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US20120095610A1 - Smart nema outlets and associated networks - Google Patents

Smart nema outlets and associated networks Download PDF

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Publication number
US20120095610A1
US20120095610A1 US12/531,226 US53122608A US2012095610A1 US 20120095610 A1 US20120095610 A1 US 20120095610A1 US 53122608 A US53122608 A US 53122608A US 2012095610 A1 US2012095610 A1 US 2012095610A1
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US
United States
Prior art keywords
power
receptacle
set forth
electrical
protocol
Prior art date
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Abandoned
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US12/531,226
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English (en)
Inventor
Steve Chapel
William Pachoud
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Zonit Structured Solutions LLC
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Zonit Structured Solutions LLC
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Publication date
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Priority to US12/531,226 priority Critical patent/US20120095610A1/en
Publication of US20120095610A1 publication Critical patent/US20120095610A1/en
Priority to US13/763,480 priority patent/US9160168B2/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B15/00—Systems controlled by a computer
    • G05B15/02—Systems controlled by a computer electric
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66—Regulating electric power
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G06F1/3209—Monitoring remote activity, e.g. over telephone lines or network connections
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/3287—Power saving characterised by the action undertaken by switching off individual functional units in the computer system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/0005—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving power plugs or sockets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/12—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/717—Structural association with built-in electrical component with built-in light source
    • H01R13/7175—Light emitting diodes (LEDs)
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/10—The network having a local or delimited stationary reach
    • H02J2310/12—The local stationary network supplying a household or a building
    • H02J2310/14—The load or loads being home appliances
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/58—The condition being electrical
    • H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—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
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/30—State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Definitions

  • the present invention relates generally to electrical power distribution and management and, in particular, to an electrical outlet, or other device associated with a local (e.g., single or multiple residential or business premises) circuit, to intelligently monitor at least a portion of the circuit and control delivery of electricity over the circuit.
  • a local e.g., single or multiple residential or business premises
  • Power distribution and electrical distribution are monitored and controlled for a variety of purposes.
  • power distribution generally refers to transmission between a power plant and substations whereas electrical distribution refers to delivery from a substation to consumers. Electricity is further distributed within consumer premises typically via a number of local circuits.
  • Power distribution may be monitored and controlled in relation to addressing actual or potential over capacity conditions. Such conditions have become increasingly common in the United States and elsewhere due to increasing industrial and residential power needs coupled with aging power infrastructure and practical limitations on new power generation. Over capacity conditions are often addressed by reducing or interrupting power provided to standard residential and commercial consumers, e.g., blackouts or brownouts. For example, during periods of peak usage, a rolling blackout may be implemented where power to grid subdivisions is sequentially interrupted to reduce the overall load on the grid.
  • fuses, circuit breakers, ground fault indicators, surge protectors and the like are generally employed to interrupt or damp electricity on a circuit in the event that the current drawn by the circuit exceeds a prescribed level.
  • These elements are typically required by code and may be customized to some extent, for example, with respect to circuits for supplying high (e.g. dryers, air conditioners) or low (e.g., lighting) power devices.
  • high e.g. dryers, air conditioners
  • low e.g., lighting
  • these elements are generally unintelligent and limited to hazard avoidance. They typically do not recognize devices or device types when connected to a circuit, do not allow for addressing larger grid needs and are not sufficiently responsive for addressing certain safety issues such as potential electrocutions.
  • the present invention relates to intelligent circuit devices such as electrical outlets, e.g., standard NEMA outlets, and to customer premises electrical systems, appliances, power distribution systems and associated processes that may utilize such smart circuit devices.
  • the smart circuit devices of the present invention can monitor a load connected to a circuit and control distribution of power via the circuit.
  • the circuit devices can also be controlled via a communications interface so as to implement a local or grid policy concerning electrical delivery or usage. In this manner, power can be distributed more efficiently, outlet and building wiring safety can be enhanced and electrical grid capacity problems can be addressed more effectively. Also, the invention delivers security and convenience features.
  • a utility (including a system and associated functionality) for enabling Transmission Control Protocol/Internet Protocol (TCP/IP) communication to an outlet receptacle, e.g., a standard NEMA outlet receptacle.
  • TCP/IP Transmission Control Protocol/Internet Protocol
  • the receptacle effectively becomes a client or data network node.
  • the outlet receptacles can operate as intelligent control points for electrical distribution, providing feedback concerning the types of devices that are currently plugged into the receptacles and selectively controlling the delivery of electricity via the receptacles (including reducing power consumption by eliminating individual power waveform cycles delivered via the receptacles via fast on/off switching).
  • the receptacles can be controlled via a wide area network using TCP/IP communications so as to enable remote or intelligent operation of devices that are not otherwise adapted for data network control.
  • TCP/IP outlet technology also provides a convenient mechanism for intelligent devices to communicate via power lines to a wide area network and facilitates standardization of such devices.
  • TCP/IP has a number of advantages including the following:
  • TCP/IP is the preferred protocol for communicating to the receptacles for both technical and economic reasons.
  • TCP/IP is the standard protocol on the internet, the largest network on the planet. It is an open protocol and very unlikely to be replaced.
  • TCP implementations and supporting infrastructure continue to improve.
  • a utility for controlling delivery of power via a local (e.g., on-premises) circuit device such as a receptacle or group of receptacles based on a load analysis.
  • the utility involves monitoring at least one local circuit device to determine information regarding a loading of the local circuit device based on an analysis (e.g., digital processing) of an electrical signal transmitted via the circuit device, and controlling delivery of power via the circuit device based on the analysis.
  • the analysis may be implemented by a digital processor at the circuit device such as at an outlet or at another location (e.g., at a circuit breaker panel or elsewhere on a controlled circuit).
  • the electrical signal can be analyzed to determine a classification of an electrical device, e.g., to identify the specific electrical device or the type of electrical device (or an intelligent device can identify itself), to identify power delivery quality issues (in either the power supplied or the electrical wiring), to provide virtual GFCI functionality in specified receptacles as needed by comparing summary current measurements to neutral current, or to identify a loading anomaly or safety issue.
