Power sharing system, power sharing method, and power grid system

Abstract

To provide an electric power sharing system, an electric power sharing method, and an electric power system, capable of stably obtaining an electric power on a user side in the case where the electric power supplied from an electric power supply side is received by the user side.SOLUTION: An electric power sharing system 100 comprises a management part that performs a management of an electric power amount stored in a plurality of power storage batteries 12. The management part is assigned to each of a plurality of general users A-3, distributes a discharging amount against each of the plurality of power storage batteries 12 in accordance with the electric power amount that is used by each general user A-3 on the basis of a user authority that the user uses the electric power amount stored in each power storage battery 12, discharges the electric power stored in the plurality of power storage batteries 12 on the basis of the discharging amount distributed, performs a management that the electric power amount used by each general user A-3 is transmitted to each general user A-3 from each power storage battery 12 by consuming the electric power by an electric power load device 14 in a facility A-1 or selling an electric power by transmitting the electric power to an electric power network A-5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power sharing system, a power sharing method, and a power grid system. In particular, the present invention relates to a power sharing system, a power sharing method, and a power grid system that can be suitably used when transmitting power from a power storage means to a consumer. [Background technology]

[0002] With the liberalization of the electricity market, in order to expand business opportunities for companies and aim for a stable supply of electricity, a system is expanding in which electricity generated by multiple electricity suppliers is supplied via electricity retailers, and consumers can select an electricity retailer to purchase electricity energy. Conventionally, electricity suppliers and consumers who can exchange such electric energy have been limited to those who have physical facilities such as power generation facilities and storage facilities (hereinafter referred to as "electric power facilities"). Therefore, it is expected that by having companies and individuals who do not have such physical power facilities participate in energy sharing, the range of energy choices will be further expanded, and ultimately, the maximum utilization of renewable energy that can be supplied will be accelerated.

[0003] Patent Document 1 discloses a power control system. This power control system includes a storage battery capable of allocating a predetermined storage capacity to a consumer, and a power control device including a control unit that controls charging and discharging of the storage battery. When the control unit receives a charge / discharge instruction for the storage battery from a consumer, the control unit accepts the charge / discharge instruction if the charge / discharge amount based on the charge / discharge instruction is within the range of the storage capacity allocated to the consumer, and accepts the charge / discharge instruction if the charge / discharge amount based on the charge / discharge instruction is outside the range of the storage capacity allocated to the consumer, and reduces the storage capacity corresponding to the charge / discharge amount that exceeds the range of the storage capacity allocated to the consumer from the storage capacity that is not allocated to any consumer and allocates it to the consumer.

[0004] Patent Document 2 discloses a power supply system. This power supply system has a plurality of power storage devices installed for each unit of power demand connected to a power grid, a control device that controls charging of each power storage device for each unit of demand or discharging from the power storage device to a load for each unit of demand, information about the plurality of control devices is classified into predetermined groups according to their attributes and stored in a management database, a control instruction acquisition unit acquires control instructions that instruct adjustment of power supply, which are sent from a first power plant to a second power plant, and a group management unit refers to the management database according to the content of the control instructions, creates a schedule for charging or discharging of storage batteries for each predetermined group, and performs control according to the schedule. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-92386 [Patent Document 2] Japanese Patent Application Publication No. 2018-129911 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the demand side directly receives power supplied from the power supplier side, the demand side may not be able to obtain power stably due to restrictions imposed by the power facility. The present invention aims to provide a power sharing system, a power sharing method, and a power grid system that enable a demand side to obtain power more cheaply and stably when receiving power supplied from a power supplier. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention is an electricity sharing system that includes a management unit that manages the amount of electricity stored in multiple storage means, and the management unit is assigned to each of multiple consumers and allocates the amount of discharge to each of the multiple storage means in accordance with the amount of electricity that the consumer intends to use, based on the usage rights to use the amount of electricity stored in the storage means, and discharges the electricity stored in the multiple storage means based on the allocated amount of discharge, and consumes it in power load equipment within the facility or transmits it to the power grid and sells it, thereby treating the amount of electricity that the consumer intended to use as having been sent from the storage means to the consumer.

[0008] The management unit manages information on unallocated power usage rights, which is information on the amount of power for which usage rights have not been allocated to consumers, and can also manage the usage rights allocated to multiple consumers as information on power usage rights based on the unallocated power usage rights information. In this case, it becomes easy to manage the amount of power for which usage rights have not been allocated to consumers and the amount of power corresponding to the usage rights. The management unit can also manage the amount of power that the consumer has agreed to use based on the usage rights as power usage right execution information that manages the amount of power that the consumer has exercised the usage rights. In this case, it becomes easier to manage the amount of power that the consumer has agreed to use. Furthermore, the management unit can allocate the amount of power corresponding to the power use right execution information and determine the amount of discharge for each of the plurality of power storage means, which makes it easier to manage the amount of discharge. Furthermore, the management unit can predict the amount of power stored in the plurality of power storage means and allocate the amount of discharge based on the prediction. In this case, the allocation of the amount of discharge among the power storage means can be adjusted based on the prediction. The management unit can also predict the amount of stored electricity based on weather information for the area of ​​the facility that the electricity storage means is installed in. In this case, if the electricity storage means stores electricity generated by solar power, the distribution of the discharge amount of each electricity storage means can be adjusted based on the predicted amount of electricity generated. Furthermore, the management unit can make predictions based on the predicted amount of power consumption of the facilities in which the power storage means are installed. In this case, the distribution of the amount of discharge from each power storage means can be adjusted based on the amount of power predicted to be consumed in each facility. Furthermore, the management unit can allocate the amount of discharge based on at least one of the charge amount and the charge rate of the amount of electricity stored in the power storage means. In this case, priority is given to discharging from power storage means with a high charge rate or charge amount, making it possible to ensure the available storage capacity. After the management unit allocates the usage rights, one consumer can transfer the allocated usage rights to another consumer. In this case, the consumer can transfer the unused electricity usage rights to another consumer, allowing them to make effective use of the remaining electricity. Furthermore, the priority of allocation of usage rights can be adjusted depending on the past usage status of consumers, which can promote active use of the electricity sharing system. Furthermore, the charge for the amount of electricity used by the consumer can be calculated based on the amount of electricity supplied from the power grid and the amount of electricity used under the consumer's right of use. In this case, the charge is generally lower.

[0009] The present invention also provides an electricity sharing method in which a processor executes software recorded in memory to manage the amount of electricity stored in a plurality of electricity storage means, and the management involves allocating the amount of discharge to each of the plurality of electricity storage means in accordance with the amount of electricity that the consumers have agreed to use, based on the usage rights assigned to each of the plurality of consumers to use the amount of electricity stored in the electricity storage means, and discharging the electricity stored in the plurality of electricity storage means based on the allocated amount of discharge, and either consuming it in power load equipment within the facility or transmitting it to the power grid for sale, thereby treating the amount of electricity that the consumers have agreed to use as having been sent from the electricity storage means to the consumers.

