Fuzzy time-of-use metering and consumption monitoring using load profile data from relative time transmit-only devices

• US 7,236,908 B2
• Filed: 11/29/2005
• Issued: 06/26/2007
• Est. Priority Date: 11/29/2005
• Status: Active Grant

• Current Assignee: Elster Electricity LLC (Honeywell International Inc.)
• Original Assignee: Elster Electricity LLC (Honeywell International Inc.)
• Inventors: Scoggins, Sean M., Timko, Kevin J.
• Primary Examiner(s): WACHSMAN, HAL D
• Application Number:
  US11/289,054
• Publication Number:
  US 20070124109A1
• Time in Patent Office: 574 Days
• Field of Search: 702/176, 702/61, 702/62
• US Class Current: 702/176
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: G07B 15/02 taking into account a variable factor such as distance or time, e.g. for passenger transport, parking systems or car rental systems G07B15/06 takes precedence; taximeters G07B13/00; parking meters per se G07F17/24; car rental systems per se G07B15/00
• CPC Class Codes: G07F 15/003 for electricity

Abstract

A system and method provide Time-of-Use (TOU) rate schedules that are bound by windows of time, i.e., a type of fuzzy switch time, which is bounded on both sides, rather than instantaneous switch times. The fuzzy TOU schedule defines the time of a tier switch as the end time of the first completed interval recorded after the start of some window of time. A monitoring system may be included that implements configurable usage filters that allow for the classification of usage in terms of interval data. Usage filters can be defined so that they are applied against individual interval readings, various aggregations of interval readings, and/or the statistical products of interval readings, etc. A filtering algorithm allows for the comparison of incoming and/or historical interval data against defined usage and schedule filters to determine if usage is abnormal and should be investigated further.

Claims

1. A method of applying a Time-of-Use (TOU) schedule to a relative-time metering device, comprising:

determining an expected TOU tier in accordance with a TOU tier switch time;

receiving interval data from said relative-time metering device;

assigning said interval data to a current tier associated with said relative-time metering device;

changing said current tier associated with said relative-time metering to said expected TOU tier if said current tier is not equal to said expected TOU tier; and

assigning subsequent interval data in said expected TOU tier.

2. The method of claim 1, further comprising defining said TOU tier switch time as a window of time having a maximum length equal to an interval over which said interval data is accumulated.

3. The method of claim 2, further comprising receiving interval data from plural relative-time metering devices, wherein each relative-time metering device communicates interval data within said window of time.

4. The method of claim 3, further comprising receiving a same number of intervals for each relative-time metering device for each expected TOU tier.

5. The method of claim 1, further comprising:

performing TOU calculations at a collector; and

providing an alert based on usage determined in a predetermined tier.

6. The method of claim 1, further comprising:

performing TOU calculations at a reading system; and

maintaining TOU schedules at said reading system.

7. A method of monitoring usage of a commodity, comprising:

defining usage filters that classify usage of said commodity in terms of interval data;

defining schedule filters in accordance with a Time-of-Use (TOU) schedule;

filtering interval data received from a relative-time metering device in accordance with said usage filters and said schedule filters; and

generating an alert if said interval data meets criteria specified by said usage filters and said schedule filters.

8. The method of claim 7, further comprising interfacing with a customer information system to obtain at least one of a usage rate and geographical information pertaining to said relative-time metering device.

9. The method of claim 7, further comprising communicating said alert to a remote device to inform a provider that said interval data meets said criteria.

10. The method of claim 7, further comprising analyzing said interval data based on collected historical interval data and said schedule filters to determine if said alert should be generated.

11. The method of claim 7, further comprising performing a statistical analysis on said interval data to determine variations in usage over a predetermined period of time.

12. The method of claim 7, further comprising collecting said interval data on approximately an hourly basis.

13. A system for determining usage of a commodity, comprising:

a relative-time metering device that measures commodity usage in intervals as interval data;

a collector that receives said interval data from said relative-time metering device; and

a reading system that receives said interval data from said collector,

wherein said system for determining usage of a commodity sets a time-of-use (TOU) schedule and TOU tier switch times are defined as occurring within a window of time separating a first TOU tier and a second TOU tier, and

wherein when said interval data associated with said relative-time metering device is received within said window of time, said interval data is assigned to said first TOU tier and a next interval data received from said relative-time metering device is assigned to said second TOU tier.

14. The system of claim 13, wherein said window has a maximum length equal to a collection time associated with said interval data.

15. The system of claim 14, wherein said collection time is approximately one hour.

16. The system of claim 13, wherein said collector aggregates interval data from plural relative-time metering devices and wherein said plural relative-time metering devices each collect said interval data for substantially the same amount of time per interval.

17. The system of claim 16, wherein said plural relative-time metering devices transmit said interval data at random times to said collector.

18. The system of claim 13, further comprising a monitoring system that generates alerts if said interval data meets criteria specified by usage filters that classify usage of said commodity in terms of interval data and schedule filters set in accordance with said TOU schedule.

19. The system of claim 18, further comprising an interface to a customer information system to obtain at least one of a usage rate and geographical information pertaining to said relative-time metering device.

20. The system of claim 18, further comprising analyzing said interval data based on collected historical interval data and said schedule filters to determine if said alerts should be generated.