AU2016306224A1 - Electricity storage control system, instruction control system, electricity storage control device, electricity storage control method, and program - Google Patents

Electricity storage control system, instruction control system, electricity storage control device, electricity storage control method, and program Download PDF

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Publication number
AU2016306224A1
AU2016306224A1 AU2016306224A AU2016306224A AU2016306224A1 AU 2016306224 A1 AU2016306224 A1 AU 2016306224A1 AU 2016306224 A AU2016306224 A AU 2016306224A AU 2016306224 A AU2016306224 A AU 2016306224A AU 2016306224 A1 AU2016306224 A1 AU 2016306224A1
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Australia
Prior art keywords
charge discharge
control
controller
instruction
electrical energy
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Abandoned
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AU2016306224A
Inventor
Masanori Maruoka
Toshio Taniguchi
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Publication of AU2016306224A1 publication Critical patent/AU2016306224A1/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/62—The condition being non-electrical, e.g. temperature
    • H02J2310/64—The condition being economic, e.g. tariff based load management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S50/00—Market activities related to the operation of systems integrating technologies related to power network operation or related to communication or information technologies
    • Y04S50/10—Energy trading, including energy flowing from end-user application to grid

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The purpose of the present invention is to provide an electricity storage control system with which it is possible to improve responsiveness from a request for power adjustment through control of operation of the electricity storage device. This electricity storage control system (1) is provided with an electricity storage control unit (31), a plan control unit (411), and an interrupt control unit (412). The electricity storage control unit (31) controls the operation of the electricity storage device (2). The plan control unit (411) outputs, to the electricity storage control unit (31), plan control instructions indicating the content of operation instructions for the electricity storage device (2) during a designated period. The interrupt control unit (412) outputs, to the electricity storage control unit (31), interrupt control instructions indicating the content of operation instructions for the electricity storage device (2). The electricity storage control unit (31) controls the operation of the electricity storage device (2) on the basis of the received plan control instructions, and when an interrupt control instruction is received, controls the operation of the electricity storage device (2) on the basis of a second control instruction.

Description

invention is to provide an electricity storage control system with which it is possible to improve responsiveness from a request for power adjustment through control of operation of the electricity storage device. This electricity storage control system (1) is provided with an electricity storage control unit (31), a plan control unit (411), and an interrupt control unit (412). The electricity storage control unit (31) controls the operation of the electricity storage device (2). The plan control unit (411) outputs, to the electricity storage control unit (31), plan control instructions indicating the content of operation instructions for the electricity storage device (2) during a designated period. The interrupt control unit (412) outputs, to the electricity storage control unit (31), interrupt control instructions indicating the content of operation instructions for the electricity storage device (2). The electricity storage control unit (31) controls the operation of the electricity storage device (2) on the basis of the received plan control instructions, and when an interrupt control instruction is received, controls the operation of the electricity storage device (2) on the basis of a second control instruction.
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DESCRIPTION
Title of Invention
CHARGE DISCHARGE CONTROL SYSTEM, INSTRUCTION CONTROL DEVICE, CHARGE DISCHARGE CONTROL DEVICE, CHARGE DISCHARGE CONTROL METHOD AND PROGRAM
Technical Field [0001] The invention relates to a charge discharge control system, an instruction control device, a charge discharge control device, a charge discharge control method and a program.
Background Art [0002] A managing system (charge discharge control system) equipped with an electrical energy storage having a storage battery configured to store electric power and a controller configured to communicate with the electrical energy storage is known conventionally (see for example, Patent Document l). Patent Document 1 discloses a configuration in which the controller provides the electrical energy storage with an instruction for an operating mode of the storage battery.
[0003] When unbalanced supply and demand of electric power is predicted, electricity utilities will provide each customer facility with a request for power adjustment. In order to balance the supply and demand of electric power, the request may include, for example content of battery charge discharge control that causes the storage battery to discharge or charge. In case of an emergency request for power adjustment, the battery charge discharge control needs to be performed within a short time period from receipt of the request.
Citation List
Patent Literature [0004] Patent Document U JP 2014-33591 A
Summary of Invention [0005] The present invention has been achieved in view of the above circumstances, and an object thereof is to provide a charge discharge control system, an instruction control device, a charge discharge control device, a charge discharge control method and a program, capable of improving responsiveness from receipt of a request for power adjustment to start of operation control of an electrical energy storage.
[0006] A charge discharge control system according to an aspect of the present invention is configured to control an electrical energy storage, and includes a charge discharge control device, a first controller and a second controller. The charge discharge control device has a storage battery and is allowed to be installed in a customer facility. The charge discharge controller is configured to control operation of the electrical energy storage. The first controller is configured to provide the charge discharge controller with a first control instruction representing operation instruction content with respect to the electrical energy storage during a target period. The second controller is configured to provide the charge discharge controller with a second control instruction representing operation instruction content with respect to the electrical energy storage. The charge discharge controller is configured to control the operation of the electrical energy storage based on the first control instruction received from the first controller within the target period. The charge discharge controller is also configured to, when receiving the second control instruction from the second controller within the target period, control the operation of the electrical energy storage based on the second control instruction.
[0007] An instruction control device according to an aspect of the present invention is allowed to be provided in the charge discharge control system and includes the first controller.
[0008] An instruction control device according to an aspect of the present invention is allowed to be provided in the charge discharge control system and includes the first controller and the second controller.
[0009] A charge discharge control device according to an aspect of the present invention is allowed to be provided in the charge discharge control system and includes the charge discharge controller.
[0010] A charge discharge control method according to an aspect of the present invention includes controlling an electrical energy storage having a storage battery and allowed to be installed in a customer facility. The charge discharge control method includes controlling operation of the electrical energy storage based on a first control instruction representing operation instruction content with respect to the electrical energy storage during a target period. The charge discharge control method also includes, when there is a second control instruction representing operation instruction content with respect to the electrical energy storage within the target period, controlling the operation of the electrical energy storage based on the second control instruction.
[0011] A program according to an aspect of the present invention is a program for controlling an electrical energy storage having a storage battery and allowed to be installed in a customer facility. The program is provided for causing a computer to function as a charge discharge controller configured to control operation of the electrical energy storage based on a first control instruction representing operation instruction content with respect to the electrical energy storage during a target period, and when there is a second control instruction representing operation instruction content with respect to the electrical energy storage within the target period, control the operation of the electrical energy storage based on the second control instruction.
