Energy management system and method

• US 7,705,484 B2
• Filed: 04/10/2007
• Issued: 04/27/2010
• Est. Priority Date: 04/10/2007
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Horst, Gale R.
• Primary Examiner(s): Paladini; Albert W
• Assistant Examiner(s): AMAYA, CARLOS DAVID
• Application Number:
  US11/733,385
• Publication Number:
  US 20080252141A1
• Time in Patent Office: 1,113 Days
• Field of Search: 307 34- 35, 307 38- 39, 700/295
• US Class Current: 307/35
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 2310/64 The condition being economic, e.g. tariff based load management
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/30 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: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/242 Home appliances
• CPC Class Codes: Y04S 50/10 Energy trading, including energy flowing from end-user application to grid

Abstract

An energy management system comprises at least one energy consuming device and an energy controller. The energy controller supplies energy to the energy consuming device and transmits an energy curtailment signal in response to an energy over-consumption condition. In one embodiment, the curtailment signal can be directed to a predetermined class of energy consuming device. In another embodiment, the energy consuming device can determine whether to curtail energy consumption in response to the curtailment signal. The energy controller can be in the form of a power strip.

Claims

1. An energy management system comprising:

at least one energy consuming device; and

an energy controller supplying energy to the at least one energy consuming device and configured to transmit a class-specific energy curtailment signal for a predetermined class of energy consuming device in response to an energy over-consumption condition;

wherein the at least one energy consuming device comprises a device controller coupled to the energy controller to receive the class-specific energy curtailment signal, determine whether the at least one energy consuming device is within the predetermined class, and to curtail energy consumption when the at least one energy consuming device is within the predetermined class.

2. The energy management system of claim 1 wherein the predetermined class is one of a plurality of device classes that depend on a degree of user interaction with the energy consuming device during operation of the energy consuming device.

3. The energy management system of claim 2 wherein the device classes comprise a non-interactive class corresponding to energy consuming devices with which the user does not interact during operation of the energy consuming device.

4. The energy management system of claim 2 wherein the device classes comprise an interactive class corresponding to energy consuming devices with which the user interacts during operation of the energy consuming device.

5. The energy management system of claim 2 wherein the device classes comprise a semi-interactive class corresponding to energy consuming devices with which the interaction of the user with the energy consuming device depends on an operation state of the energy consuming device.

6. The energy management system of claim 1 wherein the predetermined class is one of a plurality of device classes that comprise a non-interruptible class corresponding to energy consuming devices that are configured to not act in response to the energy curtailment signal.

7. The energy management system of claim 1 wherein the predetermined class is one of a plurality of device classes each having a class priority, and the energy controller is further configured to transmit the class-specific energy curtailment signal according to the priority of the device classes whereby the class associated with the energy curtailment signal changes to a higher priority class if the energy controller re-transmits the energy curtailment signal due to continued presence of the energy over-consumption condition.

8. The energy management system of claim 1 wherein the curtailment of the energy consumption comprises at least one of reducing and eliminating energy consumption of the energy consuming device.

9. The energy management system of claim 1 wherein the energy controller is further configured to curtail energy supplied to the energy consuming device if the energy over-consumption condition exists following transmission of the class-specific energy curtailment signal.

10. The energy management system of claim 1, further comprising a plurality of the energy consuming devices, each belonging to at least one class of a plurality of device classes and comprising a device controller coupled to the energy controller to receive the class-specific curtailment signal, determine whether the energy consuming device is within the predetermined class, and to curtail energy consumption to the energy consuming device within the predetermined class.

11. The energy management system of claim 10 wherein the curtailment of the energy consumption comprises at least one of reducing and eliminating energy consumption of the energy consuming device.

12. The energy management system of claim 10 wherein the energy controller is further configured to transmit the class-specific energy curtailment signal according to a priority of the device classes whereby the class associated with the energy curtailment signal changes to a higher priority class if the energy controller re-transmits the energy curtailment signal due to continued presence of the energy over-consumption condition.

13. The energy management system of claim 12 wherein the energy controller is further configured to curtail energy supplied to the energy consuming device if the energy over-consumption condition exists following transmission of the class-specific energy curtailment signal for the highest priority device class.

14. The energy management system of claim 1, wherein the energy consuming device comprises a household appliance.

15. The energy management system of claim 1 wherein the energy controller is a power strip.

16. The energy management system of claim 1 wherein the predetermined class is one of a plurality of dynamic device classes that depend on an operating state of the energy consuming device.

