Systems, methods, and apparatus for determining energy savings

• US 9,691,111 B2
• Filed: 01/06/2012
• Issued: 06/27/2017
• Est. Priority Date: 01/06/2012
• Status: Active Grant

• Current Assignee: Aclara Meters LLC (Hubbell, Inc.)
• Original Assignee: Aclara Meters LLC (Hubbell, Inc.)
• Inventors: Ree, Bradley Richard
• Primary Examiner(s): Masinick, Michael D
• Application Number:
  US13/345,335
• Publication Number:
  US 20130178995A1
• Time in Patent Office: 1,999 Days
• Field of Search: 700297, 700298, 700291, 700295
• CPC Class Codes: G06Q 50/06 Energy or water supply

Abstract

A system, method, and apparatus for determining energy savings are provided. The method may include repeatedly measuring energy usage of a load, determining that a demand response load control event exists, modifying the cycle of operation based at least in part on determining that a demand response load control event exists, and determining an energy savings based on comparing the measured energy usage of the load with an energy usage statistic. The determining that the demand response load control event exists may include receiving a demand response load control notification. The modifying the cycle of operation may include reducing a power draw of the load.

Claims

1. A method for determining energy power savings for a load under certain weather conditions comprising:

determining, by a load controller operating at an end user location, that a load is running in a predetermined manner, the load controller being operatively connected to both the load and to power transmission lines by which power from a power distribution system of a power utility is supplied to the load;

repeatedly measuring, by the load controller, energy usage of the load;

determining, by a demand response load control (DRLC) determination controller associated with the power distribution system, that, by predictive analysis based on current weather forecast data obtained at time intervals during a day, historical statistical power consumption data associated with the load for past weather conditions and related to the current weather forecast data for corresponding time intervals, and current power usage information, that either a power savings mode or a DRLC event should be initiated, the DRLC determination controller, upon reaching said determination of a power savings mode or DRLC event, notifying the load controller for the end user location;

the load controller for the end user location, upon receiving said notification, modifying operation of the load by modifying the load'"'"'s cycle of operation if the load is in operation, delaying a start in the load'"'"'s operation if the load is not already in operation, once the load is in operation if the load is allowed to operate or, if the load is already in operation, changing a set point which would allow the load to otherwise draw more power, and including performing all of these actions, thereby reducing a power draw of the load so the load consumes less power than if there were no power saving mode or DRLC event;

the DRLC determination controller, upon determining that said power saving mode or DRLC event is over, notifying the load controller for the end user location;

calculating, by the load controller, a resultant energy savings by comparing measured energy usage by the load during the power savings mode or DRLC event with energy usage statistics for power consumption of the load when no power saving mode or DRLC event had occurred during a period of similar weather forecast conditions for corresponding time intervals; and

transmitting by the load controller the calculated energy savings over a communications link to the power utility.

2. The method of claim 1, wherein the determining that current operation of the load comprises measuring at least one of the load'"'"'s current and voltage by the load controller at the end user location.

3. The method of claim 1, wherein repeatedly measuring energy usage by the load comprises repeatedly measuring at least one current and at least one voltage by the load controller at the end user location.

4. The method of claim 1, wherein modifying the cycle of operation of the load comprises reducing the power drawn by the load to substantially zero.

5. The method of claim 1, wherein the energy usage statistic is based, at least in part, on the repeatedly measured energy usage of the load when no power saving mode or DRLC event exists.

6. The method of claim 1, further comprising updating a negative time of use register based upon the energy savings.

7. The method of claim 6, further comprising storing information on the negative time of use in a memory of the load controller at the end user location.

8. The method of claim 1, further comprising the DRLC determination controller transmitting a user notification message to the end user associated end user location that the power savings mode or the DRLC event has been determined by the power utility.

9. An apparatus comprising:

at least one detector determining power consumption of a load;

a communicative link receiving a demand response load control (DRLC) notification or a power saving mode notification from a DRLC determination controller associated with a power distribution system to the load and to which the apparatus is communicatively connected;

a load controller determining that, if the load is running, the load is running according to a predetermined mode of operation and controlling power supplied to the load in accordance therewith; and

an electronic memory storing energy usage statistics including historical statistical power consumption data associated with the load for past weather conditions related to a current weather forecast data for corresponding time intervals,

wherein the load controller changes the amount of power supplied to the load based, at least in part, on receiving a first notification from the DRLC determination controller indicating that either a power saving mode or a DRLC event has been determined and receiving a second notification from the DRLC determination controller indicating that the power saving mode or DRLC event no longer exists, wherein the DRLC substantially corresponds to the length of the power saving mode or DRLC event, the first notification being generated by the DRLC determination controller based, at least partially, on a determination that current power usage by a plurality of loads is above a predetermined value and a predictive analysis by the DRLC determination controller of anticipated power consumption,