Brief Description of Drawings [0012] Figure 1 is a block diagram of a charge discharge control system according to an aspect of the present invention;
Figure 2 is a flowchart showing operation of an instruction control device according to an aspect of the present invention;
Figure 3 is a flowchart showing operation of a charge discharge control device according to an aspect of the present invention;
Figure 4 is a block diagram of a modified example of the charge discharge control system according to the aspect of the present invention! and
Figure 5 is a block diagram of another modified example of the charge discharge control system according to the aspect of the present invention
Description of Embodiments [0013] Embodiments of the present invention will hereinafter be explained with reference to the drawings.
[0014] (Embodiment)
Figure 1 shows a block diagram of a charge discharge control system 1 according to the present embodiment. First, the embodiment will describe in outline the charge discharge control system 1.
[0015] The charge discharge control system 1 according to the embodiment is configured to control an electrical energy storage 2 and includes a charge discharge controller 31, a plan controller 411 as a first controller, and an interrupt controller 412 as a second controller. The electrical energy storage 2 has a storage battery 21 and is allowed to be installed in a detached house 6 (customer facility). The charge discharge controller 31 is configured to control operation of the electrical energy storage 2. The plan controller 411 is configured to provide the charge discharge controller 31 with a plan control instruction as a first control instruction representing operation instruction content with respect to the electrical energy storage 2 during a target period. The interrupt controller 412 is configured to provide the charge discharge controller 31 with an interrupt control instruction as a second control instruction representing operation instruction content with respect to the electrical energy storage 2. The charge discharge controller 31 is configured to control the operation of the electrical energy storage 2 based on the plan control instruction received from the plan controller 411 within the target period. The charge discharge controller 31 is also configured to, when receiving the interrupt control instruction from the interrupt controller 412 within the target period, control the operation of the electrical energy storage 2 based on the second control instruction.
[0016] With the configuration, when receiving an emergency request for power adjustment, the charge discharge control system 1 according to the embodiment may transmit the request as the interrupt control instruction to the charge discharge controller 31. When receiving the interrupt control instruction, the charge discharge controller 31 may make the interrupt control instruction take priority over the plan control instruction to control the operation of the electrical energy storage 2 based on the interrupt control instruction. This therefore enables improvement in the responsiveness from receipt of a request for power adjustment to start of operation control of the electrical energy storage 2.
[0017] The charge discharge control system 1 according to the present embodiment will hereinafter be explained in detail. The charge discharge control system 1 according to the embodiment includes a charge discharge control device 3 having the charge discharge controller 31, and an instruction control device 41 having the plan controller 411 and the interrupt controller 412. Note that in the embodiment the detached house 6 is exemplified as the customer facility, but the customer facility may be an apartment block (apartment building), an office block or the like.
[0018] A commercial power supply 7, the electrical energy storage 2 and a power generator 8 are provided for the detached house 6 as a power supply for the supply of electric power to electrical loads 61 such as luminaires, air conditioners and refrigerators.
[0019] The commercial power supply 7 is electrically connected to a distribution board 63 provided in the detached house 6 via an electric power system 71 and a power meter 62, and supplies AC power (commercial power) to the distribution board 63.
[0020] The power generator 8 is, for example a photovoltaic power generator and includes photovoltaic modules 81 and a power conditioner 82. The photovoltaic modules 81 are provided on a housetop or the like of the detached house 6 and configured to receive sunlight to generate electric power. The power conditioner 82 is configured to convert DC power generated with the photovoltaic modules 81 into AC power to be supplied to the distribution board
63. The power conditioner 82 is allowed to convert DC power generated with the photovoltaic modules 81 into AC power to be reverse flowed to the electric power system 71, thereby selling electricity. Note that the power generator 8 is not limited to the photovoltaic power generator, but may be, for example a fuel cell power generator including a fuel cell(s). In addition, both the photovoltaic power generator and the fuel cell power generator may be employed as the power generator 8.
[0021] The electrical energy storage 2 includes the storage battery 21 and a power converter 22. The storage battery 21 is allowed to charge and discharge. The power converter 22 is configured to convert DC power discharged from the storage battery 21 into AC power to be supplied to the distribution board 63. The power converter 22 is also configured to convert AC power supplied from the distribution board 63 into DC power to charge the storage battery 21. A main breaker, branch breakers and the like are built in the distribution board 63. The electrical loads 61 are to be supplied with AC power via branch circuits connected to the branch breakers.
[0022] The charge discharge control device 3 provided in the detached house 6 is configured to control charge discharge operation of the storage battery 21 in the electrical energy storage 2. The charge discharge operation of the storage battery 21 includes charge operation when the storage battery 21 charges, and discharge operation when the storage battery 21 discharges. The electrical energy storage 2 and the charge discharge control device 3 are configured to perform mutual communication such as wired communication via signal lines or wireless communication using wireless signals as communication medium. The charge discharge control device 3 will control the power converter 22 of the electrical energy storage 2, thereby controlling the charge discharge operation of the storage battery 21 in the electrical energy storage 2. The charge discharge control device 3 will also determine instruction content of the charge discharge operation with respect to the electrical energy storage 2 based on the plan control instruction or the interrupt control instruction from the instruction control device 41.
[0023] In recent years, electricity utility or the like has made a proposal for demand response service in order to adjust the supply and demand of electric power. A method proposed as one of demand response techniques includes providing the customer facility with the electrical energy storage 2 or the electrical energy storage 2 and the power generator 8 and utilizing electricity price varying by time-of-day, thereby suppressing a power demand peak. For example, increasing electricity price during time-of-day including a power demand peak to be suppressed to promote discharge of the storage battery 21 in the electrical energy storage 2 enables reduction in a total electricity bill that a customer pays. The suppression of the power demand peak enables the electricity utility as an energy supplier to reduce electricity procurement cost.
