AU2017263912B2

AU2017263912B2 - Charge/discharge planning system, planning method, and program

Info

Publication number: AU2017263912B2
Application number: AU2017263912A
Authority: AU
Inventors: Sihan Dong; Kenichi Watanabe
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2016-05-12
Filing date: 2017-04-18
Publication date: 2020-05-14
Anticipated expiration: 2037-04-18
Also published as: AU2017263912A1; WO2017195537A1; DE112017002408T5; JP6583805B2; JPWO2017195537A1

Abstract

A charge/discharge planning system (10) equipped with: a storage battery information acquisition unit (110) that acquires storage battery information specifying a storage battery state schedule (charge/discharge schedule) indicating the remaining capacity of a storage battery (210) for each consumer (20) in a group of consumers; an overall charge/discharge planning unit (150) that, on the basis of the storage battery information, determines a target value for an overall storage battery state which should be changed by charging/discharging, for each unit amount of time in the next 24 hours, for example, and formulates an overall charge/discharge plan; and an output unit (170) that outputs information that is based on the overall charge/discharge plan.

Description

CHARGE AND DISCHARGE PLANNING SYSTEM, PLANNING METHOD,

AND PROGRAM

TECHNICAL FIELD [0001]

The present invention relates to a charge and discharge planning system, and a planning method and a program which are used by the charge and discharge planning system.

BACKGROUND ART [0002]

A method is known, which defines an evaluation function that evaluates a charge and discharge schedule of storage battery units, individually determines a charge and discharge schedule for each of the storage battery units based on the defined evaluation function, and sends a charge and discharge command value according to the charge and discharge schedule to each storage battery unit (see PTL 1).

Citation List

Patent Literature [0003]

PTL 1: Japanese Unexamined Patent Application Publication No. 2012-205490

SUMMARY OF THE INVENTION

TECHNICAL PROBLEM [0004]

With the technique described in PTL 1, charge and discharge of each storage battery can be managed according to an intended use, however, a

12077808_2 (GHMatters) P109904.AU method of formulating an optimal charge and discharge planning for both a set of consumers (consumer group) and each consumer is not disclosed. For instance, in an apartment (collective housing) in which a storage battery is installed in each exclusive element, both energy cost reduction for the entire apartment (collective housing) and energy cost reduction for each exclusive element cannot be achieved by the technique described in PTL 1.

[0005]

It is an advantage of the present invention to provide a charge and discharge planning system that formulates an appropriate charge and discharge planning that controls charge and discharge of a storage battery of each consumer in order to enable appropriate electric power utilization for both a set of consumers (consumer group) and each consumer. Here, a set of consumers (consumer group) is a set of multiple consumers, and is for instance, a consumer group (exclusive element group) in an apartment (collective housing), or a consumer group in an area.

In addition, the present invention advantageously provides a planning method and a program used by the charge and discharge planning system.

SOLUTION TO PROBLEM [0006]

In order to achieve the above-mentioned advantages, a charge and discharge planning system according to an aspect of the present invention includes: a charge and discharge planning system including: a storage battery information obtaining unit configured to, for each consumer of a consumer group, obtain storage battery information that predicts a storage battery state indicating electric energy stored in a storage battery included in a power storage device installed at each consumer every lapse of a unit time in a future predetermined period; an overall charge and discharge planning unit

12077808_2 (GHMatters) P109904.AU configured to determine a target value of an overall storage battery state to be changed by charging/discharging every lapse of the unit time in the predetermined period based on the storage battery information obtained by the storage battery information obtaining unit; and an output unit configured to output information to each consumer based on the target value, determined by the overall charge and discharge planning unit, of the overall storage battery state every lapse of the unit time in the predetermined period, to cause the power storage device installed at each consumer to charge and discharge the storage battery based on the information that has been output to the consumer. [0007]

In order to achieve the above-mentioned advantages, a charge and discharge planning system according to an aspect of the present invention includes: a charge and discharge planning device that transmits charge and discharge planning information for causing a power storage device including a storage battery to charge and discharge the storage battery, the power storage device being provided to each consumer of a consumer group. The charge and discharge planning device includes: a storage battery information obtaining unit that, for each consumer of the consumer group, obtains storage battery information which predicts a storage battery state indicating an electric energy stored in the storage battery of the power storage device provided in the consumer every lapse of a unit time in a future predetermined period; an overall charge and discharge planning unit that calculates an overall storage battery state showing a sum of electric energy indicated by a storage battery state related to each consumer of the consumer group for the unit time, every lapse of the unit time in the predetermined period based on the storage battery information obtained by storage battery information obtaining unit, and determine a target value of the overall storage battery state to be changed by

12077808_2 (GHMatters) P109904.AU charge and discharge every lapse of the unit time so that a cumulative evaluation value which is an accumulated sum of an evaluation value during the predetermined period according to the overall storage battery state when the overall storage battery state is changed by the charge and discharge every lapse of the unit time meets a predetermined criterion! an individual charge and discharge planning unit that determines a target value of the storage battery state related to each consumer of the consumer group every lapse of the unit time in the predetermined period, based on the target value, determined by the overall charge and discharge planning unit, of the overall storage battery state every lapse of the unit time in the predetermined period! and a transmission unit that transmits individual charge and discharge planning to the power storage device of each consumer of the consumer group, the individual charge and discharge planning indicating a target value, determined by the individual charge and discharge planning unit, of the storage battery state related to the consumer every lapse of the unit time in the predetermined period, to cause the power storage device installed at each consumer to charge and discharge the storage battery based on the information that has been output to the consumer.

[0008]

In order to achieve the above-mentioned advantages, a planning method according to an aspect of the present invention includes: for each consumer of a consumer group, obtaining storage battery information which predicts a storage battery state indicating electric energy stored in a storage battery included in a power storage device installed at each consumer every lapse of a unit time in a future predetermined period! determining a target value of an overall storage battery state to be changed by charging and discharging every lapse of the unit time in the predetermined period based on

12077808_2 (GHMatters) P109904.AU the storage battery information obtained in the obtaining, the overall storage battery state being a total of electric energy indicated by the storage battery state related to each consumer of the consumer group in the unit period; and outputting information to each consumer based on the target value of the overall storage battery state every lapse of the unit time in the predetermined period, to cause the power storage device installed at each consumer to charge and discharge the storage battery based on the information that has been output to the consumer.

[0009]

In order to achieve the above-mentioned advantages, a program according to an aspect of the present invention is for causing a computer to execute predetermined planning processing including: for each consumer of a consumer group, obtaining storage battery information which predicts a storage battery state indicating electric energy stored in a storage battery included in a power storage device installed at each consumer every lapse of a unit time in a future predetermined period; determining a target value of an overall storage battery state to be changed by charging and discharging every lapse of the unit time in the predetermined period based on the storage battery information obtained in the obtaining, the overall storage battery state being a total of electric energy indicated by the storage battery state related to each consumer of the consumer group in the unit period; and outputting information based to each consumer on the target value of the overall storage battery state every lapse of the unit time in the predetermined period, to cause the power storage device installed at each consumer to charge and discharge the storage battery based on the information that has been output to the consumer.

