JP2021015467A - Power consignment system and method - Google Patents

Abstract

To appropriately evaluate the value of each electric power at the time of electric power generation and at the time of electric power consumption when the electric power generated by one customer is consigned to another customer, i.e., the electric power is remitted.SOLUTION: A power consignment system is provided with a PV 42a that generates electric power in a user system, a power storage device 51 that stores electric power on an electric power grid, an electric power storage time information recording unit that records a market price or the like at the time of storage as information at the time of electric power storage, a token issuing unit that issues an electric power transaction token including an electric power amount and a consideration amount according to the evaluation of the electric power stored based on the information at the time of electric power storage, a consignment requesting unit that transmits consignment request information for requesting transfer to a power supplier of the token, a token transfer unit that transfers the ownership of the electric power transaction token related to the request to the power supplier together with the consignment request information, and a PPS 5b, on the power supplier side, that supplies a supply destination designated based on the consignment request information with the electric power of the electric power amount or the consideration amount equivalent to that of the transferred electric power transaction token.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electric power consignment system and method capable of so-called remittance of electric power, such as paying an electric charge of another consumer with the electric power generated by the consumer.

Conventionally, there is known an electric power trading system capable of accommodating surplus electric power among a plurality of users (see, for example, Patent Document 1). In the system of Patent Document 1, when surplus power is generated in the second user during a predetermined time zone in which the first user needs power, the demand condition in the first user and the supply in the second user. By collating with the possible conditions and matching the corresponding combinations, it is possible to exchange surplus power among a plurality of users. A system such as Patent Document 1 can also be used by an aggregator as, for example, a system for electric power trading between customers including individuals.

In addition, the liberalization of electric power will enable those who have their own power generation facilities such as solar power generation to sell surplus electric power, and accordingly, the transfer of electric power to be bought and sold, that is, consignment (transmission in the connection supply contract). Services and other ancillary services) are provided. For example, consignment within the same power area is performed only by the power company in charge of the power area, and consignment across a plurality of power areas is performed between a plurality of power companies in charge of each power area.

By the way, there is a demand to reduce the burden of electricity charges on other consumers by consigning the electricity generated by themselves to other consumers, such as families living apart.

JP 2011-227837 JP 2001-243358

However, even if the same power is generated, the value of the power fluctuates depending on when and where it is generated and the supply-demand relationship at that time, so there is a problem that simply setting a uniform price does not meet the actual situation. On the other hand, since it is not possible to give information about the origin and market value of the power generation to the power itself, the value of the power at the time of power generation by one customer and the power by the other customer who is the consignee There is a need for a mechanism that can properly evaluate the value of electricity at the time of consumption and charge it fairly.

In view of the problems of the prior art, an object of the present invention is to consign the electric power generated by one consumer to another consumer, so to speak, when the electric power is remitted, each electric power at the time of power generation and at the time of power consumption. The purpose is to provide a power transmission system and method that can properly evaluate the value of electricity.

In order to solve the above problems, the power consignment system of the present invention
A power generation facility that generates electricity in a user system that controls and manages power for each unit of power consumption, a power storage facility that is connected to the user system through a power network and stores electricity generated by the power generation facility on the power network, and a power storage facility that stores electricity. Based on the information recording unit that records the market price of electricity at the time of electricity storage, the amount of electricity stored, and the information about the stored electricity storage equipment as electricity storage information, and the electricity storage information at a predetermined time unit. Then, the token issuing department that issues the electric energy transaction token including the electric energy and the consideration amount according to the evaluation of the electric energy stored in the electricity storage facility, and the user system, the ownership of the electric energy transaction token acquired by the user system is transferred to the electric energy. The power transaction related to the request according to the consignment request information from the consignment request department and the consignment request department that sends the consignment request information requesting the transfer to the power supplier to which the supply destination belongs. The token trading department that transfers the ownership of the token to the power supplier together with the consignment request information, and the power supplier side specifies the amount of power or consideration for the transferred power trading token based on the consignment request information. It is equipped with a consignment power supply unit that supplies power to the supplied destination.

The power consignment method of the present invention
(1) Power generation equipment generates power in a user system that controls and manages power for each unit of power consumption, and power storage equipment connected to the user system through a power grid stores electricity generated by the power generation equipment on the power grid.・ Power storage step and
(2) With respect to the electric power stored in the power storage equipment, the information recording unit provides information on the market price of the power at the time of storage, the amount of stored power, and the stored power storage equipment in a predetermined time unit. Information recording step to record as
(3) A token issuing step in which the token issuing unit issues a power transaction token including the amount of power and the amount of consideration according to the evaluation of the power stored in the power storage facility based on the information at the time of storage.
(4) In the user system, the consignment request department sends consignment request information requesting that the ownership of the power transaction token acquired by the user be transferred to the power supplier to which the power supply destination belongs by designating the power supply destination. Consignment request step and
(5) In response to the consignment request information from the consignment request department in the consignment request step, the token trading department transfers the ownership of the electric power transaction token related to the request to the electric power supplier together with the consignment request information.
(6) With the consignment power supply step in which the consignment power supply unit on the power supply side supplies the power amount or consideration amount equivalent to the transferred power transaction token to the supply destination specified based on the consignment request information. including.

In the above invention, it is preferable to further include a token canceling unit that cancels the power trading token based on the consumption of the power supplied based on the consignment request information.

In the above invention, a cooperation unit for recording token transaction history data regarding issuance and cancellation of electric power transaction tokens is further provided in cooperation with a guarantee system that stores at least a part of data regarding issuance, transfer and cancellation of electric power transaction tokens. The guarantee system includes a plurality of nodes that store at least a part of the token transaction history data, and the nodes aggregate and block the stored token transaction history data at a predetermined timing, and form a blockchain using the blocks. , It is preferable to share the blockchain among a plurality of nodes and store it as a distributed ledger.

In the above invention, it is preferable to further include a settlement unit that setstles the consideration paid or received by the current owner of the electric power transaction token based on the token transaction history data.

In the above invention, the guarantee system is a public address generated from a public key in public key cryptography to identify a specific user, and a private key that can be paired with the public key to identify the public key. It also has an address issuer that issues a private key used for electronic signatures of power transactions via addresses, and by adding a public key for the user who generated the purchase data based on the contract data, the power transaction token. The data including the public key related to the user who generated the purchase data is aggregated and blocked at a predetermined timing, a blockchain is formed using the blocks, and the blockchain is shared by multiple nodes. It is preferable to store it in the node as a distributed ledger.

According to the present invention, when the electric power generated by one consumer is consigned to the other consumer, so to speak, the electric power is remitted, the electric power is temporarily stored on the PPS side, and based on the market price of the electric power at the time of the electric power storage. The electricity trading token is issued and transferred to the consignee, and the electricity trading token is canceled based on the market price of electricity even when the electricity is consumed at the consignee. For example, the electric power stored in the power storage equipment installed on the PPS side of the consignment source is tokenized based on the market price at the time of the storage, and is consigned to another PPS through this token to send the power to any consumer. be able to. At the electricity market price at the time of consumption at the customer of the destination, the electricity charge for the customer of the destination can be covered by tokens. As a result, according to the present invention, the value of electric power can be properly evaluated and fair billing can be realized.

