Battery control device, battery control support device, battery control system, battery control method, battery control support method, and recording medium

• US 10,365,675 B2
• Filed: 02/06/2014
• Issued: 07/30/2019
• Est. Priority Date: 02/08/2013
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Kudo, Koji, Sakuma, Hisato, Yano, Hitoshi, Aoki, Kazuhiko, Yanagita, Yoshiho, Iwasaki, Yuma, Hashimoto, Ryo, Saneyoshi, Eisuke, Toizumi, Takahiro
• Primary Examiner(s): Kasenge, Charles R
• Application Number:
  US14/375,870
• Publication Number:
  US 20160274607A1
• Time in Patent Office: 2,000 Days
• CPC Class Codes: G05F 1/625 wherein it is irrelevant whether the variable actually regulated is ac or dc
• CPC Class Codes: G05F 1/66 Regulating electric power
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 2300/20 The dispersed energy generation being of renewable origin
• CPC Class Codes: H02J 2300/22 The renewable source being solar energy
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin
• CPC Class Codes: Y04S 10/123 the energy generation units being or involving renewable energy sources
• CPC Class Codes: Y04S 10/14 Energy storage units
• CPC Class Codes: Y04S 10/30 State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge

Abstract

A battery control device controlling an operation of a battery connected to a power system includes detection means that detects battery-related information that shows a state of the battery, or a voltage of an interconnection point of the power system and the battery, first communication means that transmits a detection result of the detection means to an external device, and receives operation control information to control the operation of the battery from the external device, and control means that controls the operation of the battery, based on a state of the power system and the operation control information received by the first communication means.

Claims

1. A battery control device controlling an operation of a battery that is connected to a utility grid, the battery control device comprising:

a first detection unit that detects state information that shows a state of the battery;

a second detection unit that detects a state of the utility grid;

a first communication unit that transmits a detection result of the first detection unit to an external device, and receives from the external device operation control information to control the operation of the battery, the operation control information being generated based on;

the detection result of the first detection unit, and

a power amount that is allotted to all batteries that are controlled by N battery control devices in order to adjust a power amount in the utility grid, wherein N is a number that is 2 or larger; and

a control unit that controls the operation of the battery based on the detection result of the second detection unit and based on the operation control information received by the first communication unit,

wherein the control unit further controls the operation of the battery based on the state information,

wherein the first communication unit receives from the external device correction information, which is generated based on the state information, that shows a charge amount or a discharge amount that brings the state of the battery close to a reference state,

wherein the control unit further controls the operation of the battery based on the correction information received by the first communication unit, and

wherein, in a case that, with respect to the charge amounts or the discharge amounts shown in respective pieces of correction information that are transmitted to M battery control devices, the charge amount is a positive value and the discharge amount is a negative value, the first communication unit receives a piece of correction information that corresponds to its own device, from among the respective pieces of correction information in each of which a total sum of a charge amount and a discharge amount is zero, and wherein M is a number that is two or more.

2. A battery control device controlling an operation of a battery that is connected to a utility grid, the battery control device comprising:

a first detection unit that detects state information that shows a state of the battery;

a second detection unit that detects a state of the utility grid;

a first communication unit that transmits a detection result of the first detection unit to an external device, and receives from the external device operation control information to control the operation of the battery, the operation control information being generated based on;

the detection result of the first detection unit, and

a power amount that is allotted to all batteries that are controlled by N battery control devices in order to adjust a power amount in the utility grid, wherein N is a number that is 2 or larger; and

a control unit that controls the operation of the battery based on the detection result of the second detection unit and based on the operation control information received by the first communication unit,

wherein the control unit further controls the operation of the battery based on the state information,

wherein the first communication unit receives from the external device correction information, which is generated based on the state information, that shows a charge amount or a discharge amount that brings the state of the battery close to a reference state,

wherein the control unit further controls the operation of the battery based on the correction information received by the first communication unit, and

wherein, in a case that, with respect to the charge amounts or the discharge amounts shown in respective pieces of correction information that are transmitted to M battery control devices, the charge amount is a positive value and the discharge amount is a negative value, the first communication unit receives a piece of correction information that corresponds to its own device, from among the respective pieces of correction information each of which is generated so that a speed of a change of a total sum of the charge amount and the discharge amount as time elapses becomes an upper limit of a response speed of a power stabilizing operation that is performed by an external power stabilizing device connected to the utility grid, or becomes lower, and wherein M is a number that is two or more.