ADVANTAGEOUS EFFECTS OF INVENTION [0010]

12077808_2 (GHMatters) P109904.AU

According to the present invention, a target value of an overall storage battery state, which integrates the storage battery states of the storage batteries of individual consumers, is determined, in other words, charge and discharge planning for a set of a consumers (consumer group) is formulated. In addition, the formulated charge and discharge planning is distributed to the storage battery of each consumer as necessary and charge and discharge of the storage battery is controlled, thereby achieving appropriate electric power utilization for the consumer group.

BRIEF DESCRIPTION OF DRAWINGS [0011]

FIG. 1 is a diagram illustrating the schematic configuration of a charge and discharge planning system according to Embodiment 1.

FIG. 2 is a functional block diagram of a charge and discharge planning device.

FIG. 3 is a table illustrating an example of storage battery information.

FIG. 4 is a table illustrating an example of received electric power information.

FIG. 5 is a functional block diagram of a power storage device.

FIG. 6 is a flowchart illustrating an example of planning processing performed by the charge and discharge planning device.

FIG. 7 is a graph illustrating a predicted amount of electric energy to be received

FIG. 8 is a conceptual graph showing worth of an overall storage battery state for each of periods of time.

FIG. 9 is a table illustrating the detail of control related to charge and discharge performed by a control unit of the power storage device.

12077808_2 (GHMatters) P109904.AU

FIG. 10 is a diagram illustrating the schematic configuration of a charge and discharge planning system according to Embodiment 2.

DESCRIPTION OF EXEMPLARY EMBODIMENTS [0012] (EMBODIMENT 1)

Hereinafter, embodiments will be described with reference to the drawings. Each of the embodiments presented here shows a specific example of the present invention. Thus, the numerical values, shapes, materials, components, arrangement positions and connection configurations of the components, steps (processes), the order of the steps shown in the following embodiments each provide an example, and are not intended to limit the present invention. Among the components in the following embodiments, those components that are not stated in the independent claim are components that can be added arbitrarily. It should be noted that the respective figures are schematic diagrams and are not necessarily precise illustrations.

[0013]

Hereinafter, a charge and discharge planning system according to an embodiment of the present invention will be described.

[0014] (CONFIGURATION)

FIG. 1 is a diagram illustrating the schematic configuration of charge and discharge planning system 10 according to this embodiment.

[0015]

Charge and discharge planning system 10 is a system that formulates charge and discharge planning for appropriately charging/discharging the storage battery installed at each consumer. Charge and discharge planning system 10 formulates charge and discharge planning to enable economical

12077808_2 (GHMatters) P109904.AU electric power utilization for a consumer group and an individual consumer, for instance. Charge and discharge of each storage battery is performed based on the formulated charge and discharge planning. It should be noted that charge and discharge are collectively expressed by charge and discharge.

[0016]

As illustrated in FIG. 1. charge and discharge planning system 10 includes charge and discharge planning device 100, and power storage devices 200 of multiple consumers 20. Consumers 20 can be geographically apart from each other. In other words, consumers 20 can be connected to different power distribution lines 11. In the charge and discharge planning system 10, the number of consumers 20 in a consumer group for whom charge and discharge planning is to be formulated is not particularly limited, and may be, for instance, several tens, several hundreds, or several thousands.

[0017]

Each of multiple consumers 20 receives and utilizes electric power from power distribution line 11 of an electric power system or the like. The electric power supplied from power distribution line 11 is passed through electric power receiving point 21, and is consumed by load 30 in consumer 20. Load 30 includes various electrical appliances which use electric power, and for instance, a lighting device, an air-conditioning apparatus, a television receiver, a refrigerator, an induction cooker, or a charging device of an electric vehicle. It should be noted that consumer 20 may be provided with an electric power generation devices such as a solar power generation device (not illustrated). [0018]

Power storage device 200 provided to each consumer 20 includes, for instance, storage battery 210 such as a nickel hydride storage battery, a lithium ion storage battery, and includes, a control circuit, PCS (Power Conditioning

12077808_2 (GHMatters) P109904.AU

System) for controlling charge and discharge of storage battery 210. The detail of power storage device 200 will be described later.

[0019]

Power storage device 200 can communicate with charge and discharge planning device 100 via wired or wireless communication path 12. It should be note that EMS (Energy Management System) (not illustrated) may be installed in consumer 20, and communication between power storage device 200 and charge and discharge planning device 100 may be performed via the EMS. Alternatively, power storage device 200 may have a user interface that receives an setting operation related to control of charge and discharge of storage battery 210. The EMS may have a user interface that receives a user operation and controls power storage device 200.

[0020]

Power storage device 200 has a function to obtaining the electric power to be received (specifically, the electric power or the electric energy related to the electric power received by consumer 20 at electric power receiving point 21) at electric power receiving point 21. It should be noted that power storage device 200 may measure the electric power to be received by itself, or may obtain the electric power to be received measured by a measurement device separately installed (not illustrated). A measurement device which measures the electric power to be received at electric power receiving point 21 is, for instance, a measurement device installed near a master breaker connected to an electric power system of a power distribution board. When an electric power generation device is provided in consumer 20, a surplus electric power in consumer 20 may cause a reverse power flow to occur from electric power receiving point 21 to the side of power distribution line 11, and the electric energy measured then as the electric power to be received by the measurement

12077808_2 (GHMatters) P109904.AU device shall take a negative value. In short, a power flow shall be positive and a reverse power flow shall be negative. A measurement device which measures the electric power to be received at electric power receiving point 21 may measure the electric power to be received, for instance, by adding together a measurement value of each current sensor installed for every branch circuit of the power distribution board. Alternatively, a measurement device which measures the electric power to be received at electric power receiving point 21 may be an electric energy meter (smart meter) for meter reading that measures the electric energy used by consumer 20 as an electricity rate to be charged, for instance, on the side of an electric power system from the power distribution board. The smart meter has a communication function by which remote meter reading is performed by an electric power provider or the like. It should be noted that power storage device 200 may include the function of EMS that performs energy management such as control of the electric power used by electrical appliances in consumer 20 and utilization (for instance, display) of measurement results of the electric energy. Charge and discharge planning device 100 is an information processing device (computer) that communicates with each power storage device 200 and has a function of formulating charge and discharge planning. Charge and discharge planning device 100 can be operated by, for instance, an electric power provider, a demand response (DR) aggregator that adjust demand for electric power. Charge and discharge planning device 100 may have a display device (display) and an input device (such as a keyboard) as user interfaces. Alternatively, charge and discharge planning device 100 may communicate with an external terminal device using a communication interface, and thereby may utilize the terminal device as the user interfaces (a display device and an input device) of charge and discharge planning device 100.

12077808_2 (GHMatters) P109904.AU [0021]

Hereinafter, a specific configuration of charge and discharge planning device 100 will be described.

[0022]

FIG. 2 is a functional block diagram of charge and discharge planning device 100. It should be noted that power storage device 200 in each consumer 20 is illustrated.

[0023]

In order to implement a function of formulating charge and discharge planning based on information received from each power storage device 200, charge and discharge planning device 100 includes storage battery information obtaining unit 110, received electric power information obtaining unit 120, prediction unit 130, electricity rate information obtaining unit 140, overall charge and discharge planning unit 150, individual charge and discharge planning unit 160, and output unit 170 as illustrated in FIG. 2.

