Electric power measurement system, electric power measurement method, and information processing device

• US 9,513,141 B2
• Filed: 10/15/2010
• Issued: 12/06/2016
• Est. Priority Date: 12/02/2009
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Kudo, Koji, Morioka, Yukiko, Hongo, Hiroo, Sakuma, Hisato
• Primary Examiner(s): Rivera Vargas, Manuel
• Application Number:
  US13/513,584
• Publication Number:
  US 20120290232A1
• Time in Patent Office: 2,244 Days
• US Class Current: 1/1
• CPC Class Codes: G01D 2204/45 Utility meters networked together within a single building
• CPC Class Codes: G01D 4/002 Remote reading of utility meters
• CPC Class Codes: G01D 4/004 Remote reading of utility meters to a fixed location
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00026 involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/30 State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
• CPC Class Codes: Y04S 20/242 Home appliances
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading
• CPC Class Codes: Y04S 40/126 using wireless data transmission

Abstract

An electric device has an electric power measurement unit with an electric power detection element measuring consumed electric power and an information communication element transmitting the measured power. An electric power meter has an information communication element measuring and transmitting total electric power consumed indoors. An information processing unit stores the measured values in every predetermined sampling period. If a difference α of two measurement values of the electric power detection element is a finite value, the information processing unit calculates and stores both a difference β of two measurement values of the electric power meter corresponding to the two measurement values and β/α, and calibrates the amount of electric power consumed by the electric device and that is measured by the electric power detection element using a median of values of β/α obtained in a predetermined measurement period or a median of a predetermined number of values of β/α.

Claims

1. A home appliance electric power measurement system, comprising:

an electric device provided with an electric power measurement unit that has an electric power detector that constantly measures the amount of consumed electric power, a temperature measurement device that measures an ambient temperature of the electric device, and a first information communication transmitter that transmits a measurement value of said electric power detector;

an electric power meter, which has a second information communication transmitter, that constantly measures a total amount of electric power consumed indoors and transmits the measurement value;

an electric power generator provided with a generation electric power measurement unit that has a generation electric power detector that measures the amount of generated electric power and a third communication transmitter that transmits a measurement value of said generation electric power detector;

a selling electric power meter provided with a fourth information communication transmitter that measures surplus electric power of electric power generated by said electric power generator in a predetermined accuracy and transmits the surplus measurement value; and

an electric power information processing unit that stores the measurement value measured by said electric power detector and transmitted from said electric power measurement unit and the measurement value of said total amount of consumed electric power transmitted from said electric power meter in every predetermined sampling period, and that repetitively calibrates the amount of electric power that is consumed by the electric device and that is measured by the electric power detector based on a difference α

of two measurement values that is measured by the electric power detector, based on both a difference β

of two measurement values of said electric power meter corresponding to the total amount of electric power consumed indoors and based on β

/α

; and

a display device that displays the calibrated amount of the electric power that is consumed by the electric device.

2. The home appliance electric power measurement system according to claim 1, further comprising:

wherein said electric power information processing unit stores the measurement value measured by said generation electric power detector and transmitted from said generation electric power measurement unit and the measurement value of said surplus electric power transmitted from said selling electric power meter in every predetermined sampling period, when a difference γ

of two measurement values of said generation electric power detector is a finite value, calculates and stores both a difference β

that is a finite value of two measurement values of said electric power meter or two measurement values of said selling electric power meter corresponding to the two measurement values and β

/α

, and calibrates the amount of electric power that is generated by said electric power generator and that is measured by said generation electric power detector using a median of a plurality of values of β

/α

obtained in a predetermined measurement period or a median of a predetermined number of values of β

/α

.

3. The home appliance electric power measurement system according to claim 2,

wherein when a characteristic detected by said electric power detector is nonlinear, said electric power information processing unit calculates and stores a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said electric power detector and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

4. The home appliance electric power measurement system according to claim 2,

wherein said electric power information processing unit calculates and stores a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said temperature measurement device and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

5. The home appliance electric power measurement system according to claim 2,

wherein said electric power meter measures said total amount of electric power consumed indoors with an accuracy that can be converted into economic values.

6. The home appliance electric power measurement system according to claim 1,

wherein when a characteristic detected by said electric power detector is nonlinear, said electric power information processing unit calculates and stores a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said electric power detector and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

7. The home appliance electric power measurement system according to claim 6,

wherein said electric power information processing unit calculates and stores a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said temperature measurement device and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

8. The home appliance electric power measurement system according to claim 6,

wherein said electric power meter measures said total amount of electric power consumed indoors with an accuracy that can be converted into economic values.

9. The home appliance electric power measurement system according to claim 1,

wherein said electric power information processing unit calculates and stores a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said temperature measurement device and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

10. The home appliance electric power measurement system according to claim 1,

wherein said electric power meter measures said total amount of electric power consumed indoors with an accuracy that can be converted into economic values.

11. The home appliance electric power measurement system according to claim 1,

wherein said electric power information processing unit calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detection means using a median of value of β

/α

or a median of a predetermined number of values of β

/α

.

