Using customer premises to provide ancillary services for a power grid

• US 10,169,833 B2
• Filed: 05/14/2014
• Issued: 01/01/2019
• Est. Priority Date: 05/14/2013
• Status: Active Grant

• Current Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Original Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Inventors: Barooah, Prabir, Meyn, Sean
• Primary Examiner(s): Mitchell, Jason D
• Application Number:
  US14/120,367
• Publication Number:
  US 20140339316A1
• Time in Patent Office: 1,693 Days
• Field of Search: 700295-298
• CPC Class Codes: G06Q 50/06 Energy or water supply

Abstract

Techniques for providing ancillary services to a power grid using customer premises such as commercial buildings. The techniques may involve receiving a regulation signal from a grid operator that is specific to a commercial building and modifying power consumption by at least one power consumption component in the building based on the regulation signal. The power consumption component may be a fan of a Heating, Ventilation, and Air Conditioning (HVAC) system. Conducted experiments demonstrate that up to 15% of fan power capacity may be deployed for regulation purposes while maintaining indoor temperature deviation to no more than 0.2° C. The regulation signal may be tracked in a frequency band from about 4 seconds to 10 minutes.

Claims

1. A method of providing ancillary services to a power grid using a customer premises comprising at least one power consumption component, wherein power consumption of the at least one power consumption component can be changed continuously, the method comprising:

receiving a regulation signal, wherein the regulation signal is associated with an ancillary service for the power grid and indicates a desired change in power consumption at the customer premises from a baseline wherein the desired change in power consumption allocated to the customer premises is determined based on a total amount of power consumption to be adjusted in the power grid and a power adjustment capability of the customer premises; and

based on the regulation signal, modifying at least one operating parameter of the at least one power consumption component so that (1) the power consumption of the at least one power consumption component is changed in accordance with the regulation signal, wherein the at least one operating parameter and the power consumption of the at least one power consumption component are continuously variable, (2) the change of the power consumption of the at least one power consumption component causes a deviation of the power consumption of the at least one power consumption component from the baseline, and (3) the deviation from the baseline individually tracks the regulation signal.

2. The method of claim 1, wherein:

the method further comprises receiving information indicating the power consumption of the at least one power consumption component; and

modifying the at least one operating parameter comprises (1) computing the at least one operating parameter based on the filtered regulation signal and the information, and (2) using at least one feedforward loop to modify the at least one operating parameter.

3. The method of claim 1, wherein the regulation signal is specific to the customer premises.

4. The method of claim 1, wherein the ancillary service comprises frequency regulation of the power grid.

5. The method of claim 1, wherein the ancillary service comprises load following on the power grid.

6. The method of claim 1, wherein the regulation signal has primary frequency components indicative of changes in power consumption over a time in a range from 4 seconds to 10 minutes.

7. The method of claim 1, wherein the regulation signal has primary frequency components indicative of changes in power consumption over a time in a range from 4 seconds to 20 minutes.

8. The method of claim 1, wherein the at least one power consumption component comprises at least one component of a Heating, Ventilation, and Air Conditioning (HVAC) system in a commercial building at the customer premises.

9. The method of claim 1, wherein the at least one power consumption component comprises at least one fan.

10. The method of claim 9, wherein the at least one operating parameter comprises speed of the at least one fan.

11. The method of claim 9, wherein the at least one operating parameter comprises a plurality of operating parameters.

12. The method of claim 11, wherein the plurality of operating parameters comprises speed of the at least one fan and an air flow rate setpoint.

13. The method of claim 12, wherein modifying the air flow rate setpoint comprises modifying a static pressure setpoint.

14. The method of claim 13, wherein modifying the static pressure setpoint causes alteration of a baseline supply air flow rate.

