Power equalization device

Patent metadata

Field	Value
Publication number	US-9715229-B2
Application number	US-201214371774-A
Country	US
Kind code	B2
Filing date	Feb 14, 2012
Priority date	Feb 14, 2012
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

Provided is a power equalization device capable of equalizing the power supplied to a manufacturing line from outside even in the case where a plurality of materials are simultaneously processed at different locations. For this purpose, the power equalization device has a power demand prediction function of predicting power consumption expected when a plurality of materials are simultaneously processed at different locations of a manufacturing plant or manufacturing line of a metallic material, and a power equalization control function of causing a power storage device to make the manufacturing plant or the manufacturing line perform discharging in the case where power consumption predicted by the power demand prediction function exceeds a prescribed value, so that power supplied to the manufacturing plant or the manufacturing line from an external power system becomes not more than the prescribed value.

First claim

The invention claimed is:

1. A power equalization device, comprising:
a power demand prediction function of predicting power consumption expected when a plurality of materials are processed at different locations of a manufacturing plant or manufacturing line of a metallic material;
a power equalization control function of causing a power storage device to make the manufacturing plant or the manufacturing line perform discharging in the case where power consumption predicted by the power demand prediction function exceeds a prescribed value, so that power supplied to the manufacturing plant or the manufacturing line from an external power system becomes not more than the prescribed value;
an operation schedule prediction function of predicting location and time for manufacturing each of rolled materials in the manufacturing plant or the manufacturing line; and
an individual-product power consumption prediction function of predicting power consumption expected when each of the rolled materials is manufactured at the location,
wherein on the basis of the location of each of the rolled materials at a point of time, the power demand prediction function calculates power consumption expected when each of the rolled materials is manufactured at the point of time, and regards an integrated value of a calculated value of power consumption expected when each of the rolled materials is manufactured as a predicted value of power consumption of the manufacturing plant or the manufacturing line at the point of time, and
wherein the operation schedule prediction function makes a comparison between a predicted value and an actual value of location and time expected or obtained when a rolled material is manufactured in the manufacturing plant or the manufacturing line and improves a prediction accuracy of location and time expected when each of the rolled materials is manufactured.

2. The power equalization device according to claim 1 , wherein the power equalization control function causes the power storage device to perform charging by receiving power supply from the external power system in the case where the power consumption predicted by the power demand prediction function does not exceed the prescribed value.

3. The power equalization device according to claim 1 , wherein the power equalization control function adjusts the manufacturing timing of a product in the manufacturing plant or the manufacturing line in the case where the power storage device cannot be used, so that power supplied to the manufacturing plant or the manufacturing line from the external power system becomes not more than the prescribed value.

4. The power equalization device according to claim 3 , wherein in the case where predicted values of power consumption of a plurality of manufacturing plants or manufacturing lines exceed the prescribed value, the power equalization control function adjusts product manufacturing timing in the plurality of manufacturing plants or manufacturing lines so that power supplied to the plurality of manufacturing plants or manufacturing lines from the external power system becomes not more than the prescribed value.

5. The power equalization device according to claim 1 ,
wherein the power storage device comprises a plurality of devices with different responses of discharging and
wherein in causing the power storage device to perform discharging to the manufacturing plant or the manufacturing line, the power equalization control function changes an order of devices which are caused to perform discharging according to the rate of change in power demand.

6. The power equalization device according to claim 1 , wherein the power demand prediction function makes a comparison between a predicted value and an actual value of the power consumption of the manufacturing plant or the manufacturing line and improves the prediction accuracy of the power consumption of the manufacturing plant or the manufacturing line.

7. The power equalization device according to claim 1 , wherein on the basis of set values of the manufacturing plant or the manufacturing line computed so as to meet product specifications given when each of the rolled materials was manufactured in the manufacturing plant or the manufacturing line, the individual-product power consumption prediction function predicts power consumption expected when each of the rolled materials is manufactured at the location.

8. The power equalization device according to claim 1 , wherein on the basis of an actual value of power consumption obtained when a rolled material was manufactured in the manufacturing plant or the manufacturing line, the individual-product power consumption prediction function predicts power consumption expected when each of the rolled materials is manufactured at the location.

9. The power equalization device according to claim 1 , wherein the individual-product power consumption prediction function makes a comparison between a predicted value and an actual value of power consumption expected or obtained when a rolled material is manufactured at the location in the manufacturing plant or the manufacturing line, and improves the prediction accuracy of power consumption expected when each of the rolled materials is manufactured at the location.

10. The power equalization device according to claim 1 , wherein in the case where an actual value of power supplied to the manufacturing plant or the manufacturing line from the external power system exceeds a threshold value set at a value not more than the prescribed value, the power equalization control function causes the power storage device to perform discharging to the manufacturing plant or the manufacturing line.

11. A power equalization device, comprising:
processing circuitry configured to
predict power consumption expected when a plurality of materials are processed at different locations of a manufacturing plant or manufacturing line of a metallic material,

cause a power storage device to make the manufacturing plant or the manufacturing line perform discharging in the case where predicted power consumption exceeds a prescribed value, so that power supplied to the manufacturing plant or the manufacturing line from an external power system does not become more than the prescribed value,
predict location and time for manufacturing each of rolled materials in the manufacturing plant or the manufacturing line,
predict power consumption expected when each of the rolled materials is manufactured at the location,
calculate, on the basis of the location of each of the rolled materials at a point of time, power consumption expected when each of the rolled materials is manufactured at the point of time, and regard an integrated value of a calculated value of power consumption expected when each of the rolled materials is manufactured as a predicted value of power consumption of the manufacturing plant or the manufacturing line at the point of time, and
make a comparison between a predicted value and an actual value of location and time expected or obtained when a rolled material is manufactured in the manufacturing plant or the manufacturing line and improves a prediction accuracy of location and time expected when each of the rolled materials is manufactured.

12. The power equalization device according to claim 11 , wherein the processing circuitry adjusts the manufacturing timing of a product in the manufacturing plant or the manufacturing line in the case where the power storage device cannot be used, so that power supplied to the manufacturing plant or the manufacturing line from the external power system does not become more than the prescribed value.

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Assignees

• Imanari Hiroyuki
• Toshiba Mitsubishi-Electric Ind Systems Corp

Inventors

• Imanari Hiroyuki

Classifications

• H02J3/003 Primary

  Load forecast, e.g. methods or systems for forecasting future load demand · CPC title

• G05B2219/2639

  Energy management, use maximum of cheap power, keep peak load low · CPC title

• Y02E60/16

  Mechanical energy storage, e.g. flywheels or pressurised fluids · CPC title

• G05B15/02

  electric · CPC title

• G05B13/026

  using a predictor · CPC title