  • a classification of an electrical device e.g., to identify the specific electrical device or the type of electrical device (or an intelligent device can identify itself
  • power delivery quality issues in either the power supplied or the electrical wiring
  • virtual GFCI functionality in specified receptacles as needed by comparing summary current measurements to neutral current, or to identify a loading anomaly or safety issue.
  • This information may be used to, for example, reduce the power delivered to the device (e.g., via rapid switching to eliminate selected cycles of the power signal or by interrupting power to the device for a given time period(s)) or to assign the device/receptacle a priority level in the event of power reduction (e.g., a brownout).
  • the digital analysis may indicate a short circuit, a potential shock or electrocution event or other safety concern. In such cases, power to the receptacle may be interrupted. Also, if a device switch is not supposed to be on, e.g., if the resident is on vacation and a light is suddenly turned on, a security alert can be generated as well as an email alert.
  • a fast power switching function can be implemented to control power delivery.
  • Such fast switching structure can be used in at least two ways: 1) arc suppression when turning on/off main relays; and 2) fast switching when “stealing” cycles.
  • the latter function cannot be accomplished by switching relays due to the speed of operation required. Rather, this is accomplished by solid state switching such as triacs or MOS devices.
  • solid state switching such as triacs or MOS devices.
  • heat generation may be problematic, particularly in relation to implementations where the switching function is executed in an outlet box or in other constrained, unventilated contexts.
  • a fast switching device e.g., semiconductor power switch
  • a traditional mechanical relay each controlled by a combination of analog and digital circuitry.
  • the semiconductor switching devices e.g., triacs, Metal Oxide Semiconductors, etc.
  • the mechanical, relays are relatively slow but produce little heat.
  • a local circuit device such as a receptacle module communicates with a controller via electrical power wiring of the premises.
  • An associated subsystem includes an electrical device that receives power through electrical wiring of a customer premises via an electrical circuit and a switch module, associated with the local circuit device, for controlling delivery of power to the electrical device.
  • the utility further includes a receptacle controller for controlling operation of the switch module.
  • the switch module and the receptacle controller preferably communicate via the electrical wiring using an internet communication protocol (e.g., UDP and/or TCP/IP) or use other protocols which a local controller (e.g., an internet connected device) can gateway and/or proxy to TCP/IP such that the switch module and/or a device plugged into the receptacle of a switch module can communicate via TCP/IP.
  • the subsystem can be used to coordinate power delivery via the receptacle in relation to a larger power distribution system, e.g., the power grid. Alternatively, the subsystem can be used to allow for monitoring and controlling operation of the electrical device remotely, e.g., via the internet.
  • the present invention can also be implemented in the context of a data center.
  • Data centers often include a power strip including outlets associated with two separate sources.
  • a power strip product is being developed by Zonit Structured Solutions.
  • the power strip can thus implement switching functionality as discussed above so as to provide redundant power supplies, e.g., for critical data devices.
  • switching functionality can be implemented as discussed above so as to provide redundant power supplies, e.g., for critical data devices.
  • a controller can communicate with the receptacles by TCP/IP protocol, as discussed above.
  • TCP/IP protocol When using power lines for such communications, it is useful to provide some mechanism to avoid cross-talk. That is, because the power lines that ultimately extend between multiple receptacles effectively define a single electrical bus or sit on interconnected waveguides, instructions from the controller intended for a first receptacle could be received by and acted upon by a second receptacle absent some mechanism to limit the transmission of message or to allow receptacles to discriminate as between received messages.
  • An addressing mechanism for addressing message to individual receptacles of a set of controlled receptacles can address the issue within a given control domain.
  • Attenuation relates to employing a frequency dependent filter to selectively exclude the frequency or frequencies used to communicate via the internal power wiring from transmission to the external power network.
  • control functionality discussed above can be implemented at an electrical device rather than at an outlet or other local circuit device (or at an intermediate unit interposed between the electrical device and the outlet). That is, from a communications viewpoint, there is little distinction between the device and the outlet where the device is plugged in; communications can be transmitted via the power lines all the way to the device.
  • the smart switch or other communication and control technology can alternatively be implemented by custom manufactured or retrofitted devices.
  • data may be accumulated and viewed (via an LCD or LED panel or web interface) at a power strip, an associated controller or remotely.
  • the need for additional cabling to support instruments is reduced, thereby simplifying servicing, conserving rack space and enhancing cooling airflow.
  • an intelligent electrical outlet includes a receptacle for receiving a standard electrical plug so as to establish an electrical connection—between a device associated with the plug and a premises wiring system associated with the receptacle—and a digital processor for controlling delivery of power via the receptacle.
  • the digital processor may be embodied in a circuit board that can be housed within a standard outlet housing, e.g., to execute the fast power switching functionality as described above. In this manner, intelligent monitoring and control can be implemented at the individual outlet level or individual receptacle level of a power distribution system.
  • a power distribution system that allows for greater monitoring or control of power distribution, including control at the customer premises level.
  • the system includes a power grid for distributing power over a geographic distribution area, one or more grid controllers for controlling distribution of power across the power grid and a number of customer premises (local) controllers.
  • Each of the customer premises controllers control delivery of power within a particular customer premises based on communication between the customer premises controller and at least one of the grid controllers.
  • the customer premises controllers may be implemented at the customer premises level and/or at the individual outlet level within customer premises.
  • the local controller may execute purely local policies, policies driven by external (e.g., grid) controllers, or combinations thereof.
  • the local controller may control power delivery based on local policies concerning branch wiring current limits, security policies, safety policies, or other policies not requiring communication with or coordination with a grid controller or other external controller.
  • the local controller may be utilized to execute a grid-based or other external policy, such as a brownout operating mode.
  • the local controller may make decisions based on both local and external considerations.
  • a grid controller may instruct local controllers, on a mandatory or voluntary basis, to operate in conservation mode. Local controllers may then execute a conservation mode of operation in accordance with local policies, e.g., concerning which devices may be turned off or operated in reduced power mode or which devices have priority for continued operation.
  • a method for addressing over-capacity conditions in a power distribution grid.