It is a conceptual diagram which shows the remittance of electric power in the electric power consignment system which concerns on embodiment. It is explanatory drawing which shows the role of the electric power transaction token in the electric power consignment system which concerns on embodiment. It is a conceptual diagram which shows the whole structure of the electric power consignment system which concerns on embodiment. It is a block diagram which shows the internal structure of the power control terminal which concerns on embodiment, (a) shows the power control terminal on the consumer side, (b) shows the power control terminal on the PPS side. It is a block diagram which shows the functional module which is executed in the power control terminal which concerns on embodiment. It is a block diagram which shows the internal structure of the token trading platform which concerns on embodiment. It is a block diagram which shows the internal structure of the guarantee system which concerns on embodiment. It is a flow chart which shows the procedure in the consigning source of the electric power consignment system which concerns on embodiment. It is a flow chart which shows the procedure in the consignment destination of the electric power consignment system which concerns on embodiment. It is a flow chart which shows the procedure at the time of token transfer of the electric power consignment system which concerns on embodiment. It is explanatory drawing which illustrates the relationship between the public key and the private key in the electric power consignment system which concerns on embodiment. It is explanatory drawing about the blockchain of the electric power consignment system which concerns on embodiment. It is explanatory drawing about the blockchain of the electric power consignment system which concerns on embodiment. It is explanatory drawing about the blockchain of the electric power consignment system which concerns on embodiment. It is explanatory drawing about the blockchain of the electric power consignment system which concerns on embodiment. It is explanatory drawing which shows the structure of each token and data of the electric power consignment system which concerns on embodiment.

An embodiment of the electric power consignment system according to the present invention will be described in detail with reference to the accompanying drawings. In addition, the embodiment shown below exemplifies an apparatus or the like for embodying the technical idea of the present invention, and the technical idea of the present invention describes the structure, arrangement, etc. of each component as follows. It is not specific to the thing. The technical idea of the present invention can be modified in various ways within the scope of claims.

(Overall configuration of power consignment system)
FIG. 1 is a conceptual diagram showing a transaction form in the consignment service according to the present embodiment, FIG. 2 is an explanatory diagram of each token according to the present embodiment, and FIG. 3 is an electric power consignment system according to the present embodiment. It is a conceptual diagram which shows the whole structure of.

In the present embodiment, as shown in FIG. 3, the electric power consignment service is provided by using the electric power transaction token through the electric power consignment system 1 constructed on the communication network 3. Specifically, as shown in FIG. 1, in this service, through the power control terminals 40 (40a, 40b) or 50 (50a, 50b) provided by each facility (customers 4a, 4b, PPS5a, 5b, etc.), respectively. , Access the token trading platform 2 to consign or buy and sell electric power via the electric power trading token. At the time of consignment or sale of electric power, an electric power transaction token, which is the value information of electric power, is issued, and the electric power transaction token is used between the consignment source PPS as a seller and the consignee PPS or a consumer as a buyer. To conclude a power sales transaction.

As shown in FIG. 2, this electric power trading token transmits the electric power generated by the consumer 4a, which is the consignment source, to the PPS5a, which is the consignment source, and the PPS5a side that receives the electric power receives or stores the electric power and its storage. A power trading token is issued according to the market price of power at the time of power reception or storage. Then, on the PPS5a side, the received power is related to the market price and marginal profit of the power (the market power price at the time of power reception, the cost required to procure the power from the consumer, and the lost power lost during storage. Taking into account the cost and the remaining capacity at the time of storage, the amount of profit calculated by adding the minimum required fee acquired by PPS) is calculated, and the power received from the user system of the consumer 4 is calculated. , Power selling and power storage are switched by switching the power transmission equipment or power storage equipment for selling power and selectively transmitting the power. The consumer 4a transmits electricity to the PPS 5a free of charge, and the consideration that should be paid for the transmitted electric power is used as a source of funds, and an electric power transaction token is issued as a virtual currency equivalent to the source of funds.

Then, when the consumer 4a as the consignment source wishes to remit the electric power to the consumer 4b as the consignment destination, the consumer 4a sends a consignment request to the PPS 5a by designating the consumer 4b as the consignment destination. And send. In this consignment request, in addition to information on the consignment destination, the amount or price of electric power desired for consignment can be set. The consignment request is transferred and traded with another PPS (here, PPS5b to be the consignment destination) or a consumer through the token trading platform 2 together with the electric power trading token equivalent to the installed electric energy or value. Finally, this electric power trading token is transferred to PPS5b, which is the consignment destination, as the right to use (consume) electric power, and the PPS5b that receives the transfer transfers the electric power equivalent to the electric power trading token to the consignment destination according to the consignment request. When the electric power is supplied to the consumer 4b and the electric power is actually consumed by the consumer 4b, the electric power transaction token equivalent to the consumed electric power is canceled. Here, the power transaction token is sent to the PPS5b, which is the consignment destination, together with the consignment request, and the PPS5b side executes the cancellation of the power transaction token accompanying the power supply. For example, as shown by the broken line in FIG. The electric power transaction token may be transmitted to the customer 4b as the consignment destination, and the electric power transaction token may be used as the electricity charge paid by the consumer 4b.

The value of this electric power trading token also fluctuates depending on the supply and demand balance of trading transactions on the token trading platform 2. As shown in FIG. 16, the electric power transaction token is associated with the amount of electric power, the transaction price of electric power at the time of electric power storage, and the origin information such as the power generation method, the power generation location, and the power generation time. , Transaction history including transfer history is also associated and held as additional information.

In addition, the electric power transaction token can be traded as an independent virtual currency separated from the consignment request. Contrary to the above example, when the consignment request is made from the PPS5b side to the PPS5a side, the PPS5b side has already made a consignment request. It is possible to pay the electricity charge for the consignment with the received electricity transaction token. In addition, regarding the electric power transaction token, it is possible to request the PPS that became the issuer to convert it into cash (cash) or electric power, including the canceled amount, and the PPS requested to be exchanged is the electric power transaction token. You will be obliged to pay the equivalent cash or send the equivalent power. As a result, the total amount of power trading tokens received by each PPS is compared, the same amount of power trading tokens is offset, and the difference is cashed and paid (cashed), or the shortage of power is transmitted interchangeably. It can be balanced by doing (purchasing electricity).

FIG. 3 is a diagram showing a network configuration of the power consignment system 1 according to the present embodiment. As shown in the figure, the electric power consignment system 1 is a token trading platform 2, and the electric power control terminals 40 (40a, 40b) or 50 (50a) provided in each facility (power plant, PPS, consumer, electric power prosumer, etc.). , 50b) and the like are connected to each other by the communication network 3. Further, on the communication network 3, a guarantee system 6 that provides a blockchain interface service that guarantees electric power transactions is provided.

The power control terminals 40 (40a, 40b) or 50 (50a, 50b) are composed of, for example, information processing terminals equipped with a CPU, and are facilities such as a power plant, each consumer, a PPS, a power prosumer, and an aggregator. It is a device that comprehensively controls the equipment of. The target equipment controlled by the power control terminals 40 (40a, 40b) or 50 (50a, 50b) includes a smart meter, a power storage device, and a PV included in a user system installed in a facility such as a consumer or a power processor. (Photovoltaics: photovoltaic power generation equipment) and other devices that manage power generation, storage, and power consumption are included. The various devices controlled by these power control terminals can be omitted if necessary. For example, in a consumer, the power consumption is measured by a smart meter 41, but some consumers have power generation equipment and power storage equipment, some have either power generation equipment or power storage equipment, or power generation. -Some have no power storage equipment and are provided with only a smart meter 41 and consume only power. In addition, although the electric power prosumer is also in a position to consume electric power, it is equipped with solar power generation and a storage battery and can be located on the side of supplying electric power.

The token trading platform 2 is provided by a content server device that mediates the power selling side and the power buying side to trade power via the power control terminals 40 (40a, 40b) or 50 (50a, 50b). This content server provides an intermediary website online as a token transaction platform 2, and various token transaction intermediary services are provided to power sellers, power purchasers, other markets and companies through the intermediary website. Is provided.

