Intelligent metering demand response

• US 8,880,232 B2
• Filed: 05/16/2013
• Issued: 11/04/2014
• Est. Priority Date: 11/13/2009
• Status: Active Grant

• Current Assignee: Leviton Manufacturing Company Incorporated
• Original Assignee: Leviton Manufacturing Company Incorporated
• Inventors: Parsons, Kevin
• Primary Examiner(s): Ali, Mohammad
• Assistant Examiner(s): Rao, Sheela S
• Application Number:
  US13/895,795
• Publication Number:
  US 20130253721A1
• Time in Patent Office: 537 Days
• Field of Search: 700/295, 700/19, 700/291, 315/149
• US Class Current: 700/295
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• 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 13/00022 using wireless data transmission
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H05B 47/175 by remote control
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• 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 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/246 the system involving the remote operation of lamps or lighting equipment
• CPC Class Codes: Y04S 40/124 using wired telecommunication networks or data transmission busses
• CPC Class Codes: Y04S 40/126 using wireless data transmission

Abstract

A system and method for real-time power management are provided. The system can include one or more lights, one or more light controllers, one or more meters to detect power demand of a building, and a central controller to modify the light output of the lights responsive to the detected power demand. The system can interface with other utility controls to manage the total power demand of the building on a real-time basis. The light controllers can provide individual metering of the lights for use by the central controller.

Claims

1. A system for managing utility services in a building, the system comprising:

at least one building load;

at least one utility meter to measure an amount of power consumed within a building and to output demand data corresponding to the amount of power consumed within the building;

at least one sub-meter to measure an amount of power consumed by the at least one building load;

at least one building load controller to control power to the at least building load, wherein the at least one building load controller can control the at least one of building load; and

a central controller to receive the demand data from the at least one sub-meter or the at least one utility meter and to send a signal to the building load controller to adjust the at least one of building load in response to the demand data,

wherein the central controller is configured to maintain the amount of power consumed within the building below a power setpoint set by a user or utility company such that the amount of power consumed within the building does not exceed the power setpoint,

wherein the central controller is configured to receive a new power setpoint from the at least one sub-meter or the at least one utility meter and to adjust the amount of power consumed within the building such that the amount of power consumed within the building does not exceed the new power setpoint; and

wherein the building load controller modifies the at least one building load by turning the at least one building load on or off or by reducing power to the at least one building load.

2. The system of claim 1, wherein the central controller is able to receive demand data from the at least one utility meter and to send a signal to the building load controller to adjust the at least one building load responsive to the demand data.

3. The system of claim 1, wherein the demand data is an instantaneous value of the amount of power consumed within the building.

4. The system of claim 1, wherein the demand data comprises a trend line value of the amount of power consumed within the building.

5. The system of claim 1, wherein the at least one building load includes an interior lighting system, and wherein the central controller sends a signal to the building load controller to adjust the interior lighting system such that a set amount of light is maintained within an interior of the building.

6. The system of claim 5, wherein the set amount of light maintained within the interior of the building includes an amount of light provided by the interior lighting system and an amount of natural light, the building load controller decreases the amount of light provided by the interior lighting system in a specified space as the amount of natural light monitored in the specified space increases.

7. The system of claim 1, wherein the at least one building load is one of an HVAC system, a water supply system or an electrical lighting system.

8. The system of claim 1, wherein the utility meter is selected from one of a power meter, a gas meter, or a water meter.

9. The system of claim 1, wherein the sub-meter is selected from one of an electric sub-meter, a gas sub-meter or a water sub-meter.

10. The system of claim 1, wherein the central controller is selected from one of a local personal computer, a personal computer connected over a network, a dedicated controller, or a remote server.

11. The system of claim 1, wherein the central controller includes a display and an input device so that the user can interact with the central controller to manually adjust the power setpoint, view data, and manually control the at least one building load.

12. The system of claim 1, wherein the central controller can monitor and control the at least one building load on a real-time basis.