17. The energy management system of claim 1 wherein the class-specific energy curtailment signal functions as an energy curtailment notification for a device class other than the predetermined class of energy consuming device.

18. The energy management system of claim 1, further comprising an external source coupled to the energy controller and transmitting an external energy curtailment signal to the energy controller in response to the energy over-consumption condition.

19. A power strip comprising:

an inlet electrical connector configured to be plugged into a wall socket to receive an input of electricity;

a plurality of outlet electrical connectors coupled to the inlet electrical connector for receiving the electricity and configured to receive an electrical plug of an energy consuming device for transmission of the electricity from the inlet electrical connector to the energy consuming device; and

a controller controlling the input of electricity from the inlet electrical connector to the outlet electrical connectors and configured to transmit, in response to an energy over-consumption condition, a class-specific energy curtailment signal for a predetermined class of energy consuming device to the outlet electrical connectors and thereby any energy consuming devices plugged into the outlet electrical connectors,

wherein upon receipt of the class-specific energy curtailment signal by a device controller of an energy consuming device plugged into one of the outlet electrical connecters, the device controller determines whether the energy consuming device is within the predetermined class and curtails energy consumption when the energy consuming device is within the predetermined class.

20. The power strip of claim 19 wherein the predetermined class is one of a plurality of device classes that depend on a degree of user interaction with the energy consuming device during operation of the energy consuming device.

21. The power strip of claim 20 wherein the device classes comprise at least one of the following classes:

a non-interactive class corresponding to energy consuming devices with which the user does not interact during operation of the energy consuming device, an interactive class corresponding to energy consuming devices with which the user interacts during operation of the energy consuming device, and a semi-interactive class corresponding to energy consuming devices with which the interaction of the user with the energy consuming device depends on an operation state of the energy consuming device.

22. The power strip of claim 19 wherein the predetermined class is one of a plurality of device classes comprising a non-interruptible class corresponding to energy consuming devices that are configured to not act in response to the energy curtailment signal.

23. The power strip of claim 19 wherein the predetermined class is one of a plurality of device classes, each having a class priority, and the controller is further configured to transmit the class-specific energy curtailment signal according to the priority of the device classes whereby the class associated with the energy curtailment signal changes to a higher priority class if the controller re-transmits the energy curtailment signal due to continued presence of the energy over-consumption condition.

24. The power strip of claim 23 wherein the controller is further configured to curtail energy supplied to the outlet electrical connectors if the energy over-consumption condition exists following transmission of the class-specific energy curtailment signal for the highest priority device class.

25. The power strip of claim 19 in combination with a smart energy consuming device belonging to at least one class of a plurality of device classes, the smart energy consuming device plugged into one of the outlet electrical connectors and configured to determine if the class-specific energy curtailment signal is directed to the device class of the smart energy consuming device and, if the class-specific curtailment signal is directed to the class of the energy consuming device, to curtail energy consumption in response to the class-specific energy curtailment signal.

26. The combination of claim 25 wherein the smart energy consuming device comprises a household appliance.

27. An energy management system, comprising:

a plurality of energy consuming devices;

an energy controller supplying energy to the plurality of energy consuming devices and configured to transmit a class-specific energy curtailment signal for a predetermined class of energy consuming device in response to an over-consumption condition;

a device controller provided in at least some of the plurality of energy consuming devices and coupled to the energy controller to receive the class-specific energy curtailment signal, determine whether the energy consuming device is within the predetermined class, and to curtail energy consumption when the at least one energy consuming device is within the predetermined class;

wherein the energy controller is further configured to curtail the energy supplied to at least one of the plurality of energy consuming devices not in the predetermined class if the energy over-consumption condition exists following transmission of the energy curtailment signal.

28. The energy management system of claim 27 wherein the curtailment of the energy consumption comprises at least one of reducing and eliminating energy consumption of the energy consuming device.

29. The energy management system of claim 27 wherein the energy consuming device is a household appliance.

30. The energy management system of claim 27 wherein the energy controller is a power strip.

31. The energy management system of claim 27 wherein the curtailment of the energy supplied to the energy consuming device comprises at least one of reducing and eliminating energy supplied to the energy consuming device.

32. The energy management system of claim 27, wherein the at least one of the plurality of energy consuming devices not in the predetermined class is in a second predetermined class.