[0010] Furthermore, the present invention provides a power sharing system comprising: a renewable energy power generation device which is installed in a predetermined facility and is a power generation facility that generates electricity using renewable energy; a plurality of storage means which store the electricity generated by the renewable energy power generation device; and a power sharing system which manages the allocation of the amount of electricity stored in the plurality of storage means to consumers, wherein the power sharing system comprises a management unit which manages the amount of electricity stored in the plurality of storage means, and the management unit allocates the amount of discharge to each of the plurality of storage means in accordance with the amount of electricity that the consumers have stated they will use, based on the usage rights assigned to each of the plurality of consumers to use the amount of electricity stored in the storage means, and discharges the electricity stored in the plurality of storage means based on the allocated amount of discharge, and consumes it in power load equipment within the facility or transmits it to the power grid and sells it, thereby managing the system so that the amount of electricity that the consumers have stated they will use is treated as having been sent from the storage means to the consumers.

[0011] The power storage means can store surplus power that occurs when the amount of power generated by the renewable energy power generation device is greater than the amount of power consumed by the power load devices that use renewable energy in the facility. In this case, the surplus power can be used effectively. The facility can also request the power sharing system to use the amount of power stored in the power storage means, in which case the amount of power stored in the power storage means can be adjusted. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a power sharing system, a power sharing method, and a power grid system that allow a demand side to obtain power more cheaply and stably when receiving power supplied from a power supplier. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram showing the overall configuration of a power system according to an embodiment of the present invention; [Figure 2] 10 is a flowchart illustrating the operation of the power sharing system. [Figure 3] 10 is a sequence diagram illustrating a process performed by the power sharing system to acquire SOC information. [Figure 4] 10(a) to 10(d) are conceptual diagrams illustrating the power retailer usage right allocation process. [Figure 5] FIG. 10 is a sequence diagram showing a process of allocating power usage rights to general consumers and a consumer right exercise process described later. [Figure 6] 10(a) to 10(d) are conceptual diagrams showing the process of allocating the right to use an amount of power to a general consumer. [Figure 7] 10(a) to 10(d) are conceptual diagrams showing the consumer right exercise process. [Figure 8] 10 is a sequence diagram illustrating the process of allocating discharge of actual storage batteries for exercise of rights and the process of instructing discharge of actual storage batteries performed by the power sharing system. FIG. [Figure 9] 10(a) to 10(d) are conceptual diagrams showing the actual storage battery discharge instruction process. [Figure 10] FIG. 10 is a sequence diagram illustrating the automatic allocation of usage rights process. [Figure 11] FIG. 10 is a conceptual diagram illustrating an automatic allocation process of usage rights. [Figure 12] FIG. 10 is a sequence diagram for processing a facility actual storage battery use request. [Figure 13] FIG. 1 is a conceptual diagram illustrating the transfer of a right of use. [Figure 14] 1A is a diagram showing the data structure of power usage right unallocated information, FIG. 1B is a diagram showing the data structure of power usage right information, and FIG. 1C is a diagram showing the data structure of power usage right enforcement information. [Figure 15] 3 and 4. (b) is a diagram showing the data structure of the right-of-use allocation information described in FIGS. 5 and 6. (c) is a diagram showing the data structure of the right-of-use exercise information described in FIG. 7. (d) is a diagram showing the data structure of the discharge instruction information described in FIGS. 8 and 9. [Figure 16](a) is a diagram showing the screen of a smart device that is displayed when a general consumer issues instructions for power usage. (b) is a diagram showing the screen of a smart device that is displayed when a general consumer checks their own operational performance. (c) is a diagram showing the screen of a smart device that is displayed when a general consumer issues instructions for transferring usage rights.

[0014] <Overall explanation of power grid system 1> FIG. 1 is a diagram showing the overall configuration of a power system 1 according to the present embodiment. The power grid system 1 shown in Figure 1 includes a facility A-1, an electricity retailer A-2, a general consumer A-3, a communication network A-4, a power grid A-5, other power plants A-6, a communication network A-7, a power transmission and distribution company A-8, a trading market A-9, and a power sharing system 100.

[0015] In FIG. 1, facility A-1 exemplifies facilities A to C. Facility A-1 indicates the relationship between the facility owners of facilities A to C and the PPA (Power Purchase Agreement) operators that provide power equipment for each of facilities A to C. Here, it is shown that renewable energy power generation equipment 11, storage batteries 12, and PCS 13 are installed in facilities A to C, respectively, and are owned by the PPA operators. It is also shown that power load equipment 14, EMS (Energy Management System) 15, smart meter 16, and PC (Personal Computer) 17 are installed in facilities A to C, respectively, and are owned by the facility owners.

[0016] Facilities A to C are public facilities, commercial facilities, etc., and provide the PPA operator with space such as their premises or rooftops. The PPA operator then installs renewable energy power generation equipment 11, which is power generation equipment that generates electricity using renewable energy, such as a solar power generation system or a wind power generation system, in the provided space. The PPA operator owns and manages the renewable energy power generation equipment 11. Furthermore, the PPA operator provides the electricity generated by the renewable energy power generation equipment 11 to the facility owners of Facilities A to C for a fee. The facility owners then use the provided electricity in power load equipment 14 within Facilities A to C. The power load equipment 14 is not particularly limited as long as it is equipment that operates using electricity, and may be, for example, lighting equipment, air conditioners, refrigeration and freezing equipment, etc.

[0017] In this case, the facility owner can, for example, install renewable energy power generation devices 11 in facilities A to C free of charge. Furthermore, the cost of the provided electricity is generally lower than that of electricity procured from the power grid A-5. Furthermore, since the electricity generated by the renewable energy power generation devices 11 is renewable energy, it can contribute to the realization of a carbon-neutral society. Note that the power grid A-5 here is a facility for generating, transforming, transmitting, and distributing electricity in order to supply electricity to the demand side. The demand side does not have to be the general consumer A-3 to which this embodiment applies, which will be described below. The power grid A-5 is managed and operated, for example, by a general electricity transmission and distribution company, and supplies electricity in a public capacity. On the other hand, the PPA operator can recover their investment by selling the electricity generated by the renewable energy power generation device 11, and also has the opportunity to earn stable profits over the long term.

[0018] As described above, the PPA operator owns the storage battery 12. The storage battery 12 is an example of a plurality of power storage means for storing the power generated by the renewable energy power generation device 11. The storage battery 12 is, for example, a chemical battery such as a lithium-ion battery or a nickel-metal hydride battery. The storage battery 12 stores surplus power that occurs when the amount of power generated by the renewable energy power generation device 11 is greater than the amount of power consumed by the power load devices 14 that use renewable energy. On the other hand, if the amount of power consumed by the power load devices 14 of facilities A to C is greater than the amount of power generated by the renewable energy power generation device 11, the shortage can be compensated for by being supplied from the power grid A-5. In this case, power is supplied from another power plant A-6 via the power grid A-5.

[0019] When the power stored in the storage battery 12 is discharged for use, a PCS (Power Conditioning Subsystem) 13 converts it into grid power. Then, the power generated by the renewable energy power generation device 11 can be used by power load devices 14. Furthermore, this power can also be transmitted to the power grid A-5 via a smart meter 16.