Then, by accessing the token trading platform 2 from the power control terminals 40 (40a, 40b) or 50 (50a, 50b), a power trading token trading service is provided according to power generation, storage, and power consumption in each facility or equipment. Can be used. This token trading service manages the issuance and sale of tokens by the seller and the purchase and cancellation of tokens by the buyer who consumes electricity. More specifically, the power control terminals 40 (40a, 40b) or 50 (50a, 50b) cooperate with the token trading platform 2 to generate power generation data, storage data, and consumption based on power generation, storage, and power consumption in each facility. Generate data and execute issuance, transfer transaction and cancellation of electric power transaction tokens containing information on the electric power. Each piece of information described in this power transaction token and the history of issuance / transfer / cancellation of the token are stored in the distributed ledger system in a non-tamperable state through the blockchain interface service by the guarantee system 6.

In addition, tokens that can be traded on the token trading platform can be exchanged equivalently to each other by the value determined by the supply and demand balance of trading transactions on the token trading platform, and tokens can be exchanged in other than the actual currency by settlement. , Virtual currency, points, and other value information with exchange value can be converted into cash.

The communication network 3 is an IP network using the communication protocol TCP / IP, and is a variety of communication lines (telephone line, ISDN line, ADSL line, public line such as optical line, dedicated line, WCDMA (registered trademark) and CDMA2000. In addition to 3rd generation (3G) communication methods such as LTE, 4th generation (4G) communication methods such as LTE, and 5th generation (5G) and later communication methods, Wifi (registered trademark) and Bluetooth (registered trademark) ) Is a decentralized communication network constructed by interconnecting wireless communication networks). This IP network also includes a LAN such as an intranet (internal network) by 10BASE-T or 100BASE-TX, or a home network.

(Configuration of each device)
Next, the configuration of each device will be described. The term "module" used in the description refers to a functional unit composed of hardware such as a device or device, software having the function, or a combination thereof, for achieving a predetermined operation. ..

(1) Consumer 4 (4a, 4b)
The consumer 4 (4a, 4b) has a user system as a whole electric power equipment, and this user system is also a unit for consuming electric power and may be equipped with equipment for power generation and storage. In the present embodiment, the consumer 4a as the consignment source and the consumer 4b as the consignment destination are connected via different general power transmission networks PNa and PNb. Examples of power generation equipment include solar power generation and wind power generation. In the present embodiment, it is assumed that the consumer 4a is provided with the solar power generation equipment and the consumer 4b is not provided with the power generation / storage equipment. These consumers 4 (4a, 4b) include a power control terminal 40 (40a, 40b) and a smart meter 41 (41a, 41b) as a performance data generation unit.

The power control terminal 40 installed in each user system is an information processing terminal provided with a communication function and a CPU, and various functions can be implemented by installing an OS, firmware, and various application software. Then, by installing and executing the application, it functions as a consignment interface 7. The information processing terminal can be realized by, for example, a smartphone or a dedicated device having specialized functions in addition to a personal computer, and includes a tablet PC, a mobile computer, and a mobile phone.

Specifically, as shown in FIG. 4A, the power control terminal 40 includes a CPU 402, a memory 403, an input interface 404, a storage device 401, an output interface 405, and a communication interface 406. Further, in the present embodiment, each of these devices is connected via the CPU bus 400, and data can be exchanged with each other.

The memory 403 and the storage device 401 are devices that store data in a recording medium and read the stored data according to the demands of each device. For example, a hard disk drive (HDD) or a solid state drive (SSD). It can be configured with a memory card or the like.

The input interface 404 is a module that receives control signals from each facility installed in the user system, and the received control signals are transmitted to the CPU 402 and processed by the OS and each application. On the other hand, the output interface 405 is a module that outputs a control signal to each facility installed in the user system. Each facility installed in such a user system differs depending on the form of the consumer, the processor, etc. For example, in the consumer, the power consumption is measured by the smart meter 41, and the power generation / storage is the photovoltaic power generation and the storage. Some have both power storage equipment, some have either solar power generation or storage battery equipment, and some do not have either power generation or power storage equipment. Further, in the prosumer, the power consumption is measured by the smart meter 41, and control signals for the photovoltaic power generation (PV) 42 and the storage battery 42 are input and output.

Here, the smart meter 41 is a performance data generation unit that comprehensively manages power generation, storage, and power consumption in the user system, which is a demand unit, measures power consumption in the consumer, and also in the user system. It also controls and manages power storage and power generation by other equipment such as storage batteries and solar power generation, and measures the amount of power generated, stored or consumed by consumers during each power usage period, and the actual data as shown in FIG. Generates D3 and periodically sends it to PPS, electric power companies, and token trading platform 2. The actual data D3 is transmitted directly to the PPS, the electric power company, and the token trading platform 2 via the Internet, a telephone line, a dedicated line, or the like.

The communication interface 406 is a module that transmits / receives data to / from other communication devices, and examples of the communication method include a telephone line, an ISDN line, an ADSL line, a public line such as an optical line, a dedicated line, and WCDMA (registered trademark). In addition to 3rd generation (3G) communication methods such as CDMA2000, 4th generation (4G) communication methods such as LTE, and 5th generation (5G) and later communication methods, Wifi (registered trademark), Bluetooth (registered trademark), Includes wireless communication networks such as (registered trademark).

The CPU 402 is a device that performs various arithmetic processes necessary for controlling each unit, and by executing various programs, various modules are virtually constructed on the CPU 402. An OS (Operating System) is started and executed on the CPU 402, and the basic functions of each power control terminal 40 are managed and controlled by this OS. In addition, various applications can be executed on this OS, and by executing the OS program on the CPU 402, various functional modules related to the electric power trading unit in the consumer are virtually constructed on the CPU.

In the present embodiment, by executing the browser software on the CPU 402, the information on the system is browsed and the information is input through the browser software. More specifically, this browser software is a module for browsing Web pages, and downloads HTML (HyperText Markup Language) files, image files, music files, etc. from the service provider 8 provided by PPS5 through the communication network 3. , Analyze the layout and display / play it. With this browser software, users can use forms to send data to a Web server, and application software written in JavaScript (registered trademark), Flash, Java (registered trademark), etc. can be operated. Therefore, through this browser software, each user can use the power consignment service through the service providing unit 8 provided by PPS5.

In the present embodiment, the interface 7 for power consignment is configured on the CPU 402 by executing the browser software on the CPU 402 and accessing the power consignment service provided by PPS5a through the browser software. The power consignment interface 7 is an interface module that performs a predetermined operation for receiving the consignment service. Specifically, as shown in FIG. 5, the power consignment interface 7 includes a performance data analysis unit 72, a storage information recording unit 73, a consignment request unit 74, and a communication control unit 71. The communication control unit 71 is a module that establishes communication with the service providing unit 8 on the PPS side and executes data transmission / reception.

The actual data analysis unit 72 acquires actual data from the smart meter 41 provided in each user system and analyzes the amount of electric power transmitted to the PPS side for storage and the amount of electric energy consumed in the consumer. It is a module for calculation, and the analysis result by the actual data management unit 26 is input to the power storage information recording unit 73, transmitted to the service providing unit 8 on the PPS side through the communication control unit 71, and used for issuing or canceling tokens. It is offered to.

The power storage information recording unit 73 describes the market price of the power at the time of storage, the amount of stored power, and the stored power storage equipment in a predetermined time unit with respect to the power stored in the power storage equipment 51 on the PPS side. Is a module that records as information at the time of electricity storage. This electricity storage information is transmitted to the storage information collection unit 82 of the PPS through the communication control units 71 and 81.