wherein the predictive analysis is based, at least partially, on current weather forecast data obtained at time intervals during a day and the historical statistical power consumption data associated with the load for past weather conditions related to the current weather forecast data for corresponding time intervals, and

wherein the load controller, upon receiving said notification, changing the amount of power supplied to the load, if the load is currently in operation, to reduce a power draw of the load, or provide an alternate cycle of operation of the load, if the load is in operation, by which the load consumes less power than during a cycle of operation in which no power savings mode or DRLC event has been instated, or delaying a start in the load'"'"'s operation, if the load is not already in operation, or if the load is already in operation, changing a set point which would otherwise allow the load to draw more power, and including performing all of these actions thereby reducing the power draw by the load wherein the reduced power draw of the load is nonzero if the load is in operation, and the load controller further calculating energy savings of the load based, at least in part, on the determined power consumption of the load during the period of the power savings mode or DRLC event and energy usage statistics of the power consumption of the load when no power savings mode or DRLC event had occurred during a period of similar weather forecast conditions for corresponding time intervals, and transmitting by the load controller the calculated energy savings over the communications link to the power utility.

10. The apparatus of claim 9, wherein the load controller changing the amount of power supplied to the load comprises reducing the power draw of the load to nonzero if the load is already in operation at the time of the power saving mode or occurrence of the DRLC event.

11. The apparatus of claim 9, wherein the energy usage statistics are based partly on the determined power consumption of the load prior to receiving the first notification.

12. The apparatus of claim 9, further comprising a negative time of use register that is updated based upon the determined energy savings.

13. The apparatus of claim 12, wherein the communicative link transmitting information on the negative time of use register.

14. A power distribution system comprising:

a power source operable to provide power to a load through a power distribution system;

a demand response load control (DRLC) determination controller operatively connected to both the load and the power distribution system;

a load controller operating at a location of the load and controlling the amount of power provided from the power source;

at least one detector determining power consumption of the load;

a communications link extending between a DRLC determination controller and the load controller, the load controller receiving a first notification from the DRLC determination controller via the communication link indicating that a power savings mode or a DRLC event is instated and receiving a second DRLC notification from the DRLC determination controller via the communication link indicating that the power savings mode or the DRLC event no longer exists,

wherein the power savings mode or the DRLC event is associated with an event period, the first notification being generated by the DRLC determination controller based, at least in part, on a determination that current power usage by a plurality of loads is above a predetermined value, and a predictive analysis of anticipated power consumption by loads connected to the power distribution system, and wherein the predictive analysis is based, at least partially, on current weather forecast data obtained at time intervals during a day and historical statistical power consumption data associated with the load for past weather conditions and related to the current weather forecast data for corresponding time intervals;

the load controller determining, if a load is in operation, that the load is running according to a predetermined mode of operation and controlling power supplied to the load; and

an electronic memory storing energy usage statistics,

wherein, in response to receiving the first notification, the load controller, if the load is in operation, reduces the amount of power supplied to the load by providing an alternate cycle of operation in which the load consumes less power than during a cycle of operation in which no load control event is in effect, or delays a start in the load'"'"'s operation if the load is not already in operation, or if the load is already in operation or is started into operation by the load controller changes a set point by which the load would otherwise be allowed to draw more power, the reduced power draw on the load being nonzero, and including all of these actions, and the load controller further calculating a resultant energy savings of the load based, at least in part, on the determined power consumption of the load during the period of the power savings mode or the DRLC event and energy usage statistics of the power consumption of the load when no power savings mode or DRLC event has occurred during a period of similar weather forecast conditions for corresponding time intervals, the load controller transmitting the calculated energy savings over the communications link to the power utility.

15. The power distribution system of claim 14, wherein the load controller changing the amount of power supplied to the load comprises reducing the power draw of the load to nonzero if the load is already in operation at the time of the power saving mode or occurrence of the DRLC event.

16. The power distribution system of claim 14, wherein energy usage statistics are based, at least in part, on the determined power consumption of the load prior to receiving the first notification.

17. The power distribution system of claim 14, further comprising a negative time of use register that is updated based upon the determined energy savings.

18. The power distribution system of claim 14 wherein the DRLC determination controller transmitting a user notification message to the end user associated end user location that the power savings mode or the DRLC event has been determined by the power utility.