[0020] The EMS 15 monitors the power of each of the renewable energy power generation device 11, the storage battery 12, the PCS 13, the power load device 14, and the smart meter 16. The EMS 15 can grasp the amount of power generated and consumed within the facilities A to C. The EMS 15 can also control the charging and discharging of the storage battery 12.

[0021] The smart meter 16 is a watt-hour meter. When the power generated by the renewable energy power generation device 11 or the power discharged from the storage battery 12 is transmitted to the power grid A-5, the smart meter 16 measures the amount of this power as the amount of power sold. When the power is procured from the power grid A-5, the smart meter 16 measures the amount of this power as the amount of power purchased.

[0022] The PC 17 can access the application screen or browser screen of the power sharing system 100 and can check the SOC (State Of Charge) information of the storage battery 12. In other words, the storage rate of the storage battery 12 can be checked. In addition, the PC 17 can request the use of the power stored in the storage battery 12, as will be described in detail later.

[0023] In the above-described embodiment, the renewable energy power generation equipment 11 and other equipment installed in facility A-1 are separately owned by the facility owner and the PPA company, but it is also possible for the facility owner to own, manage, and operate everything without the PPA company's intervention. Also, in the above-described embodiment, a chemical battery is used as the storage battery 12, but this is not limited to this and a flywheel battery or the like may also be used.

[0024] Electricity retailer A-2 is a business that has a retail electricity supply contract with general consumer A-3, an example of a consumer. The electricity retailer sells electricity procured from facility A-1 or other power plant A-6, or electricity generated by its own facilities, to general consumer A-3. Electricity retailer A-2 owns a trading system 21, a supply and demand management system 22, a customer information system (CIS) 23, and a PC 24.

[0025] The trading system 21 trades electricity in the trading market A-9, enabling electricity procurement. The supply and demand management system 22 manages the supply of power to the general consumer A-3 in accordance with requests from the general consumer A-3. The customer management system 23 manages customer information of the general consumer A-3 as a customer, such as a customer number, customer name, address, and amount of power consumption. The PC 24 can allocate the right to use the amount of power stored in the storage battery 12 to the general consumer A-3, as will be described in detail later.

[0026] General consumer A-3 is an electricity consumer who does not have a power generation facility or a power storage facility, and corresponds to, for example, a general household. In Fig. 1, general consumers A to C are shown as examples of general consumer A-3. General consumers A to C each own an electric load device 31, a smart meter 32, and a smart device 33.

[0027] The power load device 31 is a device that operates using power, similar to the power load device 14, and corresponds to, for example, a home electric appliance found in an ordinary home. The smart meter 32 is a watt-hour meter, similar to the smart meter 16. The power used by the general consumer A-3 is supplied from the power grid A-5. The smart meter 32 measures the amount of power supplied from the power grid A-5 and used by the power load device 31. The smart device 33 is a computer terminal device owned by the general consumer A-3, such as a smartphone or tablet terminal. On the smart device 33, the general consumer A-3 can check the amount of electricity for which the general consumer A-3 has been assigned a right to use and exercise the right to use the amount of electricity by running software such as an app for the electricity sharing system 100. Note that the smart device 33 may be replaced with a PC or the like.

[0028] The power transmission and distribution company A-8 is a company that maintains and operates the facilities necessary for transmitting power and delivers power within its supply area. The power transmission and distribution company A-8 owns an HES (Head End System) 81, an HDMS (Meter Data Management System) 82, and a wheeling system 83. The HES 81 is a device that controls communication between the smart meters 16 and 32 and an aggregator that aggregates information from the smart meters. The HDMS 82 is a device that stores data from the smart meters 16 and 32, and issues instructions to the smart meters 16 and 32 to remotely open or close loads. The wheeling system 83 manages the transmission of power to the general consumer A-3 using facilities necessary for the transmission of power.

[0029] As shown in the figure, the facility A-1, the electricity retailer A-2, the general consumer A-3, and the electricity sharing system 100 are connected via a communication network A-4. The communication network A-4 is, for example, the Internet. As further shown in the figure, facility A-1, general consumer A-3, and electricity transmission and distribution company A-8 are connected via a communication network A-7. The communication network A-7 is, for example, a smart WAN (Wide Area Network), and is a communication network that transmits data on the amount of electricity used measured by smart meters 16 and 32.

[0030] General consumer A-3 has an electricity supply contract with electricity retailer A-2. Electricity retailer A-2 calculates electricity charges based on the amount of electricity consumed by general consumer A-3 and bills the consumer for that charge. The amount of electricity consumed by general consumer A-3 is collected by electricity transmission and distribution company A-8 from smart meters 32 installed in the residences of general consumer A-3 via a communication network (smart WAN) A-7. Electricity transmission and distribution company A-8 is linked to customer management system (CIS) 23 of electricity retailer A-2, with which general consumer A-3 has an electricity supply and demand contract. Customer management system (CIS) 23 calculates the electricity charge from the amount of electricity consumed and the electricity unit price for each time period.

[0031] Typically, the unit price of electricity is determined based on the price at which electricity is bought and sold in the trading market A-9. In this embodiment, it is assumed that the electricity retailer A-2 and the facility A-1 have concluded a bilateral contract for electricity supply and demand. In this case, the facility A-1, which has power equipment such as a renewable energy power generation device 11, is regarded as a power plant, and a different unit price of electricity is set for the electricity generated by this facility A-1 from the unit price of electricity bought and sold in the trading market A-9. In this case, the unit price of electricity supplied from the facility A-1, which has power equipment, under a bilateral contract is generally cheaper than the unit price of electricity bought and sold in the trading market A-9.

[0032] The power sharing system 100 manages the allocation of the amount of power stored in a plurality of storage batteries 12 to general consumers A-3. The power sharing system 100 includes a calculation / control unit 111, a storage unit 112, and a display unit 113. The arithmetic and control unit 111 is, for example, a processor such as a CPU (Central Processing Unit). The arithmetic and control unit 111 executes various software such as an OS (operating system) and applications (application software) to realize the processing performed by the power share system 100. The storage unit 112 is, for example, a main memory, and is a storage area that stores various software programs and data used for executing the software programs. Display unit 113 is a display device including a liquid crystal display, an organic EL (Electro Luminescent) display, or the like.

[0033] <Operational Description of the Power Sharing System 100> The power sharing system 100 operates as follows. FIG. 2 is a flowchart illustrating the operation of the power sharing system. The operation of the power sharing system 100 will be described below with reference to FIGS. First, the power sharing system 100 performs an actual storage battery SOC collection process (step S101). The actual storage battery SOC collection process is a process for collecting information such as the SOC (State Of Charge) of each storage battery 12 installed in facility A-1. In this case, the power sharing system 100 acquires SOC information of the storage battery 12 from the EMS 15 of facility A-1 via communication network A-4 (Internet network).