13. The system of claim 1, wherein the power setpoint includes a desired peak power usage for the building and a maximum peak power usage for the building, the user being able to manually input and modify, through the central controller, the power setpoint.

14. The system of claim 1, wherein the central controller can monitor the demand data and make adjustments to the at least one building load to ensure that the amount of power consumed within the building does not exceed the power setpoint.

15. The system of claim 14, wherein the central controller adjusts power to the at least one building load by making adjustments to the at least one building load such that the adjustments are not perceptible to occupants of the building.

16. The system of claim 1, wherein the central controller controls the amount of power consumed within the building by comparing a current value of the amount of power consumed within the building to the power setpoint at predetermined intervals.

17. The system of claim 1, wherein the central controller controls the amount of power consumed within the building by comparing a current value of the amount of power consumed within the building to the power setpoint on a continuous basis.

18. The system of claim 1, wherein the central controller controls the amount of power consumed within the building by logging the amount of power consumed within the building over time and then periodically comparing trends in the amount of power consumed within the building to the power setpoint to determine if steps are needed to reduce power demand.

19. The system of claim 1, further comprising one or more sensors for monitoring an environmental condition, the one or more sensors being communicatively coupled to the central controller for transmitting data to the central controller, the central controller being adapted to predict increases in the amount of power consumed within the building based on the data received from the one or more sensors, the central controller being further adapted to implement one or more corrective actions to prevent exceeding the power setpoint.

20. The system of claim 19, wherein the one or more corrective actions includes taking steps to reduce the amount of power being consumed by one or more other loads in the building to account for an impending load increase due to one or more loads.

21. The system of claim 19, wherein the one or more sensors is selected from the group consisting of an exterior temperature sensor, an exterior light sensor, an interior temperature sensor, an interior light sensor, and an occupancy sensor.

22. The system of claim 1, wherein the demand data is transmitted to the central controller in response to a query entered by the user at the central controller.

23. The system of claim 1, wherein the building load controller is an electrical switching module including a module controller electrically coupled to one or more the electrical switching devices.

24. The system of claim 23, wherein the one or more electrical switching devices is a plurality of relays and the module controller is configured to monitor the plurality of relays and is configured to actuate the plurality of relays.

25. The system of claim 23, wherein the electrical switching module further comprises a communication interface for communicating with the central controller.

26. A method for real-time power management, the method comprising:

monitoring an amount of power consumed by at least one building load via at least one sub-meter or at least one utility meter electrically coupled to the at least one building load;

reporting the amount of power consumed to a central controller;

making a determination by the central controller whether the amount of power consumed is approaching a setpoint;

selecting one or more corrective measures as needed based upon the determination;

implementing the selected corrective measure by sending a signal from the central controller to at least one building load controller electrically coupled to the at least one building load;

receiving a power demand response signal from a utility supplier;

establishing a new setpoint responsive to the power demand response signal; and

repeating the monitoring, reporting, making, selecting and implementing based upon the new setpoint.

27. The method of claim 26, wherein making a determination includes monitoring a rate of increase of the amount of power consumed and a proximity of the amount of power consumed to the setpoint.

28. The method of claim 26, wherein making a determination includes monitoring a time of day, readings from sensors, and a history of prior corrective measures.

29. The method of claim 26, wherein the implementing the selected corrective measure includes one of dimming lights throughout the building, dimming lights in specific spaces in the building, reducing delay times for light controls in the building, or reducing other non-lighting loads in the building.

30. The method of claim 26, wherein making a determination by the central controller whether the amount of power consumed is approaching the setpoint includes comparing an instantaneous value of the amount of power consumed with the setpoint.

31. The method of claim 26, wherein the making a determination by the central controller whether the amount of power consumed is approaching the setpoint includes comparing a plurality of measurements incorporating the amount of power consumed with the setpoint to account for trends in the amount of power consumed.

32. The method of claim 26, wherein the setpoint is one of an instantaneous setpoint or a set amount of total usage for a given time period.