System and method for estimating energy consumption based on readings from an AMI network

• US 9,601,004 B2
• Filed: 06/25/2012
• Issued: 03/21/2017
• Est. Priority Date: 06/25/2012
• Status: Active Grant

• Current Assignee: Itron, Inc.
• Original Assignee: Comverge Incorporated (Itron, Inc.)
• Inventors: Miyaji, Wendell, Rossi, John
• Primary Examiner(s): Backer, Firmin
• Assistant Examiner(s): MURPHY, JEROLD B
• Application Number:
  US13/532,160
• Publication Number:
  US 20130342359A1
• Time in Patent Office: 1,730 Days
• US Class Current: 1/1
• CPC Class Codes: G01D 2204/12 Determination or prediction of behaviour, e.g. likely power consumption or unusual usage patterns
• CPC Class Codes: G01D 2204/45 Utility meters networked together within a single building
• CPC Class Codes: G01D 4/002 Remote reading of utility meters
• CPC Class Codes: G08C 17/02 using a radio link
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

A method and system for estimating energy consumption of a utility population includes organizing the utility population comprising energy consumers into a plurality of groups. Next, a distribution of energy consumption against the plurality of groups may be calculated. Subsequently, statistically representative groups based on the energy distribution and the plurality of groups may be determined. Data is then collected from the statistically representative groups at predefined intervals from a communications network. Energy consumption of the utility population may then be estimated based on the data collected from the statistically representative groups. The communications network comprises an advanced metering infrastructure (AMI) network.

Claims

1. A computer implemented method for estimating energy consumption of an entire utility population of participants in a demand response program by sampling meters of statistically representative groups at different time intervals, the method comprising:

a processor for organizing the entire utility population comprising energy consumers into a plurality of groups, wherein each member of a group has one or more similar features that relate to a single utility, each member having a meter for measuring consumption of the single utility and which is coupled only to a meter-based communications network in which each meter comprises an antenna for radio-frequency communications;

a processor for calculating a distribution of energy consumption against the plurality of groups;

a processor for forming the statistically representative groups based on the distribution of energy consumption and the plurality of groups, a total number of members for all of the statistically representative groups having a magnitude which is smaller than the total utility population of all participants in the demand response program, each statistically representative group is formed such that when energy measurements for members of the statistically representative groups are added together to produce a group total, an estimated performance for the entire utility population is calculated by the processor from the group total;

a processor for collecting data from the statistically representative groups at predefined time intervals from the meters coupled to the meter-based communications network, the data collected from the meters of the statistically representative groups being less than collecting data from the entire utility population, the processor collects the data from each statistically representative group at a designated different single predefined time interval relative to each statistically representative group within all of the statistically representative groups, the processor collecting data from meters of each statistically representative group at a different predefined time interval and the processor collecting data from only meters of statistically representative groups instead of the entire utility population substantially reduces communications bandwidth consumed by the processor over the meter-based communications network while also reducing a number of calculations needed to estimate energy consumption of the entire utility population; and

a processor for estimating energy consumption of the entire utility population based on the data collected from the meters of the statistically representative groups.

2. The method of claim 1, wherein the communications network comprises an advanced metering infrastructure (AMI) network.

3. The method of claim 2, wherein the AMI network comprises at least one of an RF mesh network, a PLC network, and a paging network.

4. The method of claim 2, wherein the AMI network comprises meters of group members equipped with wireless radios or PLC transceivers.

5. The method of claim 1, further comprising a processor for adjusting each statistically representative group for bias.

6. The method of claim 5, further comprising a processor for dividing each statistically representative group in to a plurality of subgroups.

7. The method of claim 6, further comprising a processor for applying cycling commands to at least one of the subgroups for reducing an electrical load.

8. The method of claim 6, further comprising a processor for applying a temperature offset to thermostats in at least one of the subgroups for reducing an electrical load.

9. The method of claim 1, wherein organizing the utility population comprising energy consumers into a plurality of groups further comprises organizing the utility population according to at least one of the following parameters:

energy consumption of a HVAC system;

type of heating, ventilating, air-conditioning (HVAC) equipment;

size of HVAC equipment;

age of HVAC equipment;

percentage of exposure to sunlight for each climate controlled space coupled to the HVAC equipment for a particular HVAC system; and

the size of each climate controlled space for a particular HVAC system.

10. The method of claim 1, further comprising a processor for issuing cycling commands to one or more members of the utility population.

11. The method of claim 10, further comprising a processor for calculating energy savings based on the issuance of cycling commands.

12. The method of claim 1, further comprising a processor for applying a temperature offset to thermostats in at least one of the subgroups for reducing an electrical load.

13. A computer program product comprising a non-transitory computer usable medium having a computer readable program code embodied therein, said computer readable program code adapted to be executed to implement a method for estimating energy consumption of an entire utility population of participants in a demand response program by sampling statistically representative groups at different time intervals, said method comprising:

organizing the entire utility population comprising energy consumers into a plurality of groups, wherein each member of a group has one or more similar features that relate to a single utility, each member having a meter for measuring consumption of the single utility and which is coupled only to a meter-based communications network in which each meter comprises an antenna for radio-frequency communications;

calculating a distribution of energy consumption against the plurality of groups;

forming statistically representative groups based on the distribution of energy consumption and the plurality of groups, a total number of members for all of the statistically representative groups having a magnitude which is smaller than the total utility population of all participants in the demand response program, each statistically representative group is formed such that when energy measurements for members of the statistically representative groups are added together to produce a group total, an estimated performance for the entire utility population is calculated from the group total;

collecting data from the statistically representative groups at predefined intervals from the meters coupled to the meter-based communications network, the data collected from the meters of the statistically representative groups being less than collecting data from the entire utility population, the processor collects the data from each statistically representative group at a designated different single predefined time interval relative to each statistically representative group within all of the statistically representative groups, the processor collecting data from meters of each statistically representative group at a different predefined time interval and the processor collecting data from only meters of statistically representative groups instead of the entire utility population substantially reduces communications bandwidth consumed by the processor over the meter-based communications network while also reducing a number of calculations needed to estimate energy consumption of the entire utility population; and

estimating energy consumption of the entire utility population based on the data collected from the meters of the statistically representative groups.

14. The computer program product of claim 13, wherein the communications network comprises an advanced metering infrastructure (AMI) network.

15. The computer program product of claim 14, wherein the AMI network comprises at least one of an RF mesh network, a PLC network, and a paging network.

16. The computer program product of claim 14, wherein the AMI network comprises meters of group members equipped with wireless radios or PLC transceivers.

17. The computer program product of claim 13, wherein the program code implementing the method further comprises adjusting each statistically representative group for bias.

18. The computer program product of claim 13, wherein the program code implementing the method further comprises dividing each statistically representative group in to a plurality of subgroups.

19. The computer program product of claim 18, wherein the program code implementing the method further comprises applying cycling commands to at least one of the subgroups for reducing an electrical load.

20. The computer program product of claim 18, wherein the program code implementing the method further comprises applying a temperature offset to at least one of the subgroups for reducing an electrical load.