3. A battery control device controlling an operation of a battery that is connected to a utility grid, the battery control device comprising:

a first detection unit that detects state information that shows a state of the battery;

a second detection unit that detects a state of the utility grid;

a first communication unit that transmits a detection result of the first detection unit to an external device, and receives from the external device operation control information to control the operation of the battery, the operation control information being generated based on;

the detection result of the first detection unit, and

a power amount that is allotted to all batteries that are controlled by N battery control devices in order to adjust a power amount in the utility grid, wherein N is a number that is 2 or larger; and

a control unit that controls the operation of the battery based on the detection result of the second detection unit and based on the operation control information received by the first communication unit,

wherein the control unit further controls the operation of the battery based on the state information,

wherein the first communication unit receives operation information, which shows a relation of the state of the utility grid and an operation content of the battery, from the external device,

wherein the control unit controls the operation of the battery based on the operation information received by the first communication unit,

wherein the state of the utility grid is expressed in a numeric value,

wherein the operation information is generated by using charge amounts or discharge amounts after correction, which are obtained by correcting the charge amounts or the discharge amounts, which bring states of respective batteries controlled by M battery control devices to target states, so that a total sum of the charge amounts or the discharge amounts of the respective batteries is in a linear relation with respect to the numeric value that shows the state of the utility grid in a situation in which the numeric value is within a predetermined range,

wherein M is a number that is two or larger, and

wherein the charge amounts or the discharge amounts before correction of the respective batteries are determined based on the state information of the batteries.

4. A battery control device controlling an operation of a battery that is connected to a utility grid, the battery control device comprising:

a first detection unit that detects state information that shows a state of the battery;

a second detection unit that detects a state of the utility grid;

a first communication unit that transmits a detection result of the first detection unit to an external device, and receives from the external device operation control information to control the operation of the battery, the operation control information being generated based on;

the detection result of the first detection unit, and

a power amount that is allotted to all batteries that are controlled by N battery control devices in order to adjust a power amount in the utility grid, wherein N is a number that is 2 or larger; and

a control unit that controls the operation of the battery based on the detection result of the second detection unit and based on the operation control information received by the first communication unit,

wherein the control unit further controls the operation of the battery based on the state information,

wherein the first communication unit receives a reference state of the battery from the external device,

wherein the control unit further controls the operation of the battery based on a difference between the reference state of the battery received by the first communication unit, and the state of the battery shown by the state information,

wherein the first communication unit receives a speed-related state for determining a correction speed, at which the state of the battery is corrected, from the external device, and

wherein the control unit corrects the difference with the speed-related information received by the first communication unit, and controls the operation of the battery based on a result of the correction.

5. A battery control device controlling an operation of a battery that is connected to a utility grid, the battery control device comprising:

a detection unit that detects a state of an interconnection point of the utility grid and the battery;

a second detection unit that detects a state of the utility grid;

a first communication unit that transmits a detection result of the detection unit to an external device, and receives from the external device operation control information to control the operation of the battery, the operation control information being generated based on;

the detection result of the first detection unit, and

an adjustment target voltage that is a voltage of a voltage adjustment target spot in the utility grid; and

a control unit that controls the operation of the battery based on the detection result of the second detection unit and based on the operation control information received by the first communication unit,

wherein the first communication unit receives the operation control information that is correlation information that shows correlation between the state of the interconnection point and the adjustment target voltage, and

wherein the control unit calculates the adjustment target voltage from the state of the interconnection point by using the correlation information, and when a result of the calculation is outside a predetermined voltage range, the control unit controls the operation of the battery by using the correlation information so that the adjustment target voltage is within the predetermined voltage range.

6. The battery control device according to claim 5,

wherein the utility grid is provided with a voltage adjustment device that changes the adjustment target voltage to a voltage within a specific voltage range when the adjustment target voltage is continuously outside the specific voltage range in the predetermined voltage range for a specific time period, and

wherein when the result of the calculation is larger than an upper limit value of the predetermined voltage range, the control unit controls the operation of the battery by using the correlation information so that the adjustment target voltage is included in a range between the upper limit value and an upper limit value of the specific voltage range, and when the result of the calculation is smaller than a lower limit value of the predetermined voltage range, the control unit controls the operation of the battery by using the correlation information so that the adjustment target voltage is included in a range between the lower limit value and a lower limit value of the specific voltage range.

7. A battery control support device communicating with a battery control device controlling an operation of a battery connected to a utility grid, the battery control support device comprising:

a second communication unit that communicates with the battery control device, and receives state information showing a state of the battery from each of N battery control devices, wherein N is an integer that is 2 or larger; and

a processing unit that generates operation control information to control the operation of the battery, based on information relating to a state of the utility grid, and based on a power amount that is allotted to at least one of a plurality of batteries, and that transmits the operation control information from the second communication unit to the battery control device,

wherein the processing unit generates correction information that shows a charge amount or a discharge amount that brings the state of the battery close to a reference state, based on the state information, and transmits the correction information from the second communication unit to the battery control device,

wherein the number N of the battery control devices is M,

wherein M is an integer that is two or larger, and

wherein the processing unit generates each piece of correction information in which a total sum of a charge amount and a discharge amount becomes zero when the charge amount is a positive value and the discharge amount is a negative value with respect to the charge amount or the discharge amount shown in each piece of the correction information.