[0024] It is important for a customer to optimize charge discharge (charge and discharge) timing of the storage battery 21 in order to reduce the electricity bill. For example, the charge discharge timing of the storage battery 21 may be optimized based on not only the electricity bill but also different pieces of information such as past actual power consumption values, calendar information, customer’s electricity contract, the state of the storage battery 21 and weather forecast or predictions about the different pieces of information. The different pieces of information and the predictions about the different pieces of information need a huge amount of data and complicated arithmetic. For example, a cloud server may therefore be utilized for the arithmetic in place of a terminal (device) provided in the customer facility. Planning the charge discharge timing of the storage battery 21 through the cloud server is able to efficiently utilize the different pieces of information and cope with variations of supply and demand of electric power among customer facilities or in the electric power system as a macro viewpoint. In addition, the server planning respective charge discharge timing of the storage batteries 21 with respect to the customer facilities enables sharing the computer resource and reducing the cost.
[0025] The electricity utility regards electrical energy storages 2 provided in customer facilities as dispersed power supplies, thereby making it possible to utilize the electrical energy storages 2 as auxiliary power supply facilities for power demand tightness. This may be regarded as direct load control (DLC) as one of demand response techniques. It is also predicted that the electricity procurement cost in the market will change within a short time such as, for example five minutes or thirty minutes. The electricity utility is able to reduce electricity procurement cost by causing the storage batteries 21 of the electrical energy storages 21 provided in customer facilities to discharge without procuring electricity by high cost from the market. The electricity utility needs to make, as a demand response (DR) request, a request for electricity adjustment with respect to the customers, such as charge discharge of the storage batteries 21 of the electrical energy storages 2 provided in customer facilities. The DR request contains operation content such as a period of time to be requested for electricity adjustment (hereinafter called a requested time period), electricity amount to be adjusted, and charge or discharge of the storage batteries 21.
[0026] The charge discharge control system 1 according to the embodiment includes a control server group 41 configured to balance the supply and demand of electric power between the electricity utility and the customer facilities and optimize respective charge discharge timing of the storage batteries 21 in the electrical energy storages 2 installed in the detached houses 6 (customer facilities). The control server group 4 is to be managed by an aggregator and includes instruction control devices 41 and databases 42. Each of the instruction control devices 41 is composed of a server. The instruction control devices 41 and the databases 42 are linked with each other, thereby constituting a cloud computing system. A control object of each of the instruction control devices 41 includes detached houses 6 (customer facilities), and Figure 1 shows only one of the detached houses 6.
[0027] The control server group 4 is provided outside the detached houses 6 (customer facilities) and configured to transmit respective operation instruction content of the electrical energy storages 2 installed in the detached houses 6 (customer facilities) to the charge discharge control devices 3 so that charge discharge timing of the electrical energy storages 2 in the electrical energy storages 2 are optimized. The charge discharge timing is timing (time period) for performing charge operation of the storage batteries 21 and timing (time period) for performing discharge operation of the storage batteries 21. Each instruction control devices 41 includes the plan controller 411, the interrupt controller 412 and a communicator 413.
[0028] The plan controller 411 is configured to work out respective charge 5 discharge timing of storage batteries 21 as optimum charge discharge timing of the storage batteries 21 based on different pieces of information such as the state of supply and demand of electric power in detached houses 6 (customer facilities), calendar information, customers’ electricity contract, respective states of the storage batteries 21 and weather forecast. The plan controller
411 works out respective charge discharge timing of the storage batteries 21 for a target period as a relatively long time period—for example, works out respective charge discharge timing of the storage batteries 21 for 24 hours from current time. The plan controller 411 then produces plan control instructions (first control instructions) representing respective charge discharge timing of the storage batteries 21 worked out as respective operation instruction content of the electrical energy storages 2. The plan controller 411 also produces respective plan control instructions at predetermined intervals (e.g., thirty minutes, one hour)—namely renews respective plan control instructions. The plan controller 411 produces plans for respective charge discharge timing of the storage batteries 21 for the target period (24 hours from production of plan control instructions) whenever the plan control instructions are renewed. Accordingly, even if there is(are) a change(s) in prediction results about the different pieces of information as described above, it is possible to produce optimum plans for respective charge discharge timing of the storage batteries 21 (plan control instructions) according to the change(s).
[0029] The interrupt controller 412 is configured to, when an event requiring urgent modification in the plan control instructions produced by the plan controller 411 occurs, produce respective interrupt control instructions (second control instructions) representing respective charge discharge timing of the storage batteries 21 based on the event as respective operation instruction content of the storage batteries 21. Timing for producing the interrupt control instructions by the interrupt controller 412 will be described later. [0030] The communicator 413 is a communication interface and connected to communication lines 9 (e.g., the Internet). The plan controller 411 and the interrupt controller 412 are configured to provide each charge discharge control device 3 with a plan control instruction and an interrupt control instruction via the communicator 413, respectively.
[0031] Each charge discharge control device 3 includes the charge discharge controller 31, a storage device 32 and a communicator 33, and is configured to control charge discharge of the storage battery 21 in the electrical energy storage 2 based on the plan control instruction or the interrupt control instruction from the instruction control device 41.
[0032] The communicator 33 is a communication interface and connected to the communication lines 9 via a router 64 installed in the detached house 6. The communicator 33 is to receive the plan control instruction and the interrupt control instruction from the instruction control device 41 via the communication lines 9 and the router 64.
[0033] The storage device 32 is configured to store the plan control instruction and the interrupt control instruction received with the communicator 33. Note that whenever the communicator 33 receives a plan control instruction, the plan control instruction stored in the storage device 32 will be renewed and replaced with a newest plan control instruction.
[0034] The charge discharge controller 31 is configured to reference the plan control instruction or the interrupt control instruction stored in the storage device 32 and control charge discharge operation of the storage battery 21 in the electrical energy storage 2 in accordance with charge discharge timing of the storage battery 21 corresponding to the current time. When the plan control instruction and the interrupt control instruction overlap each other, the charge discharge controller 31 is to prioritize the interrupt control instruction to control the operation of the storage battery 21 based on the interrupt control instruction.
[0035] The instruction control device 41 further includes a determination unit 414 that is configured to determine content of a DR request from the server 5 of the electricity utility. Based on the content of the DR request, the determination unit 414 is to instruct the plan controller 411 to produce a plan control instruction or instruct the interrupt controller 412 to produce an interrupt control instruction.