[0034] FIG. 3 is a sequence diagram when the power share system 100 performs processing to acquire SOC information. As shown in the figure, the power sharing system 100 acquires SOC information for each storage battery 12 installed in facilities A to C. Here, it is shown that the SOC information is acquired from EMSs 15A to 15C, which are EMSs 15 installed in facilities A to C, respectively. The collected SOC information includes key information that can uniquely identify the facility, and data such as the charge capacity, charge amount indicating the amount of stored electricity, and charge rate indicating the charge amount as a percentage of the storage battery 12 installed in the facility.

[0035] The power sharing system 100 stores the SOC information collected from the facilities A to C in the storage unit 112, and also stores the total value of the charge capacity and the total value of the charge amount as power usage right unallocated information in the storage unit 112. The power usage right unallocated information includes information indicating the charge amount of the storage batteries 12 that have not yet been allocated to the general consumers A to C. Here, the information indicating the charge amount of the storage batteries 12 that have not yet been allocated is the total value of the charge amount. The SOC collection process for the storage batteries 12 is performed periodically, and each time, the power sharing system 100 obtains the latest SOC information of the storage batteries.

[0036] Returning to Fig. 2, next, the power retailer A-2 performs a power retailer usage right allocation process (step S102). The power retailer usage right allocation process is a process in which the power share system 100 allocates a usage right to use the amount of power (charge amount) charged in the storage battery 12.

[0037] 4(a) to 4(d) are conceptual diagrams showing the electricity retailer usage right allocation process. FIG. 4(a) shows that facility A's charging capacity is 20 kWh and the charging amount is 10 kWh. In this case, the SOC is 50%. Similarly, FIG. 4(a) shows that facility B's charging capacity is 20 kWh and the charging amount is 7 kWh. In this case, the SOC is 35%. Furthermore, FIG. 4(a) shows that facility C's charging capacity is 10 kWh and the charging amount is 5 kWh. In this case, the SOC is 50%.

[0038] 4(b) shows the information on unallocated power usage rights, which indicates that the total charging capacity of facilities A to C is 20 kWh + 20 kWh + 10 kWh = 50 kWh, and the total charging amount is 10 kWh + 7 kWh + 5 kWh = 22 kWh.

[0039] When there is an amount of power available based on the information on unallocated power usage rights, the power retailer A-2 can allocate the usage rights for this amount of power to the general consumer A-3 with whom it has an electricity supply contract. Figure 4(c) shows a case where electricity retailer A-2 allocates electricity usage rights to general consumers A to C. In this case, the electricity sharing system 100 manages the electricity usage rights of general consumers A to C as electricity usage right information. Note that Figure 4(c) shows the state before the electricity usage rights of general consumers A to C are allocated. In other words, the electricity usage rights of general consumers A to C are all 0 kWh. FIG. 4(d) shows the power usage right execution information, which will be described later, and which is also 0 kWh at this stage.

[0040] FIG. 5 is a sequence diagram showing the process of allocating power usage rights to general consumers A to C and the consumer right exercise process, which will be described later. As shown in Figure 5, electricity retailer A-2 accesses the electricity sharing system 100 from his / her PC 24 and allocates usage rights to general consumers A to C by operating the screen, etc. At this time, usage right allocation information is sent from the PC 24 to the electricity sharing system 100. The usage right allocation information is information sent when allocating usage rights. The usage right allocation information includes key information that can uniquely identify the general consumer, the allocation amount of usage rights, etc. Then, the electricity sharing system 100 allocates usage rights to general consumers A to C based on the usage right allocation information sent.

[0041] 6(a) to 6(d) are conceptual diagrams showing the process of allocating the right to use the amount of power to the general consumers A to C. FIG. FIG. 6(a) shows right-of-use allocation information that allocates 7 kWh of power to each of general consumers A to C. Figures 6(b) and (c) show the results of allocating 7 kWh of electricity (21 kWh in total) to each of general consumers A to C. The illustrated power usage right information indicates that the capacity of the usage right area for each of general consumers A to C is 10 kWh. The capacity of the usage right area represents the upper limit of the amount of electricity that can be allocated to general consumers A to C. The power usage right information is then updated to indicate that a charging amount of 7 kWh has been allocated to each of general consumers A to C as the usage right area. In this case, the information on unallocated power usage rights is updated by subtracting the allocated amount of power. In this case, the information on unallocated power usage rights indicates that 21 kWh of power has been subtracted from 22 kWh, leaving 1 kWh remaining.

[0042] The power sharing system 100 stores the power usage right information in the memory unit 112. Note that in Fig. 6, the capacities of the usage right areas of the general consumers A to C are all the same, but the usage right areas can be specified at the time of the power supply and demand contract concluded between the power retailer A-2 and the general consumers A to C.

[0043] Returning to Fig. 2, next, the power sharing system 100 performs a consumer right exercise process (step S103). The consumer right exercise process is a process that the power sharing system 100 performs when a general consumer A to C actually issues an instruction to use power based on the usage right of the amount of power allocated to that consumer.

[0044] As shown in FIG. 6(b), when general consumers A to C have usage rights assigned to them based on the power usage right information, as shown in FIG. 5, the general consumers A to C access the power sharing system 100 from their smart devices 33. Here, the case where the general consumers A to C access the power sharing system 100 from their smart devices 33A to 33C, which are the smart devices 33 respectively owned by the general consumers A to C, is illustrated. The general consumers A to C can then check the amount of power for which they have been assigned usage rights using an application screen, a browser screen, or the like. The general consumers A to C can also check their own operational performance on the same screen. Furthermore, the general consumers A to C can issue instructions for power usage by operating the same screen. The power sharing system 100 manages this as usage right exercise information. The usage right exercise information includes information on the amount of power that the general consumers A to C intend to use. The usage right exercise information includes key information that can uniquely identify the general consumers A to C, the date and time when the usage right is exercised, the amount of charge to be used, etc. The electricity sharing system 100 stores the use right exercise information in the storage unit 112.

[0045] 7(a) to 7(d) are conceptual diagrams showing the consumer right exercise process. Figure 7(a) shows right-of-use exercise information. Figure 7(a) shows that general consumer A has instructed (exercised right) to use 4 kWh of electricity from 18:00 to 19:00 on September 2nd. It also shows that general consumer B has instructed (exercised right) to use 2 kWh of electricity from 19:00 to 20:00 on September 2nd. It also shows that general consumer C has instructed (exercised right) to use 1 kWh of electricity from 21:00 to 22:00 on September 2nd.

[0046] Based on the acquired usage right exercise information, the electricity sharing system 100 subtracts the amount of charging used from the electricity usage right information and updates it, and stores the total value of the charging amount for which the usage right has been exercised as the electricity usage right execution information in the memory unit 112. 7(c) shows the power usage right information, which has been updated by subtracting 4 kWh, 2 kWh, and 1 kWh, respectively, from the amounts of power that general consumers A to C have agreed to use as a result of exercising the rights. 7(d) shows power usage right execution information indicating the amount of power that general consumers A to C are to use. Here, the power usage right execution information is managed as a total value of the amount of power, which is 4 kWh + 2 kWh + 1 kWh = 7 kWh.