  • the method includes the steps of identifying an over-capacity condition with respect to at least a portion of a power distribution grid and addressing the over-capacity condition by controlling power distribution at a level finer than the finest distribution subdivision of the power distribution grid.
  • the over-capacity condition relates to a condition potentially requiring reduction of power provided to standard residential and commercial customers, e.g., conditions that have conventionally resulted in blackouts or brownouts.
  • a rolling blackout as discussed above, where a grid is divided into a number of grid subdivisions, and power to these grid subdivisions is sequentially interrupted to reduce the overall load on the grid.
  • the present invention allows for addressing such conditions at a finer or more flexible level than these network subdivisions.
  • individual residences, commercial clients, or any desired set of customer premises can be managed as a group independent of grid topology.
  • power distribution may be controlled at the electrical distribution rather than the power distribution portion of the distribution network.
  • power distribution generally refers to transmission between a power plant and substations whereas electrical distribution refers to delivery from a substation to the consumers.
  • power distribution may be controlled at the customer premises level or even at the outlet level within a customer premises.
  • power distribution may be controlled by reducing the delivery of power, e.g., by eliminating certain cycles, or by interrupting power distribution.
  • blackouts or brownouts can be avoided or implemented more intelligently so as to avoid the harm or inconvenience associated with such blackouts or brownouts.
  • a system for controlling a device that is plugged into a smart outlet.
  • the system can be used in a variety of contexts, including data center control, as well as controlling electrical devices in a residential or business environment.
  • the system includes a local controller and one or more smart outlets.
  • the local controller can communicate with a remote controller via a first protocol and with the smart outlet via a second protocol the same or different than the first protocol.
  • the local controller can function as a protocol gateway to translate messages between the first and second protocols.
  • the local controller may communicate with the remote controller via a wide area network such as the internet.
  • the local controller may communicate with the smart outlet via power lines, wirelessly or via another communications pathway.
  • communications between the local controller and the smart outlet are preferably conducted in accordance with a TCP/IP protocol adapted for the local environment.
  • the local controller is implemented in conjunction with a power distribution unit of a data center.
  • the smart outlet may be implemented in conjunction with a data center power strip.
  • data center equipment can be conveniently controlled from a remote location.
  • data center devices such as temperature sensors, humidity sensors or door lock sensors, can report to a remote location as may be desired.
  • a local controller can function as a communications gateway for multiple appliances, smart receptacles or combinations of appliances and smart receptacles associated with the local controller.
  • the local controller can execute TCP/IP over power wiring functionality or other data protocol.
  • the local controller can then gateway all local devices to a WAN. In this manner, all local appliances can communicate to and be controlled via the WAN.
  • Some examples of what this enables include: allowing a smart refrigerator to order food from a market as necessary; allowing a furnace to report via the WAN that it is leaking carbon monoxide into the forced air; and an air conditioner can report via a WAN that the fan motor is about to fail.
  • the local controller can gateway such communications in at least the following ways.
  • such communications can be TCP/IP from end-to-end.
  • the local controller thus acts as a TCP/IP router (and power line inserter).
  • the local controller may also act as a firewall. In this case, both endpoints of the communication “speak” TCP/IP.
  • the local controller may gateway and proxy between TCP/IP and another communications protocol (over power wiring). Again, the local controller acts as a gateway router and can act as a firewall.
  • the appliance being controlled speaks in its native communications protocol (which could be used to encapsulate TCP/IP) to the local controller and the local controller speaks TCP/IP (which, inversely, can be used to encapsulate the appliance communication protocol) to the WAN.
  • the TCP/IP gateway provided by the local controller as discussed above has several functions.
  • the gateway provides universal and uniform TCP/IP WAN connectivity. All smart receptacles and electrical devices connected to them with suitable adapters or internal hardware can communicate via TCP/IP to a WAN (the Internet) via local controller. This can be done regardless of what protocol is used to communicate over the power wiring in the facility, but is preferred to be via TCP/IP also.
  • the TCP/IP communication functions offered by the controller are those which are commonly used to interconnect any two TCP/IP networks. Some of which include the following:
  • TCP/IP Data transmissions from smart receptacles and devices on the power-wiring network to the TCP/IP WAN are enabled and vise versa.
  • Protocol Encapsulation If one or more non-TCP protocols are used by smart receptacles and/or devices on the power-wiring network, they can be hi-directionally encapsulated and thereby enable end-to-end communication between the device on the power wiring network and an endpoint on the TCP/IP WAN.
  • TCP/IP can be used to encapsulate the protocol(s) used on the power wiring network and inversely the power wiring network protocol can be used to encapsulate TCP/IP to a receptacle or device on the power-wiring network. The latter is possible but not a preferred method.
  • Proxy Server Function If it is desired all devices on the power-wiring network can be proxied by the TCP/IP proxy functionality of the controller. This may be a convenient way to communicate with and control the receptacles and devices on the power-wiring network.
  • the gateway also provides security and privacy functionality.
  • the TCP/IP gateway in the local controller also acts as a firewall to monitor and control the data connections from the power wiring network smart receptacles and attached electrical devices to devices on the TCP/IP WAN. Policies can be set to control, limit and report on this connectivity. In this way the privacy and security of the homeowner or facility owner can be safeguarded.
  • FIGS. 1A and 1B illustrate front and side views, respectively, of a smart outlet box in accordance with the present invention
  • FIG. 2 is a schematic diagram of a smart outlet system in accordance with the present invention.
  • FIG. 3 is a schematic diagram of a smart outlet system implemented in a wide area network context in accordance with the present invention.
  • FIGS. 4A and 4B illustrate a power distribution grid utilizing smart outlet technology in accordance with the present invention
  • FIG. 5 is a flow chart illustrating a process for controlling electrical devices utilizing a smart outlet system in accordance with the present invention
  • FIG. 6 illustrates a smart outlet system in accordance with the present invention implemented in a data center context in accordance with the present invention
  • FIG. 7 is a flow chart illustrating a process for controlling devices in a data center context in accordance with the present invention.