The consignment request unit 74 is a module that transmits consignment request information from the consumer side to the PPS side based on user operations. In the user system, this consignment request information is the supply destination by designating the customer 4b, which is the power supply destination, for the ownership of the power transaction token acquired by the self (the customer 4a) by storing the power in the PPS. This is the data requesting the transfer to PPS5b, which is the power supplier to which the power supply belongs. This consignment request information is transmitted to the consignment request acquisition unit 83 on the PPS side through the communication control units 71 and 81.

(2) PPS5 (5a, 5b)
PPS5 (5a, 5b) also has a user system as a whole electric power equipment, and this user system is also a unit for consuming electric power and may be equipped with equipment for power generation and storage. In the present embodiment, the PPS5a as the consignment source and the PPS5b as the consignment destination are connected via different general power transmission networks PNa and PNb. In this embodiment, it is assumed that the PPS 5a is provided with a power storage facility and the PPS 5b is not provided with a power generation / power storage facility.

The power control terminal 50 installed in each user system is an information processing terminal provided with a communication function and a CPU, and various functions can be implemented by installing an OS, firmware, and various application software. Then, by installing and executing the application, it functions as a power trading department. The information processing terminal can be realized by, for example, a smartphone or a dedicated device having specialized functions in addition to a personal computer, and includes a tablet PC, a mobile computer, and a mobile phone.

Specifically, as shown in FIG. 4B, the power control terminal 50 includes a CPU 502, a memory 503, an input interface 504, a storage device 501, an output interface 505, and a communication interface 506. Further, in the present embodiment, each of these devices is connected via the CPU bus 500, and data can be exchanged with each other.

As a function of the electric power control terminal 50 as an electric power trading unit, for example, as shown in FIG. 16, the electric power provision period, the electric energy amount (quantity), and the consideration amount (sale price or purchase price) are included in the sale data D21 or the purchase. The attached data D22 may be generated during a tradeable period, which is a predetermined period (for example, 24 hours) before the start of the power usage period.

The memory 503 and the storage device 501 are devices that store data in a recording medium and read the stored data according to the request of each device. For example, a hard disk drive (HDD) or a solid state drive (SSD). It can be configured with a memory card or the like.

The input interface 504 is a module that receives control signals from each facility installed in the user system, and the received control signals are transmitted to the CPU 502 and processed by the OS and each application. On the other hand, the output interface 505 is a module that outputs a control signal to each facility installed in the user system.

The communication interface 506 is a module that transmits / receives data to / from other communication devices, and examples of the communication method include a telephone line, an ISDN line, an ADSL line, a public line such as an optical line, a dedicated line, and WCDMA (registered trademark). In addition to 3rd generation (3G) communication methods such as CDMA2000, 4th generation (4G) communication methods such as LTE, and 5th generation (5G) and later communication methods, Wifi (registered trademark), Bluetooth (registered trademark), Includes wireless communication networks such as (registered trademark).

The CPU 502 is a device that performs various arithmetic processes necessary for controlling each unit, and by executing various programs, various modules are virtually constructed on the CPU 502. An OS (Operating System) is started and executed on the CPU 502, and the basic functions of each power control terminal 50 are managed and controlled by this OS. In addition, various applications can be executed on this OS, and by executing the OS program on the CPU 502, various functional modules related to the power trading unit in the PPS are virtually constructed on the CPU.

In the present embodiment, by executing the browser software on the CPU 502, the information on the system is browsed and the information is input through the browser software. In detail, this browser software is a module for browsing Web pages, downloads HTML (HyperText Markup Language) files, image files, music files, etc. from the token trading platform 2 through the communication network 3 and analyzes the layout. To display and play. With this browser software, users can use forms to send data to a web server, and application software written in JavaScript (registered trademark), Flash, Java (registered trademark), etc. can be operated. Therefore, through this browser software, each user can use the token transaction intermediary service provided by the token transaction platform 2.

In the present embodiment, the service providing unit 8 for the power consignment service is configured on the CPU 502 by executing the browser software on the CPU 502 and accessing the token trading platform 2 through the browser software. The service providing unit 8 is a module that executes various processes for consigning electric power and also generates electric power transaction token sale data or purchase data. In addition, the browser software can browse information (contract data, sale data, purchase data, etc.) related to tokens related to transactions by accessing the transaction history providing unit 64a of the guarantee system 6, thereby, for example. , You can browse the power generation method of the sold electric power and the transaction history of the electric power.

Specifically, as shown in FIG. 5, the service providing unit 8 for this service controls the communication control unit 81, the storage information collection unit 82, the consignment request acquisition unit 83, and the token transaction management unit 84. It includes a schedule management unit 85, a power supply status acquisition unit 86, a demand forecast unit 87, a market information collection unit 88, a charge / discharge control unit 89, and a consignment power adjustment unit 80. The communication control unit 81 is a module that establishes communication with the communication control unit 71 on the consumer side and executes data transmission / reception.

The power storage information collection unit 82 is a module that collects power storage information analyzed by the performance data analysis unit 72 and recorded in the power storage information recording unit 73 as power reception information on the PPS side. In this storage information, information on the market price of electric power at the time of receiving or storing power, the amount of electric power received or stored, and the stored power storage equipment is recorded in a predetermined time unit. The electricity storage information (including the power reception information) collected by the electricity storage information collection unit 82 is stored in the storage and input to the token transaction management unit 84 and the control schedule management unit 85.

The consignment request acquisition unit 83 is a module that acquires a consignment request from the consignment request unit 74 on the consumer side and extracts the consumer and PPS to be the consignment destination of the electric power in order to remit the electric power. The information extracted by the consignment request acquisition unit 83 is input to the token transaction management unit 84 and the control schedule management unit 85.

The token transaction management unit 84 is a module that requests the token transaction platform 2 to perform transaction processing such as issuance, transfer, cancellation, and cashing of electric power transaction tokens. Specifically, based on the power storage information (including power reception information) input from the power storage information collection unit 82, a request is made to issue a power transaction token equivalent to the power transmitted and stored from each consumer. Or, based on the consignment request acquired by the consignment request acquisition unit 83, the ownership of the electric power transaction token acquired by the consumer is specified by the customer 4b, which is the consignment destination of the electric power, and the electric power to which the supply destination belongs. Request to move to PPS5b, the supplier.

The control schedule management unit 85 is a module that manages the control schedule of all power services in PPS5 such as general power supply service, power generation service, power procurement, charge / discharge in power storage equipment, and consignment power adjustment (balancing). The control schedule management unit 85 contains the current power supply status input from the power supply status acquisition unit 86 and external information collected by the market information collection unit 88 (price fluctuations in the electricity market, weather information and other external environmental information, etc.). Is input, and based on the power supply and demand predicted by the demand forecasting unit 87 based on this information, a schedule for power generation, power supply, charging / discharging in the power storage facility, and other power procurement is created and managed.

The market information collection unit 88 is a module that collects external information (price fluctuations in the electricity market, weather information, other external environmental information, etc.) from external information sources distributed on a communication network. The market information collection unit 88 patrols external information sources on the communication network by so-called crawling processing and regularly collects predetermined information, and also searches for information sources on the communication network by related keywords, and suddenly. It also has a function to collect news and weather changes and store them as big data. The information collected by the market information collecting unit 88 is input to the demand forecasting unit 87 and used for demand forecasting, and the information on the market price of electric power is also sent to the electricity storage information collecting unit 82 and the token transaction management unit 84. It is input and used to record the consideration value at the time of receiving / storing power related to power receiving / storing, and to calculate the rate of power / token at the time of token transaction.

