# US 8,543,248 B2 · System for managing energy at loads

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- Number: US 8,543,248 B2
- Document ID: US8543248B2
- Status: Granted
- Kind: B2
- Application number: 12/694,663
- Filed: 2010-01-27
- Published: 2010-09-02
- Granted: 2013-09-24
- Earliest claimed: 2009-03-02
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Yutaka Iino; Yasuhiro Taguchi
- Inventors: Yutaka Iino; Yasuhiro Taguchi
- Web page: https://patentgrep.com/patent/US8543248B2

## CPC

- G06Q 30/02: Marketing; Price estimation or determination; Fundraising
- G06Q 10/06: Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- Y02P 90/84: Greenhouse gas [GHG] management systems
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

According to one embodiment, an energy management system is provided, which has the DSM function of controlling energy loads. The system has a database and a load adjustment range prediction unit. The unit predicts a load adjustment range by using the history data stored in the database and outputs the load adjustment range thus predicted.

## Claims

### Claim 1

An energy management system comprising:
a database configured to store history data about load adjustment;
a demand prediction unit configured to predict a demand at a load to which energy is supplied;
a load adjustment range prediction unit configured to calculate a load adjustment range by using the history data stored in the database, the load adjustment range being defined by lower limit and upper limit of load adjustment limits for the predicted demand, the lower limit being based on the demand and load power decrease, the upper limit being based on the demand and load power increase; and
a display unit configured to display the demand predicted by the demand prediction unit and the load adjustment range calculated by the load adjustment range prediction unit.

### Claim 2 (depends on 1)

The system according to claim 1, wherein the display unit displays the load adjustment range calculated by the load adjustment range prediction unit.

### Claim 3 (depends on 1)

The system according to claim 1, further comprising a load adjustment prediction optimization unit configured to perform an optimization calculation using the history data stored in the database, in consideration of at least one indices including a cost coefficient, an adjustment range restriction condition, a priority order of load adjustment, and a adjustment dissatisfaction degree.

### Claim 4 (depends on 1)

The system according to claim 1, wherein the load adjustment range prediction unit calculates the load adjustment range for each load, in order to adjust the load by performing any one of, or any combination of, shifting of the load use timing, shortening or lengthening of the load use period, increasing or decreasing of a load factor, moderating changes at the time of connecting or disconnecting the load, coordinating operation of the loads, interrupting of load stopping or starting, and forcing load stopping or starting.

### Claim 5 (depends on 1)

The system according to claim 1, further comprising a load adjustment prediction optimization unit configured to perform an optimization calculation using the history data stored in the database, in consideration of at least one indices including a cost coefficient, an adjustment range restriction condition, a priority order of load adjustment and a adjustment dissatisfaction degree, the load adjustment prediction optimization unit performing the optimization calculation on each load adjusting means.

### Claim 6 (depends on 4)

The system according to claim 4, further comprising a database registration unit configured to register the load adjustment range predicted by the load adjustment range prediction unit, as the history data, in the database.

### Claim 7 (depends on 1)

The system according to claim 1, further comprising a unit configured to correct the load adjustment range predicted by the load adjustment range prediction unit, in accordance with external factors including weather, season, use mode of the load.

### Claim 8 (depends on 1)

The system according to claim 1, which is applied to a microgrid that has the function of performing demand-side management.

### Claim 9

An energy management method for use in an energy management system having a database configured to store history data about load adjustment and a demand prediction unit configured to predict a demand at a load to which energy is supplied, the method comprising:
calculating a load adjustment range by using the history data stored in the database, the load adjustment range being defined by lower limit and upper limit of load adjustment limits for the predicted demand, the lower limit being based on the demand and load power decrease, the upper limit being based on the demand and load power increase; and
displaying the demand predicted by the demand prediction unit and the calculated load adjustment range.