Apparatus and method for demand coordination network

• US 8,457,803 B2
• Filed: 02/10/2011
• Issued: 06/04/2013
• Est. Priority Date: 02/10/2010
• Status: Active Grant

• Current Assignee: Enel X North America, Inc. (ENEL SPA)
• Original Assignee: Enernoc
• Inventors: Willig, Randy C., Mathews, Jeffrey P., O'Kelley, Matthew B., Reh, Jeffrey G.
• Primary Examiner(s): ROBERTSON, DAVID
• Application Number:
  US13/025,142
• Publication Number:
  US 20110196513A1
• Time in Patent Office: 845 Days
• Field of Search: 700276-278, 700/286, 700/291, 700/295, 705/7.12, 705/7.22, 702/62, 340/870.02, 307/31, 307/38, 307/39, 219/490, 165/238, 622/64
• US Class Current: 700/291
• CPC Class Codes: G05B 13/02 electric
• CPC Class Codes: H02J 13/00004 characterised by the power network being locally controlled
• CPC Class Codes: H02J 13/00016 using a wired telecommunication network or a data transmission bus
• CPC Class Codes: H02J 13/00026 involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
• CPC Class Codes: H02J 2310/12 The local stationary network supplying a household or a building
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• 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 20/00 Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

An apparatus for controlling peak demand of a resource. The apparatus includes a plurality of devices and a plurality of control nodes. Each of the plurality of devices consumes a portion of the resource when turned on, and the each are capable of performing a corresponding function within an acceptable operational margin by cycling on and off. Each of the plurality of control nodes is coupled to a corresponding one of the plurality of devices, where the plurality of control nodes is coupled together via a demand coordination network, and where the plurality of control nodes coordinates run times for the each of the plurality of devices to reduce the peak demand of the resource, and where one or more of the run times start prior to when otherwise required to maintain corresponding local environments, but which still operate within the acceptable operating margin for the corresponding local environments.

Claims

1. An apparatus for controlling peak demand of an energy resource, the apparatus comprising:

a plurality of energy consuming devices, each consuming a portion of the energy resource when turned on, and said each capable of performing a corresponding function to maintain a corresponding local environment within an acceptable operational margin by cycling on and off; and

a plurality of control nodes, each coupled to a corresponding one of said plurality of energy consuming devices, wherein said plurality of control nodes is coupled together via a demand coordination network, and wherein said plurality of control nodes coordinates run times for said each of said plurality of energy consuming devices to reduce the peak demand of the energy resource, and wherein coordination of said run times includes advancing a first one or more of a plurality of start times, deferring a second one or more of said plurality of start times, and increasing one or more of a plurality of duty cycles of said energy consuming devices, and wherein the coordination is based on a replica copy of a global run time schedule and one or more sets of descriptors each characterizing an associated one or more corresponding local environments, and wherein the coordination of said run times allows for operation of one or more of said plurality of energy consuming devices within said acceptable operating margin for said corresponding local environments.

2. The apparatus as recited in claim 1, wherein said each of said plurality of control nodes maintains said replica copy of said global run time schedule for all of said plurality of energy consuming devices.

3. The apparatus as recited in claim 1, wherein said each of said plurality of control nodes develops an associated set of descriptors characterizing an associated one of said corresponding local environments.

4. The apparatus as recited in claim 3, wherein one of said plurality of control nodes employs additional sensor data to adjust said associated set of descriptors.

5. The apparatus as recited in claim 1, wherein said each of said plurality of control nodes develops and maintains a replica copy of said global run time schedule that specifies start time, duration, and duty cycle for said each of said plurality of energy consuming devices.

6. The apparatus as recited in claim 5, further comprising:

a monitor node, coupled to one or more non-system energy consuming devices and to said demand coordination network, configured to broadcast when said one or more non-system energy consuming devices is consuming the energy resource, wherein said each of said plurality of control nodes accounts for consumption of the energy resource by said one or more non-system energy consuming devices when maintaining said global run time schedule.

7. The apparatus as recited in claim 1, wherein said demand coordination network comprises an IEEE 802.15.4 wireless network.