The demand forecasting unit 87 is a module that analyzes the correlation between the past supply and demand of electric power and external information and predicts the electric power supply and demand that will occur in the future. This forecast targets external information collected by the market information collection unit 88 and past changes in power demand as big data, and is being analyzed using AI (artificial intelligence) machine learning functions such as deep learning. The feature points of are accumulated, the correlation (trend) between each information is extracted based on the commonality of the feature points, and the future power demand is predicted from the commonality of the feature points that match the current market condition information.

The charge / discharge control unit 89 is a module that controls the drive of the power storage equipment owned by the PPS according to the control by the control schedule management unit 85. The power supply status acquisition unit 86 is a module that acquires and monitors the power supply status in the PPS and inputs the current status to the control schedule management unit 85. The power supply status acquired by the power supply status acquisition unit 86 is input to the market condition information collection unit 88 together with the home country information, and is provided for the demand forecast by the demand forecast unit 87.

The consignment power adjustment unit 80 is a module for accommodating power related to consignment power and transferring various expenses through a power transaction token with other power companies and PPS belonging to the general power transmission network. .. That is, the electric power transaction token can be traded as an independent virtual currency separated from the consignment request. For example, when a consignment request is made from the PPS5a side to the PPS5b side, the electric power transaction pooled on the PPS5a side. The tokens are used to pay the electricity charges for the consignment, transmit the shortage, and purchase the electricity to adjust the electricity (balancing).

(3) Configuration of Token Trading Platform 2 Token Trading Platform 2 is a trading market virtually constructed on a brokerage server managed and operated by a provider of electric power trading brokerage services, and users who wish to buy and sell electric power can use it. , The token trading platform 2 can be accessed through the communication network 3, and transactions related to electric power can be executed through the token trading platform 2. Specifically, as shown in FIG. 6, the intermediary server includes a communication interface 23, an authentication unit 22, an electric power transaction execution unit 25, a token management database 21a, a user database 21b, a performance management database 21c, and an electric power transaction. It includes a management database 21d, a token management unit 24, a performance data management unit 26, and a settlement unit 27.

The communication interface 23 is a module that transmits / receives data to / from other communication devices through the communication network 3. In the present embodiment, each power control terminal 50, a smart meter 41, and a guarantee system 6 are used to provide the service. It is connected to the.

The authentication unit 22 is a computer that verifies the validity of the accessor involved in the electric power transaction or software having the function thereof, and executes the authentication process based on the user ID that identifies the user. In the present embodiment, the user ID and password are acquired from the terminal device of the accessor through the communication network 3, and the user database 21b is collated to determine whether or not the accessor has the right, and the accessor is the person himself / herself. Check if there is any.

The electric power transaction execution unit 25 is a module that mediates electric power transactions through the communication network 3, and in the present embodiment, includes a contract data generation unit 25a and a guarantee system cooperation unit 25b.

The contract data generation unit 25a generates contract data D1 of a transaction established based on the sale data D21 and the purchase data D22. More specifically, the electric power transaction execution unit 25 collates the demand condition in PPS5b and the supplyable condition in PPS5a, the sale data D21 and the purchase data D22, and concludes the transaction by matching the corresponding combinations. As shown in 16, the contract data D1 that describes information such as the supply source, the power generation method, the supply available time, and the power price, which are the demand conditions and supply availability conditions of the completed transaction, is generated.

The guarantee system cooperation unit 25b requests the guarantee system 6 on the network to perform the processing necessary for the power transaction, such as credit related to the power transaction, security management, and storage of transaction records, and cooperates with the guarantee system 6. It is a module that advances processing. The electric power transaction execution unit 25 manages the exchange of various tokens by coordinating with the guarantee system 6 through the guarantee system cooperation unit 25b, adds a public address regarding the token acquirer, and is proved by each token. Transfer each ownership by changing the owner of each right.

The token management unit 24 is a module as a token trading unit that executes, transfers, and cancels various tokens, and manages various tokens in cooperation with the guarantee system cooperation unit 25b of the electric power transaction execution unit 25. Update the data in various tokens to issue, transfer or cancel. Specifically, the token management unit 24 includes a token issuing unit 24a, a token canceling unit 24b, and a token transfer unit 24c.

The token issuing unit 24a is a module that issues various coin tokens to the user in response to the user's request. For example, based on actual data, a power transaction token is issued to a user who has power that can be sold by a power generation facility or a power storage facility.

The token cancellation unit 24b is a module that subtracts at least the consideration amount included in the electric power transaction token by the amount of power consumption based on the actual data D3. Here, the cancellation of the token refers to the process of subtracting or losing the exchange value as currency, such as setting the value to 0 or deleting or unknown the private key and storing it in an account that makes it impossible to rewrite the owner. ..

The token transfer unit 24c is a module that controls the transfer of tokens by rewriting the ownership of each token, and in the present embodiment, the blockchain interface service is used for this rewriting. The transfer of this token is carried out on the basis of a transfer request directing the transfer. This transfer request is data that is input from the electric power transaction execution unit 25 when the sale and purchase of tokens is completed in, for example, the electric power transaction execution unit 25, or is directly input from the electric power control terminal 40 by each user's operation. Includes the type of token that is the target of the transfer, account information about the transfer source and transfer destination, and the quantity.

The token management database 21a is a storage device that stores information on tokens that have been issued or canceled, and stores the owner of each token in association with its type and value or quantity. In addition, related information such as transaction history related to each token is also recorded in association with each token.

The user database 21b is a storage device that stores information about users of each consumer and vendors such as aggregators. In the present embodiment, the personal information that identifies the user himself / herself is not stored in the user database 21b, and only the public account information that identifies each resident / user is stored. The credit information required for electric power trading is evaluated by requesting the guarantee system 6 for credit regarding the public account belonging to each resident and responding to it.

The performance management database 21c is a storage device that collects, accumulates, and manages performance data by persons involved in the transfer of electric power, such as power plants, consumers, and aggregators. Each performance data received from each smart meter is accumulated in this performance management database and used for token issuance, cancellation, and value evaluation. The electric power transaction management database 21d is a storage device that records the transaction record of tokens.

At least a part of the data stored in each of these databases 21a to 21d is recorded in the guarantee system 6 through the guarantee system cooperation unit 25b. The guarantee system 6 aggregates at least a part of the data accumulated in each of the databases 21a to 21d at a node to block them at a predetermined timing, forms a blockchain using the blocks, and forms a blockchain, and a plurality of the blockchains are formed. Share it with nodes and store it as a distributed ledger.

The actual data management unit 26 is a module that calculates the type and quantity of tokens to be issued by collecting and analyzing actual data from each user system, and the analysis result by the actual data management unit 26 is token management. It is input to the unit 24 and used for issuing and canceling tokens. Specifically, the performance data management unit 26 includes a value evaluation unit 26a and a failure determination unit 26b.

The value evaluation unit 26a includes measured values of the amount of power generated or consumed by each user during each power usage period, power generation data indicating the power generation method and the user who generated the power, or the amount of power generation and the storage period thereof, which are included in the actual data. Analyze the electricity storage data related to. The token management unit 24 issues or cancels the electric power transaction token based on the analysis result by the value evaluation unit 26a.

Further, the actual data includes the type of power generation or storage related to the consumed electric power, and the value evaluation unit 26a analyzes the actual data and converts the electric power according to the power generation type having a high degree of contribution to the environment to the environment. The state of electricity storage by the type of electricity storage with a high degree of contribution is extracted, the amount of power and the time zone are calculated, and the value is evaluated.