[0024]

Storage battery information obtaining unit 110 receives storage battery information transmitted from power storage device 200 (or the EMS) of each consumer 20, thereby having a function of obtaining the storage battery information. Here, the storage battery information obtained by storage battery information obtaining unit 110 includes an individual storage battery state that indicates the remaining capacity (scheduled value) of each storage battery 210 every unit time (for instance, 30 minutes) in at least predetermined period in the near future (for instance, from the present to 24 hours in the future). Since a storage battery state at the subsequent unit time is determined by the amount of charge and discharge and the storage battery state of storage battery 210 per unit time based on the initial state of storage

12077808_2 (GHMatters) P109904.AU battery 210, the individual storage battery state included in the storage battery information may be a schedule for charge and discharge every unit time in a predetermined period in the near future.

[0025]

Storage battery information obtaining unit 110 repeatedly obtains the storage battery information every unit time. The storage battery information may have contents different with every consumer 20 because scheduled use of power storage device 200 varies with every consumer 20. For instance, as illustrated in FIG. 3, the storage battery information may include an operation schedule that sets the remaining capacity (scheduled value) of storage battery 210 at times in the near future. Also, as described above, the storage battery information may include information indicating the amount of charge and discharge for changing the remaining capacity every unit time in the near future. The amount of charge and discharge refers to the amount of charge and the amount of discharge, and the amount of charge is shown, for instance by a positive value, and the amount of discharge is shown, for instance by a negative value. Furthermore, storage battery information may include information indicating the detail of control of charge and discharge, such as charging, discharging storage battery 210 every unit time in the near future, or no charging and discharging is performed on storage battery 210. The operation schedule of FIG. 3 shows that an operation is scheduled in which control of charge and discharge of storage battery 210 is performed by power storage device 200 to secure 50% remaining capacity at 10^30, for instance. In FIG. 3, for the sake of convenience, the remaining capacity is expressed by the ratio (%) of the electric energy stored to the capacity of storage battery 210. However, the remaining capacity may be expressed by the electric energy (Wh). Hereinafter, for the sake of simplification, units of the remaining capacity are

12077808_2 (GHMatters) P109904.AU not distinguished except when necessary. It should be noted that the storage battery information may include information indicating the capacity of storage battery 210 or information indicating the degree of deterioration (for instance, the ratio of a substantial capacity decreased due to deterioration with respect to the rated capacity) of storage battery 210.

[0026]

Received electric power information obtaining unit 120 has a function of obtaining received electric power information that indicates measurement results related to the received electric power of a consumer group. Power storage device 200 (or the EMS, the smart meter) of each consumer 20 transmits the received electric power information every certain time, and received electric power information obtaining unit 120 receives the received power information. The received electric power information includes at least the electric power (kW) or the electric energy (kWh) received by consumer 20 from power distribution line 11. For instance, as illustrated in FIG. 4, the received electric power information shows electric energy (Wh) in association with the date and time, the electric energy being a measurement result at electric power receiving point 21 every period of a unit time (for instance, 30 minutes). Hereinafter, for the sake of simplification, units of the received electric power are not distinguished except when necessary.

[0027]

Prediction unit 130 has a function of predicting the total (the total amount of electric power received) of received electric power of a consumer group every unit time (for instance, 30 minutes) in a predetermined period in the near future (for instance, from the present to 24 hours in the future) based on the received electric power information obtained by received electric power information obtaining unit 120. It should be noted that after adding together

12077808_2 (GHMatters) P109904.AU the amount of received electric power of individual consumer, prediction unit 130 may predict the total amount of electric energy to be received, or may predict the amount of received electric power of individual consumer, and may determine the total amount of electric energy to be received by adding together the amount of received electric power. Any method may be used for prediction. For instance, an auto-regression model, a multiple regression model, or a neural network may be used.

[0028]

Electricity rate information obtaining unit 140 has a function of obtaining electricity rate information that indicates the rate (electricity rate) related to received electric power of a consumer group. Basically, the electricity rate is consists of a basic rate and an electric energy rate. The basic rate refers to an electricity rate based on a minimum rate, a contract ampere, and a maximum value of an average amount of purchased electric power per unit time in the past one year. The electric energy rate is a rate according to the amount used, and is expressed by unit price rate per kWh. The electric energy rate may be difference between electricity purchasing and electricity selling, and may vary with season and period of time. Electricity rate information obtaining unit 140 obtains electricity rate information by receiving input of electricity rate information, for instance, by an operator, or by receiving electricity rate information from an external server apparatus (such as an electric power supplier) that provides information on electricity rate. For instance, when the detail of electricity rate information is updated due to revision or the like of electricity rate, electricity rate information obtaining unit 140 obtains the electricity rate information after updated.

[0029]

Overall charge and discharge planning unit 150 has a function of

12077808_2 (GHMatters) P109904.AU formulating charge and discharge planning (overall charge and discharge planning) for the entire storage batteries of a consumer group. In order to formulate overall charge and discharge planning, overall charge and discharge planning unit 150 calculates an overall storage battery state every unit time in a predetermined period in the near future based on the storage battery information. When the storage batteries in a consumer group are presumed to be a virtual large size storage battery, the overall storage battery state indicates the remaining capacity of the virtual large size storage battery. When the unit of the remaining capacity of each storage battery 210 is Wh, the overall storage battery state gives the total value of the remaining capacity. In contrast, when the unit of the remaining capacity is %, the overall storage battery state gives Σ {(the remaining capacity of storage battery 210)x (the rated capacity of storage battery 210)} I Σ (the rated capacity of storage battery 210)xl00. The predetermined period in the near future is, for instance, the period from the present to 24 hours in the future. The unit time is 30 minutes, for instance.

[0030]

Overall charge and discharge planning unit 150 formulates overall charge and discharge planning in a predetermined period from the present based on the electricity rate information obtained by electricity rate information obtaining unit 140, a predicted value for the amount of received electric power of a consumer group predicted by prediction unit 130, and the storage battery information obtained by storage battery information obtaining unit 110 in order to maximize the short term economic value such as electricity rate reduction achieved by a state of the storage battery. Overall charge and discharge planning unit 150 determines the amount of charge and discharge that maximizes the total value of profit represented by (Expression 2) based on

12077808_2 (GHMatters) P109904.AU the initial state of the storage battery and the equation of state represented by (Expression 1).

