Electricity demand regulating system and demand adjustment executive system

• US 9,547,285 B2
• Filed: 01/28/2014
• Issued: 01/17/2017
• Est. Priority Date: 03/08/2013
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Takahashi, Hirotaka, Tomita, Yasushi, Sugamata, Ikuma
• Primary Examiner(s): Lee, Adam
• Application Number:
  US14/165,626
• Publication Number:
  US 20140257582A1
• Time in Patent Office: 1,085 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G05B 13/02 electric
• CPC Class Codes: G06Q 10/04 Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" market predictions or forecasting for commercial activities G06Q30/0202
• CPC Class Codes: G06Q 50/06 Energy or water supply

Abstract

There is provided an electricity demand regulating system which estimates a load amount of an individual equipment whose measurement information can not be acquired and improves estimation accuracy of an electricity demand amount in a power system. The electricity demand regulating system for managing electric energy used by a consumer according to an operation state of the power system includes a storage part to store measurement information of a consumer equipment, and a generation part to generate a load pattern indicating a load amount tendency from the measurement information of the equipment stored in the storage part. A load amount of an equipment whose measurement information is not stored in the storage part is estimated from the load pattern generated by the generation part, and an electricity demand amount of the consumer is obtained based on the measurement information and the estimated load amount.

Claims

1. An electricity demand regulating system for managing electric energy used by a consumer having a plurality of consumer equipments, according to an operation state of a power system, comprising:

a computer processor;

a memory;

a storage part to store measurement information of one or more first consumer equipments of one or more kinds; and

a generation part to generate a load pattern indicating a load amount tendency from the measurement information of the one or more first consumer equipments stored in the storage part,

wherein a load amount of a second consumer equipment whose measurement information is not stored in the storage part is estimated from the load pattern generated by the generation part,

wherein an electricity demand amount of the consumer is obtained based on the measurement information of the one or more first consumer equipments and the estimated load amount,

wherein the estimated load amount of the second consumer equipment is obtained by estimating a probability density of electricity demand of the second consumer equipment by using information on the kinds of the consumer equipments and the stored measurement information of the one or more first consumer equipments, and

wherein the probability density of electricity demand of the second consumer equipment is estimated by combining the probability densities of electricity demand of a plurality of the first consumer equipments which are of the same kind as the second consumer equipment and averaging the combined probability densities.

2. The electricity demand regulating system according to claim 1, wherein the load pattern generated by the generation part is generated by using a probability density.

3. The electricity demand regulating system according to claim 1, wherein the load amount of the second consumer equipment whose measurement information is not stored is estimated from the load pattern and based on a kind of each of the one or more first consumer equipments whose measurement information is stored and a kind of the second consumer equipment whose measurement information is not stored.

4. The electricity demand regulating system according to claim 1, further comprising an overload determination part to make an overload determination of an equipment of the power system, wherein

a required adjustment amount indicating an adjustment amount of electricity demand for the equipment is obtained based on the overload determination of the determination part.

5. The electricity demand regulating system according to claim 4, wherein the overload determination is performed based on a load state and a capacity of the equipment of the power system.

6. The electricity demand regulating system according to claim 4, further comprising an adjustment amount setting part to set an adjustment target value of the electricity demand by the second consumer equipment based on the required adjustment amount and the estimated load amount of the second consumer equipment.

7. The electricity demand regulating system according to claim 6, further comprising:

an adjustment target equipment selection part to select, based on the adjustment target value, at least one of the consumer equipments as an adjustment target equipment whose working state is to be changed; and

an adjustment request transmission part to send an adjustment request to the consumer to change the working state of the adjustment target equipment.

8. The electricity demand regulating system according to claim 4, further comprising

a display part to display the required adjustment amount, and

an input part to input information of the electricity demand by the second consumer equipment.

9. The electricity demand regulating system according to claim 1,

wherein the stored measurement information of the one or more first consumer equipments includes a probability density of electricity demand for each of the one or more first consumer equipments and each time the electricity demand of the one or more first consumer equipments is recorded.

10. A system comprising:

a consumer having a plurality of consumer equipments;

a display part to display a working state of the consumer equipments; and

an electricity demand regulating system for managing electric energy used by the consumer according to an operation state of a power system, the electricity demand regulating system including

a computer processor,

a memory,

a storage part to store measurement information of one or more first consumer equipments of one or more kinds, and

a generation part to generate a load pattern indicating a load amount tendency from the measurement information of the one or more first consumer equipments stored in the storage part,

wherein a load amount of a second consumer equipment whose measurement information is not stored in the storage part is estimated from the load pattern generated by the generation part, and

wherein an adjustment request is obtained based on the measurement information of the one or more first consumer equipments and the estimated load amount;

wherein the consumer includes a demand adjustment executive system connected to the electricity demand regulating system via a communication network to receive the adjustment request from the electricity demand regulating system, the demand adjustment executive system including an adjustment request executive part to control the consumer equipments in response to the adjustment request,

wherein the estimated load amount of the second consumer equipment is obtained by estimating a probability density of electricity demand of the second consumer equipment by using information on the kinds of the consumer equipments and the stored measurement information of the one or more first consumer equipments, and

wherein the probability density of electricity demand of the second consumer equipment is estimated by combining the probability densities of electricity demand of a plurality of the first consumer equipments which are of the same kind as the second consumer equipment and averaging the combined probability densities.

11. The system according to claim 10, wherein the load pattern generated by the generation part is generated by using a probability density.

12. The system according to claim 10, wherein the load amount of the second consumer equipment whose measurement information is not stored is estimated from the load pattern and based on a kind of each of the one or more first consumer equipments whose measurement information is stored and a kind of the second consumer equipment whose measurement information is not stored.

13. The system according to claim 10,

wherein the electricity demand regulating system further includes an overload determination part to make an overload determination of an equipment of the power system;

and

wherein a required adjustment amount indicating an adjustment amount of electricity demand for the equipment is obtained based on the overload determination of the determination part.

14. The system according to claim 13,

wherein the electricity demand regulating system further includes an adjustment amount setting part to set an adjustment target value of the electricity demand by the second consumer equipment based on the required adjustment amount and the estimated load amount of the second consumer equipment.

15. The system according to claim 14,

wherein the electricity demand regulating system further includes an adjustment target equipment selection part to select, based on the adjustment target value, one of the consumer equipments as an adjustment target equipment whose working state is to be changed, and an adjustment request transmission part to send an adjustment request to the consumer.

16. The system according to claim 15,

wherein the display part of the demand adjustment executive system is configured to display the adjustment target equipment which is subjected to the control and a control state including continuation time or period information of the control.

17. The system according to claim 10,

wherein the stored measurement information of the one or more first consumer equipments includes a probability density of electricity demand for each of the one or more first consumer equipments and each time the electricity demand of the one or more first consumer equipments is recorded.