[0047] At this time, general consumer A-3 specifies the date, time, and amount of power to be used, but the amount of power to be supplied on that date and time is supplied not from the storage battery 12 of facility A-1 but from the power grid A-5. The amount of power supplied from the power grid A-5 on the relevant date and time is measured by a smart meter 32 installed at the residence of general consumer A-3, etc., and the amount of power is exchanged with power retailer A-2 via power transmission and distribution company A-8 as the amount of power consumed. Meanwhile, the amount of power that general consumer A-3, who has an electricity supply and demand contract, exercised using the power sharing system 100 is exchanged with power retailer A-2's customer information system (CIS) 23 from the power sharing system 100. The power retailer A-2 calculates the electricity bill for general consumer A-3 based on the amount of power consumed on that date and time by general consumer A-3 and the amount of power exercised on the date and time by the power sharing system 100.

[0048] The electricity charge in this case is calculated by adding the amount of electricity consumed minus the amount of electricity for which usage rights have been exercised in the electricity sharing system 100 for each date and time, multiplied by the electricity unit price based on the trading market A-9, and the amount multiplied by the electricity unit price agreed upon in the bilateral contract with facility A-1, which has exercised usage rights in the electricity sharing system 100. This also means that the charge for the amount of electricity used by general consumer A-3 is calculated based on the amount of electricity supplied from power grid A-5 and the amount of electricity for which the right of use has been exercised.

[0049] Returning to FIG. 2, the power share system 100 performs an exercised right actual storage battery discharge allocation process (step S104) and also performs an actual storage battery discharge instruction process (step S105). The actual battery discharge allocation process for the exercised right is a process of allocating the discharge amount corresponding to the amount of power for which the general consumer A-3 exercised the right to each of the multiple storage batteries 12. The actual battery discharge instruction process is a process of issuing an instruction to the storage batteries 12 to actually discharge. 7, when there is an amount of power according to the power usage right execution information, the power sharing system 100 allocates the amount of power to be discharged from each storage battery 12 installed in each of the facilities A to C as an exercised right actual storage battery discharge allocation process. Then, the power sharing system 100 issues a discharge instruction to the EMS 15 of each storage battery 12 as an actual storage battery discharge instruction process. Based on this discharge instruction, the EMS 15 controls the discharge of the storage batteries 12 in the facilities A to C.

[0050] FIG. 8 is a sequence diagram when the power share system 100 performs the exercised right actual storage battery discharge allocation process and the actual storage battery discharge instruction process. Here, the case is shown in which the power share system 100 performs a storage battery discharge instruction process for the EMSs 15A to 15C of the facilities A to C, respectively, after performing a storage battery discharge allocation process for the exercised right amount.

[0051] Discharge instruction information, which is information instructing discharge, is sent to the EMS 15. The discharge instruction information includes key information that can uniquely identify the facilities A to C, a discharge instruction amount, and the like.

[0052] 9(a) to 9(d) are conceptual diagrams showing the actual storage battery discharge instruction process. Fig. 9(a) shows a case where the power sharing system 100 has issued a command to discharge 3 kWh to the storage battery 12 in facility A. Fig. 9(a) also shows a case where the power sharing system 100 has issued a command to discharge 3 kWh to the storage battery 12 in facility B. Fig. 9(a) also shows a case where the power sharing system 100 has issued a command to discharge 1 kWh to the storage battery 12 in facility C.

[0053] The power sharing system 100, at the same time as transmitting the discharge instruction information, subtracts the discharge instruction amount from the power usage right execution information and updates it. In this case, as shown in Figure 9(d), the discharge instruction amount of 3kWh + 3kWh + 1kWh = 7kWh is subtracted from the power usage right execution information, indicating that it is now 0kWh.

[0054] The actual storage battery discharge allocation process for the exercised right and the actual storage battery discharge instruction process do not need to be executed immediately when the general consumers A to C exercise their right. In other words, there can be a time lag before they are executed.

[0055] 2, after step S101, an automatic allocation process for usage rights can also be performed (step S106). The automatic allocation process for usage rights is a process in which the electricity retailer A-2 automatically allocates usage rights to the general consumers A-3. In other words, as described above, the electricity retailer A-2 can not only allocate usage rights for the amount of electricity individually to the general consumers A-3 with whom it has an electricity supply and demand contract, but can also instruct the automatic allocation.

[0056] FIG. 10 is a sequence diagram showing the process of automatically allocating usage rights. Here, the automatic allocation of usage rights is performed after the process of acquiring SOC information of the storage battery 12 shown in Fig. 3. In this case, the PC 24 of the electricity retailer A-2 issues an instruction to automatically allocate usage rights, and the electricity sharing system 100 performs the automatic allocation of usage rights.

[0057] FIG. 11 is a conceptual diagram showing the automatic allocation of usage rights process. 11(a) shows that the power sharing system 100 calculates the allocation amount using the allocation logic. For example, if 8 kWh of power has not yet been allocated in the power usage right unallocated information, 3 kWh of power is allocated to general consumer A. 3 kWh of power is also allocated to general consumer B. 2 kWh of power is also allocated to general consumer C. As a result, as shown in FIG. 11(c), the power usage right information is updated so that the amount of power is automatically allocated to each of the general consumers A to C and assigned as a usage right area.

[0058] 2, after step S103, a facility actual storage battery use request process can be performed (step S107). The facility actual storage battery use request process is a process performed by the power share system 100 when facility A-1 requests the power share system 100 to use the amount of power stored in the storage battery 12.

[0059] FIG. 12 is a sequence diagram for performing the facility actual storage battery use request process. FIG. 12 shows a case where a request is made to the power sharing system 100 to use the amount of power stored in the storage battery 12 of facility A. As shown in the figure, PC 17A, which is the PC 17 of facility A, acquires stored power use request information from an administrator of facility A or the like. Then, PC 17A sends stored power use request information requesting the use of the storage battery 12 to the power sharing system 100, requesting the use of the amount of charge in the storage battery 12. The stored power use request information is information sent when requesting the use of the amount of charge in the storage battery 12. The stored power use request information includes key information that can uniquely identify the facility, the requested amount of use, etc.

[0060] At this time, the power share system 100 performs a facility actual storage battery use request process. This facility actual storage battery use request process is performed as follows. Normally, the requested usage amount is subtracted from the charge amount in the power usage right execution information to update the information, and discharge instruction information is sent to the EMS 15 of facility A. On the other hand, if the requested usage amount is greater than the charge amount in the power usage right execution information, the shortfall is subtracted from the charge amount in the power usage right unallocated information to update the information, and discharge instruction information is sent to the EMS 15. In these cases, the power sharing system 100 performs the above-mentioned actual storage battery discharge instruction process.

[0061] In addition, if the requested usage amount cannot be met even with the charge amount in the power usage right execution information and the charge amount in the power usage right unallocated information, the operator is notified on the application screen or browser screen of the power sharing system 100 displayed on PC 17 that the usage request cannot be executed.

