Power consumption estimation device

Patent metadata

Field	Value
Publication number	US-11215651-B2
Application number	US-202017083572-A
Country	US
Kind code	B2
Filing date	Oct 29, 2020
Priority date	Jun 27, 2018
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A power consumption estimation device ( 10 ) which estimates power consumption of each of one object facility ( 100 ) or more whose operation statuses can be monitored includes: a total power vector generation unit ( 32 ) to acquire time-series data of total power consumption; a status matrix generation unit ( 34 ) to acquire time-series data of an operation parameter of the one object facility ( 100 ) or more; a reference signal generation unit ( 36 ) to generate one reference signal or more; a contribution degree estimation unit ( 38 ) to perform multiple regression analysis by taking the total power consumption as an objective variable, and the operation parameter of the one object facility ( 100 ) or more and a component value of the one reference signal or more, as explanatory variables, to thereby calculate a contribution degree of each of the one object facility ( 100 ) or more; and a breakdown calculation unit ( 42 ) to multiply the contribution degree of the object facility ( 100 ) and the operation parameter of the object facility ( 100 ), to thereby calculate power consumption of the object facility ( 100 ).

First claim

The invention claimed is:

1. A device system which estimates power consumption of each of one object facility or more which are installed in a predetermined area and whose operation statuses can be monitored, the system comprising:
an electric power meter that measures total power consumption which is power consumption of the predetermined area as a whole;
a communication interface communicatively connected to an electric flow meter; and
processing circuitry
to acquire, through communication with the electric power meter via the communication interface, time-series data of the total power consumption which is the power consumption of the predetermined area as a whole measured by the electric power meter,
to acquire time-series data of an operation parameter numeralized from the operation statuses of the one object facility or more,
to generate one reference signal or more each expressed by a predetermined basis function,
to perform multiple regression analysis by taking the acquired total power consumption as an objective variable, and the acquired operation parameter of the one object facility or more and a component value of the generated one reference signal or more, as explanatory variables, to thereby calculate a contribution degree of each of the one object facility or more to the total power consumption,
to multiply the contribution degree of the one object facility or more and the operation parameter of the one object facility or more, to thereby calculate power consumption of the one object facility or more,
to generate a command based on the calculated power consumption of the object facility or more, and to issue the command via the communication facility to the one object facility or more, the command being used to manage operation of the one object facility or more to reduce energy consumption.

2. The system according to claim 1 ,
wherein the processing circuitry calculates power consumption of each of the one object facility or more of each time period, to thereby generate a breakdown of the total power consumption of each time period.

3. The system according to claim 1 ,
wherein the basis function is a function in which a leading edge of a substantial inverted V shape or of a substantial rectangle rises only once.

4. The system according to claim 2 ,
wherein the basis function is a function in which a leading edge of a substantial inverted V shape or of a substantial rectangle rises only once.

5. The system according to claim 3 ,
wherein each reference signal is a signal in which a signal expressed by the basis function is repeated every unit time.

6. The system according to claim 4 ,
wherein each reference signal is a signal in which a signal expressed by the basis function is repeated every unit time.

7. The system according to claim 3 ,
wherein the one reference signal or more are classified into one signal group or more, and
wherein each signal group includes a plurality of reference signals whose shapes are the same and whose phases are different from each other.

8. The system according to claim 4 ,
wherein the one reference signal or more are classified into one signal group or more, and
wherein each signal group includes a plurality of reference signals whose shapes are the same and whose phases are different from each other.

9. The system according to claim 5 ,
wherein the one reference signal or more are classified into one signal group or more, and
wherein each signal group includes a plurality of reference signals whose shapes are the same and whose phases are different from each other.

10. The system according to claim 6 ,
wherein the one reference signal or more are classified into one signal group or more, and
wherein each signal group includes a plurality of reference signals whose shapes are the same and whose phases are different from each other.

11. The system according to claim 5 ,
wherein the one reference signal or more belonging to the same signal group are each expressed by a substantial inverted V-shaped function having an inverted V shape with a width W, and have phases being shifted from each other by W/2.

12. The system according to claim 6 ,
wherein the one reference signal or more belonging to the same signal group are each expressed by a substantial inverted V-shaped function having an inverted V shape with a width W, and have phases being shifted from each other by W/2.

13. The system according to claim 7 ,
wherein the one reference signal or more are classified into two signal groups or more, and
wherein a width of an inverted V shape of a reference signal belonging to one signal group is different from a width of an inverted V shape of a reference signal belonging to another signal group.

14. The system according to claim 8 ,
wherein the one reference signal or more are classified into two signal groups or more, and
wherein a width of an inverted V shape of a reference signal belonging to one signal group is different from a width of an inverted V shape of a reference signal belonging to another signal group.

15. The system according to claim 9 ,
wherein the one reference signal or more are classified into two signal groups or more, and
wherein a width of an inverted V shape of a reference signal belonging to one signal group is different from a width of an inverted V shape of a reference signal belonging to another signal group.

16. The system according to claim 10 ,
wherein the one reference signal or more are classified into two signal groups or more, and
wherein a width of an inverted V shape of a reference signal belonging to one signal group is different from a width of an inverted V shape of a reference signal belonging to another signal group.

Assignees

• Mitsubishi Electric Corp

Inventors

• Sato Fuyuki
• Otani Shinichiro
• Yoshimura Genta
• Kawano Hiroki
• Mega Toshihiro
• Nakajima Yoshinori

Classifications

• H02J3/00 Primary

  Circuit arrangements for AC mains or AC distribution networks · CPC title

• G06Q50/06

  Energy or water supply · CPC title

• G01R21/133 Primary

  by using digital technique · CPC title