8. A peak demand control system, for managing peak energy demand, the peak demand control system comprising:

a plurality of control nodes, each coupled to a corresponding one of a plurality of energy consuming devices, each energy consuming device capable of performing a corresponding function to maintain a corresponding local environment within an acceptable operating margin, wherein said plurality of control nodes are coupled together via a demand coordination network, and wherein said plurality of control nodes coordinates run times for said each of said plurality of energy consuming devices to reduce the peak energy demand, and wherein coordination of said run times includes advancing a first one or more of a plurality of start times, deferring a second one or more of said plurality of start times, and increasing one or more of a plurality of duty cycles of said plurality of energy consuming devices, and wherein the coordination is based on a replica copy of a global run time schedule and one or more sets of descriptors each characterizing an associated one or more corresponding local environments, and wherein the coordination of run times allows for operation of a corresponding one or more of said plurality of energy consuming devices within an acceptable operating margin for said associated one or more corresponding local environments; and

one or more sensor nodes, coupled to said demand coordination network, configured to provide one or more global sensor data sets to said plurality of control nodes, wherein said plurality of control nodes employs said one or more global sensor data sets in determining said run times.

9. The peak demand control system as recited in claim 8, wherein said each of said plurality of control nodes maintains said replica copy of said global run time schedule for all of said plurality of energy consuming devices.

10. The peak demand control system as recited in claim 8, wherein said each of said plurality of control nodes develops an associated set of descriptors characterizing an associated one of said corresponding local environments.

11. The peak demand control system as recited in claim 10, wherein one of said plurality of control nodes employs said one or more global sensor data sets to adjust said associated set of descriptors.

12. The peak demand control system as recited in claim 8, wherein said each of said plurality control nodes develops and maintains said replica copy of said global run time schedule that specifies start time, duration, and duty cycle for said each of said plurality of energy consuming devices.

13. The peak demand control system as recited in claim 12, further comprising:

a monitor node, coupled to one or more non-system energy consuming devices and to said demand coordination network, configured to broadcast when said one or more non-system energy consuming devices is consuming energy, wherein said each of said plurality of control nodes accounts for consumption of said energy by said one or more non-system energy consuming devices when generating said global run time schedule.

14. The peak demand control system as recited in claim 8, wherein said demand coordination network comprises an IEEE 802.15.4 wireless network.

15. A method for controlling peak demand of an energy, the method comprising:

controlling a plurality of energy consuming devices via corresponding control nodes, wherein each of the plurality of energy consuming devices consumes a portion of the energy resource when turned on, and wherein the each of the plurality of energy consuming devices is capable of performing a corresponding function to maintain a corresponding local environment within an acceptable operational margin by cycling on and off; and

coupling the corresponding control nodes together via a demand coordination network, and employing the demand coordination network to coordinate run times for the each of the plurality of energy consuming devices to reduce the peak demand of the energy resource, wherein coordination of the run times includes advancing a first one or more of a plurality of start times, deferring a second one or more of the plurality of start times, and increasing one or more of a plurality of duty cycles of the energy consuming devices, and wherein the coordination is based on a replica copy of a global run time schedule and one or more sets of descriptors each characterizing an associated one or more corresponding local environments, and wherein the coordination of run times allows for operation of a corresponding one or more of the plurality of energy consuming devices within the acceptable operating margin for the associated one or more corresponding local environments.

16. The method as recited in claim 15, wherein each of the corresponding control nodes maintains the replica copy of the global run time schedule for all of the plurality of energy consuming devices.

17. The method as recited in claim 15, wherein the each of the corresponding control nodes develops an associated set of descriptors characterizing an associated one of the corresponding local environments.

18. The method as recited in claim 17, wherein one of the corresponding control nodes employs additional sensor data to adjust the associated set of descriptors.

19. The method as recited in claim 15, wherein each of the corresponding control nodes develops and maintains the replica copy of the global run time schedule that specifies start time, duration, and duty cycle for the each of the plurality of energy consuming devices.

20. The apparatus as recited in claim 19, further comprising:

coupling one or more non-system energy consuming devices to the demand coordination network, and broadcasting when the one or more non-system energy consuming devices is consuming the energy resource, wherein each of the corresponding control nodes accounts for consumption of the energy resource by the one or more non-system energy consuming devices when generating the global run time schedule.