[0062] In this way, in response to a usage request from facility A, the power sharing system 100 can use the amount of charge within the range of the power usage right execution information for which general consumer A-3 has exercised the usage right and the power usage right unallocated information for which no usage right has been allocated to general consumer A-3. As a result, the system is set up to ensure that the amount of charge is secured for the power usage right information for which a usage right has been allocated to general consumer A-3. The discharged power may not only be consumed by the general consumer A-3, but may also be transmitted to the power grid A-5 and sold.

[0063] This allows for the adjustment of the amount of electricity stored in the storage battery 12. In addition, it is possible to select between discharging and storing electricity depending on the electricity price in the trading market A-9. That is, when the electricity price in the trading market A-9 is high and there is a surplus in the amount of electricity stored in the storage battery 12, electricity is sold by discharging, and when the electricity price in the trading market A-9 is low or there is no surplus in the amount of electricity stored in the storage battery 12, electricity is stored.

[0064] <Explanation of effect> Conventionally, electricity suppliers and consumers have directly exchanged electricity via the power grid A-5. In this case, considerations such as the wheeling of electricity must be considered, resulting in wheeling charges, making it difficult to enjoy cost benefits. Furthermore, unless the consumer has power facilities such as storage batteries, it is difficult to implement energy management such as charging and discharging. Therefore, it is difficult for general consumers A-3, who do not have such power facilities, to directly exchange electricity with the power supplier. On the other hand, in the above-described embodiment, the general consumer A-3 on the demand side does not exchange power directly with the facility A-1 on the power supply side via the power grid, but exchanges power virtually without going through the power grid A-5. This allows the general consumer A-3, who does not have power equipment such as a storage battery, to perform energy management. This management is performed by the power sharing system 100.

[0065] To achieve this, the power sharing system 100 has a function as a collection unit that collects the amount of power stored in the multiple storage batteries 12. The power sharing system 100 also has a function as a management unit that manages the amount of power stored in the multiple storage batteries 12. As a function of the management unit, the power sharing system 100 allocates the amount of power discharged from each of the multiple storage batteries 12 in accordance with the amount of power that the general consumers A-3 intend to use, based on the usage rights assigned to each of the multiple general consumers A-3 to use the amount of power stored in the storage batteries 12. Then, based on the allocated amount of power discharged, the amount of power stored in the multiple storage batteries 12 is consumed by the power load devices 14 of the facility A-1 or transmitted to the power grid A-5. The amount of electricity that general consumer A-3 has stated that it will use is supplied from power grid A-5, but in cooperation with electricity retailer A-2, the amount of electricity that general consumer A-3 has stated that it will use is calculated as the unit price of electricity in the bilateral contract between electricity retailer A-2 and the facility owner, and management is carried out in such a way that the amount of electricity that general consumer A-3 has stated that it will use is sent from storage battery 12 to general consumer A-3.

[0066] In this case, the power sharing system 100, as a function of the management section, manages information on unallocated power usage rights, which is information on the amount of power for which usage rights have not been allocated to general consumer A-3. Furthermore, as a function of the management section, the power sharing system 100 manages, based on the unallocated power usage rights information, the usage rights allocated to multiple general consumers A-3 as power usage right information. As a function of the management section, the power sharing system 100 manages the amount of electricity that general consumer A-3 is to use based on the usage rights as power usage rights execution information that manages the amount of electricity for which the usage rights have been exercised. Furthermore, the power share system 100, as a function of the management unit, allocates the amount of power corresponding to the power usage right execution information and determines the amount of discharge for each of the multiple storage batteries 12.

[0067] In the above-described embodiment, the power supplier and the demand side virtually exchange power without going through the power grid A-5. That is, power is treated as being virtually sent from the power supplier to the demand side based on information such as usage rights. In this case, even if the demand side is a general consumer A-3 that does not have power equipment such as a storage battery, it can receive and send power from the power supplier. Furthermore, the power supply facility A-1 can effectively utilize surplus power and provide a new service of virtual power supply to the general consumer A-3. Furthermore, it can increase the amount of renewable energy used. Furthermore, the power supply facility A-1 is free to use power in its own power load devices 14 as long as it secures the usage rights of the general consumer A-3.

[0068] Furthermore, since the usage rights of general consumer A-3, who is on the demand side, are secured, when general consumer A-3, who is on the demand side, receives power supplied from facility A-1, which is on the power supply side, general consumer A-3 can obtain power stably. By using such a power sharing system 100, energy sharing can be carried out more efficiently. Furthermore, if more power suppliers and demanders participate in energy sharing, the range of energy choices can be further expanded, and it becomes possible to greatly expand the utilization of renewable energy that can be supplied.

[0069] <Explanation of how to allocate discharged amounts> The amount of power generated by the renewable energy power generation device 11 may be affected by weather and other factors. For example, in the case of solar power generation, if there is little sunlight due to bad weather, the amount of power generated will be small. In this case, if the area of ​​a certain facility A-1 experiences bad weather, the amount of power generated by the renewable energy power generation device 11 in that facility may be small, and the amount of power consumed by the power load equipment 14 may be greater. In this case, the shortfall in power will be compensated for by supplying it from the power grid A-5, but the power supplied from this power grid A-5 will be more expensive than the power generated by the renewable energy power generation device 11. Therefore, if there is power stored in the storage battery 12 in the facility A-1, priority can be given to using that power to achieve cost benefits.

[0070] Under this premise, the above-mentioned process for allocating the actual battery discharge for the exercise of the right has logic for allocating the discharge amount based on the weather information for the next day for each area of ​​each facility A-1. Specifically, weather information for the next day in the area of ​​each facility A-1 is obtained from a publicly available weather information site via communication network A-4 (Internet network), and the amount of discharge is allocated so that the facility A-1 that is predicted to have more sunlight the next day has a higher amount of discharge than the facility A-1 that is predicted to have less sunlight the next day. This suppresses discharge from the facility A-1 that is predicted to have less sunlight the next day, ensuring the remaining storage capacity, and if there is actually no sunlight the next day and the amount of power consumed is greater than the amount of power generated, it becomes possible to use the power stored in storage battery 12.

[0071] In other words, the power sharing system 100 predicts the amount of power stored in the multiple storage batteries 12 and allocates the amount of discharge based on the prediction. In this case, the power sharing system 100, as a function of the management unit, makes this prediction based on weather information for the area of ​​facility A-1 where the storage batteries 12 are installed.

[0072] Furthermore, without being limited to this, the power sharing system 100 can also allocate based on the predicted amount of power consumption of the facility A-1 in which the storage battery 12 is installed. For example, the power sharing system 100 has allocation logic that allocates the amount of discharge based on the predicted amount of power consumption of each facility A-1 for the next day. Depending on the purpose of each facility A-1, the amount of power consumed varies depending on the date, day of the week, whether it is open or closed (holidays, national holidays, etc.), or specific events. The power consumption of each facility A-1 is stored as data and statistically analyzed to make it possible to predict the power consumption for the next day. This power consumption prediction is used to allocate the amount of discharge.