The settlement unit 27 is a module that cashes in according to the market value of various tokens, and by acquiring information on the market value of various tokens from the network and making a settlement, virtual currency, points, and other exchanges are made in addition to the actual currency. Convert to value information that has value. In addition, the settlement unit 27 generates or acquires definite data including a definite value of the amount of power generated or used by each user during each power use period and the amount of consideration related to the amount of power, as shown in FIG. , It also has a function to settle the consideration paid or received by each user based on the confirmed data.

(4) Configuration of Guarantee System 6 As described above, in the present embodiment, power transactions and token transactions are guaranteed by being arranged between the power control terminals 40 on the power selling side and the power purchasing side that perform power transactions via various tokens. A guarantee system 6 is provided. Specifically, as shown in FIG. 7, the guarantee system 6 includes a communication interface 63, an authentication unit 62, a token transaction execution unit 64, a token transaction history database 61a, a key information database 61b, and an account database 61c. It has.

The communication interface 63 is a module that transmits / receives data to / from other communication devices through the communication network 3, and is connected to each token trading platform 2 and each power control terminal 40 in the present embodiment. The authentication unit 62 is a computer that verifies the validity of the accessor or software having the function thereof, and executes the authentication process based on the user ID that identifies each user. In the present embodiment, the accessor is notified of the user by acquiring a user-specific public address, public key, user ID, password, etc. from the accessor's power control terminal 40 through the communication network 3 and collating the key information database 61b. Check whether you have the right and whether the accessor is the person.

The token transaction execution unit 64 is a module that handles electric power transaction tokens that tokenize the right to sell or consume electric power as virtual coins. This token is tied to the public account of each legitimate owner, and by presenting the relationship of the public account, it is possible to prove that the token is the legitimate right holder, and the legitimate right holder. Otherwise, it is not possible to carry out transfer procedures such as transfer of the token. In the present embodiment, the token transaction execution unit 64 includes a guarantee system cooperation function, a public address management unit 64b, a validity verification unit 64c, and a data update unit 64d.

The guarantee system linkage function is requested by the device of another service institution, for example, the token trading platform 2 to perform processing related to token trading such as credit related to electric power trading, security management, transaction record, and storage of service history, and each of these devices. It is a module that proceeds with processing in cooperation with. Further, in the present embodiment, the guarantee system linkage function provides information such as transaction values of various tokens to the token transaction platform 2.

The public address management unit 64b is a public address generated from a public key in public key cryptography for identifying a specific user, and a private key that can be paired with the public key to identify the public key. It functions as an address issuing unit that issues private keys used for electronic signatures of electric power transactions via public addresses, and these issued public addresses and key information related thereto are stored in the key information database 61b.

The validity verification unit 64c is a module that verifies that various tokens related to token trading or electricity trading belong to the current owner through legitimate trading and that they have not been tampered with, and is linked to a public account. The validity of the token can be confirmed by the attached public key of the current owner, and all transactions related to the token are stored in the token transaction history database 61a as token transaction history data, and the public key. The token transaction history database 61a can be collated based on the above to confirm its validity.

The data update unit 64d transfers the ownership of the token by acquiring the power information related to various tokens, adding the public address regarding the new token owner, and changing the token owner proved in the distributed ledger. It is a module. The data update by the data update unit 64d is protected by a high degree of security, and double transfer and falsification of the transaction history are strongly protected.

(Operation of power consignment system)
By operating the power consignment system described above, it is possible to provide a power consignment service using the power consignment method of the present invention. FIG. 8 is a flow chart showing a procedure at a consignment source of a power consignment system, and FIG. 9 is a flow chart showing a procedure at a consignment destination of a power consignment system. The processing procedure described below is only an example, and each processing may be changed as much as possible. Further, with respect to the processing procedure described below, steps can be omitted, replaced and added as appropriate according to the embodiment.

As shown in FIG. 8, first, the consignment source consumer generates power using the power generation facility 0 of the user system (S101). At this time, power generation data, electricity storage data, and power consumption data are generated, and these data are aggregated by the smart meter 41 and reported to the PPS5a side as actual data. The actual data collected from each user system is aggregated for each user system in PPS5a.

Next, a storage request is transmitted from the consumer on the consignment source side to the consignment source PPS5a (S102), and upon receiving this storage request (S201), power transmission for storage is started from the consumer 4a and the PPS5a side. Power is sold or stored at. More specifically, on the PPS5a side, the received power is the market price and marginal profit of the power (the market power price at the time of power reception, the cost required to procure power from the consumer, and the lost power lost during storage. The amount of power calculated by adding the minimum required fee to be acquired by PPS, taking into consideration the cost related to electricity storage and the remaining capacity at the time of electricity storage), and received power from the user system of consumer 4. Electricity is switched between selling and storing electricity by selectively transmitting electric power by switching the power transmission facility or the electricity storage facility for selling electricity. Then, the recording of the power receiving information or the electricity storage information is also started (S202). When this power reception or storage is started, market condition information is collected every predetermined unit time (S203), and each time the power per unit time is received or stored, the amount of power received or stored and the market price. Issuance of a power trading token having a value corresponding to the price is executed (S204).

Here, it is assumed that the power consignment request is transmitted from the consignment source consumer 4a (S104). In response to this power consignment request, the consignment source PPS5a transfers the received power consignment request to the consignment destination PPS (here, PPS5b) (S205), and executes a transfer transaction of the power transaction token at the value required for consignment (S205). S206). At the time of the transfer transaction of the electric power transaction token, the guarantee system executes the account process related to the token transfer (S207), and after the completion, executes the token transfer completion process for the consignor customer 4a (S105). Here, the electric power transaction token is sent to the PPS5b, which is the consignment destination, together with the consignment request, and the transfer transaction for that purpose is executed. For example, as shown by the broken line in FIG. In this case, the power consignment request is transferred to the consignment destination PPS5b, while the power transaction token at the value required for consignment executes the transfer transaction to the consumer 4b.

After a considerable number of consignment processes have been executed, a balancing procedure is executed with the consignment destination PPS5b and the general power grid (S208).

Next, the processing on the consignment destination side that received the transfer of the consignment request from the consignment source PPS5a will be described. As shown in FIG. 9, the transfer destination PPS5b (S301), which has received the power transfer request, executes a transfer transaction of the power transaction token with the transfer source PPS5a, and performs account processing related to token transfer in the guarantee system. Execute (S302, S303). As a result, the ownership of the power trading token issued by the consignment source PPS5a is transferred to the consignment destination PPS5b.

Then, in PPS5b, the electric power equivalent to the value described in the transferred electric power transaction token is supplied to the consumer 4b who is the transfer destination specified in the electric power consignment request (S304), and the market price of the electric power at the time of consumption is supplied. Etc. are recorded (S305). Power consumption data is generated for the power consumed by the customer 4b as the consignment destination (S306), and the power transaction token having a value corresponding to the power consumed based on the power consumption data is canceled (S307). The account processing related to token cancellation is also executed in the guarantee system for the canceled power transaction token (S308). In addition, after a considerable number of consignment processes have been executed, a balancing procedure is executed between the consignment destination PPS5a and the general power transmission network as necessary (S309). Then, at the consignment destination PPS5b, the electric power charge charged to the consumer 4b by the electric power transaction token related to the consignment is corrected, and the notification is transmitted to the consumer 4b (S310, S402).

(Operation at the time of token transfer transaction)
Here, the token transfer process in step S402 will be described in detail. FIG. 10 is a flow diagram illustrating a processing procedure at the time of transfer of the electric power consignment system according to the present embodiment, and FIG. 11 illustrates the relationship between the public key and the private key according to the present embodiment.