[0031]

S t+i = F (St, ut) ... (Expression 1) [0032]

Σ?=ιRt($t >^ut) ...(Expression 2) [0033] (Expression 1) is an equation of state that determines state St+i at unit time t+1 from state St at a unit time t and the amount of charge and discharge ut. When the unit of state is % in (Expression 1), F(St, ut) = St ut/(rated capacity), and when the unit of S is Wh, F(St, ut) = St - ut (when discharge corresponds to positive). (Expression 2) is an expression to determine the total value of profit up to unit time T (for instance, T = 48) in state St in a predetermined time and profit function Rt is determined based on the electricity rate and the like. An overall storage battery state corresponding to the determined amount of charge and discharge gives the overall charge and discharge planning. Here, power storage device 200 of consumer 20 is to be controlled, thus when overall charge and discharge planning is formulated, storage battery information on power storage device 200 of each consumer 20 needs to be considered, and (Expression 1) and (expression 2) need to be solved for the number of power storage devices 200. Thus, the storage battery information on each power storage device 200 is taken into consideration by increasing or decreasing the profit given by (Expression 2). Power storage devices 200 are bundled to virtually create one storage battery (hereinafter referred to as virtual large size storage battery), thus once (Expression 1) and (Expression 2) are solved, charge and discharge planning can be formulated. [0034]

12077808_2 (GHMatters) P109904.AU

Individual charge and discharge planning unit 160 has a function of formulating individual charge and discharge planning of storage battery 210 of individual consumer 20 based on the overall charge and discharge planning formulated by overall charge and discharge planning unit 150, and the storage battery information. The overall charge and discharge planning shows a target of charge and discharge for a virtual large size storage battery of a consumer group, whereas the individual charge and discharge planning is obtained by distributing the overall charge and discharge planning for the virtual large size storage battery to charge and discharge planning for individual storage battery 210.

[0035]

Individual charge and discharge planning unit 160 determines a target value of the storage battery state (the remaining capacity) of storage battery 210 in each consumer 20 every unit time in a predetermined period based on the overall charge and discharge planning. Consequently, individual charge and discharge planning, which shows a target value of the storage battery state of storage battery 210 every unit time in a predetermined period, is formulated. Individual charge and discharge planning unit 160 determines a target value in accordance with the storage battery information on each storage battery 210. For instance, for individual charge and discharge planning for storage battery 210 that transmits the storage battery information in FIG. 3, a target value is determined in accordance with <10^30, 50%>, <11Ό0, 10%>. For instance, when two storage batteries 210 are present: one transmits the storage battery information of FIG. 3, and the other transmits storage battery information indicating no schedule (no desire) for the period of time corresponding to the storage battery information of FIG. 3, the individual charge and discharge planning for the former of storage batteries 210 is <10^30, 50%> and <11Ό0,

12077808_2 (GHMatters) P109904.AU

10%>, and the individual charge and discharge planning for the latter of storage batteries 210 is <10^30, the value obtained by removing the individual charge and discharge planning 50% for the former of storage batteries 210 from the overall charge and discharge planning>, <11Ό0, the value obtained by removing the individual charge and discharge planning 10% for the former of storage batteries 210 from the overall charge and discharge planning>.

[0036]

Output unit 170 has a function of outputting information based the overall charge and discharge planning (the determined target value of overall storage battery state every unit time in a predetermined period) formulated by overall charge and discharge planning unit 150, and includes transmission unit 180. Output unit 170 outputs at least overall charge and discharge planning or individual charge and discharge planning. Output unit 170 may be implemented by display device or the like as a user interface, for instance, and may display overall charge and discharge planning or individual charge and discharge planning.

[0037]

The output of information by output unit 170 may be achieved by various methods such as output by transmission, display, and voice. Transmission unit 180 has a function of transmitting at least the individual charge and discharge planning formulated by individual charge and discharge planning unit 160 to power storage device 200 installed in each consumer 20 of a consumer group. It should be noted that output unit 170 is an option and only need to include transmission unit 180.

[0038]

Hereinafter, a specific configuration example of power storage device 200 will be described.

12077808_2 (GHMatters) P109904.AU [0039]

FIG. 5 is a functional block diagram of power storage device 200. As illustrated in FIG. 5, power storage device 200 includes storage battery 210, received electric power information obtaining unit 220, information notification unit 230, charge and discharge planning obtaining unit 240, and control unit

250.

[0040]

Received electric power information obtaining unit 220 has functions of obtaining received electric power information at electric power receiving point 21 as needed, and of conveying the received electric power information to control unit 250.

[0041]

Information notification unit 230 has a function of notifying (that is, transmitting) charge and discharge planning device 100 of information obtained by consumer 20 (specifically, storage battery information and received electric power information related to storage battery 210) via communication path 12.

[0042]

Charge and discharge planning obtaining unit 240 has functions of receiving and obtaining individual charge and discharge planning transmitted from charge and discharge planning device 100 via communication path 12, and of conveying the individual charge and discharge planning to control unit 250. [0043]

Control unit 250 has a function of controlling charge and discharge of storage battery 210 based on the individual charge and discharge planning obtained by charge and discharge planning obtaining unit 240. It should be noted that control unit 250 can adjust the detail of control of charge and

12077808_2 (GHMatters) P109904.AU discharge based on, for instance, the received electric power information obtained by received electric power information obtaining unit 220, and setting operation for charge and discharge performed via a user interface. Also control unit 250 has a function of managing various types of information on storage battery 210, such as a storage battery state (remaining capacity), a degree of deterioration, and an operation schedule showing scheduled control of charge and discharge of storage battery 210. In addition, control unit 250 has a function of controlling information notification unit 230 so that storage battery information including an operation schedule for storage battery 210, and received electric power information are transmitted to charge and discharge planning device 100.

[0044] (OPERATION)

Hereinafter, an operation example of charge and discharge planning system 10 in the above-described configuration will be described focused on the operation of charge and discharge planning device 100.

[0045]

FIG. 6 is a flowchart illustrating an example of planning processing performed by charge and discharge planning device 100. Hereinafter, the planning processing will be described with reference to FIG. 6. Here, the planning processing will be described using an example of formulating charge and discharge planning which shows target of charge and discharge every unit time of 30 minutes in a predetermined period from the present to 24 hours in the future.

[0046]

Charge and discharge planning device 100 obtains electricity rate information by electricity rate information obtaining unit 140 (step Sil, Si2).

12077808_2 (GHMatters) P109904.AU

For the first time or each time when the detail of electricity rate information is updated due to change or the like of an electricity rate system, charge and discharge planning device 100 obtains the electricity rate information after updated.

[0047]

Charge and discharge planning device 100 obtains received electric power information from power storage device 200 of each consumer 20 by received electric power information obtaining unit 120 (step S13).

[0048]

Subsequently, prediction unit 130 of charge and discharge planning device 100 predicts the total amount of electric energy to be received of a consumer group in a predetermined period based on the received electric power information obtained by received electric power information obtaining unit 120 (step Si4).

[0049]

In addition, charge and discharge planning device 100 obtains storage battery information from power storage device 200 of each consumer 20 by storage battery information obtaining unit 110 (step S15). It should be noted that step S13 and step Si4, and step S15 can be performed at the same time, thus it is not necessary to perform the steps in series.

[0050]

Subsequently, overall charge and discharge planning unit 150 of charge and discharge planning device 100 calculates an overall storage battery state every unit time in a predetermined period based on the storage battery information obtained by storage battery information obtaining unit 110 (step S16). The calculating method is as described above.

[0051]

12077808_2 (GHMatters) P109904.AU

Subsequently, overall charge and discharge planning unit 150 formulates overall charge and discharge planning in a predetermined period from the present based on the electricity rate information obtained by electricity rate information obtaining unit 140, a predicted value for the amount of received electric power of a consumer group predicted by prediction unit 130, and the storage battery information obtained by storage battery information obtaining unit 110 in order to maximize the short term economic value such as electricity rate reduction achieved by a state of the storage battery (step Si7).