[0073] In this case, based on the predicted power consumption of each facility for the next day, the system allocates more power to facilities that are predicted to consume less power than facilities that are predicted to consume more power the next day. This reduces the discharge of power to facilities that are predicted to consume more power the next day, ensuring the remaining power storage capacity, and making it possible to use the power stored in the storage battery if the actual power consumption is high the next day.

[0074] In the above description, allocation was based on the weather information for the next day and the predicted amount of electricity consumption for the next day, but this is not limited to the next day, and the time point for making the prediction can be set as desired, such as 24 hours later, the day after, or one week later.

[0075] The allocation described above requires external information and accumulated data for statistical analysis. If this data is not available or until the necessary amount of data can be accumulated, a simple allocation logic is required.

[0076] In this case, the power sharing system 100 can allocate the amount of discharge based on at least one of the charge amount and the charge rate of the amount of power stored in the storage battery 12. In other words, based on the data on the power storage rate included in the SOC information collected in the actual battery SOC collection process, the system allocates a larger amount of discharge to facilities with a higher power storage rate than to facilities with a lower power storage rate. This gives priority to discharge from facilities with a higher power storage rate, making it possible to ensure sufficient storage capacity. Alternatively, the charge amount may be used instead of the charge rate. That is, based on the charge amount data included in the SOC information collected in the actual battery SOC collection process, the amount of discharge is allocated so that a facility with a large charge amount has a larger amount of discharge than a facility with a small charge amount. This gives priority to discharge at a facility with a large charge amount, making it possible to ensure sufficient storage capacity.

[0077] <Explanation of transfer of rights> As mentioned above, in the electricity retailer usage right allocation process or automatic allocation process, usage rights are allocated to each general consumer A-3. One general consumer A-3 can instruct another general consumer A-3 to transfer the usage rights allocated to him / her. This allows him / her to transfer the electricity usage rights he / she is not using and make effective use of them. In this case, the general consumer A-3 can access the power sharing system 100 from his / her smart device 33, check the amount of charge for which he / she has been allocated usage rights on an application screen, browser screen, or the like, and issue an instruction to transfer the usage rights by operating the same screen. At this time, right transfer instruction information is sent from the smart device 33 to the power sharing system 100. The right transfer instruction information is information sent when one general consumer A-3 instructs another general consumer A-3 to transfer the usage rights allocated to him / her. The right transfer instruction information includes key information that can uniquely identify the general consumer A-3 from which the usage rights are being transferred, key information that can uniquely identify the general consumer A-3 to whom the usage rights are being transferred, the usage rights allocation amount to be transferred, etc.

[0078] FIG. 13 is a conceptual diagram showing the transfer of usage rights. In Fig. 13(a), the source of the right of use is general consumer A, and the destination of the right of use is general consumer B. The right of use quota, which is the right of use to be transferred, is 3 kWh. In this case, as shown in Figure 13(c), the electricity sharing system 100 subtracts the usage right allocation amount to be transferred from the usage right area of ​​general consumer A, the source of the usage right transfer, based on the acquired rights transfer instruction information. Also, it adds the usage right allocation amount to be transferred to the usage right area of ​​general consumer B, the destination of the usage right transfer, and stores the result in the memory unit 112.

[0079] <Explanation of priority allocation of usage rights> As described above, in the automatic allocation of usage rights process, the power sharing system 100 calculates the allocation amount using allocation logic from the charging amount in the power usage rights unallocated information, and stores the allocation amount for each general consumer A-3 in the memory unit 112. The simplest allocation logic in this case is equal distribution, which divides the charge amount in the information on unallocated power usage rights by the number of general consumers A-3 and distributes it equally.

[0080] Furthermore, the electricity sharing system 100 may use an allocation logic that provides incentives to active users among the general consumers A-3. Specifically, the electricity sharing system 100 weights the allocation ratio and allocates electricity preferentially to general consumers A-3 who exercise their usage rights many times or in large quantities. This means that the priority of the allocation of usage rights is adjusted depending on the past usage status of the general consumers A-3. This leads to the promotion of active use of the electricity sharing system 100.

[0081] <Explanation of Information Stored in Storage Unit 112> FIG. 14(a) is a diagram showing the data structure of the power use right unallocated information. The illustrated information on unallocated power usage rights consists of capacity, charge amount, charge rate, validity flag, and data aggregation date and time. In this case, the time when the unallocated power usage rights information is aggregated is taken as the data aggregation date and time, and the corresponding capacity, charge amount, charge rate, and validity flag are saved in the memory unit 112. The validity flag indicates whether the data is valid or not. If the validity flag is "1", the data is treated as valid. If the validity flag is "0", the data is treated as invalid. When data is updated, the new data is made valid and the data that was previously used is invalid. Data that is invalidated remains as history.

[0082] FIG. 14(b) is a diagram showing the data structure of the power use right information. The illustrated power usage right information consists of a consumer general key, capacity, charge amount, charge rate, validity flag, and data update date and time. In this case, the time when the power usage right information is updated is taken as the data update date and time, and the corresponding capacity, charge amount, charge rate (storage rate), and validity flag are stored in memory unit 112. The consumer general key corresponds to key information that can uniquely identify general consumers A to C.

[0083] FIG. 14(c) is a diagram showing the data structure of the power use right execution information. The illustrated power usage right execution information includes capacity, charge amount, charge rate, validity flag, and data aggregation date and time. In this case, the time when the power usage right execution information is aggregated is set as the data aggregation date and time, and the corresponding capacity, charge amount, charge rate (electricity storage rate), and validity flag are stored in the storage unit 112.

[0084] FIG. 15(a) is a diagram showing the data structure of the SOC information described with reference to FIGS. The SOC information shown in the figure consists of a facility unique key, charging capacity, charging amount, SOC, and data acquisition date and time. In this case, the time when the SOC information was acquired is taken as the data acquisition date and time, and the corresponding facility unique key, charging capacity, charging amount, and SOC are stored in the storage unit 112. The facility unique key corresponds to key information that can uniquely identify facilities A to C.

[0085] FIG. 15(b) is a diagram showing the data structure of the license allocation information described with reference to FIGS. The illustrated right-of-use allocation information includes a customer unique key, a right-of-use allocation amount, and a data acquisition date and time. In this case, the time when the right-of-use allocation information is acquired is set as the data acquisition date and time, and the corresponding customer unique key and right-of-use allocation amount are stored in the storage unit 112.

[0086] FIG. 15(c) is a diagram showing the data structure of the usage right exercise information explained in FIG. The illustrated right-of-use exercise information consists of a consumer unique key, exercise start date and time, exercise end date and time, exercise amount, and data acquisition date and time. In this case, the time when the right-of-use exercise information is acquired is taken as the data acquisition date and time, and the corresponding consumer unique key, exercise start date and time, exercise end date and time, and exercise amount are stored in memory unit 112. The exercise start date and time and exercise end date and time can be used to identify the date and time when the right of use is exercised. The exercise amount is the amount of charging used.

[0087] FIG. 15(d) is a diagram showing the data structure of the discharge instruction information described with reference to FIGS. The discharge instruction information shown in the figure consists of a facility unique key, a discharge amount, and a data acquisition date and time. In this case, the time when the discharge instruction information is acquired is taken as the data acquisition date and time, and the corresponding facility unique key and discharge amount are stored in the memory unit 112.