In the present embodiment, the token transfer process and the account process related to the token transfer use the mechanism of the distributed ledger system according to the present embodiment. Here, a case where the PPS5a sells the electric power trading token to the new PPS5b through the token trading platform will be described as an example. As shown in FIG. 10, the electric power sales transaction includes a public address and private key issuance step S501, a related service history information registration process S502, and a right transfer process execution step S503.

First, in step S501, in the token trading platform 2, the public address management unit 64b functions as an address issuing unit, and the public address management unit 64b has a consignment public address PA3 unique to the token trading platform and the consignment public address. A pair with the private key SK3 corresponding to PA3 is issued. Specifically, as illustrated in FIG. 11, the token trading platform 2 uses a random number generator or the like to perform a private key SK3 associated with a public address unique to the token trading platform by public key cryptography. Generate. The random number generator may be built in the public address management unit 64b as a program, for example. As described above, this private key SK3 is used for electronic signature of a transaction (here, sale from the token trading platform to PPS5b) using the paired public public address PA3 for consignment as a power transfer source.

Next, the token trading platform 2 generates a public key PK3 from the private key SK3 based on an electronic signature algorithm such as an elliptic curve DSA (Elliptic Curve Digital Signature Algorithm, ESDSA). The generated public key PK3 and private key SK3 form a key pair in the public key cryptosystem, and although it is possible to generate the public key PK3 from the private key SK3 due to the nature of this public key cryptosystem, the public key PK3 It is impossible to generate the private key SK3 from the viewpoint of the amount of calculation. That is, the private key SK3 cannot be specified from the public key PK3, but the public key PK3 can be specified from the private key SK3. The type of electronic signature algorithm to be used is not limited to the elliptic curve DSA, and may be appropriately selected depending on the embodiment.

Subsequently, the token trading platform 2 generates a public address PA3 for consignment from the public key PK3 by applying a one-way hash function such as SHA-256 or RIPEMD-160 to the public key PK3. For example, the token trading platform 2 can generate the public address PA3 for consignment by applying SHA-256 to the public key PK3 twice. That is, the consignment public address PA3 is a hash value of the public key used for signing the transaction described above, and is used to identify the transfer destination and transfer source of the token. Since a one-way hash function is used to generate the public address PA3 for consignment, it is possible to generate the public address PA3 for consignment from the public key PK3 as shown in FIG. It is impossible to generate the public key PK3 from the address PA3.

In the next step S502, the transaction history data associated with each token, such as the history of the service provided by the power seller PPS5a to the power token trading platform, is linked to the public address PA3 for consignment generated in step S501. To record to the node. Specifically, as illustrated in FIG. 10, the actual data acquired by the token trading platform 2 and the like are linked to the public consignment address PA3 and made public. This actual data can be freely viewed as long as the public key PK3 related to the public address PA3 for consignment is obtained. As a result, anyone can verify fraudulent acts such as fraudulent or falsified in the history or transaction history of the power generation method, power generation location, etc. from which the electric power is derived.

After that, in step S503, the token trading platform 2 trades the right transfer to the consignment public address PA3 generated in step S501 in accordance with the predetermined power transfer conditions. Then, when the transfer is completed, the token trading platform 2 ends the process related to this operation example. Here, an application executed on the power control terminal 40 or the like is used for exchanging various tokens according to the present embodiment. Therefore, in FIG. 10, an application that executes the token trading mechanism is also installed in the public address management unit 64b of the token trading platform 2, and the public address for consignment managed by the platform is controlled by this application. ..

While the power token belongs to PPS5a, the token is associated with the PPS5a power control terminal 40, the PPS5a-specific public address PAa is associated with the paired private key SKa, and the transfer procedure in the token trading platform. When the token is taken, the PPS5a temporarily transfers the token from the public address PAa (transfer source) to the consignment public address PA3 (transfer destination) generated by the electric power trader in step S501 by using the power control terminal 40. Can be relocated and pooled.

On the other hand, PPS5b, who wishes to purchase new electric power, obtains the public key PK3 to which the electric power transaction token is associated by using its own electric power control terminal 40b, as illustrated in FIG. , The PPS5b can browse power generation data and transaction progress information related to electric power associated with the public address PA3 for consignment of the token trading platform, and related electric power-specific history.

Specifically, an application is also installed in the power control terminal 40 of PPS5b, and the public address PAb owned by PPS5b is managed by this application. The public address PAb is associated with its own private key SKb, which allows the token to be further transferred from its own public address PAb to another person. That is, each private key SKb allows the PPS5b to freely use the token stored in the public address PAb and its transaction history. Here, the PPS 5b uses the application in the power control terminal 40 to receive the token transferred from the power-specific consignment public address PA3 to the public address PAb.

(Operation of warranty system)
Here, the mechanism of the distributed ledger system adopted in the above-mentioned guarantee system will be described in detail. In the present embodiment, the guarantee system 6 provides a blockchain interface service, which includes a plurality of nodes for storing at least a part or all of the data generated by each customer 4 or the token trading platform 2. , These nodes aggregate and block the stored data at a predetermined timing, form a blockchain using the block, share the blockchain with a plurality of the nodes, and store it as a distributed ledger.

Specifically, as shown in FIG. 12, the power consignment system 1 according to the present embodiment performs public key PKa and private key SKa based on public key cryptography through the guarantee system 6 when issuing, transferring, and canceling various tokens. Along with issuing the key pair with, the public address PAa is generated from the public key PKa corresponding to the issued token. This public address PAa is used as an address indicating the transferee (PPS5b) and the transferor (PPS5a) in the electric power transaction contract, while the private key SKa is used for the electronic signature of the transaction whose transfer source is the public address PAa. To.

The electric power transaction according to the present embodiment is performed between two nodes on the P2P (Peer-to-Peer) network 30 (here, between PPS5a and PPS5b), and the transaction information is from each node 90a in the P2P network 30. It will be broadcast and shared on 90f. As a result, a transaction history database (so-called blockchain) by the distributed ledger system is formed on the P2P network 30, and transaction histories of various tokens and electric power transactions are stored.

In the present embodiment, the transaction history database by this distributed ledger system executes, approves, and manages the electric power transaction contract when rewriting the owners of various tokens through the token transaction platform 2. The electric power transaction intermediary (each electric power control terminal 40) generates a public address PA3 for consignment unique to the token transaction platform (intermediary server) 2 in order to mediate the transaction between PPS5a and PPS5b, and makes a transaction. Assuming that the target token is temporarily deposited in the token pool of the token trading platform, the transfer of tokens will be relayed.

Then, the parties to the transaction (PPS5a and PPS5b) temporarily receive the token by transferring the token from the current PPS5a to the public address PA3 for consignment peculiar to the token trading platform by using the electric power consignment system 1, and further for consignment. By transferring to the new PPS5b via the public address PA3, a sales contract for the power token trading platform between PPS5a and PPS5b is established.

As a result, the transferee, PPS5b, can receive the token at his / her public address PAb, and can view the service history associated with the public address PA3 for consignment and use the service. The public address may be issued by the token trading platform 2, or may be issued by software on each trading user terminal or by a server of an independent service management institution or financial institution. Here, the detailed mechanism of the transaction of the electronic cryptocurrency will be specifically described with reference to FIGS. 12 to 15. FIG. 12 exemplifies the definition of a transaction (transaction) relating to the issuance / transfer / cancellation of tokens, and FIGS. 13 to 15 exemplify a part of the token transaction history (blockchain).

