POWER NODE FOR ENERGY MANAGEMENT

• US 20110095608A1
• Filed: 05/10/2010
• Published: 04/28/2011
• Est. Priority Date: 10/25/2009
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Greenwave Reality, Pte Ltd. (Greenwave Reality, Inc.)
• Inventors: Lyons, Timothy, Diehl, William, Windstrup, Sonny, Manniche, Martin, Jonsson, Karl S.
• Granted Patent: US 8,138,626 B2
• Time in Patent Office: Days
• US Class Current: 307/39
• CPC Class Codes: G01D 2204/14 Displaying of utility usage with respect to time, e.g. for monitoring evolution of usage or with respect to weather conditions
• CPC Class Codes: G01D 2204/24 Identification of individual loads, e.g. by analysing current/voltage waveforms
• CPC Class Codes: G01D 4/002 Remote reading of utility meters
• CPC Class Codes: G01R 21/133 by using digital technique
• CPC Class Codes: G06F 1/3209 Monitoring remote activity, e.g. over telephone lines or network connections
• CPC Class Codes: H01R 13/6683 with built-in sensor
• CPC Class Codes: H01R 13/703 operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling partH01R13/71 takes precedence
• CPC Class Codes: H01R 25/003 the coupling part being secured only to wires or cables
• 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 13/0005 the elements or equipment being or involving power plugs or sockets
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 2310/16 The load or loads being an Information and Communication Technology [ICT] facility
• CPC Class Codes: H02J 2310/66 one of the loads acting as master and the other or others acting as slaves
• CPC Class Codes: H02J 2310/70 Load identification
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H04L 12/2825 Reporting to a device located outside the home and the home network access arrangements H04L12/2856; for remote control or remote monitoring of applications H04L67/025; telephonic communication systems adapted for combination with telemetering systems H04M11/002
• 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 20/00 : Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
• CPC Class Codes: Y04S 20/20 : End-user application control systems
• 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 20/30 : Smart metering, e.g. specially adapted for remote reading
• CPC Class Codes: Y04S 40/124 : using wired telecommunication networks or data transmission busses

Abstract

A power node provides energy management features in a networked data communications and control environment.

Claims

1. A power node for energy management comprising:

one or more sockets, each socket operable to receive a plug for supplying power to a respective load;

a power supply bus having one or more bus taps, each socket coupled to a respective power supply bus tap via an automated switch;

a voltage sensor coupled to the power supply bus;

one or more current sensors, each current sensor operable to sense the current supplied to a respective socket;

a selector device operable by a power node user to select an environmental variable from a plurality of selectable environmental variables;

a signal electronics section in signal communication with the selector device, the voltage sensor, and said one or more current sensors;

the signal electronics section operable to

monitor the current supplied to each said respective load,

monitor the voltage of the power supply bus,

monitor the power supplied to each said respective load,

disconnect and reconnect each said respective load, and

communicate with a controller via a network;

an enclosure and a power cord extending from the enclosure;

the power cord having first and second ends, the first end terminated with a plug and the second end coupled to the power supply bus; and

,

the enclosure housing the sockets, the power supply bus, the signal electronics section, the voltage sensor, and said one or more current sensors.

2. The power node of claim 1 further comprising:

the enclosure having an air inlet and an air outlet with a natural draft flow path there between;

a temperature sensor located near the air inlet; and

,

the temperature sensor in signal communication with the signal electronics section; and

,

the signal electronics section operable to monitor the air temperature in the vicinity of the power node.

3. The power node of claim 1 further comprising:

each socket having an associated insertion switch;

an electrical state of the insertion switch operable to indicate whether a plug is inserted in the socket;

each insertion switch located within the enclosure and in signal communication with the signal electronics section; and

,

the signal electronics section operable to monitor the state of each insertion switch.

4. An energy management system comprising:

one or more of the power nodes of claim 1;

each power node signal electronics section having a communications block;

a mesh network for transporting signals between the communications blocks and a gateway device;

a user device in signal communication with the mesh network via the gateway device; and

,

the user device operable to

control the power supplied to individual loads,

limit the power consumed by individual loads to preselected values,

aggregate and report on energy consumption,

disconnect and reconnect individual loads according to a time schedule, and

characterize the nature of a particular load based on the selected environmental variable and one or more power bus voltage measurements of the corresponding power node and based on one or more current measurements of the corresponding socket.

5. The energy management system of claim 4 wherein the user device characterizes the nature of one or more loads.

6. The energy management system of claim 5 further comprising:

each socket having an associated insertion switch;

an electrical state of the insertion switch operable to indicate whether a plug is inserted in the outlet;

each insertion switch located within the enclosure and in signal communication with the signal electronics section; and

,

the signal electronics section operable to monitor the state of each insertion switch.

7. The energy management system of claim 6 wherein the user device utilizes data from the insertion switches to determine which, if any, of the loads should be recharacterized.

8. The energy management system of claim 4 further comprising:

a change detection system;

a change detection system filter having one or more filter parameters; and

,

wherein the power node transmits a network message when a filter parameter differs from a corresponding value derived from one or more power node measurements by a predetermined amount.

9. A method of managing energy consumption comprising the steps of:

interposing a plurality of power nodes for energy management in a plurality of power circuits supplying a plurality of appliances with electric power;

measuring the energy consumption of each electric appliance;

displaying to an energy user opportunities for reducing energy consumption, said opportunities being identified by the measurements of energy consumption; and

,

managing energy consumption by providing the energy user with an automated means to remotely control the energy consumption of each electric appliance.