  • FIG. 8 is a schematic diagram of a controlled set of receptacles showing how signals are inserted into power lines and prevented fro being transmitted to external power lines;
  • FIG. 9 is a schematic diagram showing GFCF circuitry in accordance with the present invention.
  • the present invention is directed to intelligent local circuit devices that can control power delivered to an electrical device via a circuit and/or report information about or from an electrical device connected to a circuit.
  • This allows for remotely monitoring and/or controlling electrical devices, including standard electrical devices that are not specially adapted for such remote monitoring or control, which could be useful in a wide variety of applications.
  • the invention is set forth in the context of standard NEMA electrical receptacle outlets provided with logic for monitoring connected loads and sampling power waveforms (e.g., electrical appliances and devices) and for selectively controlling power delivered via the outlets. Thereafter, certain systems for taking advantage of this functionality are described. In particular, power grid distribution systems and data center equipment control and power distribution systems are described. It will be appreciated that circuit devices other than electrical receptacle outlets, and applications other than the noted power grid and data center applications, are supported by the technology of the present invention. Accordingly, the following description should be understood as illustrative and not by way of limitation.
  • the illustrated outlet 100 includes two standard receptacles 102 accessible through a faceplate 104 .
  • Each of the receptacles 102 includes a receptacle body 106 for receiving a standard electrical plug and establishing an electrical connection between prongs of the plug and wiring 110 associated with the wiring system of the customer, premises, e.g., a residence or business.
  • the illustrated receptacle 100 further includes a controller 108 mounted within the outlet housing 112 in the illustrated embodiment.
  • the controller 108 may be embodied as an integrated circuit board.
  • the controller 108 is operative for monitoring a loading with respect to each of the receptacles 102 and controlling delivery of power to the receptacles 106 . For example, this may be done to classify an electrical device connected via the receptacles 106 or to identify a safety hazard. Delivery of power to the receptacles 102 may be controlled to alleviate a safety concern, to enhance efficiency of power distribution, to remotely control an electrical device connected to one of the receptacles 102 , or to address a potential or actual over capacity condition of a power grid.
  • the controller 108 may also be operative for communicating with other controllers, e.g., within the customer premises, at a separate customer premises or with network controllers outside of the customer premises. For example, such communications may be conducted via power lines, wirelessly or via other communications pathways.
  • FIG. 2 is a schematic diagram of a power distribution system 200 in accordance with the present invention.
  • the illustrated system 200 includes an electrical device 202 that is plugged into an electrical receptacle 204 .
  • the receptacle 204 selectively receives power from a power source 208 , such as an electrical grid, via a switch 206 .
  • the switch 206 may be located at the receptacle 204 or at a remote location, such as at a circuit breaker board or other location associated with a circuit for providing electricity to the receptacle 204 .
  • the switch 206 is operated by a processor 212 based on monitoring of an electrical signal at the receptacle 204 .
  • the processor 212 may be located at the receptacle, at a separate location on the customer premises (e.g., a computer configured to control a number of outlets) or at another location.
  • the signal at the receptacle 204 may be monitored to identify an electrical signature that identifies the device 202 or the type of the device 202 , it will be appreciated that different types of electrical devices have different characteristics in relation to how they load the electrical system. For example, an electrical pump may have a different signature than an electrical light.
  • This signature may relate to the power drawn, a time-dependent characteristic of the power drawn, or other cognizable signal characteristic from the power signal delivered via the receptacle 204 .
  • an intelligent device may identify itself to the receptacles, e.g., by transmitting a standard identification code.
  • the nature of the signature may be determined theoretically or empirically. For example, heuristic logic may be used to learn and parameterize electrical signatures for different devices of interest. Such signature information can then be stored in a signature database 214 . Accordingly, the illustrated system 200 includes an analog-to-digital converter 210 for digitally sampling the electrical signal at the receptacle 204 and providing digital information representative of the signal to the processor 212 . This digital information is then processed by a signature recognition module 216 of the processor 212 to identify the signature. For example, the input digital signal may be processed by algorithms to determine a number of parameters of the signal, which can then be compared to parameters stored in the signature database 214 to match the input signal to one of the stored signatures. It will be appreciated that the signature information can also be used to determine a state of the device 202 or to detect an output from the device (e.g., in the event that the device 202 is a sensor that provides an output signal).
  • An output from the signature recognition module 216 can then be used by a decision module 218 to control delivery of power to the receptacle 204 .
  • the decision module 218 may also use information input from a controller 220 , which may be disposed at the outlet, elsewhere in the customer premises (such as a computer), or at another location.
  • the controller is in communication with the larger power distribution system, e.g., the power grid. For example, if the device 202 is recognized as a device that can function at a reduced power level, the decision module 218 may operate the switch 206 to reduce power delivery to the receptacle 204 .
  • the controller 220 may direct the decision module 218 to go into a power saving mode. For example, this may occur when an over-capacity condition is identified with respect to the power grid or a portion of the power grid. In such cases, the decision module 218 may reduce or eliminate power delivery to certain classes of devices.
  • the signature recognition module 216 may determine that the device 202 does not match any signature authorized for use at the receptacle 204 .
  • the decision module 218 may operate the switch 206 to interrupt delivery of power from the source 208 to the receptacle 204 .
  • the decision module 218 may interrupt power delivery in the event of a potential short circuit, a potential shock or electrocution, or other potential safety hazard event.
  • the system 200 may be used for a variety of other purposes.
  • the processor 212 may operate the switch 206 to turn on lights or operate other electrical equipment on a periodic or random basis to create the illusion that the premises are occupied and thereby discourage crime.
  • the processor may monitor the receptacle 204 , for example, to identify activities when the premises are supposed to be vacant, thereby identifying possible crime or unauthorized use.
  • the processor 212 may be used to allow for remote control of the receptacle 204 , for example, to allow an owner to remotely operate electrical devices via the internet.
  • the various functional components noted in this discussion may be combined on a common platform or distributed across multiple platforms (e.g., at the outlet, a separate customer premises platform or other platforms) in any appropriate manner.
  • FIG. 3 illustrates a system 300 in accordance with the present invention for enabling remote monitoring and/or control of multiple receptacles.
