System and method for monitoring electrical power usage in an electrical power infrastructure of a building

Patent metadata

Field	Value
Publication number	US-10345423-B2
Application number	US-201715855856-A
Country	US
Kind code	B2
Filing date	Dec 27, 2017
Priority date	Jul 2, 2010
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A system for monitoring electrical power usage in an electrical power infrastructure of a building. The system can include: a power consumption measurement device configured to be coupled to a first surface of the circuit breaker box, the circuit breaker box containing at least part of the electrical supply conductors for the electrical power infrastructure, the power consumption measurement device comprising one or more electrical current sensors; a first calibration device configured to be electrically coupled to the electrical power infrastructure, the first calibration device comprising one or more first calibration loads; and a calibration module configured to be performed using one or more processors and further configured to at least partially calibrate the power consumption measurement device using a Kalman filter and data obtained from the one or more electrical current sensors of the power consumption measurement device. The power consumption measurement device is configured to obtain at least part of the data while at least one of the one or more first calibration loads is electrically coupled to the electrical power infrastructure and while the power consumption measurement device is coupled to the first surface of the circuit breaker box. Other embodiments are provided.

First claim

What is claimed is:

1. A system for monitoring electrical power usage in an electrical power infrastructure of a building, the building comprising a circuit breaker box and electrical supply conductors of the electrical power infrastructure of the building, the system comprising:
a power consumption measurement device configured to be coupled to a first surface of the circuit breaker box overlying at least part of the electrical supply conductors of the electrical power infrastructure, the power consumption measurement device comprising one or more electrical current sensors to sense a time-varying magnetic field produced by the electrical supply conductors;
a first calibration device configured to be electrically coupled to the electrical power infrastructure, the first calibration device comprising one or more first calibration loads, the one or more first calibration loads configured to be removably coupled to a first branch of the electrical power infrastructure; and
a calibration module configured to be performed using one or more processors and further configured to at least partially calibrate the power consumption measurement device by applying a Kalman filter using current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to estimate a mean of the current sensor measurements as power consumption in the electrical power infrastructure changes as a function of the electrical power usage,
wherein:
the power consumption measurement device is configured to obtain at least part of the current sensor measurements while at least one of the one or more first calibration loads is electrically coupled to the electrical power infrastructure and while the power consumption measurement device is coupled to the first surface of the circuit breaker box.

2. The system of claim 1 , wherein:
the calibration module is further configured to apply the Kalman filter using the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to determine one or more first calibration coefficients for the power consumption measurement device.

3. The system of claim 2 , further comprising:
a processing module configured to be performed using the one or more processors and further configured to use the one or more first calibration coefficients and the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to determine an amount of electrical power being used by one or more loads electrically coupled to the electrical power infrastructure.

4. The system of claim 3 , wherein:
the calibration module is further configured to re-apply the Kalman filter using the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to re-determine one or more first calibration coefficients for the power consumption measurement device at predetermined time intervals.

5. The system of claim 4 , further comprising:
a computational unit comprising the calibration module, the processing module, and the one or more processors.

6. The system of claim 5 , wherein:
the processing module is further configured to use the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to at least partially determine an amount of current being used by the electrical power infrastructure.

7. The system of claim 6 , further comprising:
a voltage measurement module configured to measure a voltage across the electrical power infrastructure.

8. The system of claim 4 , further comprising:
a voltage measurement module configured to measure a voltage across the electrical power infrastructure.

9. The system of claim 8 , further comprising:
a computational unit comprising the calibration module, the processing module, the voltage measurement module, and the one or more processors.

10. The system of claim 9 , wherein:
the processing module is further configured to use the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to at least partially determine an amount of current being used by the electrical power infrastructure.

11. The system of claim 3 , wherein:
the processing module is further configured to use the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to at least partially determine an amount of current being used by the electrical power infrastructure.

12. The system of claim 11 , further comprising:
a voltage measurement module configured to measure a voltage across the electrical power infrastructure.

13. The system of claim 11 , wherein:
the calibration module is further configured to re-apply the Kalman filter using the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to determine one or more first calibration coefficients for the power consumption measurement device at predetermined time intervals.

14. The system of claim 13 , further comprising:
a voltage measurement module configured to measure a voltage across the electrical power infrastructure.

15. The system of claim 2 , further comprising:
a processing module configured to be performed using the one or more processors and further configured to use the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to at least partially determine an amount of current being used by the electrical power infrastructure.

16. The system of claim 15 , further comprising:
a voltage measurement module configured to measure a voltage across the electrical power infrastructure.

17. The system of claim 2 , wherein:
the calibration module is further configured to re-apply the Kalman filter using the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to determine one or more first calibration coefficients for the power consumption measurement device at predetermined time intervals.

18. The system of claim 17 , further comprising:
a voltage measurement module configured to measure a voltage across the electrical power infrastructure.

19. The system of claim 1 , further comprising:
a processing module configured to be performed using the one or more processors and further configured to use the current sensor measurements measured by the one or more electrical current sensors of the power consumption measurement device to at least partially determine an amount of current being used by the electrical power infrastructure.

20. The system of claim 1 , further comprising:
a voltage measurement module configured to measure a voltage across the electrical power infrastructure.

Assignees

• Belkin International Inc

Inventors

• Maguire Yael
• Yogeeswaran Karthik
• Patel Shwetak N
• Reynolds Matthew S

Classifications

• G01R22/06

  by electronic methods · CPC title

• G01R35/04 Primary

  of instruments for measuring time integral of power or current · CPC title

• G01R21/06

  by measuring current and voltage (G01R21/08 - G01R21/133 take precedence) · CPC title

• G01R15/207

  Constructional details independent of the type of device used · CPC title

• G01R35/005

  Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references (G01R33/0035, G01R35/002 take precedence) · CPC title