10. The method of claim 9 further comprising the steps of:

identifying the standby power consumption of each appliance; and

,

providing a means for the energy user to automatically interrupt the power flow to any appliance remaining in a standby mode for a time greater than a predetermined period of time.

11. A power node for energy management comprising:

an input power coupler;

a first power switch having a first control port, a first power terminal and a second power terminal, the first power terminal electrically connected to the input power coupler, the first control port configured to control an electrical connection between the first power terminal and the second power terminal;

a first socket electrically connected to the second terminal of the first power switch;

a voltage sensor operable to measure voltage at the first socket;

a first current sensor operable to measure current flowing through the first socket;

a selector device configured to provide an environmental variable from a plurality of selectable environmental variables;

a signal electronics section including a communications block configured to communicate over a network, the signal communications block in signal communication with the selector device, the first control port of the first power switch, the voltage sensor and the first current sensor;

the signal electronics section configured to

monitor said current flowing through the first socket,

monitor said voltage at the first socket,

control said electrical connection between the first power terminal and the second power terminal of the first power switch, and

communicate across a network via the communications block;

a housing physically coupling the first socket, the first power switch, the signal electronics section, the first current sensor and the voltage sensor.

12. The power node of claim 11, the input power coupler comprising:

a power cord extending from the housing;

the power cord having a first end and a second end, the first end terminated with a power plug and the second end electrically connected to the first power terminal of the first switch, the power cord operable to conduct electricity from the power plug to the first power terminal of the first switch.

13. The power node of claim 11, the input power coupler comprising:

a power plug extending from the housing, wherein the power plug is electrically coupled to the first power terminal of the first switch and operable to conduct electricity from the power plug to the first power terminal of the first switch.

14. The power node of claim 11 further comprising:

a temperature sensor physically coupled to the housing and in signal communication with the signal electronics section;

wherein

the signal electronics section is further configured to monitor an air temperature near the power node.

15. The power node of claim 11 further comprising:

a first insertion switch having an electrical state indicating whether a device plug is inserted in the first socket, the first insertion switch physically coupled to the housing and in signal communication with the signal electronics section;

wherein

the signal electronics section is further configured to monitor the electrical state of the first insertion switch.

16. The power node of claim 11 wherein the signal electronics section is further configured to:

compare said current supplied to the first socket to a predetermined safe maximum; and

control the first power switch to electrically disconnect the first power terminal from the second power terminal of the first power switch if said current supplied to the first socket exceeds the predetermined safe maximum.

17. The power node of claim 11 wherein the signal electronics section is further configured to send a message across the network, said message containing information based on a measured value of said current supplied to the first socket.

18. The power node of claim 11 wherein the signal electronics section is further configured to:

receive a command from across the network;

control said electrical connection between the first power terminal and the second power terminal of the first power switch based on the command from across the network.

19. The power node of claim 11 further comprising:

a second power switch having a second control port, a third power terminal and a fourth power terminal, the third power terminal electrically connected to the input power coupler, the second control port in signal communication with the signal electronics section and operable to control an electrical connection between the third power terminal and the fourth power terminal;

a second socket electrically connected to the fourth terminal of the second power switch;

a second current sensor in signal communication with the signal electronics section and operable to measure current flowing through the second socket;

the signal electronics section further operable to

monitor said current flowing through the second socket, and

control said electrical connection between the third power terminal and the fourth power terminal of the second power switch;

the housing further physically coupling the second socket, second first power switch, and the second current sensor.

20. An energy management system comprising:

one or more of the power nodes of claim 11, including a particular power node;

a user device in signal communication with the network, wherein the user device is operable to characterize a load plugged into the first socket of the particular power node based on one or more electrical measurements related to the first socket of the particular power node.

21. The energy management system of claim 20 wherein the characterization of said load is also based on said environmental variable of the particular power node.

22. The energy management system of claim 20 wherein the user device is further operable to control the first power switch of the particular power node.

23. The energy management system of claim 20 wherein the user device is further operable to report energy consumed by one or more appliances plugged into the one or more power nodes.

24. The energy management system of claim 23 wherein the user device is further operable to report a cost related to the energy consumed by the one or more appliances plugged into the one or more power nodes.

25. The energy management system of claim 20 further comprising:

a change detection system; and

a change detection system filter having one or more filter parameters;

wherein the power node transmits a network message when a filter parameter of the one or more filter parameters differs from a corresponding value derived from said one or more electrical measurements related to the first socket of the particular power node by a predetermined amount.

26. An energy management system comprising:

one or more of the power nodes of claim 15, including a particular power node;

a user device in signal communication with the network, wherein the user device is operable to characterize a load plugged into the first socket of the particular power node based on one or more electrical measurements related to the first socket in response to a change in the electrical state of the first insertion switch.

27. A method of managing energy consumption comprising:

interposing one or more power nodes of claim 11 in one or more power circuits supplying one or more appliances with electric power;

measuring energy consumption of at least one electric appliance of the one or more appliances;

displaying opportunities for reducing energy consumption, said opportunities being identified based on measurements of said energy consumption; and

,

managing energy consumption by providing automated means to remotely control said energy consumption.

28. The method of claim 27 further comprising:

identifying a standby power consumption of an appliance of the plurality of appliances; and

,

disconnecting said appliance from said electric power if said appliance remains in a standby mode for a time greater than a predetermined period of time.