  • the system 300 includes a number of smart receptacles 302 , which may be, for example, receptacles as discussed above in connection with FIGS. 1A and 1B .
  • the receptacles 302 communicate with a local controller 304 , which may be, for example, a computer or internet terminal located at the customer premises.
  • the smart receptacles 302 and the local controller 304 may communicate via an interne protocol (e.g., TCP/IP) or a proprietary protocol that is gatewayed to the WAN over electrical wires of the customer premises.
  • TCP/IP an interne protocol
  • the local controller 304 can, in turn, communicate with a remote controller 308 via a wide area network 306 such as the interne.
  • the communication between the local controller 304 and the remote controller 308 may involve wireless (e.g., IEEE 802.11, Wi-Fi, telephony or other wireless) or other data network links.
  • the remote controller 308 may be operated by a private or public party.
  • the remote controller may comprise a computer used by an owner of the customer premises to remotely control the receptacles 302 , a computer monitored by a security contractor to monitor activities at the receptacles 302 , a controller of the power grid operated to implement intelligent blackouts or brownouts or any other entity.
  • FIG. 4A illustrates a power distribution network 400 for intelligently controlling power distribution.
  • the illustrated network 400 includes a number of customer premises 402 connected to a power grid 403 .
  • the power grid 403 receives power from a number of power facilities 408 , and distribution of power across the grid 403 is controlled by a central grid control system 406 and, optionally, a number of regional controllers 404 , such as substations.
  • each of the customer premises 402 may include a number of intelligent outlets. These outlets may be controlled in response to instructions from the central control system 406 or regional controllers 404 .
  • the customers may choose to or be required to install intelligent outlets that operate in response to such instructions from the central control system 406 or regional controllers 404 to reduce power consumption on a routine basis or in the event of over-capacity conditions.
  • control messaging need not be via power lines and that such control is not limited by network topology.
  • FIG. 4B control messages are directed to individual customer premises via a separate network such as the internet 411 .
  • a given set of instructions can be delivered to a subset of residences (shaded) independent of power network topology associated with substation 404 .
  • instructions may be implemented on a scale finer than individual residences, e.g., on an outlet-by-outlet basis (as indicated by partially shaded residences). In this manner, for example, a brownout may be implemented intelligently, e.g., by interrupting power to non-critical devices and/or stealing power cycles from appropriate types of devices.
  • FIG. 5 illustrates a process 500 for monitoring and controlling electrical devices in accordance with the present invention.
  • This process 500 will be described in relation to applications that enable monitoring and remote control of electrical devices connected to smart outlets as described above, including applications for allowing control of electrical devices by the operator of a power grid.
  • the illustrated process 500 is initiated by establishing ( 502 ) network policies related to power usage within the network.
  • network policies may be established by an electrical utility in order to address potential or actual overcapacity situations that have previously been addressed, for example, by rolling blackouts or brownouts. It will be appreciated that these policies may be established in any way that is deemed useful by the power provider.
  • the highest loads e.g., air conditioning, electrical heating, etc.
  • the highest loads e.g., air conditioning, electrical heating, etc.
  • instructions may be sent to residences or executed at residences in a random, pseudo random or otherwise time distributed manner.
  • a residence may be assigned an identification code by a random number generator.
  • instructions to execute the brownout mode may be sent out or executed on a time dependent basis as a function of code, e.g., at a given time, the brownout mode may be executed by all residences having an identification that ends in the number “5.” Statistically, this can he accomplished in a way such that the peak load will be reduced by the needed percentage, but the impact to end users is minimized.
  • critical loads e.g., refrigerators, lights, radios, radiant heating circulation pumps, etc.
  • Non-critical items may be disabled.
  • local rules are established ( 504 ) for implementing the network policies.
  • This optional implementation allows residential or business customers to have some input, for at least some policies, as to how such policies will be implemented.
  • the customer may define which appliances or devices are critical for purposes of executing a brownout or blackout policy.
  • a customer may be allowed to determine whether a prescribed energy reduction will be executed by disabling devices, reducing power drawn by devices or some combination thereof.
  • consumers may be allowed to request time periods during which energy use will be reduced in order to achieve the purposes of the policy at issue. Though it may not be possible, as a practical matter, to accommodate all such requests, some requests may be accommodated at least to an extent, thereby reducing the impact on users.
  • Additional local policies and rules may be established ( 506 ) to take advantage of the smart outlets. For example, a customer may choose to operate in an efficiency mode at certain times or under certain conditions (e.g., while on vacation or when the premises are otherwise vacant). In addition, as noted above, a customer may wish to monitor the types of devices that are connected at individual receptacles or power usage, for example, for security purposes.
  • the customer may wish to be notified of certain events, e.g., when a light is turned on when no one is supposed to be present at the premises, to have a third party notified of certain events (e.g., a security or emergency service provider) or to prohibit certain uses (e.g., to prohibit use of lights, equipment, operation of electronic door locks or the like at certain times or under certain conditions).
  • a third party notified of certain events e.g., a security or emergency service provider
  • prohibit certain uses e.g., to prohibit use of lights, equipment, operation of electronic door locks or the like at certain times or under certain conditions.
  • policies that may be implemented by a customer include the following:
  • devices such as lights, radios and the like may be turned on and off in a random, pseudo random or selected pattern to make the home or business appear occupied. This may be preprogrammed or controlled, for example, by the home/business owner, from a remote location. In the latter regard, the devices may be controlled remotely via appropriate messages transmitted via the internet or another network.
  • an email alert may be sent to a selected address in the event that a device is manually turned on. Alternatively or additionally, a security or emergency service provider may be contacted.
  • an occupant can program when to turn on/off any device. For example, selected devices may be turned on or off in predetermined relation to a wake up time, departure for work time, return from work time or bedtime.
  • the system can automatically turn off lights or other devices during preset time periods. For example, specified receptacles may be turned off during time periods where the residence is normally unoccupied or the residents are asleep.
  • devices can be monitored to determine when they have been manually turned off. When this occurs, the system may assume the occupant wants to turn the device back on manually and therefore turn on the receptacle.
  • the user can select to disable certain receptacles that can be reached by small children or unused receptacles that are in a child's bedroom.
