REDUCING POWER CONSUMPTION IN A NETWORK BY DETECTING ELECTRICAL SIGNATURES OF APPLIANCES

• US 20100305773A1
• Filed: 06/23/2010
• Published: 12/02/2010
• Est. Priority Date: 12/26/2007
• Status: Active Grant

• Current Assignee: Greenlet Technologies Ltd.
• Original Assignee: Greenlet Technologies Ltd.
• Inventors: COHEN, Avner
• Granted Patent: US 8,290,635 B2
• Time in Patent Office: Days
• US Class Current: 700/296
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• 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: H04B 3/542 the information being in digital form

Abstract

An apparatus, system and methods system for reducing power consumption in a network including electrical appliances connected via electrical outlets to an electricity supplier and/or a system managing power consumption. The system comprises a management system and apparatuses, each comprising a measurement unit, a processing unit, an optional communications unit and a control unit, such that each apparatus is connected to an electrical outlet and is associated with an appliance or a group of appliances. Control units inject electrical signals via the associated electrical outlet to the electrical appliance. The measurement unit measures electrical parameters at the outlet, and the processing unit analyzes the electrical parameters measured in view of the electrical signal and detects the electrical signature of the associated electrical appliance therefrom. The electrical signature is utilized to characterize various characteristics of the electrical appliances and manage power consumption of the network.

Claims

1. A method comprising:

outputting a time-finite electrical signal together with an electrical power signal via an electrical power outlet onto an electrical appliance connected to the outlet;

measuring a set of electrical parameters of the time-finite electrical signal affected by the electrical appliance, at the electrical outlet, being an electrical signature of the electrical appliance, wherein the electrical signal is uniquely associated with at least one state of operation of the connected appliance; and

analyzing the electrical power signal at the outlet over time, by determining time periods in which the power signal is associated with the electrical signature, to yield at least one of the following;

an indicator that the appliance is connected and operating;

an indicator that the appliance has been shut down but remains electrically connected to the outlet;

an indicator that one or more appliances has been electrically disconnected from the outlet;

an indicator that an appliance has been disconnected from the outlet and later re-connected;

an indicator that the appliance has been replaced with a different appliance at the same outlet; and

an indicator that at least one additional appliance has been connected in parallel to the appliance, via the outlet.

2. The method of claim 1, further comprising providing data files to the electrical appliance by identifying the electrical appliance by the electric signature, to yield a reduced operation cost of the electrical appliance or reduced power during peaks.

3. The method of claim 1, further comprising applying a power consumption program for at least one electrical appliance by identifying a type and an operational stage of the at least one electrical appliance by the electric signature, to yield a reduced operation cost of the at least one electrical appliance or reduced power during certain periods, wherein the power consumption program yields a reduction in power consumption by validating that the at least one electrical appliance selected from a specified group of high power consumption electrical appliances was connected and non operative in specified peak power consumption periods.

4. The method of claim 1, further comprising associating a power consumption program selected by determining a class of an identified operational stage of the electrical appliance.

5. The method of claim 3, wherein the power consumption program comprises disconnecting electrical appliances at standby mode, as identified by their electric signature.

6. The method of claim 5, wherein the analyzing the measured electrical signal parameters comprises an analysis of real and imaginary power consumption during appliance states.

7. The method of claim 5, wherein the analyzing the measured electrical signal parameters comprises a time domain and frequency domain analyses of voltage and current measurements.

8. The method of claim 5, wherein the characterizing predefined parameters of the electrical appliance comprises comparing an impedance of the electrical appliance when it is ON and an impedance of the electrical appliance when it is OFF to a reference impedance measurement when the electrical appliance is disconnected from the electrical outlet.

9. A data processing system comprising:

a control unit arranged to output a time-finite electrical signal together with an electrical power signal via an electrical power outlet onto an electrical appliance connected to the outlet;

a measurement unit arranged to measure a set of electrical parameters of the time-finite electrical signal affected by the electrical appliance, at the electrical outlet, being an electrical signature of the electrical appliance, wherein the electrical signal is uniquely associated with at least one state of operation of the connected appliance; and

a processing unit arranged to analyze the electrical power signal at the outlet over time, by determining time periods in which the power signal is associated with the electrical signature, to yield at least one of the following;

an indicator that the appliance has been shut down but remains connected to the outlet;

an indicator that an appliance has been disconnected from the outlet and later re-connected;

an indicator that the appliance has been replaced with a different appliance at the same outlet; and

an indicator that at least one additional appliance has been connected in parallel to the appliance, via the outlet.

10. The data processing system of claim 9, wherein the control unit is further arranged to provide data files to the electrical appliance by identifying the electrical appliance by the electric signature, to yield a reduced operation cost of the electrical appliance or reduced power during certain periods.

11. The data processing system of claim 9, wherein the control unit is further arranged to generate an operational program for the electrical appliance by identifying an operational stage of the electrical appliance by the electric signature, to yield a reduced operation cost of the electrical appliance or reduced power during certain periods.

12. The data processing system of claim 11, wherein the operational program comprises disconnecting electrical appliances at standby mode, as identified by their electric signature.

13. The data processing system of claim 9, wherein the processing unit is further arranged to analyze real and imaginary power consumption during appliance states.

14. The data processing system of claim 9, wherein the processing unit is further arranged to analyze the measured electrical parameters comprises in a time domain and in a frequency domain of voltage and current measurements.

15. The data processing system of claim 9, wherein the processing unit is further arranged to compare an impedance of the electrical appliance when it is ON and an impedance of the electrical appliance when it is OFF to a reference impedance measurement when the electrical appliance is disconnected from the electrical outlet.