[0052]

An example of a calculation method of (Expression 2) will be described, in which the basic rate is reduced by performing peak shift using storage batteries in an apartment (collective housing) where high-pressure bulk receiving is provided. FIG. 7 is a graph illustrating predicted values of the total amount of power received at an electric power receiving point in an apartment (collective housing). The horizontal axis indicates time and the vertical axis indicates electric energy as the total amount of electric energy received. In the example of FIG. 7, predicted total amount of electric energy to be received G1 exceeds target total amount of electric energy to be received Pt in the demand period corresponding to time Ta to time Tb. When discharge of the storage battery is not performed in the demand period, the following electricity rate is charged: {(predicted amount of electric energy to be received Gl) (target total amount of electric energy to be received Pt)} x (basic rate unit price) x 12 months. Thus, overall charge and discharge planning unit 150 sets a larger value of profit function Rt for a higher overall storage battery state St in the demand period corresponding to time Ta to time Tb. FIG. 8 is a conceptual graph showing the value of profit function Rt every period of time

12077808_2 (GHMatters) P109904.AU (demand periods tl to tlO). Demand periods t2 to t7 of FIG. 8 correspond to time Ta to time Tb of FIG. 7. in FIG. 8, for the sake of description, a portion with a larger value of profit function Rt is filled with a dark pattern, and a portion with a smaller value of profit function Rt is filled with a light pattern correspondingly to St in each demand period. In FIG. 8, the worth for each overall storage battery state is set correspondingly to the relationship between predicted amount of electric energy to be received G1 and target total amount of electric energy to be received Pt of FIG. 7. During time Ta to time Tb of FIG. 7, predicted amount of electric energy to be received G1 exceeds, for instance, target total amount of electric energy to be received Pt as the upper limit target based on the maximum value of the total amount of electric energy to be received in the past 12 months. In order to supply the exceeded amount of electric power by storage batteries, a larger value of profit function Rt is set for a higher St in demand periods t2 to t7 of FIG. 8. FIG. 8 illustrates overall charge and discharge planning G2 every period of time, which is determined based on the worth for the overall storage battery state. In the example illustrated in FIG. 7 and FIG. 8, overall charge and discharge planning unit 150 sets profit function Rt based on a target value of electric power using a result of comparison between predicted total amount of electric energy to be received G1 and target total amount of electric energy to be received Pt. In addition, for instance, when a reverse power flow is reduced, a larger value of profit function Rt may be set for a lower St. Also, profit function Rt may be set so that the worth is higher as predicted total amount of electric energy to be received G1 is closer to equivalent to the total amount of electric energy to be received set as a target in a specific period of time.

[0053]

Subsequently, individual charge and discharge planning unit 160

12077808_2 (GHMatters) P109904.AU formulates individual charge and discharge planning distributed to each consumer 20, based on the formulated overall charge and discharge planning (step Si8).

[0054]

Specifically, for each consumer 20, individual charge and discharge planning unit 160 refers to storage battery information obtained from power storage device 200 of consumer 20 based on the overall charge and discharge planning, and formulates individual charge and discharge planning for charge and discharge control of storage battery 210 of consumer 20.

[0055]

Charge and discharge planning device 100 then transmits charge and discharge planning information to power storage device 200 of each consumer 20 by transmission unit 180, the charge and discharge planning information indicating individual charge and discharge planning related to consumer 20 (step Si9). It should be noted that in addition to transmission in step Si9, an overall charge and discharge planning or each individual charge and discharge planning may be displayed on a display device in output unit 170.

[0056]

In power storage device 200 which has received charge and discharge planning information transmitted in step S19, control unit 250, to which charge and discharge planning information has been conveyed from charge and discharge planning obtaining unit 240, performs control of charge and discharge of storage battery 210 in consideration of the target value of the storage battery state according to individual charge and discharge planning. FIG. 9 illustrates an example of the detail of control of charge and discharge of storage battery 210 by control unit 250 (discharge corresponds to positive). The example of FIG. 9 is an example in which control unit 250 performs charge

12077808_2 (GHMatters) P109904.AU and discharge in accordance with individual charge and discharge planning in a range where a received electric power (predicted amount of electric energy to be received) in certain demand period t does not exceed the target value of electric power to be received (target amount of electric energy to be received ), the received electric power being predicted based on a result of measurement of received electric power at electric power receiving point 21, the result of measurement being obtained from received electric power information obtaining unit 220 in demand period t. As a target amount of electric energy to be received, for instance, the maximum electric power received in a certain period in the past may be set. In the example of FIG. 9, when the predicted amount of electric energy to be received is expected not to exceed the target value of electric power to be received (the lower row of the table of FIG. 9), control unit 250 charges or discharges storage battery 210 so that the current storage battery state (the current remaining capacity (Wh)) of storage battery 210 approaches the target remaining capacity. When the current remaining capacity is smaller than the target remaining capacity (Wh), storage battery 210 is charged, whereas when the current remaining capacity is larger than the target remaining capacity, storage battery 210 is discharged. Also, when the predicted amount of electric energy to be received is expected to exceed the target value of electric power to be received (the upper row of the table of FIG. 9), control unit 250 may discharge storage battery 210 in a range where the target amount of electric energy to be received is not exceeded generally.

[0057]

In this manner, charge and discharge planning system 10 formulates overall charge and discharge planning to enable economical electric power utilization for a consumer group which is a set of consumers 20. Also, individual charge and discharge planning is formulated so that the overall

12077808_2 (GHMatters) P109904.AU charge and discharge planning is distributed to the consumers. Consequently, charge and discharge of storage battery 210 of each consumer 20 may be performed to enable economical electric power utilization for the consumer group and individual consumer 20.

[0058] (EMBODIMENT 2)

Part of charge and discharge planning systems 10 described above may be modified to implement the system illustrated in FIG. 10.

[0059]

FIG. 10 is a diagram illustrating a schematic configuration of charge and discharge planning system 10a.

[0060]

Although charge and discharge planning system 10a is basically similar to (see FIG. 1) charge and discharge planning system 10, each consumer 20 is an exclusive element of an apartment (collective housing), or a house of a smart community, and includes electrical transformer equipment 700.

[0061]

Electrical transformer equipment 700 includes, for instance, electrical transformer 701, a meter, a breaker, a protective device, and a communication device. Electrical transformer equipment 700 is equipment that transforms electric power from an electric power system by electrical transformer 701, and supplies the electric power to each consumer 20 via power distribution line 11. Electrical transformation equipment 700 has a function of measuring received electric power at electric power receiving point 702. In addition, electrical transformation equipment 700 has a function of transmitting received electric power measured every certain period of time (for instance, 30 minutes) to charge and discharge planning device 100 every certain period of time via

12077808_2 (GHMatters) P109904.AU power distribution line 11.

[0062]

Received electric power information obtaining unit 120 (see FIG. 2) of charge and discharge planning device 100 obtains received electric power information not from power storage device 200 of consumer 20 but from electrical transformation equipment 700.

[0063]

It should be noted that points not specifically described here about charge and discharge planning system 10a are the same as in charge and discharge planning system 10. Consequently, charge and discharge planning device 100 in charge and discharge planning system 10a does not need to individually receive (for each consumer 20) the received electric power at electric power receiving point 21 in each consumer 20.