15. The method of claim 1, wherein modifying the at least one operating parameter comprises:

estimating, in real time, the deviation of the power consumption of the at least one power consumption component from the baseline by passing measured power consumption of the at least one power consumption component through a high pass filter;

comparing the estimated deviation with the regulation signal using a feedback control loop to determine a control command in real time, wherein the control command can be at least a setpoint of fan speed, a setpoint of airflow rate, a setpoint of flow rate of chilled water or hot water, or a setpoint of static pressure;

using the control command to modify the at least one operating parameter of the at least one power consumption component.

16. The method of claim 1, wherein the at least one power consumption component comprises at least one chiller.

17. The method of claim 1, wherein:

the method further comprises receiving at least one user input indicating an operating state of the at least one power consumption component; and

modifying the at least one operating parameter comprises computing the at least one operating parameter based on the regulation signal and the user input.

18. The method of claim 1, wherein:

the customer premises is a commercial building; and

the power consumption of the at least one power consumption component is changed so that a temperature in the commercial building changes by no more than 1 degree Celsius relative to a user specified temperature.

19. The method of claim 1, wherein:

the customer premises is a commercial building; and

the power consumption of the at least one power consumption component is changed so that a temperature in the commercial building changes by no more than 0.2 degrees Celsius relative to a user specified temperature.

20. The method of claim 1, wherein:

the change to implement the ancillary service comprises a change to compensate for a mismatch between load in the power grid and power generation capacity in the power grid; and

the method further comprises;

modifying the at least one operating parameter so that the power consumption of the at least one power consumption component increases based on the change to compensate for the mismatch.

21. A method of providing ancillary services to a power grid using a customer premises comprising at least one power consumption component comprising at least one operating parameter that is continuously variable, the method comprising:

receiving a regulation signal, wherein the regulation signal indicates a desired change in power consumption at the customer premises from a baseline, wherein the desired change in power consumption allocated to the customer premises is determined based on a total amount of power consumption to be adjusted in the power grid and a power adjustment capability of the customer premises; and

based on the regulation signal, modifying the at least one continuously variable operating parameter of the at least one power consumption component so that (1) the power consumption of the at least one power consumption component is changed in accordance with the received regulation signal, (2) the change of the power consumption of the at least one power consumption component causes a deviation of the power consumption of the at least one power consumption component from the baseline, and (3) the deviation from the baseline individually tracks the regulation signal.

22. The method of claim 21, wherein:

the method further comprises receiving information indicating the power consumption of the at least one power consumption component; and

modifying the at least one operating parameter comprises (1) computing the at least one operating parameter based on the filtered regulation signal and the information, and (2) using at least one feedback loop to modify the at least one operating parameter.

23. The method of claim 21, wherein:

the method further comprises establishing a first operating point of the at least one power consumption component, the first operating point being selected to be a fraction of a rated power for the at least one power consumption component; and

modifying the at least one operating parameter comprises increasing power consumption of the at least one power consumption component in accordance with the received regulation signal so as to provide an ancillary service to the power grid.

24. The method of claim 21, wherein the at least one power consumption component comprises at least one component of a Heating, Ventilation, and Air Conditioning (HVAC) system in the commercial building.

25. The method of claim 21, wherein the at least one power consumption component comprises at least one fan.

26. The method of claim 25, wherein the at least one operating parameter comprises speed of the at least one fan.

27. The method of claim 25, wherein the at least one operating parameter comprises an air flow rate setpoint.

28. The method of claim 21, wherein modifying the at least one continuously variable operating parameter comprises:

estimating, in real time, the deviation of the power consumption of the at least one power consumption component from the baseline by passing measured power consumption of the at least one power consumption component through a high pass filter;

comparing the estimated deviation with the regulation signal using a feedback control loop to determine a control command in real time, wherein the control command can be at least a setpoint of fan speed, a setpoint of airflow rate, a setpoint of flow rate of chilled water or hot water, or a setpoint of static pressure;

using the control command to modify the at least one continuously variable operating parameter of the at least one power consumption component.

