining that the commonly recurring voltage is above an expected maximum voltage for a measured rating, identifying the utility meter as indicating an over-voltage condition.
15. The method of claim 9 , further comprising responsive to determining that the commonly recurring voltage is below an expected minimum voltage, identifying the utility meter as indicating an under-voltage condition.
16. The method of claim 9 , wherein the plurality of candidate voltage ratings comprises 120 Volts, 177 Volts, 208 Volts, 240 Volts, 277 Volts, and 480 Volts.
17. A system for determining a voltage meter rating for a utility meter connected to a distribution system via a distribution line, the system comprising:
a non-transitory computer-readable medium storing computer-executable program instructions; and
a processing device communicatively coupled to the non-transitory computer-readable medium for executing the computer-executable program instructions, wherein executing the computer-executable program instructions configures the processing device to perform operations comprising:
accessing a plurality of voltage measurements provided by a meter, wherein each of the plurality of voltage measurements represents a voltage at a different time interval;
filtering the plurality of voltage measurements to remove any voltage measurements that fall outside a voltage range for the distribution line;
determining a measured voltage rating from a plurality of candidate voltage ratings for the meter by:
determining a commonly recurring voltage from the filtered voltage measurements;
comparing the commonly recurring voltage to each of the plurality of candidate voltage ratings;
calculating, for each candidate voltage rating, a voltage difference between the commonly recurring voltage and the respective candidate voltage rating;
selecting one of the plurality of candidate voltage ratings having a smallest voltage difference between the commonly recurring voltage and the measured voltage rating; and
identifying the measured voltage rating as the selected one of the plurality of candidate voltage ratings;
accessing a stored voltage rating for the meter;
comparing the stored voltage rating for the meter and the measured voltage rating to determine a confidence level for the measured voltage rating; and
when the confidence level for the stored voltage rating is below a confidence threshold, then associating in the distribution system, the stored voltage rating with the meter.
18. The system of claim 17 , wherein determining the commonly recurring voltage comprises:
when there is only one mode of the filtered voltage measurements, using the mode of the filtered voltage measurements as the commonly recurring voltage; and
when there are a plurality of modes of the filtered voltage measurements, selecting a largest mode from the plurality of modes of the filtered voltage measurements as the commonly recurring voltage.
19. The system of claim 17 , wherein comparing the stored voltage rating for the meter and the measured voltage rating to determine a confidence level for the measured voltage rating comprises:
when the stored voltage rating for the meter and the measured voltage rating match, then determining whether any of the filtered voltage measurements exceed the stored voltage rating; and
when a threshold number of the filtered voltage measurements exceed the stored voltage rating by a predetermined threshold, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating.
20. The system of claim 17 , wherein comparing the stored voltage rating for the meter and the measured voltage rating to determine a confidence level for the measured voltage rating comprises:
when the stored voltage rating for the meter corresponds to a higher voltage than the measured voltage rating, then determining whether any of the filtered voltage measurements are within a range around the stored voltage rating;
when at least one of the filtered voltage measurements is within the range around the stored voltage rating, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating; and
when none of the filtered voltage measurements is within the range around the stored voltage rating, then adjusting the confidence level to reflect a higher confidence in an accuracy of the measured voltage rating.