[0064] (OTHER EMBODIMENTS)

Although charge and discharge planning systems 10, 10a have been described with Embodiments 1, 2 above, the embodiments described above is only an example, and it goes without saying that various types of changes, additions, omissions are possible.

[0065]

In the embodiments described above, an example has been presented, in which overall charge and discharge planning unit 150 sets the value of the profit function which indicates the worth of an overall storage battery state every unit time based on the relationship between a predicted total amount of electric energy to be received and a target value of the total amount of electric energy to be received, an operation schedule for storage battery 210 in individual consumer 20, and an electricity rate. However, this is only an 27

12077808_2 (GHMatters) P109904.AU example, and overall charge and discharge planning unit 150 may set the value of the profit function based on various types of information obtainable from power storage device 200 of each consumer 20 or other devices.

[0066]

Although charge and discharge planning device 100 described above receives the received electric power information and the storage battery information from power storage device 200 of consumer 20, these pieces of information may be obtained by a method other than reception (for instance, reception from EMS) from power storage device 200.

[0067]

Also, the components of charge and discharge planning device 100 described above may be provided in one device included in the charge and discharge planning system or may be provided dispersedly over multiple devices included in the charge and discharge planning system.

[0068]

Also, the execution sequence of the steps of processing (for instance, the step of planning processing illustrated in FIG. 6) in charge and discharge planning systems 10, 10a described above is not necessarily limited to the sequence as described above. The execution sequence can be changed, multiple steps can be performed in parallel, or part of the steps can be omitted without departing from the essence of the invention. All or part of the planning processing may be implemented by a method other than the software for charge and discharge planning device 100. The processing by software is implemented by execution of a processor included in charge and discharge planning device 100. A program is recorded on a recording medium, and may be distributed or circulated. For instance, a distributed program is installed in a device (computer), and execution of a processor of the device can cause the

12077808_2 (GHMatters) P109904.AU device to perform all or part of the planning processing.

[0069]

In addition, an embodiment implemented by combining the components and the functions shown by the embodiments described above in any manner is also included in the scope of the present invention.

[0070]

It should be noted that general or specific embodiments include one or multiple combinations of a device, a system, a method, an integrated circuit, a computer program, and a computer-readable recording medium.

[0071]

Hereinafter, a charge and discharge planning device, a charge and discharge planning system, a planning method according to an aspect of the present invention, and the configuration of a program used by the charge and discharge planning device, modifications, and effects will be described.

[0072] (1) Charge and discharge planning systems 10, 10a according to an aspect of the present invention includes: storage battery information obtaining unit 110 that, for each consumer 20 of a consumer group (a set of consumers 20), obtains storage battery information which predicts a storage battery state indicating an electric energy (that is, the remaining capacity) stored in storage battery 210 of consumer 20 every lapse of a unit time (for instance, 30 minutes) in a future predetermined period (for instance from the present to 24 hour in the future); overall charge and discharge planning unit 150 that determines a target value of an overall storage battery state showing a sum of electric energy indicated by a storage battery state related to each consumer 20 of the consumer group for the unit time, every lapse of the unit time in the predetermined period based on the storage battery information obtained by

12077808_2 (GHMatters) P109904.AU storage battery information obtaining unit 110, the storage battery state being to be changed by charge and discharge! and output unit 170 that outputs information (that is, information related to charge and discharge planning) based on the target value of the overall storage battery state every lapse of the unit time in the predetermined period determined by overall charge and discharge planning unit 150.

[0073]

Consequently, charge and discharge planning systems 10, 10a can formulate appropriate charge and discharge planning for controlling charge and discharge of storage battery 210 of each consumer 20. With the above configuration, charge and discharge planning systems 10, 10a regard a set of storage batteries as a virtually one storage battery, the set integrating individual storage batteries 210 in consumers 20. Charge and discharge planning systems 10, 10a then determine a target value of an overall storage battery state showing the remaining capacity (that is, the sum of the remaining capacity of each storage battery 210) of the set every unit time (in other words, formulate overall charge and discharge planning which is an operation schedule for the set of the storage batteries). After the overall charge and discharge planning is formulated, the overall charge and discharge planning can be separately distributed to individual charge and discharge planning for storage battery 210 in individual consumer 20. Each of the overall charge and discharge planning and the individual charge and discharge planning is a type of charge and discharge planning which is used directly or indirectly for charge and discharge of a storage battery.

[0074] (2) For instance, overall charge and discharge planning unit 150 calculates the overall storage battery state for the unit time every lapse of the

12077808_2 (GHMatters) P109904.AU unit time in the predetermined period, and may determine the target value so that a cumulative evaluation value (for instance, see Expression 2 described above) which is an accumulated sum of an evaluation value (for instance, the value of a profit function) during the predetermined period according to the overall storage battery state when the overall storage battery state is changed by charge and discharge every lapse of the unit time meets a predetermined criterion (for instance, the cumulative evaluation value is to be maximized). [0075]

Consequently, a schedule (operation schedule) for the storage battery state of individual storage battery 210 can be reflected on the evaluation value as necessary. Thus, with the above configuration, it is not necessary to solve dynamic programming as many times as the total number of individual storage batteries 210. Also, part of various changes over time of the storage battery states of individual storage batteries 210 cancel each other, and is not reflected on the change over time in the overall storage battery state. Therefore, charge and discharge planning systems 10, 10a in the above configuration can efficiently formulate the charge and discharge planning.

[0076] (3) For instance, storage battery information obtaining unit 110 may obtain storage battery information by receiving the obtain storage battery information transmitted from each consumer 20 of the consumer group.

[0077]

Consequently, charge and discharge planning systems 10, 10a can quickly collect the storage battery information.

[0078] (4) For instance, the value of the profit function shows an economic value, and the predetermined criterion may be that the cumulative value is

12077808_2 (GHMatters) P109904.AU maximized.

[0079]

Consequently, it is possible to formulate useful charge and discharge planning that maximizes the economic value for overall storage batteries 210 of the consumer group in the predetermined period.

[0080] (5) For instance, charge and discharge planning systems 10, 10a further include: received electric power information obtaining unit 120 that obtains received electric power information which indicates a result of measurement related to received electric power of the consumer group! and prediction unit 130 that predicts received electric power of the consumer group every lapse of the unit time in the predetermined period based on the received electric power information. Overall charge and discharge planning unit 150 may set a value of the profit function according to the overall storage battery state when the overall storage battery state is changed by charge and discharge every lapse of the unit time, based on whether or not received electric power of the consumer group for the unit time predicted by prediction unit 130 meets a predetermined condition.

[0081]

Consequently, it is possible to formulate charge and discharge planning based on worth according to the relationship between the received electric power in the consumer group and the target.

[0082] (6) For instance, received electric power information obtaining unit 120 may obtain received electric power information by receiving the received electric power information from each consumer 20 of the consumer group, the received electric power information indicating a result of measurement related

12077808_2 (GHMatters) P109904.AU to the received electric power of consumer 20.