[0036] Specifically, the determination unit 414 determines whether or not the content of the DR request is processable content by the charge discharge control device 3. When the content of the DR request is, for example simple content without requiring complicated arithmetic processing such as “discharge (or charge) of storage battery 21 is requested during prescribed time period (requested time period)”, the determination unit 414 determines that it is “processable by charge discharge control device 3”. On the other hand, when the content of the DR request is, for example content requiring cooperative operation among electrical energy storages 2 of customer facilities such as “request for reduction in regional commercial electricity usage within requested time period”, the determination unit 414 determines that it is “not processable by charge discharge control device 3”. The determination unit 414 further determines whether start time of the requested time period by the DR request is earlier or later than production timing of the next plan control instruction by the plan controller 411.
[0037] Based on the determination result of the content of the DR request, the determination unit 414 then instructs the plan controller 411 to produce a plan control instruction or instructs the interrupt controller 412 to produce an interrupt control instruction. Specifically, when the content of the DR request is processable by charge discharge control device 3 and the start time of the requested time period is earlier than production timing of the next plan control instruction, the determination unit 414 instructs the interrupt controller 412 to produce an interrupt control instruction. In this case, the interrupt controller 412 produces an interrupt control instruction based on the content of the DR request to provide the interrupt control instruction produced to the charge discharge control device 3. Note that the interrupt controller 412 may provide the charge discharge control device 3 with the DR request as the interrupt control instruction.
[0038] When the content of the DR request is not processable by charge discharge control device 3 and the start time of the requested time period is later than production timing of the next plan control instruction, the determination unit 414 instructs the plan controller 411 to produce a plan control instruction. In this case, the plan controller 411 produces a plan control instruction at production timing of the next plan control instruction based on the content of the DR request and the above different pieces of information such as the state of the supply and demand of electric power. The plan controller 411 then provides the plan control instruction produced to the charge discharge control device 3.
[0039] Operation of the embodiment responsive to receipt of the DR request by the instruction control device 41 will hereinafter be explained with reference to the flowchart of Figure 2.
[0040] When the instruction control device 41 receives the DR request from the electricity utility (step Si), the determination unit 414 determines the content of the DR request. That is, the determination unit 414 determines whether or not the content of the DR request is processable content by the charge discharge control device 3 (step S2). When determining that the content of the DR request is processable by the charge discharge control device 3 (Yes at step S2), the determination unit 414 determines whether or not the start time of the requested time period of the DR request is earlier than the production timing of the next plan control instruction (step S3). When the start time of the requested time period of the DR request is earlier than the production timing of the next plan control instruction (Yes at step S3), the determination unit 414 instructs the interrupt controller 412 to produce an interrupt control instruction (step S4). The interrupt controller 412 produces an interrupt control instruction based on the content of the DR request to provide the interrupt control instruction to the charge discharge control device 3 via the communicator 413 (step S5).
[0041] On the other hand, when the determination unit 414 determines that the content of the DR request is not processable by the charge discharge control device 3 at step S2 (No at step S2), the determination unit 414 instructs the plan controller 411 to produce a plan control instruction (step S6). When the start time of the requested time period of the DR request is later than the production timing of the next plan control instruction at step S3 (No at step S3), the determination unit 414 instructs the plan controller 411 to produce a plan control instruction (step S6). The plan controller 411 produces a plan control instruction at the production timing of the next plan control instruction based on the content of the DR request and the above different pieces of information such as the state of the supply and demand of electric power. The plan controller 411 then provides the plan control instruction produced to the charge discharge control device 3 (step S7).
[0042] Thus, when a time period up to the start time of the requested time period of the DR request as an emergency is short and the content of the DR request is processable by the charge discharge control device 3, the instruction control device 41 immediately produces an interrupt control instruction based on the DR request and provides the interrupt control instruction produced to the charge discharge control device 3. On the other hand, when a time period up to the start time of the requested time period of the DR request is long or when the content of the DR request requires a complicated arithmetic processing, the instruction control device 41 performs the arithmetic processing to produce a plan control instruction to be provided to the charge discharge control device 3.
[0043] Operation for charge discharge control of the storage battery 21 by the charge discharge controller 31 will hereinafter be explained with reference to the flowchart of Figure 3.
[0044] The charge discharge controller 31 performs charge discharge control of the storage battery 21 based on the plan control instruction or the interrupt control instruction stored in the storage device 32. First, the charge discharge controller 31 confirms whether or not the plan control instruction corresponding to the current time is stored in the storage device 32 (step Sil). When the plan control instruction corresponding to the current time is stored in the storage device 32 (Yes at step Sil), the charge discharge controller 31 confirms whether or not the interrupt control instruction corresponding to the current time is stored in the storage device 32 (step S12). When the interrupt control instruction corresponding to the current time is stored in the storage device 32 (Yes at step S12), the charge discharge controller 31 confirms whether or not the production time of the plan control instruction is later than the production time of the interrupt control instruction (step Si3). When the production time of the plan control instruction is later than the production time of the interrupt control instruction (Yes at step S13), the charge discharge controller 31 controls charge discharge of the storage battery 21 based on the plan control instruction (step Si4).
[0045] On the other hand, when the plan control instruction corresponding to the current time is not stored in the storage device 32 at step S 11 (No at step Sil), the charge discharge controller 31 confirms whether or not the interrupt control instruction corresponding to the current time is stored in the storage device 32 (step Si5). When the interrupt control instruction corresponding to the current time is stored in the storage device 32 (Yes at step Si5), the charge discharge controller 31 controls charge discharge of the storage battery 21 based on the interrupt control instruction (step Si6). When the interrupt control instruction corresponding to the current time is not stored in the storage device 32 (No at step S15), the charge discharge controller 31 controls charge discharge of the storage battery 21 based on a preset instruction (step Si7). Examples of the “preset instruction” include “stand-by” in which neither charge nor discharge of the storage battery 21 is performed, and “automatic operation” in which the charge discharge control device 3 controls charge discharge of the storage battery 21 based on the state of the storage battery 21, the state of the supply and demand of electric power in the detached house 6 and the like.