  • the system of the present invention can detect short circuits in very short times (e.g., in 1/60 of a second or less), the potential for serious electrical shocks is greatly reduced, not to mention the damaged caused to equipment by short circuits.
  • the ability to analyze the power signature at the receptacles and then compare it to a standard or threshold has a number of benefits, including the following:
  • Circuits can be “de-rated” if their wiring is old or otherwise deteriorating.
  • the receptacle or set of receptacles on a circuit can be programmed to only allow a certain total current load, which can be set below the code and circuit breaker level.
  • the central unit monitors the total current load on a branch and can proactively control the load by switching off loads or reducing power to certain receptacles.
  • the central unit determines which outlets area connected on which circuit legs via power signature analysis.
  • the ordering of what receptacles get switched off or reduced power can be set via policy as to the load type. This policy can be manually adjusted or overridden if desired or can be mandatory.
  • This type of active power management can help make the premises less fire prone, In this regard, it is noted that many home fires are caused by electrical wiring problems. Accordingly, this type of system may be dictated by a code arid/or rewarded by insurance providers.
  • a receptacle can be instructed to switch off the panel breaker for the circuit by inducing a short circuit for a period of time, tripping the breaker or switch off all the receptacles on that branch circuit. If this is not effective to open the breaker, an alert can be sent out via the communications pathways described above. Such an alert can be sent out for any life safety condition or other specified condition.
  • loads are monitored ( 508 ) to identify load signatures.
  • different devices may have different signatures that can be identified by analyzing the power signal or may communicate an identification code to the controller.
  • a controller such as a local controller discussed above can develop ( 510 ) and update a load map for supportive receptacles on the premises.
  • the local controller may store an estimate as to what devices or classes of devices are plugged in via what receptacles of the premises.
  • a controller such as a local controller may identify ( 512 ) a condition governed by policy.
  • a condition governed by policy.
  • the condition may be identified based on receipt of an instruction from the external source.
  • the local controller may receive a message from the electrical utility provider specifying transition to an efficiency mode or a brownout mode.
  • the condition may be identified based on the occurrence of a programmed policy condition. For example, if efficiency mode operation requires that certain receptacles be turned off at certain time periods, the beginning of such a time period may be identified as a condition governed by policy.
  • the existence of a condition governed by a policy may be identified based on analysis of load information communicated from a smart receptacle to the local controller. For example, over loading of a circuit, manual operation of a device in contravention of a policy, or other loading based conditions may be identified.
  • a controller such as the local controller may access ( 514 ) rules for implementing the relevant policy.
  • rules may be applied ( 516 ) in relation to all supported receptacles or a specified subset thereof so as to give effect to the desired policy.
  • instructions may be transmitted ( 518 ) to the affected receptacles by the local controller. These instructions may, for example, cause a receptacle to be turned on, to be turned off or to operate in a reduced power usage mode. The smart receptacle then operates to execute ( 520 ) the instructions.
  • the smart receptacle may include a fast operating switch operable in conjunction with a traditional mechanical relay as discussed above.
  • This switch and associated relay can be operated to turn the receptacle on, to turn it off or to steal cycles from the power signal.
  • the switch can be controlled by analog or digital devices to execute such switching at or near a zero potential point of the power signal so as to reduce the potential for arcing.
  • a switch is preferably designed to function within the heat budget of the application environment.
  • receptacle boxes may, in some cases, be surrounded by insulation such that heat dissipation is largely limited to heat transfer across the face plate.
  • the present invention can be implemented within the associated heat budget.
  • face plate structures can be modified to provide a larger heat budget for operation of the system.
  • the associated electrical boxes can extend some distance from the wall so as to provide greater heat transfer surfaces or active heat dissipation, e.g., by miniature fans, can be employed.
  • Another application where it may be desired to control electrical devices in accordance with a policy or to allow for remote control of such appliances is the data center environment.
  • it is often useful to be able to control power to electronic data processing equipment. This capability is especially useful for situations where the equipment is densely packed as in a data center of far away from the user who desires to control the equipment.
  • FIG. 6 illustrates a system 600 for enabling such control in a data center environment.
  • the illustrated system 600 includes a number of data center devices 601 - 609 .
  • These devices 601 - 609 include a number of data devices 601 - 606 such as servers, storage devices and the like.
  • the devices 601 - 609 include a number of sensors 607 - 609 such as temperature sensors, humidity sensors, cage or cabinet door lock sensors and the like.
  • the devices 601 - 609 are typically mounted in one or more two- or four-post equipment racks data center racks.
  • the devices 601 - 609 are plugged into receptacles 612 , 634 and 644 associated with a number of power strips 610 , 630 and 640 .
  • these receptacles 612 , 634 and 644 may be smart receptacles as generally described above.
  • the power strips 610 , 630 and 640 are connected by power lines to a local controller 650 .
  • the local controller 650 may be built into a data center power distribution unit such as marketed by Zonit Structured Solutions.
  • the power distribution unit includes a number of output ports 654 for outputting power from power sources 660 to the power strips 610 , 630 and 640 .
  • the power distribution unit may be associated with multiple power sources 660 such as an A source and a B source so as to provide redundant, fail-safe power to critical equipment.
  • different ones of the output ports 654 may be associated with different ones of the power sources.
  • certain equipment may have connections to multiple power strips, as generally indicated in phantom by redundant power strips 620 , so as to provide fail-safe operation.
  • such critical equipment may be equipped with multiple power cords or an appropriate cord assembly with a fast-switching unit may be provided as described in U.S. Provisional Patent Application Ser. No. 60/894,842, and U.S. Patent Application Ser. No. [not yet assigned], which claims priority therefrom, which are incorporated herein by reference.
  • the illustrated system 600 includes a number of elements remote and/or policy based operation of the devices 601 - 609 :
  • the local controller 650 includes a processor 655 such as a single board computer for executing local controller functionality as described above.
  • the processor 655 enables wired or wireless communication between the local controller 650 and a remote controller 670 via a network interface 680 .
  • the processor 655 also enables communication between the local controller 650 and the smart receptacles 612 , 634 and 644 .