[0083]

Consequently, charge and discharge planning system 10 can quickly collect results of measurement of received electric power from consumers 20 who are dispersedly present. This is useful, for instance, when each consumer 20 of the consumer group lives in a single house (in other words, when results of measurement of received electric power may not be obtained collectively for the entire consumer group).

[0084] (7) For instance, the predetermined condition includes a condition that received electric power is greater than or equal to a predetermined lower limit, and when the received electric power predicted by prediction unit 130 meets the predetermined condition, overall charge and discharge planning unit 150 may set the evaluation value to be larger, as compared with when the predetermined condition is not met.

[0085]

Consequently, in a period of time when the received electric power of the consumer group is reduced to a lower limit (for instance, a value corresponding to a reverse power flow), for instance, each storage battery 210 leaves some space for storing electric power, and thus charge and discharge planning can be formulated so as to direct a power flow to suppress the reverse power flow.

[0086] (8) For instance, the predetermined condition includes a condition that received electric power is less than or equal to a predetermined upper limit, and overall charge and discharge planning unit 150 may identify the predetermined upper limit based on the received electric power information.

12077808_2 (GHMatters) P109904.AU [0087]

Consequently, charge and discharge planning can be formulated so as to direct a power flow to suppress the peak of the received electric power of the consumer group.

[0088] (9) For instance, charge and discharge planning systems 10, 10a further including electricity rate information obtaining unit 140 that obtains electricity rate information indicating a rate related to received electric power of the consumer group. Overall charge and discharge planning unit 150 may set a value of the profit function according to the overall storage battery state when the overall storage battery state is changed by charge and discharge every lapse of the unit time, based on the electricity rate information.

[0089]

Consequently, economical charge and discharge planning can be formulated in consideration of the electricity rate.

[0090] (10) For instance, overall charge and discharge planning unit 150 may set a value of the profit function according to the overall storage battery state when the overall storage battery state is changed by charge and discharge every lapse of the unit time, based on the storage battery information.

[0091]

Consequently, charge and discharge planning can be formulated in consideration of the worth of the overall storage battery state based on the schedule (operation schedule) for the storage battery state of individual storage battery 210.

[0092] (11) For instance, charge and discharge planning systems 10, 10a

12077808_2 (GHMatters) P109904.AU further including individual charge and discharge planning unit 160 that determines a target value of a storage battery state of storage battery 210 related to each consumer 20 of the consumer group every lapse of the unit time in the predetermined period, based on the target value of the overall storage battery state every lapse of the unit time in the predetermined period determined by overall charge and discharge planning unit 150. Output unit 170 may perform output related to charge and discharge planning by transmitting charge and discharge planning information to each consumer 20 of the consumer group, the charge and discharge planning information indicating the target value of the storage battery state of storage battery 210 related to consumer 20 every lapse of the unit time in the predetermined period, the target value being determined by individual charge and discharge planning unit 160.

[0093]

Consequently, each consumer 20 who has received charge and discharge planning information from charge and discharge planning systems 10, 10a can perform charge and discharge control of storage battery 210 in accordance with the target value of the storage battery state indicated by the charge and discharge planning information.

[0094] (12) A charge and discharge planning system according to an aspect of the present invention is charge and discharge planning systems 10, 10a including charge and discharge planning device 100 that transmits charge and discharge planning information for causing power storage device 200 including storage battery 210 to charge and discharge storage battery 210, power storage device 200 being provided to each consumer 20 of a consumer group, charge and discharge planning device 100 includes: storage battery information

12077808_2 (GHMatters) P109904.AU obtaining unit 110 that, for each consumer 20 of a consumer group, obtains storage battery information which predicts a storage battery state indicating an electric energy stored in storage battery 210 of power storage device 200 provided in consumer 20 every lapse of a unit time (for instance, 30 minutes) in a future predetermined period (for instance from the present to 24 hour in the future); overall charge and discharge planning unit 150 that calculates an overall storage battery state showing a sum of electric energy indicated by a storage battery state related to each consumer 20 of the consumer group for the unit time, every lapse of the unit time in the predetermined period based on the storage battery information obtained by storage battery information obtaining unit 110, and determine a target value of the overall storage battery state to be changed by charge and discharge every lapse of the unit time so that a cumulative evaluation value which is an accumulated sum of an evaluation value during the predetermined period according to the overall storage battery state when the overall storage battery state is changed by the charge and discharge every lapse of the unit time meets a predetermined criterion! individual charge and discharge planning unit 160 that determines a target value of a storage battery state of storage battery 210 related to each consumer 20 of the consumer group every lapse of the unit time in the predetermined period, based on the target value of the overall storage battery state every lapse of the unit time in the predetermined period determined by overall charge and discharge planning unit 150! and transmission unit 180 that transmits individual charge and discharge planning to power storage device 200 of each consumer 20 of the consumer group, the individual charge and discharge planning indicating a target value of the storage battery state of storage battery 210 related to the consumer every lapse of the unit time in the predetermined period, the target value being determined by individual charge

12077808_2 (GHMatters) P109904.AU and discharge planning unit 160.

[0095]

Consequently, appropriate charge and discharge planning for controlling charge and discharge of storage battery 210 of each consumer 20 can be formulated.

[0096] (13) A planning method according to an aspect of the present invention includes the steps of^; for each consumer 20 of a consumer group, obtaining (for instance, step Si5) storage battery information which predicts a storage battery state indicating an electric energy stored in storage battery 210 of consumer 20 every lapse of a unit time in a future predetermined period! and determining (for instance, step Si7) a target value of an overall storage battery state to be changed by charge and discharge every lapse of the unit time in the predetermined period based on the storage battery information obtained in the obtaining.

[0097]

[0098] (14) A program according to an aspect of the present invention is for causing a computer to execute predetermined planning processing (for instance, planning processing illustrated in FIG. 6) including: for each consumer 20 of a consumer group, obtaining (for instance, step Si5) storage battery information which predicts a storage battery state indicating an electric energy stored in storage battery 210 of consumer 20 every lapse of a unit time in a future predetermined period! and determining (for instance, step Si7) a target value

12077808_2 (GHMatters) P109904.AU of an overall storage battery state to be changed by charge and discharge every lapse of the unit time in the predetermined period based on the storage battery information obtained in the obtaining.

[0099]

When this program is installed in a device (computer) including a microprocessor, the device performs planning processing and can serve as charge and discharge planning device 100. Appropriate charge and discharge planning for controlling charge and discharge of storage battery 210 of each consumer 20 can be formulated by charge and discharge planning device 100. [0100]

In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.

[00101]

It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.

REFERENCE MARKS IN THE DRAWINGS [0102]

10, 10a charge and discharge planning system consumer

100 charge and discharge planning device

12077808_2 (GHMatters) P109904.AU

110	storage battery information obtaining unit
120	received electric power information obtaining unit
130	prediction unit
140	electricity rate information obtaining unit
5 150	overall charge and discharge planning unit
160	individual charge and discharge planning unit
170	output unit
180	transmission unit

200 power storage device

210 storage battery

12077808_2 (GHMatters) P109904.AU

Claims

1. A charge and discharge planning system comprising:

a storage battery information obtaining unit configured to, for each consumer of a consumer group, obtain storage battery information that predicts a storage battery state indicating electric energy stored in a storage battery included in a power storage device installed at each consumer every lapse of a unit time in a future predetermined period!

an overall charge and discharge planning unit configured to determine a target value of an overall storage battery state to be changed by charging/discharging every lapse of the unit time in the predetermined period based on the storage battery information obtained by the storage battery information obtaining unit! and an output unit configured to output information to each consumer based on the target value, determined by the overall charge and discharge planning unit, of the overall storage battery state every lapse of the unit time in the predetermined period, to cause the power storage device installed at each consumer to charge and discharge the storage battery based on the information that has been output to the consumer.