8. A battery control support device communicating with a battery control device controlling an operation of a battery connected to a utility grid, the battery control support device comprising:

a second communication unit that communicates with the battery control device, and receives state information showing a state of the battery from each of N battery control devices, wherein N is an integer that is 2 or larger; and

a processing unit that generates operation control information to control the operation of the battery, based on information relating to a state of the utility grid, and based on a power amount that is allotted to at least one of a plurality of batteries, and that transmits the operation control information from the second communication unit to the battery control device,

wherein the processing unit generates correction information that shows a charge amount or a discharge amount that brings the state of the battery close to a reference state, based on the state information, and transmits the correction information from the second communication unit to the battery control device,

wherein the number N of the battery control devices is M,

wherein M is an integer that is two or larger, and

the processing unit generates each piece of correction information so that a speed of a change of a total sum of a charge amount and a discharge amount as time elapses becomes an upper limit of a response speed of a power stabilizing operation performed by an external power stabilizing device connected to the utility grid, or becomes lower, when the charge amount is a positive value and the discharge amount is a negative value, with respect to the charge amount or the discharge amount shown in each piece of the correction information.

9. A battery control support device communicating with a battery control device controlling an operation of a battery connected to a utility grid, the battery control support device comprising:

a second communication unit that communicates with the battery control device, and receives state information showing a state of the battery from each of N battery control devices, wherein N is an integer that is 2 or larger; and

a processing unit that generates operation control information to control the operation of the battery, based on information relating to a state of the utility grid, and based on a power amount that is allotted to at least one of a plurality of batteries, and that transmits the operation control information from the second communication unit to the battery control device,

wherein the number N of the battery control devices is M,

wherein M is an integer that is two or larger,

wherein the state of the utility grid is expressed in a numeric value, and

wherein the processing unit;

determines a charge amount or a discharge amount that brings the state of the battery close to a target state based on the state information of the battery, for each of the batteries,

corrects the charge amounts or the discharge amounts so that a total sum of the charge amounts or the discharge amounts of the respective batteries is in a linear relation with respect to the numeric value in a situation in which the numeric value showing the state of the utility grid is within a predetermined range,

generates operation information that shows a relation between the state of the utility grid and operation contents of the batteries by using the charge amounts or the discharge amounts after correction, and

transmits the operation information from the second communication unit to the battery control devices.

10. A battery control support device communicating with a battery control device controlling an operation of a battery connected to a utility grid, the battery control support device comprising:

a second communication unit that communicates with the battery control device, and receives state information showing a state of the battery from each of N battery control devices, wherein N is an integer that is 2 or larger; and

a processing unit that generates operation control information to control the operation of the battery, based on information relating to a state of the utility grid, and based on a power amount that is allotted to at least one of a plurality of batteries, and that transmits the operation control information from the second communication unit to the battery control device,

wherein the processing unit transmits a reference state of the battery from the second communication unit to the battery control device, and

wherein the processing unit transmits speed-related information for determining a correction speed, at which the state of the battery is corrected, from the second communication unit to the battery control device.

11. A battery control system comprising a first control device that controls an operation of a battery connected to a utility grid, and a second control device that communicates with the first control device,

wherein the first control device comprises:

a first detection unit that detects state information that shows a state of the battery;

a second detection unit that detects a state of the utility grid;

a first communication unit that transmits a detection result of the first detection unit to the second control device, and receives from the second control device operation control information to control the operation of the battery, the operation control information being generated based on;

the detection result of the detection unit, and

a power amount that is allotted to all batteries that are controlled by N first control devices in order to adjust a power amount in the utility grid, wherein N is a number that is 2 or larger, and

a control unit that controls the operation of the battery based on the detection result of the second detection unit and based on a state of the utility grid and based on the operation control information received by the first communication unit, and

the second control device comprises;

a second communication unit that communicates with the first control unit and that receives the state information from each of the N first control devices; and

a processing unit that generates the operation control information based on the state information received by the second communication unit, based on information relating to the utility grid and based on a power amount that is allotted to at least one of a plurality of N batteries, and that transmits the operation control information from the second communication unit to the first control device.

12. A battery control method that is performed by a battery control system including a first control device that controls an operation of a battery connected to a utility grid, and a second control device that communicates with the first control device, wherein:

the first control device detects state information that shows a state of said battery;

the second control device recognizes a power amount that is allotted to all batteries that are controlled by N first control devices in order to adjust a power amount in the utility grid, wherein N is a number that is 2 or larger,

the first control device transmits the state information to the second control device,

the second control device receives the state information from the N first control devices,

the second control device generates operation control information to control the operation of the battery based on the state information, based on information relating to a state of the utility grid, and based on the power amount that is allotted to all batteries,

the second control device transmits the operation control information to the first control device,

the first control device receives the operation control information, and

the first control device controls the operation of the battery based on the state of the utility grid and based on the operation control information.