[0046] When the interrupt control instruction corresponding to the current time is not stored in the storage device 32 at step S12 (No at step S12), the charge discharge controller 31 controls charge discharge of the storage battery 21 based on the plan control instruction (step Si8).
[0047] When the production time of the plan control instruction is earlier than the production time of the interrupt control instruction (No at step S13), the charge discharge controller 31 controls charge discharge of the storage battery 21 based on the interrupt control instruction (step Si9).
[0048] Thus, when the plan control instruction and the interrupt control instruction that correspond to the current time overlap each other, the charge discharge controller 31 prioritizes the interrupt control instruction to perform charge discharge control of the storage battery 21. Note that when the plan control instruction is produced after the interrupt control instruction, the plan control instruction contains the content of the interrupt control instruction and therefore the charge discharge controller 31 performs charge discharge control of the storage battery 21 based on the plan control instruction.
[0049] As stated above, with the charge discharge control system 1 according to the present embodiment, the instruction control device 41 provides the charge discharge control device 3 with the DR request as the interrupt control instruction when the content of the DR request as an emergency is processable content by the charge discharge control device 3. The charge discharge control device 3 prioritizes the interrupt control instruction to perform charge discharge control of the storage battery 21. That is, the DR request as an emergency is transmitted as the interrupt control instruction to the charge discharge control device 3 regardless of production intervals of the plan control instructions, and charge discharge control of the storage battery 21 is performed based on the interrupt control instruction. Therefore, a reflection of the content of the DR request as an emergency on the plan control instruction requires neither shortening of production intervals of the plan control instructions nor facility expansion of the control server group 4. As a result, cost reduction can be achieved. It is further possible for the electricity utility to transmit a DR request as an emergency to each of the charge discharge control devices 3 without delay in the control server group 4 to perform charge discharge control each storage battery 21. That is, the charge discharge control system 1 according to the embodiment is able to improve responsiveness from receipt of a request for power adjustment (DR request) to start of operation control of each electrical energy storage 2.
[0050] An instruction control device 41 according to an embodiment includes a plan controller 411 (first controller) and is to be provided in a charge discharge control system 1. In other words, the instruction control device 41 according to the embodiment is allowed to be provided in the charge discharge control system 1. The charge discharge control system 1 is a system for controlling an electrical energy storage 2 and includes a charge discharge controller 31, the plan controller 411 as a first controller and an interrupt controller 412 as a second controller. The electrical energy storage 2 has a storage battery 21 and is allowed to be installed in a detached house 6 (customer facility). The charge discharge controller 31 is configured to control operation of the electrical energy storage 2. The plan controller 411 is configured to provide the charge discharge controller 31 with a plan control instruction as a first control instruction representing operation instruction content with respect to the electrical energy storage 2 during a target period. The interrupt controller 412 is configured to provide the charge discharge controller 31 with an interrupt control instruction as a second control instruction representing operation instruction content with respect to the electrical energy storage 2. The charge discharge controller 31 is configured to control the operation of the electrical energy storage 2 based on the plan control instruction received from the plan controller 411 within the target period. The charge discharge controller 31 is also configured to, when receiving the interrupt control instruction from the interrupt controller 412 within the target period, control the operation of the electrical energy storage 2 based on the second control instruction.
[0051] The above configuration enables improvement in responsiveness from receipt of a request for power adjustment (DR request) to the start of operation control of the electrical energy storage 2 by the instruction control device 41. [0052] An instruction control device 41 according to an embodiment includes a plan controller 411 as a first controller and an interrupt controller 412 as a second controller and is to be provided in a charge discharge control system 1. In other words, the instruction control device 41 according to the embodiment is allowed to be provided in the charge discharge control system 1. The charge discharge control system 1 is a system for controlling an electrical energy storage 2 and includes a charge discharge controller 31, the plan controller 411 as a first controller and the interrupt controller 412 as a second controller. The electrical energy storage 2 has a storage battery 21 and is allowed to be installed in a detached house 6 (customer facility). The charge discharge controller 31 is configured to control operation of the electrical energy storage 2. The plan controller 411 is configured to provide the charge discharge controller 31 with a plan control instruction as a first control instruction representing operation instruction content with respect to the electrical energy storage 2 during a target period. The interrupt controller 412 is configured to provide the charge discharge controller 31 with an interrupt control instruction as a second control instruction representing operation instruction content with respect to the electrical energy storage 2. The charge discharge controller 31 is configured to control the operation of the electrical energy storage 2 based on the plan control instruction received from the plan controller 411 within the target period. The charge discharge controller 31 is also configured to, when receiving the interrupt control instruction from the interrupt controller 412 within the target period, control the operation of the electrical energy storage 2 based on the second control instruction. The instruction control device 41 includes the plan controller 411 (first controller) and the interrupt controller 412 (second controller).
[0053] The above configuration enables improvement in responsiveness from receipt of a request for power adjustment (DR request) to the start of operation control of the electrical energy storage 2 by the instruction control device 41. [0054] A charge discharge control device 3 according to an embodiment includes a charge discharge controller 31 and is to be provided in a charge discharge control system 1. In other words, the charge discharge control device 3 according to the embodiment is allowed to be provided in the charge discharge control system 1. The charge discharge control system 1 is a system for controlling an electrical energy storage 2 and includes the charge discharge controller 31, a plan controller 411 as a first controller and an interrupt controller 412 as a second controller. The electrical energy storage 2 has a storage battery 21 and is allowed to be installed in a detached house 6 (customer facility). The charge discharge controller 31 is configured to control operation of the electrical energy storage 2. The plan controller 411 is configured to provide the charge discharge controller 31 with a plan control instruction as a first control instruction representing operation instruction content with respect to the electrical energy storage 2 during a target period. The interrupt controller 412 is configured to provide the charge discharge controller 31 with an interrupt control instruction as a second control instruction representing operation instruction content with respect to the electrical energy storage 2. The charge discharge controller 31 is configured to control the operation of the electrical energy storage 2 based on the plan control instruction received from the plan controller 411 within the target period. The charge discharge controller 31 is also configured to, when receiving the interrupt control instruction from the interrupt controller 412 within the target period, control the operation of the electrical energy storage 2 based on the second control instruction. The charge discharge control device 3 includes the charge discharge controller 31.
