Power adjustment device, power adjustment method, power adjustment system, power storage device, server, program

Patent metadata

Field	Value
Publication number	US-10338622-B2
Application number	US-201414901007-A
Country	US
Kind code	B2
Filing date	Jun 19, 2014
Priority date	Jun 27, 2013
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

A power adjustment device supplies power received from a power grid and power of a storage battery to an electric load in a consumer's facility. Power adjustment device includes a prediction portion, a planning portion, and a controller. Prediction portion obtains a prediction value of demand power that is power to be consumed in the electric load in a planning period, the planning period being a period in which the storage battery is charged and discharges. Planning portion determines a control content of charging of and discharging by the storage battery in the planning period depending on the prediction value of the demand power to minimize any one of an amount of power to be received from the power grid, a compensation for power to be received from the power grid, and an emission amount of carbon dioxide. Controller controls the power conditioner in accordance with the control content.

First claim

The invention claimed is:

1. A power adjustment device configured to supply power received from a power grid and power of a power storage apparatus to an electric load in a consumer's facility, the power adjustment device comprising:
a prediction portion configured to obtain a prediction value of demand power that is power to be consumed in the electric load in a planning period, the planning period being a period in which the power storage apparatus is charged and discharged;
a planning portion configured to determine a control content of charging of and discharging by the power storage apparatus in the planning period depending on the prediction value of the demand power under a condition that any one of an amount of power to be received from the power grid, a compensation for power to be received from the power grid, and an emission amount of carbon dioxide is minimized;
a controller configured to control the power storage apparatus in accordance with the control content; and
a verification portion configured to estimate a prediction error of the prediction value obtained by the prediction portion,
the planning portion being configured to set the planning period based on:
a maximum value of the demand power in which the prediction error is considered, and
a minimum value of generated power that is generated by a solar power generation apparatus installed in the consumer's facility in which the prediction error is considered.

2. The power adjustment device according to claim 1 , wherein in a case where two or more unit prices are set for two or more periods as the compensation for power to be received from the power grid, the planning period is set to start at a starting time of a period in which a unit price is the lowest.

3. The power adjustment device according to claim 2 , wherein the planning period is set to include two or more periods such that unit prices in the two or more periods, of the two or more unit prices, are respectively different.

4. The power adjustment device according to claim 1 ,
wherein
the prediction portion is configured to obtain a prediction value of generated power that is power generated by the solar power generation apparatus in the planning period, and
the planning period is set to include a period in which the prediction value of the generated power is more than a predetermined threshold and a period in which the prediction value of the generated power is less than the predetermined threshold.

5. The power adjustment device according to claim 1 ,
wherein the power storage apparatus can be charged with surplus power that is obtained by subtracting the demand power from generated power that is power generated by the solar power generation apparatus,
the prediction portion is configured to obtain a prediction value of the generated power in the planning period, and obtain a prediction value of the surplus power from the prediction value of the generated power and the prediction value of the demand power,
the planning period is set to include a period in which the power storage apparatus can be charged with the surplus power that is predicted, and a period in which the power storage apparatus cannot be charged with the surplus power that is predicted.

6. The power adjustment device according to claim 1 , wherein the prediction portion is configured to determine two or more planning periods in which part of one of the two or more planning periods overlaps with part of another of the two or more planning periods, and to obtain a prediction value for each of the two or more planning periods.

7. The power adjustment device according to claim 1 , wherein the planning period is set as a period including multiple calculation time periods, each of which serves as a unit period, and
the planning portion is configured to determine the control content such that the power storage apparatus is charged or discharges for each of the calculation time periods.

8. A power adjustment method for supplying power received from a power grid and power of a power storage apparatus to an electric load in a consumer's facility, the power adjustment method comprising:
obtaining, with the prediction portion, a prediction value of demand power that is power to be consumed in the electric load in a planning period, the planning period being a period in which the power storage apparatus is charged and discharged;
determining, with a planning portion, a control content of charging of and discharging by the power storage apparatus in the planning period depending on the prediction value of the demand power under a condition that any one of an amount of power to be received from the power grid, a compensation for power to be received from the power grid, and an emission amount of carbon dioxide is minimized;
controlling, with a controller, the power storage apparatus in accordance with the control content;
estimating, with a verification portion, a prediction error of the prediction value obtained by the prediction portion; and
setting, with the planning portion, the planning period based on:
a maximum value of the demand power in which the prediction error is considered, and
a minimum value of generated power that is generated by a solar power generation apparatus installed in the consumer's facility in which the prediction error is considered.

9. A power adjustment system comprising:
the power adjustment device according to claim 1 ; and
the power storage apparatus.

10. A power storage device comprising:
the power adjustment device according to claim 1 ;
the power storage apparatus; and
a housing that houses the power adjustment device and the power storage apparatus.

11. A server configured to communicate with a control device configured to control a power storage apparatus such that power received from a power grid and power of the power storage apparatus is supplied to an electric load in a consumer's facility, the server comprising:
a prediction portion configured to obtain a prediction value of demand power that is power to be consumed in the electric load in a planning period, the planning period being a period in which the power storage apparatus is charged and discharged;
a planning portion configured to determine a control content of charging of and discharging by the power storage apparatus in the planning period depending on the prediction value of the demand power under a condition that any one of an amount of power to be received from the power grid, a compensation for power to be received from the power grid, and an emission amount of carbon dioxide is minimized;
a communication portion configured to notify the control device of the control content such that the power storage apparatus is caused to operate in accordance with the control content; and
a verification portion configured to estimate a prediction error of the prediction value obtained by the prediction portion,
the planning portion being configured to set the planning period based on:
a maximum value of the demand power in which the prediction error is considered, and
a minimum value of generated power that is generated by a solar power generation apparatus installed in the consumer's facility in which the prediction error is considered.

Assignees

• Panasonic Corp

Inventors

• Nakasone Haruka

Classifications

• H02J7/35

  with light sensitive cells · CPC title

• H02J3/381

  Dispersed generators · CPC title

• Y02E70/30

  Systems combining energy storage with energy generation of non-fossil origin · CPC title

• G05F1/66 Primary

  Regulating electric power · CPC title

• G05B15/02

  electric · CPC title