Storage battery management device, storage battery, method of managing storage battery, and storage medium

• US 10,074,987 B2
• Filed: 07/07/2014
• Issued: 09/11/2018
• Est. Priority Date: 09/27/2013
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Fukubayashi, Yuichiro, Kondo, Yasuaki
• Primary Examiner(s): Siek, Vuthe
• Application Number:
  US15/021,414
• Publication Number:
  US 20160226250A1
• Time in Patent Office: 1,527 Days
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 3/004 Generation forecast, e.g. methods or systems for forecasting future energy generation
• CPC Class Codes: H02J 3/008 involving trading of energy or energy transmission rights
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
• CPC Class Codes: Y04S 50/10 Energy trading, including energy flowing from end-user application to grid

Abstract

Provided is a storage battery management device (10) including a price information acquisition unit (11) that acquires power purchasing price information indicating a power purchasing price for each time period of power supplied from an electric power system, a remaining discharge capacity information acquisition unit (12) that acquires remaining discharge capacity information indicating the amount of power that can be discharged to a load from a storage battery, and a discharging schedule generation unit (13) that generates a discharging schedule in which an upper limit of the amount of power discharged from the storage battery is determined for each of a plurality of discharging time periods divided for each unit time, using the power purchasing price information and the remaining discharge capacity information.

Claims

1. A storage battery management device for managing a storage battery, comprising:

a memory storing a set of instructions; and

a processor configured to execute the set of instructions to;

determine an upper limit of an amount of power discharged from the storage battery for each of discharging time periods divided for each unit time, based on;

remaining discharge capacity information indicating an amount of power that can be supplied to a load from the storage battery, and

power purchasing price information indicating a power purchasing price for each discharging time period,

wherein the upper limit is determined so that an upper limit in a discharging time period having a relatively high power purchasing price is larger than an upper limit in a discharging time period having a relatively low power purchasing price.

2. The storage battery management device according to claim 1,

wherein priority ranks are given to the discharging time periods so that a priority rank of the discharging time period having a high power purchasing price is high, and the upper limit is determined so that an upper limit for a first discharging time period is set to be equal to or larger than an upper limit for a second discharging time period having a priority rank lower than that of the first discharging time period.

3. The storage battery management device according to claim 1,

wherein either of a maximum power that can be discharged from the storage battery and a predetermined value less than the maximum power is determined as the upper limit for each of the discharging time periods.

4. The storage battery management device according to claim 1,

wherein either of a maximum amount of power that can be discharged from the storage battery per unit time and a predetermined value smaller than the maximum amount of power is determined as the upper limit for each of the discharging time periods.

5. The storage battery management device according to claim 1,

wherein the upper limit is determined by further using predicted demand information indicating predicted power demand of the load.

6. The storage battery management device according to claim 5,

wherein a value equal to or larger than a value of the predicted power demand in the discharging time period is determined as the upper limit.

7. The storage battery management device according to claim 1,

wherein updated remaining discharge capacity information indicating an amount of power that can be supplied to the load from the storage battery at a predetermined timing is acquired, and the upper limit for a discharging time period after the predetermined timing is updated by further using the updated remaining discharge capacity information.

8. The storage battery management device according to claim 1,

wherein a chargeable time period in which the storage battery acquires power from an electric power system and charges the power is determined, and a time period except for the chargeable time period is determined as the discharging time period.

9. A storage battery that discharges power in accordance with the upper limit determined by the storage battery management device according to claim 1.

10. A method of managing a storage battery, the method comprising:

determining an upper limit of an amount of power discharged from the storage battery for each of discharging time periods divided for each unit time, on the basis of;

remaining discharge capacity information indicating an amount of power that can be supplied to a load from the storage battery, and

power purchasing price information indicating a power purchasing price for each discharging time period,

wherein the upper limit is determined so that an upper limit in a discharging time period having a relatively high power purchasing price is larger than an upper limit in a discharging time period having a relatively low power purchasing price.