[0055] The above configuration enables improvement in responsiveness from receipt of a request for power adjustment (DR request) to the start of operation control of the electrical energy storage 2 by the charge discharge control device
3.
[0056] A charge discharge control method according to an embodiment includes controlling an electrical energy storage 2 having a storage battery 21 and allowed to be installed in a detached house 6 (customer facility). The charge discharge control method includes controlling operation of the electrical energy storage 2 based on a plan control instruction as a first control instruction representing operation instruction content with respect to the electrical energy storage 2 during a target period. The charge discharge control method also includes, when there is an interrupt control instruction as a second control instruction representing operation instruction content with respect to the electrical energy storage 2 within the target period, controlling the operation of the electrical energy storage 2 based on the interrupt control instruction.
[0057] The above charge discharge control method enables improvement in responsiveness from receipt of a request for power adjustment (DR request) to the start of operation control of the electrical energy storage 2.
[0058] The charge discharge controller 31 is composed of a computer that executes a program, thereby including the abovementioned functions. The computer is composed of, for example, a central processing unit (CPU) provided separately from a memory or a microcomputer provided integrally with a memory. Examples of program supply include: supply through a storage medium storing the program in advance, such as computer readable read only memory (ROM) and optical disk! and supply of the program to a storage medium via a wide area network including the Internet.
[0059] The program is a program for controlling an electrical energy storage 2 having a storage battery 21 and allowed to be installed in a detached house 6 (customer facility). The program is provided for causing a computer to function as a charge discharge controller 31. The charge discharge controller 31 is configured to control operation of the electrical energy storage 2 based on a first control instruction representing operation instruction content with respect to the electrical energy storage 2 during a target period. The charge discharge controller 31 is also configured to, when there is a second control instruction representing operation instruction content with respect to the electrical energy storage 2 within the target period, control the operation of the electrical energy storage 2 based on the second control instruction.
[0060] The above program enables improvement in responsiveness from receipt of a request for power adjustment (DR request) to the start of operation control of the electrical energy storage 2.
[0061] The plan controller 411 (first controller) according to any one of the embodiments is configured to provide the charge discharge controller 31 with the plan control instruction (first control instruction) at predetermined intervals, each shorter than the target period. The charge discharge controller 31 is configured to control the operation of the electrical energy storage 2 based on a latest plan control instruction.
[0062] The plan controller 411 (first controller) renews the plan control instruction at the predetermined intervals (e.g., thirty minutes, one hour). Whenever renewing the plan control instruction, the plan controller 411 produces a plan for charge discharge timing of the storage battery 21 for the target period (24 hours from production of the plan control instruction). Accordingly, even if there is a change in balance between supply and demand of electric power, it is possible to produce a plan control instruction as a plan for charge discharge timing of the storage battery 21, optimized according to the change.
[0063] The charge discharge controller 31 according to the embodiment is configured to, when failing to receive a plan control instruction (first control instruction) to be received, control the operation of the electrical energy storage 2 based on a previous plan control instruction.
[0064] The plan control instruction is renewed at the predetermined intervals, each (e.g., thirty minutes, one hour) shorter than the target period (e.g., 24 hours), and target periods of plan control instructions having antecedent and subsequent renewal timing overlap each other. The charge discharge control device 3 is able to control the operation of the electrical energy storage 2 based on the previous plan control instruction, even when the charge discharge control device 3 fails to receive a plan control instruction to be received due to communication failure between the instruction control device 41 and the charge discharge control device 3. As a result, availability of the charge discharge control system 1 can be highly maintained and maintenance cost can be reduced.
[0065] The interrupt controller 412 (second controller) may be configured to provide the charge discharge controller 31 with the interrupt control instruction (second control instruction) when an electricity purchase price exceeds a threshold.
[0066] The electricity utility may cause the storage battery 21 to discharge when an electricity purchase price in the market is greater than a predetermined price (threshold), and cause the storage battery 21 to charge when the electricity purchase price is less than the predetermined price, thereby making it possible to reduce electricity procurement cost. A change in the electricity purchase price in the market may be a change after a short time such as, for example five minutes. In the present embodiment, when the electricity purchase price changes to exceed the predetermined price (threshold), an interrupt control instruction based on the electricity purchase price will be provided to the charge discharge controller 31. It is therefore possible to immediately cause the storage battery 21 to charge and discharge responsive to a change in the electricity purchase price.
[0067] The embodiments reflect content of the DR request in any of the plan control instruction and the interrupt control instruction by the determination of the determination unit 414, but are not limited to this. For example, the instruction control device 41 may transmit content of the DR request to the charge discharge control device 3 regardless of the content of the DR request, and the charge discharge control device 3 may perform charge discharge control of the storage battery 21 as long as control of the electrical energy storage 2 based on the content of the DR request is allowed. The plan controller 411 of the instruction control device 41 may produce a plan control instruction reflecting the content of the DR request at production timing of the next plan control instruction to provide the plan control instruction to the charge discharge control device 3. Thus, when processing of the content of the DR request is allowed, the charge discharge control device 3 controls the electrical energy storage 2 in accordance with the content of the DR request, thereby enabling improvement in responsiveness from receipt of the DR request to start of operation control of each electrical energy storage 2. The plan control instruction reflecting the content of the DR request is produced at production timing for the next plan control instruction, and the charge discharge control device 3 controls the storage battery 21 in accordance with the plan control instruction, thereby making it possible to perform charge discharge control of the storage battery 21 further optimized.
[0068] Figure 4 shows a modified example of the charge discharge control system 1. Note that the modified example below may be suitably combined with and applied to the embodiments. In a charge discharge control system 1A of the modified example, a charge discharge control device 3 further includes an interrupt controller 34 configured to produce an interrupt control instruction.