[0088] <Explanation of the operation screen for general consumers> FIG. 16(a) is a diagram showing a screen G of the smart device 33 that is displayed when the general consumers A to C give instructions on power usage. Here, as explained in FIGS. 6 and 7, general consumers A to C access their own smart devices 33 and give instructions on power usage. In this case, a scheduling field is displayed along with information created by the power sharing system 100. General consumers A to C can give instructions on power usage by entering information in the scheduling field.

[0089] FIG. 16(b) is a diagram showing a screen G of the smart device 33 that is displayed when the general consumers A to C check their own operational performance. On this screen G, general consumers A to C can check the electricity charges and CO2 emissions as the operation results for this month. In addition, general consumers A to C can check the operation status by month.

[0090] FIG. 16(c) is a diagram showing a screen G of the smart device 33 that is displayed when the general consumers A to C issue an instruction to transfer the right of use. Here, as explained in FIG. 13, general consumers A to C access their respective smart devices 33 and issue instructions to transfer usage rights. FIG. 16(c) shows a case in which general consumer A transfers rights to general consumer B using smart device 33A. General consumer B can then confirm this using smart device 33B. FIG. 16(c) also shows that general consumer A then sends 5 kWh of electricity to general consumer B as a gift and posts this on a social networking service (SNS). By posting on SNS, it is expected that more electricity suppliers and consumers will participate in energy sharing.

[0091] <Explanation of power sharing method> The above-described processing performed by the power sharing system 100 is realized by the cooperation of software and hardware resources. That is, the processor inside the computer provided in the power sharing system 100 loads the software that realizes each of the above-described functions into memory and executes it to realize each of these functions.

[0092] Therefore, the processing performed by the power sharing system 100 can be seen as a power sharing method in which a processor executes software recorded in memory to manage the amount of electricity stored in multiple storage batteries 12, and the management involves allocating the amount of discharge to each of the multiple storage batteries 12 in accordance with the amount of electricity that the general consumer A-3 intends to use based on the usage rights assigned to each of the multiple general consumers A-3 to use the amount of electricity stored in the storage batteries 12, and discharging the electricity stored in the multiple storage batteries 12 based on the allocated amount of discharge, and either consuming it at the power load equipment 14 within the facility A-1 or transmitting it to the power grid A-5 for sale, thereby treating the amount of electricity that the general consumer A-3 intended to use as having been sent from the storage batteries 12 to the general consumer A-3.

[0093] Although the present embodiment has been described above, the technical scope of the present invention is not limited to the scope described in the above embodiment. It is clear from the claims that various modifications and improvements to the above embodiment are also included in the technical scope of the present invention. [Explanation of symbols]

[0094] 1...power grid system, 11...renewable energy power generation device, 12...storage battery, 14...power load equipment, 100...power sharing system, 111...arithmetic and control unit, 112...memory unit, A-1...facility, A-2...electricity retailer, A-3...general consumer, A-4...communication network, A-5...power grid, A-6...other power plants, A-7...communication network, A-8...power transmission and distribution company, A-9...trading market

Claims

1. a management unit that manages the amount of electric power stored in the plurality of electric storage means; The management unit allocating a discharge amount to each of the plurality of power storage means in accordance with the amount of power that the consumer intends to use based on a right of use allocated to each of the plurality of consumers and stored in the power storage means; Based on the allocated discharge amount, the power stored in the plurality of power storage means is discharged, and the power is consumed by power load devices within the facility or transmitted to a power grid for sale, thereby treating the amount of power that the power storage means has sent to the consumer that the consumer intended to use. Management power sharing system.

2. The power sharing system of claim 1, wherein the management unit manages unallocated power usage rights information, which is information on the amount of power for which the usage rights have not been allocated to a consumer, and manages the usage rights allocated to multiple consumers based on the unallocated power usage rights information as power usage right information.

3. The power sharing system of claim 1 or 2, wherein the management unit manages the amount of electricity that the consumer intends to use based on the usage right as power usage right execution information that manages the amount of electricity that the consumer has exercised the usage right.

4. The power sharing system according to claim 3 , wherein the management unit allocates the amount of power corresponding to the power usage right execution information and determines the amount of discharge of each of the plurality of power storage means.

5. The power sharing system according to claim 1 , wherein the management unit predicts the amount of power stored in the plurality of power storage means, and allocates the amount of discharged power based on the prediction.

6. The power sharing system according to claim 5 , wherein the management unit predicts the amount of stored power based on weather information for a region in which the power storage means is installed.

7. The power sharing system according to claim 5 , wherein the management unit makes the prediction based on a predicted amount of power consumption of a facility in which the power storage means is installed.

8. The power sharing system according to claim 1 , wherein the management unit allocates the amount of discharge based on at least one of a charge rate and a charge amount of the amount of power stored in the power storage means.

9. The power sharing system according to claim 1 , wherein after the management unit allocates the usage rights, one consumer transfers the usage rights allocated to that consumer to another consumer.

10. The power sharing system according to claim 1 , wherein the priority of the right of use when allocating the right of use is adjusted depending on the past usage status of the consumer.

11. The power sharing system according to claim 1, wherein the charge for the amount of electricity used by the consumer is calculated based on the amount of electricity supplied from the power grid and the amount of electricity for which the right of use has been exercised.

12. The processor executes the software stored in the memory. Manage the amount of electricity stored in the multiple electricity storage means; As the management, allocating a discharge amount to each of the plurality of power storage means in accordance with the amount of power that the consumer intends to use based on a right of use allocated to each of the plurality of consumers and stored in the power storage means; Based on the allocated discharge amount, the power stored in the plurality of power storage means is discharged, and the power is consumed by power load devices within the facility or transmitted to a power grid for sale, thereby treating the amount of power that the power storage means has sent to the consumer that the consumer intended to use. Manage Power sharing methods.

13. A renewable energy power generation device that is installed in a predetermined facility and is a power generation facility that generates power using renewable energy, and a plurality of power storage means that store the power generated by the renewable energy power generation device; a power sharing system that manages the allocation of the amount of power stored in the plurality of power storage means to consumers; Equipped with The power sharing system includes: a management unit that manages the amount of electric power stored in the plurality of electric storage means, The management unit allocating a discharge amount to each of the plurality of power storage means in accordance with the amount of power that the consumer intends to use based on a right of use allocated to each of the plurality of consumers and stored in the power storage means; Based on the allocated discharge amount, the power stored in the plurality of power storage means is discharged, and the power is consumed by power load devices within the facility or transmitted to a power grid for sale, thereby treating the amount of power that the power storage means has sent to the consumer that the consumer intended to use. The power grid system that manages it.

14. 14. The power grid system according to claim 13, wherein the storage means stores surplus power that is generated when the amount of power generated by the renewable energy power generation device is greater than the amount of power consumed by power load devices that use the renewable energy in the facility.

15. The power system according to claim 13, wherein the facility can request the power sharing system to use the amount of power stored in the power storage means.

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