  • Such communications between the local controller 650 and remote controller 670 may be conducted via the internet using a standard internet protocol involving TCP/IP protocol and utilizing TCP/IP and UDP packets.
  • Communications between the local controller 650 and the receptacles 612 , 634 and 644 are also preferably conducted in accordance with a TCP/IP protocol and may be adapted for the local environment.
  • the communications between the local controller 650 and the receptacles 612 , 634 and 644 may be conducted via the power lines, wirelessly in accordance with an IEEE 802.11 protocol or in any other appropriate fashion. It will be appreciated that customized messaging may be provided in this regard to accomplish the purposes of the system 600 .
  • the processor 655 can function as a protocol gateway to translate between the protocol for communications between the remote controller 670 and the local controller 650 and the protocol used for internal messaging between the local controller 650 and the receptacles 612 , 634 and 644 .
  • Devices can be plugged into the smart receptacles and use the controller as a gateway to the data center LAN (instead of or in addition to the WAN).
  • each of the output ports 654 of the local controller 650 may be associated with a power wire communications interface 651 - 653 .
  • These interfaces 651 - 653 are operative to induce messaging signals in the power lines as well as to remove incoming messaging signals from the power lines so as to provide effective electrical isolation of the different communication pathways.
  • Similar power line messaging interfaces 611 , 631 - 633 and 641 - 643 are provided in connection with the power strips 610 , 630 and 640 for the same reasons.
  • Each individual receptacle of a power strip may be controlled independently or all receptacles of a power strip may be controlled as a group in accordance with the present invention.
  • all of the receptacles 612 of the strip 610 are associated with a single communications interface 611 .
  • all of the receptacles 612 of the strip 610 may be associated with a common logical element for monitoring electrical signatures or receiving messages from the devices 601 - 603 .
  • each receptacle 634 and 644 of the power strips 630 and 640 is associated with its own independent communications interface 631 - 633 and 641 - 643 in the illustrated embodiment.
  • each receptacle 634 and 644 may have dedicated wiring or the signals transmitted through the power wiring may be multiplexed with respect to the individual receptacles (e.g., time division multiplexed, frequency division multiplexed, code-division multiplexed, etc.).
  • the devices 604 - 609 associated with the receptacles 634 and 644 can be individually controlled, and the devices 604 - 609 can independently message the local controller 650 and intern, in turn, the remote controller 670 .
  • FIG. 8 shows a control system 800 for a set of receptacles defining a controlled domain.
  • the receptacles may include a number of receptacle outlets 802 (typical for home or business environments) and/or a number of plug strips 805 or adaptors (typical for data center environments) that may be arranged in one or more branch circuits 806 .
  • the receptacles are controlled by a local controller 808 , which may be, for example, embodied in a personal computer (typical for home or business applications) or in a single board computer incorporated into a power distribution unit of a data center.
  • the local controller uses a transceiver 810 to insert signals into the main 812 and branch circuits 806 for communication to the receptacles and to receive signals from the receptacles.
  • a signal isolation device 814 which may be a signal canceller or a signal attenuator as described above, substantially prevents transmission of these signals to external (outside of the controlled domain) power lines 816 . This structure may be replicated for A and B power sources in a data center.
  • FIG. 7 illustrates a process 700 that may be implemented in connection with operation of the present invention in the data center context.
  • the process 700 is initiated by establishing ( 702 ) rules for devices or classes of devices. For example, these rules may define preferences for powering up or powering down devices, establish groups of devices to be controlled collectively, determine who may access devices and at what times, etc.
  • the process 700 further involves developing ( 704 ) a map of output/outlet pairings. In this regard, it is possible to identify devices or classes of devices based on a signature analysis as described above. Alternatively, a data center user may define what devices are connected to what receptacles of what power strips and what power strips are attached to what outlet ports of the power distribution units.
  • the user can define groups of devices that will be operated collectively (e.g., by plugging the devices into a power strip that is operated as a unit) and can specify critical devices for fail-safe operation. Such operation can then be executed simply by plugging the devices into the correct outlets of the correct power strips and plugging the power strips into the correct output ports of the power distribution unit. Execution of this power structuring may be facilitated by way of appropriate indicators, such as LEDs or small display units provided on the power strips and/or the power distribution unit. In this manner, the devices can be easily plugged ( 706 ) into appropriate outlets.
  • the power strips or the individual receptacles then receive ( 708 ) an input from the device or the local or remote controller.
  • an operator of a remote controller unit may choose to power down or power up a device or set of devices.
  • An appropriate message is transmitted from the remote controller to the local controller, and this is in turn communicated from the local controller to the power strip or receptacle via the power wiring as discussed above.
  • a signal such as a power signal for signature analysis or a sensor output signal, may be received at the receptacle from one of the devices and communicated to the local controller (and, if appropriate, to the remote controller). Any such input is then processed ( 710 ) using the noted map and appropriate rules.
  • an instruction from a remote controller to power down certain devices can be executed by consulting the map to identify the outlets associated with the appropriate devices and then communicating a power down signal to those receptacles.
  • a signal from a device such as a sensor may be interpreted by consulting the map to determine what sensor transmitted the signal and then accessing and applying the appropriate rules for processing the signal.
  • the current interrupting ability of the receptacle described above permits using an additional bifilar wound transformer for sensing unbalanced current in the load and interrupting the power delivery to the load in certain conditions.
  • This feature is generally similar to common ground fault circuit interruption (GFCI) devices. It differs in that it utilizes the general purpose disconnect relay for the actual disconnection means in the event a Unbalanced current condition exists. It also differs in that the detection and decision to disconnect is not performed in the same way as a traditional GFCI, in that the microprocessor control used for the signature detection also has the ability to analyze the current sense data from the bifilar wound transformer and in doing so can filter out unwanted or alias current transients.
  • GFCI common ground fault circuit interruption
  • an additional bifilar wound transformer 902 is added in the current path, similar to traditional GFCI, and the sensed current “differential” is amplified by the high gain differential amplifier 901 .