[0069] The charge discharge control device 3 of the modified example includes a period monitor 35. The period monitor 35 is configured to monitor a target period of a plan control instruction stored in a storage device 32. There is a concern that when communication failure occurs between an instruction control device 41 and the charge discharge control device 3, the charge discharge control device 3 fails to receive a plan control instruction from the instruction control device 41, and consequently the target period of the plan control instruction will end with the plan control instruction in the storage device 32 not renewed. The period monitor 35 detects the end of the target period of the plan control instruction stored in the storage device 32 while monitoring the target period of the plan control instruction, and notifies a detection result to the interrupt controller 34. The interrupt controller 34 produces an interrupt control instruction when the target period of the plan control instruction ends, and provides the interrupt control instruction to a charge discharge controller 31. Examples of the interrupt control instruction in this case include “stand-by” in which neither charge nor discharge of the storage battery 21 is performed, “automatic operation” in which the charge discharge control device 3 controls charge discharge of a storage battery 21 based on the state of the storage battery 21, the state of the supply and demand of electric power in the detached house 6 and the like.
[0070] Thus, the interrupt controller 34 (second controller) is configured to provide the charge discharge controller 31 with an interrupt control instruction (second control instruction) when the target period of the plan control instruction (first control instruction) received with the first control instruction ends. The charge discharge controller 31 is configured to control operation of an electrical energy storage 2 based on the interrupt control instruction.
[0071] The configuration enables the charge discharge controller 31 to continue charge discharge control of the storage battery 21 even when the target period of the plan control instruction ends with communication failure between the instruction control device 41 and the charge discharge control device 3 continuing for a constant time period or more.
[0072] A charge discharge control device 3 is to be provided in the charge discharge control system 1A and includes a charge discharge controller 31 and an interrupt controller 412 as a second controller. In other words, the charge discharge control device 3 is allowed to be provided in the charge discharge control system 1A. The charge discharge control system 1A is a system for controlling an electrical energy storage 2 and includes the charge discharge controller 31, a plan controller 411 as a first controller and the interrupt controller 412 (second controller). The electrical energy storage 2 has a storage battery 21 and is allowed to be installed in a detached house 6 (customer facility). The charge discharge controller 31 is configured to control operation of the electrical energy storage 2. The plan controller 411 is configured to provide the charge discharge controller 31 with a plan control instruction as a first control instruction representing operation instruction content with respect to the electrical energy storage 2 during a target period. The interrupt controller 412 is configured to provide the charge discharge controller 31 with an interrupt control instruction as a second control instruction representing operation instruction content with respect to the electrical energy storage 2. The charge discharge controller 31 is configured to control the operation of the electrical energy storage 2 based on the plan control instruction received from the plan controller 411 within the target period. The charge discharge controller 31 is also configured to, when receiving the interrupt control instruction from the interrupt controller 412 within the target period, control the operation of the electrical energy storage 2 based on the second control instruction. The charge discharge control device 3 includes the charge discharge controller 31 and the interrupt controller 412.
[0073] The configuration enables the charge discharge controller 31 to continue charge discharge control of the storage battery 21 even when the target period of the plan control instruction ends with communication failure between the instruction control device 41 and the charge discharge control device 3 continuing for the constant time period or more.
[0074] Here, the situation of the customer facility may have precedence over the plan control instruction produced by an instructor controller (plan for charge discharge timing of storage battery 21). For example, when the charge discharge timing of the storage battery 21 is instructed by operation of a user of the customer facility, the interrupt controller 34 provides the charge discharge controller 31 with the interrupt control instruction based on the user’s instruction. In this case, the user’s instruction (interrupt control instruction) takes precedence over the plan control instruction, and the charge discharge controller 31 performs charge discharge control of the storage battery 21 in accordance with the user’s instruction. When generated output of photovoltaic modules 81 in a power generator 8 suddenly decreases, an interrupt controller 34 produces an interrupt control instruction to cause the storage battery 21 to discharge in order to balance between supply and demand of electric power in the detached house 6. In this case, even when the plan control instruction is an instruction to cause the storage battery 21 to charge, the charge discharge controller 31 causes the storage battery 21 to discharge. When the instruction from the instructor controller (plan control instruction and interrupt control instruction) is an instruction to cause the storage battery 21 to charge and discharge frequently repeatedly, unlike the instruction the interrupt controller 34 produces an instruction to cause the storage battery 21 not to charge and discharge frequently repeatedly, and provide the instruction to the charge discharge controller 31. It is accordingly possible to prevent the storage battery 21 from charging and discharging frequently repeatedly and suppress reduction in the life of the storage battery 21.
[0075] Thus, when an event requiring modification in operation instruction content of the electrical energy storage 2 represented by the plan control instruction (first control instruction) occurs, the interrupt controller 34 (second controller) provides the charge discharge control device 3 with the interrupt control instruction (second control instruction) based on the event. [0076] With the configuration, when an event requiring modification in the plan control instruction produced by the plan controller 411 occurs, charge discharge control of the storage battery 21 is performed based on the event and charge discharge timing of the storage battery 21 is further optimized. The charge discharge control device 3 performs processing containing as necessary information other than the plan control instruction from the instruction control device 41, thereby making it possible to split installation cost of the electrical energy storage 2 fifty-fifty between the customer and the electricity utility to reduce and divide the installation cost.
[0077] Here, the storage battery 21 or the electrical energy storage 2 may be exchanged due to degradation of the storage battery 21 in the electrical energy storage 2 or the like. Such a case requires re-examination of charge discharge control of the storage battery 21 before and after it is exchanged. [0078] Therefore, the charge discharge control device 3 includes an exchange determination unit 36 configured to determine whether or not the electrical energy storage 2 has been exchanged (also means only the storage battery 21 has been exchanged). The exchange determination unit 36 determines whether or not the electrical energy storage 2 has been exchanged based on identification information of the electrical energy storage 2. Examples of the identification information of the electrical energy storage 2 include a product code, a manufacturing number, a model number of storage battery 21, a connected state of storage battery 21, an identification number of storage battery 21, a total cell volume of storage battery 21, self-contained rated output power, maximum charge power, and maximum discharge power.
[0079] The identification information of the electrical energy storage 2 as a control object to be connected to the charge discharge control device 3 is stored in the storage device 32 in advance. The exchange determination unit 36 acquires the identification information of the electrical energy storage 2 by communication and compares the identification information acquired (called acquired identification information) with the identification information stored in the storage device 32 (called stored identification information). The exchange determination unit 36 determines whether or not the acquired identification information accords with the stored identification information and thereby determines whether or not the electrical energy storage 2 has been exchanged. When the acquired identification information accords with the stored identification information, the exchange determination unit 36 determines that the electrical energy storage 2 is not exchanged. On the other hand, when the acquired identification information does not accord with the stored identification information, the exchange determination unit 36 determines that the electrical energy storage 2 has been exchanged. The exchange determination unit 36 then notifies the interrupt controller 34 of a determination result representing whether or not the electrical energy storage 2 has been exchanged.
