System and method for using climate controlled spaces as energy storage units for “receiving” surplus energy and for “supplying”energy when needed

• US 9,600,009 B1
• Filed: 10/06/2013
• Issued: 03/21/2017
• Est. Priority Date: 05/28/2010
• Status: Active Grant

• Current Assignee: Itron, Inc.
• Original Assignee: Comverge Incorporated (Itron, Inc.)
• Inventors: Rossi, John, Miyaji, Wendell
• Primary Examiner(s): Karim, Ziaul
• Application Number:
  US14/046,998
• Time in Patent Office: 1,262 Days
• Field of Search: 700/277, 700/276
• US Class Current: 1/1
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: G05F 1/66 Regulating electric power

Abstract

A method and system for managing an energy supply of a utility provider include calibrating one or more climate controlled spaces for a controller. The calibrating may include calculating a heating/cooling ratio for the one or more climate controlled spaces. After this calibration occurs, the system may determine if an energy supply surplus exists. If an energy supply surplus exists, then the system may start using the one or more climate controlled spaces as energy sinks for expending energy according to the heating/cooling ratio. The system may also determine if an energy supply deficit exists and if an energy supply deficit exists, then the system may start using the one or more climate controlled spaces as energy “sources,” in which a direct load control algorithm is used to reduce energy consumption by the one or more climate controlled spaces.

Claims

1. A machine-implemented method for managing an energy supply of a utility provider, comprising:

calibrating one or more climate controlled spaces for a controller by calculating a heating or cooling ratio for the one or more climate controlled spaces;

determining if an energy supply deficit exists with the controller; and

if the energy supply deficit exists, then the controller starts using the one or more climate controlled spaces as energy sources for the energy supply in which a direct load control algorithm is used by the controller to reduce consumption of energy, wherein a heating or cooling (H or C) ratio is governed by the following equation;

H or C ratio=(t0+t1)/t2

wherein t0 is a time period between when a set point temperature is reached and when a thermostat issues a request to a space conditioning load, t1 is a time period between when the thermostat issues a request to the space conditioning load and when the space conditioning load is allowed to be activated, and t2 is a time period between when the space conditioning load is allowed to be activated and when the space conditioning load is stopped once it reaches a set point temperature of the thermostat.

2. The method of claim 1, further comprising:

determining if an energy supply surplus exists with a controller.

3. The method of claim 2, further comprising:

if the energy supply surplus exists, then the controller starts using the one or more climate controlled spaces as energy sinks for using up energy according to the heating or cooling ratio.

4. The method of claim 3, wherein the one or more climate controlled spaces comprises at least one of a room, a plurality of rooms, a single building, and a plurality of buildings.

5. The method of claim 4, further comprising holding the space conditioning load in an off-state for a predetermined period of time in order to calculate the heating or cooling ratio of the one or more climate controlled spaces.

6. The method of claim 5, wherein the space conditioning load comprises at least one of an air conditioner, a compressor, a heat pump, a fan, and a furnace.

7. The method of claim 6, further comprising sampling a population of the one or more climate controlled spaces with the controller to determine an average heating or cooling ratio and using that average heating or cooling ratio for the population.

8. The method of claim 7, further comprising the controller determining the heating or cooling ratio using at least one of the thermostat and a switch.

9. The method of claim 8, further comprising storing the heating or cooling ratio locally at customer premise equipment.

10. The method of claim 4, further comprising receiving the heating or cooling ratio from across a communications network and modifying the heating or cooling ratio with the central controller.

11. A system for managing an energy supply for a utility provider comprising:

a central controller comprising a central load control module, the central load control module operable for;

determining if an energy supply surplus exists;

using one or more climate controlled spaces as energy sinks for burning up energy according to a heating or cooling ratio if the energy supply surplus exists; and

a space conditioning load coupled to the one or more climate controlled spaces, wherein the heating or cooling (H or C) ratio is governed by the following equation;

H or C ratio=(t0+t1)/t2

wherein t0 is a time period between when a set point temperature is reached and when a thermostat issues a request to a space conditioning load, t1 is a time period between when the thermostat issues a request to the space conditioning load and when the space conditioning load is allowed to be activated, and t2 is a time period between when the space conditioning load is allowed to be activated and when the space conditioning load is stopped once it reaches a set point temperature of the thermostat.

12. The system of claim 11, wherein the central controller is operable for calibrating the one or more climate controlled spaces by calculating the heating or cooling ratio for the one or more climate controlled spaces.

13. The system of claim 12, further comprising:

a communications network coupled to the central controller; and

customer premise equipment coupled to the communications network and to the space conditioning load.