29. The method of claim 21, wherein the at least one power consumption component comprises at least one chiller.

30. The method of claim 21, wherein:

the method further comprises receiving at least one user input indicating an operating state of the at least one power consumption component; and

modifying the at least one operating parameter comprises computing the at least one operating parameter based on the regulation input and the user input.

31. The method of claim 21, wherein:

the change to implement the ancillary service comprises a change to compensate for a mismatch between load in the power grid and power generation capacity in the power grid; and

the method further comprises;

modifying the at least one operating parameter so that the power consumption of the at least one power consumption component increases based on the change to compensate for the mismatch.

32. The method of claim 21, wherein:

the customer premises is a commercial building; and

the power consumption of the at least one power consumption component is changed so that a temperature in the commercial building changes by no more than 1 degree Celsius relative to a user specified temperature.

33. The method of claim 21, wherein:

the customer premises is a commercial building; and

the power consumption of the at least one power consumption component is changed so that a temperature in the commercial building changes by no more than 0.2 degree Celsius relative to a user specified temperature.

34. A method for operating a power grid, the method comprising:

determining an amount of load to be adjusted in the power grid;

allocating to each of a plurality of facilities an adjustment in continuously variable power consumption to achieve a load adjustment based on the determined amount and a power adjustment capability of the facility; and

transmitting a plurality of regulation signals to the plurality of facilities, wherein each regulation signal transmitted to a facility indicates the adjustment in continuously variable power consumption allocated to the facility such that different regulation signals are transmitted to different ones of the plurality of facilities and such that each of the different ones of the plurality of facilities individually tracks the respective different regulation signals using at least one control loop.

35. The method of claim 34, wherein:

the adjustment in power consumption allocated to each facility is based on the determined amount of load to be adjusted and a capability of the facility specific to the facility.

36. The method of claim 35, wherein:

the capability of the facility comprises a capability to modify at least one operating parameter of the at least one power consumption component in the facility so that the power consumption of the at least one power consumption component is changed in accordance with the regulation signal.

37. The method of claim 36, wherein:

the allocating comprises measuring in real time an imbalance between power generated on the power grid and load on the power grid and updating the allocating in real time so as to compensate for the imbalance.

38. The method of claim 34, wherein:

the facility comprises at least one commercial building.

39. An apparatus for controlling at least one power consumption component to provide ancillary services to a power grid, the apparatus comprising:

circuitry configured to;

receive a regulation signal associated with the ancillary service for the power grid, wherein the regulation signal indicates a desired change in power consumption at a customer premises comprising the at least one power consumption component from a baseline, wherein the desired change in power consumption allocated to the customer premises is determined based on a total amount of power consumption to be adjusted in the power grid and a power adjustment capability of the customer premises;

receive input indicating at least one continuously variable operating parameter of the at least one power consumption component; and

generate a control signal for the at least one power consumption component such that the at least one continuously variable operating parameter of the at least one power consumption component is changed, in accordance with the input and the regulation signal so that (1) the power consumption of the at least one power consumption component is changed, (2) the change of the power consumption of the at least one power consumption component causes a deviation of the power consumption of the at least one power consumption component from the baseline, and (3) the deviation from the baseline individually tracks the regulation signal to control power consumption of the at least one power consumption component in accordance with the ancillary service, wherein the control signal is a fan speed control signal.

40. The apparatus of claim 39, wherein:

the input is derived from a user input specifying an operation of the at least one power consumption component.

41. The apparatus of claim 39, wherein:

the apparatus comprises a thermostat adapted to control at least a portion of a Heating, Ventilation, and Air Conditioning (HVAC) system.

42. The apparatus of claim 39, wherein:

the apparatus comprises a controller for a component of a Heating, Ventilation, and Air Conditioning (HVAC) system.

43. The apparatus of claim 39, wherein:

the apparatus further comprises a housing;

the circuitry is within the housing; and

the housing has terminals for wires connected to a controller for a portion of a Heating, Ventilation, and Air Conditioning (HVAC) system.