12. A home appliance electric power measurement method, comprising:

providing an electric device, that is a target whose electric power consumption is to be measured, with an electric power measurement unit that has an electric power detector that constantly measures the amount of electric power consumed by the electric device, a temperature measurement device that measures an ambient temperature of the electric device, and a first information communication transmitter that transmits a measurement value of said electric power detector;

providing an electric power meter that constantly measures a total amount of electric power consumed indoors with a second information communication transmitter that transmits the measurement value;

providing an electric power generator provided with a generation electric power measurement unit that has a generation electric power detector that measures the amount of generated electric power and a third information communication transmitter that transmits a measurement value of said generation electric power detector;

providing a selling electric power meter provided with a fourth information communication transmitter that measures surplus electric power of electric power generated by said electric power generator in a predetermined accuracy and transmits the measurement value; and

causing a computer to store the measurement value measured by said electric power detector and transmitted from said electric power measurement unit and the measurement value of said total amount of consumed electric power transmitted from said electric power meter in every predetermined sampling period, and that repetitively calibrates the amount of electric power that is consumed by the electric device and that is measured by the electric power detector based on a difference α

of two measurement values that is measured by the electric power detector, based on both a difference β

of two measurement values of said electric power meter corresponding to the total amount of electric power consumed indoors and based on β

/α

; and

displaying the calibrated amount of the electric power that is consumed by the electric device.

13. The home appliance electric power measurement method according to claim 12, further comprising:

causing said computer to store the measurement value measured by said generation electric power detector and transmitted from said generation electric power measurement unit and the measurement value of said amount of surplus electric power transmitted from said selling electric power meter in every predetermined sampling period, when a difference γ

of two measurement values of said generation electric power detector is a finite value, calculate and store both a difference β

that is a finite value of two measurement values of said electric power meter or two measurement values of said selling electric power meter corresponding to the two measurement values and β

/α

, and calibrate the amount of electric power that is generated by said electric power generator and that is measured by said generation electric power detector using a median of a plurality of values of β

/α

obtained in a predetermined measurement period or a median of a predetermined number of values of β

/α

.

14. The home appliance electric power measurement method according to claim 12, further comprising:

when a characteristic detected by said electric power detector is nonlinear, causing said computer to calculate and store a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said electric power detector and then calibrate the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

15. The home appliance electric power measurement method according to claim 12, further comprising:

causing said computer to calculate and store a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said temperature measurement device and then calibrate the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

16. The home appliance electric power measurement method according to claim 12,

wherein said electric power meter measures said total amount of electric power consumed indoors with an accuracy that can be converted into economic values.

17. The home appliance electric power measurement method according to claim 12,

wherein said electric power information processing unit calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detection means using a median of value of β

/α

or a median of a predetermined number of values of β

/α

.

18. An information processing device that calibrates a home appliance electric power measurement value transmitted from an electric device having an electric power measurement unit that includes an electric power detector that measures the amount of consumed electric power, a temperature measurement device that measures an ambient temperature of the electric device, and a first information communication transmitter that transmits the measurement value of said electric power detector, the information processing device comprising:

an information processing device communication transmitter that receives the measurement value measured by said electric power detector and transmitted from said electric power measurement unit and the measurement value of the total amount of electric power consumed indoors, measured in a predetermined accuracy by an electric power meter, and transmitted therefrom;

a processing unit that obtains the measurement value measured by said electric power detector and the measurement value measured by said electric power meter in every predetermined sampling period and that repetitively calibrates the amount of electric power that is consumed by the electric device and that is measured by the electric power detector based on a difference α

of two measurement values that is measured by the electric power detector, based on both a difference β

of two measurement values of said electric power meter corresponding to the total amount of electric power consumed indoors and based on β

/α

;

a storage unit that stores both the measurement value measured by said electric power detector and obtained in every said sampling period and the measurement value of said electric power meter and also stores said value of β

/α

; and

a display device that displays the calibrated amount of the electric power that is consumed by the electric device,

wherein said information communication device receives a measurement value of the amount of electric power generated by an electric power generator from a generation electric power measurement unit that includes a generation electric power detector that measures the amount of generated electric power and a second information communication transmitter that transmits the measurement value of said electric power detector, and a measurement value of the amount of surplus electric power generated by said electric power generator from a selling electric power meter provided with a third information communication transmitter that measures the amount of surplus electric power according to a predetermined accuracy level.

19. The information processing device according to claim 18,

wherein said processing unit obtains the measurement value measured by said generation electric power detector and transmitted from said generation electric power measurement unit and the measurement value of said amount of surplus electric power transmitted from said selling electric power meter in every predetermined sampling period, when a difference γ

of two measurement values of said generation electric power detector is a finite value, calculates both a difference β

that is a finite value of two measurement values of said electric power meter or two measurement values of said selling electric power meter corresponding to the two measurement values and β

/α

, and calibrates the amount of electric power that is generated by said electric power generator and that is measured by said generation electric power detector using a median of a plurality of values of β

/α

obtained in a predetermined measurement period or a median of a predetermined number of values of β

/α

, and

wherein said storage unit stores both the measurement value measured by said generation electric power detector and obtained in every sampling period and the measurement value of said surplus electric power transmitted from said selling electric power meter and also stores said value of β

/α

.

20. The information processing device according to claim 18,

wherein when a characteristic detected by said electric power detector is nonlinear, said processing unit calculates and stores a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said electric power detection means and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

21. The information processing device according to claim 18,

wherein said processing unit calculates and stores a median of said plurality of values of β

/α

in each of predetermined measurement electric power ranges of said temperature measurement device and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β

/α

obtained in each of said measurement electric power ranges.

22. The information processing device according to claim 18,

wherein said electric power meter measures said total amount of electric power consumed indoors with an accuracy that can be converted into economic values.

23. The information processing device according to claim 18,

wherein said electric power information processing unit calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detection means using a median of value of β

/α

or a median of a predetermined number of values of β

/α

.