11. A non-transitory storage medium storing a program which when executed, causes a processor of a computer to perform a method for managing a storage battery, the method comprising:

determining an upper limit of an amount of power discharged from the storage battery for each of discharging time periods divided for each unit time, on the basis of;

remaining discharge capacity information indicating an amount of power that can be supplied to a load from the storage battery, and

power purchasing price information indicating a power purchasing price for each discharging time period,

wherein the upper limit is determined so that an upper limit in a discharging time period having a relatively high power purchasing price is larger than an upper limit in a discharging time period having a relatively low power purchasing price.

12. A storage battery management device for managing a storage battery, comprising:

a memory storing a set of instructions; and

a processor configured to execute the set of instructions to;

determine an upper limit of an amount of power discharged from the storage battery for each of discharging time periods divided for each unit time, on the basis of;

remaining discharge capacity information indicating an amount of power that can be supplied to a load from the storage battery, and

power purchasing price information indicating a power purchasing price for each discharging time period,

wherein a plurality of the discharging time periods are divided into a first group in which discharging time periods having a relatively high power purchasing price are collected and a second group in which discharging time periods having a relatively low power purchasing price are collected,

wherein a maximum amount of power that can be discharged in each discharging time period is specified on the basis of the upper limit of the amount of power, and

wherein a discharging schedule is generated so that a sum of a first total which is a total of maximum amounts of power in respective discharging time periods included in the first group and a second total which is a total of maximum amounts of power in respective discharging time periods included in the second group, which are temporally prior to at least one discharging time period included in the first group, does not exceed a predetermined amount of power which is determined on the basis of the remaining discharge capacity information.

16. The storage battery management device according to claim 12,

wherein the discharging schedule is generated so that a sum of a third total which is a total of maximum amounts of power in respective discharging time periods included in the second group, which are temporally after all discharging time periods included in the first group, the first total, and the second total is set to be equal to or larger than the predetermined amount of power which is determined on the basis of the remaining discharge capacity information.

13. A storage battery management device for managing a storage battery, comprising:

a memory storing a set of instructions; and

a processor configured to execute the set of instructions to;

determine an upper limit of an amount of power discharged from the storage battery for each of discharging time periods divided for each unit time, on the basis of;

remaining discharge capacity information indicating an amount of power that can be supplied to a load from the storage battery,

power purchasing price information indicating a power purchasing price for each discharging time period,

predicted power generation information indicating a predicted power generation amount for each discharging time period of a power generation device that supplies power to the load or the storage battery, and

power selling price information indicating a selling price of power which is generated by the power generation device,

wherein the upper limit is determined on a premise that power generated by the power generation device is supplied to the load or the storage battery in a time period having a selling price of power equal to or lower than the power purchasing price and the power generated by the power generation device is not supplied to the load or the storage battery in a time period having a selling price of power higher than the power purchasing price.

14. A storage battery management device for managing a storage battery, comprising:

a memory storing a set of instructions; and

a processor configured to execute the set of instructions to;

determine an upper limit of an amount of power discharged from the storage battery for each of discharging time periods divided for each unit time, on the basis of;

remaining discharge capacity information indicating an amount of power that can be supplied to a load from the storage battery, and

privilege information indicating a privilege for each discharging time period according to an amount of power supplied from an electric power system,

wherein the privilege information is information indicating that a predetermined privilege is obtained when an amount of power supplied from the electric power system in a first time period is smaller than a predetermined value, and

wherein an upper limit which is larger than upper limits for the other discharging time periods is determined for a discharging time period included in the first time period.

15. A storage battery management device for managing a storage battery, comprising:

a memory storing a set of instructions; and

a processor configured to execute the set of instructions to;

determine an upper limit of an amount of power discharged from the storage battery for each of discharging time periods divided for each unit time, on the basis of remaining discharge capacity information indicating an amount of power that can be supplied to a load from the storage battery,

wherein a maximum amount of power that can be discharged in each discharging time period which is determined on the basis of the upper limit, is an amount of power which is obtained by subtracting a predetermined amount from an amount of power that can be supplied to the load from the storage battery.