2. The charge and discharge planning system according to claim 1, wherein the overall storage battery state shows a sum of the electric energy indicated by the storage battery state related to each consumer of the consumer group.

3. The charge and discharge planning system according to claim 1 or

2,

12077808_2 (GHMatters) P109904.AU wherein the overall charge and discharge planning unit calculates the overall storage battery state for the unit time every lapse of the unit time in the predetermined period, and determines the target value so that a cumulative evaluation value which is an accumulated sum of an evaluation value during the predetermined period according to the overall storage battery state when the overall storage battery state is changed by charging and discharging every lapse of the unit time meets a predetermined criterion.

4. The charge and discharge planning system according to claim 3, wherein the storage battery information obtaining unit obtains the storage battery information by receiving the storage battery information transmitted from each consumer of the consumer group.

5. The charge and discharge planning system according to claim 3 or 4, wherein the evaluation value shows an economic value, and the predetermined criterion is that the cumulative evaluation value is maximized.

6. The charge and discharge planning system according to any one of claims 3 to 5, further comprising:

a received electric power information obtaining unit that obtains received electric power information which indicates a result of measurement related to received electric power of the consumer group! and a prediction unit that predicts the received electric power of the consumer group every lapse of the unit time in the predetermined period based on the received electric power information, wherein the overall charge and discharge planning unit sets the

12077808_2 (GHMatters) P109904.AU evaluation value according to the overall storage battery state when the overall storage battery state is changed by charging and discharging every lapse of the unit time, based on whether or not received electric power of the consumer group for the unit time predicted by prediction unit meets a predetermined condition.

7. The charge and discharge planning system according to claim 6, wherein the received electric power information obtaining unit obtains the received electric power information by receiving the received electric power information indicating a result of measurement related to the received electric power of each consumer of the consumer group, from the consumer.

8. The charge and discharge planning system according to claim 6 or

7, wherein the predetermined condition includes a condition that the received electric power is greater than or equal to a predetermined lower limit, and when the received electric power predicted by the prediction unit meets the predetermined condition, the overall charge and discharge planning unit sets the evaluation value to be larger, as compared with when the received electric power does not meet the predetermined condition.

9. The charge and discharge planning system according to any one of claims 6 to 8, wherein the predetermined condition includes a condition that the received electric power is less than or equal to a predetermined upper limit, and the overall charge and discharge planning unit identifies the

12077808_2 (GHMatters) P109904.AU predetermined upper limit based on the received electric power information.

10. The charge and discharge planning system according to any one of claims 3 to 9, further comprising:

an electricity rate information obtaining unit that obtains electricity rate information indicating a rate related to electric power receiving of the consumer group, wherein the overall charge and discharge planning unit sets the evaluation value according to the overall storage battery state when the overall storage battery state is changed by charging and discharging every lapse of the unit time, based on the electricity rate information.

11. The charge and discharge planning system according to any one of claims 3 to 10, wherein the overall charge and discharge planning unit sets the evaluation value according to the overall storage battery state when the overall storage battery state is changed by charging and discharging every lapse of the unit time, based on the storage battery information.

12. The charge and discharge planning system according to any one of claims 1 to 11, further comprising an individual charge and discharge planning unit that determines a target value of the storage battery state related to each consumer of the consumer group every lapse of the unit time in the predetermined period, based on the target value, determined by the overall charge and discharge planning unit, of the overall storage battery state every lapse of the unit time in the predetermined period,

12077808_2 (GHMatters) P109904.AU wherein the output unit performs the output related to charge and discharge planning by transmitting charge and discharge planning information to each consumer of the consumer group, the charge and discharge planning information indicating the target value, determined by the individual charge and discharge planning unit, of the storage battery state of storage battery related to the consumer every lapse of the unit time in the predetermined period.

13. A charge and discharge planning system comprising a charge and discharge planning device that transmits charge and discharge planning information for causing a power storage device including a storage battery to charge and discharge the storage battery, the power storage device being provided to each consumer of a consumer group, wherein the charge and discharge planning device includes:

a storage battery information obtaining unit that, for each consumer of the consumer group, obtains storage battery information which predicts a storage battery state indicating an electric energy stored in the storage battery of the power storage device provided in the consumer every lapse of a unit time in a future predetermined period;

an overall charge and discharge planning unit that calculates an overall storage battery state showing a sum of electric energy indicated by a storage battery state related to each consumer of the consumer group for the unit time, every lapse of the unit time in the predetermined period based on the storage battery information obtained by storage battery information obtaining unit, and determine a target value of the overall storage battery state to be changed by charge and discharge every lapse of the unit time so that a cumulative evaluation value which is an accumulated sum of an evaluation value during

12077808_2 (GHMatters) P109904.AU the predetermined period according to the overall storage battery state when the overall storage battery state is changed by the charge and discharge every lapse of the unit time meets a predetermined criterion!

an individual charge and discharge planning unit that determines a target value of the storage battery state related to each consumer of the consumer group every lapse of the unit time in the predetermined period, based on the target value, determined by the overall charge and discharge planning unit, of the overall storage battery state every lapse of the unit time in the predetermined period! and a transmission unit that transmits individual charge and discharge planning to the power storage device of each consumer of the consumer group, the individual charge and discharge planning indicating a target value, determined by the individual charge and discharge planning unit, of the storage battery state related to the consumer every lapse of the unit time in the predetermined period, to cause the power storage device installed at each consumer to charge and discharge the storage battery based on the information that has been output to the consumer.

14. A planning method comprising:

for each consumer of a consumer group, obtaining storage battery information which predicts a storage battery state indicating an electric energy stored in a storage battery included in a power storage device installed at each consumer every lapse of a unit time in a future predetermined period!

determining a target value of an overall storage battery state to be changed by charging and discharging every lapse of the unit time in the predetermined period based on the storage battery information obtained in the obtaining! and

12077808_2 (GHMatters) P109904.AU outputting information to each consumer based on the target value of the overall storage battery state every lapse of the unit time in the predetermined period, to cause the power storage device installed at each consumer to charge and discharge the storage battery based on the information that has been output to the consumer.

15. A program for causing a computer to execute predetermined planning processing comprising:

for each consumer of a consumer group, obtaining storage battery information which predicts a storage battery state indicating an electric energy stored in a storage battery included in a power storage device installed at each consumer every lapse of a unit time in a future predetermined period;

determining a target value of an overall storage battery state to be changed by charging and discharging every lapse of the unit time in the predetermined period based on the storage battery information obtained in the obtaining! and outputting information to each consumer based on the target value of the overall storage battery state every lapse of the unit time in the predetermined period, to cause the power storage device installed at each consumer to charge and discharge the storage battery based on the information that has been output to the consumer.