[0080] When the exchange determination unit 36 determines that the electrical energy storage 2 has been exchanged, the interrupt controller 34 provides the interrupt control instruction to the charge discharge controller 31. Examples of the interrupt control instruction in this case include “stand-by” in which neither charge nor discharge of the storage battery 21 is performed, and “automatic operation” in which the charge discharge control device 3 controls charge discharge of the storage battery 21 based on the state of the storage battery 21, the state of the supply and demand of electric power in the detached house 6 and the like.
[0081] Note that the electrical energy storage 2 according to the embodiments includes the power converter 22, but the power converter 22 may be provided separately from the electrical energy storage 2. The charge discharge controller 31 and the electrical energy storage 2 may be provided integrally in the same enclosure. That is, the charge discharge control device 3, the electrical energy storage 2 and the power converter 22 may have a single integral structure or each have their own discrete structures. For example, as shown in Figure 5, the power converter 22 may be provided integrally with the charge discharge control device 3 with the power converter 22 separated from the electrical energy storage 2. That is, the charge discharge control device 3 may further include the power converter 22 configured to cause the storage battery 21 to charge and discharge. The charge discharge controller 31 may be configured to control the power converter 22, thereby controlling the operation of the electrical energy storage 2. This enables the charge discharge control device 3 to also function as a power conversion device configured to perform charge and discharge of the storage battery 21. In other words, the power conversion device may include the power converter 22 and the charge discharge controller 31. The power conversion device integrally includes the power converter 22 configured to perform charge and discharge of the storage battery 21, and the charge discharge controller 31 configured to control the power converter 22 based on the plan control instruction or the interrupt control instruction, thereby controlling charge discharge of the storage battery 21. The power conversion device is therefore able to improve responsiveness from receipt of a request for power adjustment (DR request) to start of charge discharge control of the storage battery 21. [0082] Note that the abovementioned embodiments are merely examples. Therefore, the present invention is not limited to the embodiments, but various modifications may be made according to design and the like despite the embodiments as long as they fall within the true scope of technical ideas according to the present invention.
Reference Signs List [0083]
1, 1A Charge discharge control system
Electrical energy storage
Storage battery
Charge discharge control device
Charge discharge controller
Interrupt controller (second controller)
Instruction control device
411 Plan controller (First controller)
412 Interrupt controller (Second controller)
Detached house (customer facility)

Claims (13)

1. A charge discharge control system, configured to control an electrical energy storage having a storage battery and allowed to be installed in a customer facility, comprising:
a charge discharge controller configured to control operation of the electrical energy storage!
a first controller configured to provide the charge discharge controller with a first control instruction representing operation instruction content with respect to the electrical energy storage during a target period! and a second controller configured to provide the charge discharge controller with a second control instruction representing operation instruction content with respect to the electrical energy storage, wherein the charge discharge controller is configured to control the operation of the electrical energy storage based on the first control instruction received from the first controller within the target period, and the charge discharge controller is also configured to, when receiving the second control instruction from the second controller within the target period, control the operation of the electrical energy storage based on the second control instruction.
2. The charge discharge control system of claim 1, wherein the first controller is configured to provide the charge discharge controller with the first control instruction at predetermined intervals, each shorter than the target period, and the charge discharge controller is configured to control the operation of the electrical energy storage based on a latest first control instruction.
3. The charge discharge control system of claim 2, wherein the charge discharge controller is configured to, when failing to receive a first control instruction to be received, control the operation of the electrical energy storage based on a previous first control instruction.
4. A charge discharge control system of any one of claims 1 to 3, wherein the second controller is configured to, when an event occurs, provide the charge discharge controller with the second control instruction based on the event, the event causing the operation instruction content of the electrical energy storage represented by the first control instruction to need to be modified.
5. A charge discharge control system of any one of claims 1 to 4, wherein the second controller is configured to provide the charge discharge controller with the second control instruction when an electricity purchase price exceeds a threshold.
6. A charge discharge control system of any one of claims 1 to 5, wherein the second controller is configured to provide the charge discharge controller with the second control instruction at end of the target period of the first control instruction received with the charge discharge controller, and the charge discharge controller is configured to control the operation of the electrical energy storage in accordance with the second control instruction.
7. An instruction control device, in a charge discharge control system of any one of claims 1 to 6, comprising the first controller.
8. An instruction control device, in a charge discharge control system of any one of claims 1 to 5, comprising the first controller and the second controller.
9. A charge discharge control device, in a charge discharge control system of any one of claims 1 to 6, comprising the charge discharge controller.
10. The charge discharge control device of claim 9, further comprising the second controller.
11. A charge discharge control device of either claim 9 or 10, further comprising a power converter configured to cause the storage battery to charge and discharge, wherein the charge discharge controller is configured to control the operation of 5 the electrical energy storage by controlling the power converter.
12. A charge discharge control method, comprising controlling an electrical energy storage having a storage battery and allowed to be installed in a customer facility, the charge discharge control method comprising:
10 controlling operation of the electrical energy storage based on a first control instruction representing operation instruction content with respect to the electrical energy storage during a target period; and when there is a second control instruction representing operation instruction content with respect to the electrical energy storage within the
15 target period, controlling the operation of the electrical energy storage based on the second control instruction.
13. A program, for controlling an electrical energy storage having a storage battery and allowed to be installed in a customer facility,
20 wherein the program is provided for causing a computer to function as a charge discharge controller configured to control operation of the electrical energy storage based on a first control instruction representing operation instruction content with respect to the electrical energy storage during a target period, and
25 when there is a second control instruction representing operation instruction content with respect to the electrical energy storage within the target period, control the operation of the electrical energy storage based on the second control instruction.
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AU2016306224A 2015-08-07 2016-07-27 Electricity storage control system, instruction control system, electricity storage control device, electricity storage control method, and program Abandoned AU2016306224A1 (en)

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