  • the signal is presented to the Sense and Control Module 903 where a 4 bit ladder analog to digital (A to D) converter converts the incoming analog signal to a digital signal.
  • a to D 4 bit ladder analog to digital
  • the data is processed on an interrupt basis in the microprocessor. If any data appears at the output of the ladder A to D, the processor stops what it is doing and begins analysis of the incoming data stream from the GFCI sense transformer. At this point signature analysis algorithms similar to the algorithms used for general current load analysis are applied to the incoming data.
  • the power control relays 940 , 950 are energized, thus in turn disconnecting the AC power source from each of the load receptacles 907 , 908 . Since the current sense is in the primary power path, both relays must be energized.
  • the vent is recorded temporarily in the sense and control module 903 and sent to the Central Command Processor via the current transmitter 909 .
  • the vent data is also forwarded to the central command processor for additional analysis.
  • the Central Command Processor can determine if the event data was false or true and act accordingly, or it can wait for user intervention and submit a reset. At any time, either the Central Command Processor, or a local user can reset the GFCI interruption condition. This can be accomplished by either receiving a command from the Central Command Processor via the Current Receive Modulator 909 or from manualreset button on the receptacle 906 by direct user intervention.
  • Power can be momentarily restored to one receptacle at a time. If the GFCI event still exists, a determination can be made which receptacle is responsible at this time, and the associated LED 910 or 911 can be illuminated and/or flashed.
  • LEDs 910 , 911 allow other useful functions to be included in the Zonit Smart Receptacle.
  • These LEIS 910 , 911 can be controlled from the Central Command Processor.
  • User interface there can initiate several functions using the LEDs 910 , 911 located adjacent to each of the receptacles 907 , 908 .
  • Some of the functions include, but are not limited to:
  • the LEDs 910 , 911 are connected to the Sense and Control Module 903 . It receives information either locally from the current sense coils in the relays 940 , 950 from the Current Sense Transformer 902 , the local manual reset button 906 , or from the Central Command Processor via the Current Receive Modulator 909 . The various information associated with the LED functions is analyzed by the Sense: and Control module and the appropriate LED 910 and 911 is illuminated or extinguished as needed.
  • the LEDs 910 , 911 are high illumination types, as much as 1 watt each.
  • the Sense and control Module 903 can pulse width modulate the power to the LEDS 910 , 911 to provide a low level output of light. An “indicator light” level of output. For Night Light operation, a higher level of output can be initiated, as much as a continuous on state (no modulation).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
US12/531,226 2007-03-14 2008-03-14 Smart nema outlets and associated networks Abandoned US20120095610A1 (en)

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US12/531,226 US20120095610A1 (en) 2007-03-14 2008-03-14 Smart nema outlets and associated networks
US13/763,480 US9160168B2 (en) 2007-03-14 2013-02-08 Smart electrical outlets and associated networks

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US89484607P 2007-03-14 2007-03-14
US12/531,226 US20120095610A1 (en) 2007-03-14 2008-03-14 Smart nema outlets and associated networks
PCT/US2008/057150 WO2008113052A1 (en) 2007-03-14 2008-03-14 Smart nema outlets and associated networks

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US16/229,195 Continuation-In-Part US20190361474A1 (en) 2007-03-14 2018-12-21 Power distribution systems and methodology

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US12/531,226 Abandoned US20120095610A1 (en) 2007-03-14 2008-03-14 Smart nema outlets and associated networks
US12/569,377 Active US8374729B2 (en) 2007-03-14 2009-09-29 Smart electrical outlets and associated networks
US13/757,156 Abandoned US20140025221A1 (en) 2007-03-14 2013-02-01 Smart electrical outlets and associated networks
US13/763,480 Active US9160168B2 (en) 2007-03-14 2013-02-08 Smart electrical outlets and associated networks
US14/717,899 Active US9958925B2 (en) 2007-03-14 2015-05-20 Smart electrical outlets and associated networks
US15/655,620 Active US10050441B2 (en) 2007-03-14 2017-07-20 Premises power signal monitoring system
US15/656,229 Active 2028-09-11 US10698469B2 (en) 2007-03-14 2017-07-21 Premises power usage monitoring system

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US12/569,377 Active US8374729B2 (en) 2007-03-14 2009-09-29 Smart electrical outlets and associated networks
US13/757,156 Abandoned US20140025221A1 (en) 2007-03-14 2013-02-01 Smart electrical outlets and associated networks
US13/763,480 Active US9160168B2 (en) 2007-03-14 2013-02-08 Smart electrical outlets and associated networks
US14/717,899 Active US9958925B2 (en) 2007-03-14 2015-05-20 Smart electrical outlets and associated networks
US15/655,620 Active US10050441B2 (en) 2007-03-14 2017-07-20 Premises power signal monitoring system
US15/656,229 Active 2028-09-11 US10698469B2 (en) 2007-03-14 2017-07-21 Premises power usage monitoring system

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EP (1) EP2132842A4 (xx)
CN (1) CN101682179B (xx)
AU (1) AU2008224840B2 (xx)
BR (1) BRPI0808869B1 (xx)
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NZ (1) NZ580322A (xx)
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WO2008113052A1 (en) 2008-09-18
CA2681103A1 (en) 2008-09-18
BRPI0808869B1 (pt) 2019-02-19
ZA200907136B (en) 2010-07-28
US20140025221A1 (en) 2014-01-23
US20160111874A1 (en) 2016-04-21
EP2132842A1 (en) 2009-12-16
US20100145542A1 (en) 2010-06-10
US8374729B2 (en) 2013-02-12
CN101682179B (zh) 2015-09-16
NZ580322A (en) 2012-11-30
US10698469B2 (en) 2020-06-30
CA2681103C (en) 2015-06-30
CN101682179A (zh) 2010-03-24
US20180041071A1 (en) 2018-02-08
EP2132842A4 (en) 2016-12-28
US20170317494A1 (en) 2017-11-02
US20140032003A1 (en) 2014-01-30
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AU2008224840A1 (en) 2008-09-18
US9160168B2 (en) 2015-10-13
US10050441B2 (en) 2018-08-14
US9958925B2 (en) 2018-05-01

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