The transaction history related to the issuance, transfer, and cancellation of each token is defined as a series of electronic signature chains illustrated in FIG. When transferring the transaction history to the next owner, the owner of each token digitally signs the hash value of the previous transaction and the hash value of the public key related to the next owner with his / her private key. Add what you have done to the token transaction history. For the calculation of these hash values, for example, a one-way hash function such as SHA-256 or RIPEMD-160 is used.

In FIG. 13, as a specific example of the transaction, various tokens are transferred from the owner Z to the owner A, transferred from the owner A to the owner B, and further transferred from the owner B to the owner C. Illustrated. In this case, when transferring the token from Owner A to Owner B, Owner A has the hash value of the transfer transaction from Owner Z to Owner A and the public key of the next owner, Owner B. Add the hash value digitally signed with the private key of owner A to the token.

The owner of the token after this transaction, including owner B, uses the public key of owner A to decrypt this digital signature, and the hash value of the transfer transaction from owner Z to owner A and the disclosure of owner B. By collating with the hash value of the key, it can be determined whether or not this transaction has been tampered with. Similarly, when transferring a token from Owner B to Owner C, Owner B receives the hash value of the transfer transaction from Owner A to Owner B and the public key of the next owner, Owner C. Add the hash value digitally signed with the private key of owner B to the token. This makes it possible to determine whether or not the transfer transaction from owner B to owner C has been tampered with.

Various tokens can be defined as a chain of such a series of digital signatures. Here, the hash value of the public key is the public address. That is, the tokens and the like stored in this public address can be transferred only to a person who can digitally sign an electric power transaction using this public address as a transfer source, that is, a person who has a private key corresponding to this public address. .. Therefore, the private key is generally kept secret so that it cannot be leaked to anyone other than the owner. Data such as tokens and transaction history related to them are stored at the public address associated with the current owner. In addition, since it is not possible to verify that any of the past owners of this token is using (multiple transfer) the token with this electronic signature alone, the token transaction according to the present embodiment cannot be verified. In the mechanism, the multiple use is prevented by using the mechanism called the blockchain illustrated in FIGS. 14 and 15.

As illustrated in FIGS. 14 and 15, each block recorded in a token or the like stores a plurality of transactions, a Nonce, and a hash value of the immediately preceding block. The nonce is a disposable random value used in encrypted communication, and among the nodes (minor) 60a to 60f, the node (minor) who first discovers this value blocks the block in which the nonce is discovered as an approver. Update the blockchain by adding it to the end of the chain. As a result, a consistent transaction history is recorded in the blockchain, and by sharing this blockchain among all the nodes 90a to 90f participating in the P2P network 30, the consistent transaction history can be recorded in the entire P2P network 30. Can be shared. That is, this blockchain bears a part or all of the token transaction history database 61a and the key information database 61b in the guarantee system 6 described above. In the present embodiment, in the electric power transaction based on the public key cryptosystem, various tokens are traded by such a mechanism.

(Action / effect)
According to the present embodiment described above, when the electric power generated by one consumer 4a is consigned to the other consumer 4b, so to speak, the electric power is remitted, the electric power is temporarily stored on the PPS5a side of the consigning source side and the electric power is stored. The electricity trading token is issued based on the market price of electricity at the time and transferred to the consignee, and at least the consideration amount included in the electricity trading token is consumed based on the market price of electricity even when the electricity is consumed at the consignee. Subtract only the power. That is, it can be tokenized based on the market price at the time of electricity storage, consigned to another PPS through this token, and electric power can be sent to any consumer. At the electricity market price at the time of consumption by the customer 4b of the consignment destination, the electricity charge for the consumer 4b of the consignment destination can be covered by tokens. As a result, according to the present invention, the value of electric power can be properly evaluated and fair billing can be realized.

In particular, in this embodiment, since a distributed database mechanism is adopted as the guarantee system, it is not necessary to provide a strong single system management / operation facility for each business operator, and information is exchanged between the business operators. At that time, since the common database for linking information, privacy protection, and advanced security measures against data tampering are guaranteed by the mechanism of the distributed database, the equipment cost and the operation cost can be suppressed.

D1 ... Contract data D21 ... Sale data D22 ... Purchase data D3 ... Actual data PAa, PAb ... Public address PKa ... Public key PNa, PNb ... General power transmission network SKa, SKb ... Private key 1 ... Power consignment system 2 ... Token transaction Platform 3 ... Communication network 4 (4a, 4b) ... Consumer 5 (5a, 5b) ... PPS
6 ... Guarantee system 7 ... Power consignment interface 8 ... Service provision department 21a to d ... Database 22 ... Authentication department 23 ... Communication interface 24 ... Token management department 25 ... Electricity transaction execution department 26 ... Actual data management department 27 ... Settlement department 30 ... Network 40 ... Power control terminal 41 ... Smart meter 42 ... Storage battery 50 ... Power control terminal 61a-c ... Database 62 ... Authentication unit 63 ... Communication interface 64 ... Token transaction execution unit 71, 81 ... Communication control unit 72 ... Actual data analysis Department 73 ... Information recording unit at the time of electricity storage 74 ... Consignment request unit 80 ... Consignment power adjustment unit 82 ... Information collection department at the time of electricity storage 83 ... Consignment request acquisition department 84 ... Token transaction management department 85 ... Control schedule management department 86 ... Power supply status acquisition department 87 ... Demand forecasting unit 88 ... Market information collection unit 89 ... Charge / discharge control unit 90a to 90f ... Node

Claims (10)

Power generation equipment that generates electric power in a user system that controls and manages electric power for each unit of electric power consumption,
A power storage facility that is connected to the user system through a power grid and stores the power generated by the power generation facility on the power grid.
With respect to the electric power stored in the power storage equipment, an information recording unit that records the market price of the electric power at the time of storage, the amount of stored electric power, and information on the stored power storage equipment as information at the time of storage, in a predetermined time unit. ,
A token issuing unit that issues an electric power transaction token including an electric power amount and a consideration amount according to the evaluation of the electric power stored in the electric power storage facility based on the electric power storage information.
In the user system, a consignment request unit that sends out consignment request information requesting that the ownership of the power transaction token acquired by the user be transferred to the power supplier to which the supply destination belongs by designating the power supply destination. When,
In response to the consignment request information from the consignment request department, the token trading department transfers the ownership of the electric power transaction token related to the request to the electric power supplier to be the consignment destination together with the consignment request information.
The electric power supplier side is provided with a consignment power supply unit that supplies the transferred electric power amount or consideration amount of electric power corresponding to the electric power transaction token to the supply destination designated based on the consignment request information. Characterized power transportation system. The electric power consignment system according to claim 1, further comprising a token erasing unit that cancels the electric power transaction token based on the consumption of electric power supplied based on the consignment request information. In cooperation with the guarantee system that stores at least a part of the data related to the issuance, transfer and cancellation of the electric power transaction token, a cooperation unit that records the token transaction history data related to the issuance and cancellation of the electric power transaction token is further provided.
The guarantee system includes a plurality of nodes that store at least a part of token transaction history data.
The node aggregates and blocks the stored token transaction history data at a predetermined timing, forms a block chain using the block, shares the block chain with a plurality of the nodes, and stores it as a distributed ledger. The electric power consignment system according to claim 1 or 2. The electric power consignment system according to claim 1, further comprising a settlement unit for settlement of consideration paid or received by the owner of the current electric power transaction token based on the token transaction history data. The guarantee system is
A public address generated from a public key in public key cryptography to identify a specific user, and a private key paired with the public key that can identify the public key, and power via the public address. It also has an address issuing department that issues the private key used for electronic signatures of transactions.
Based on the contract data, the ownership of the power trading token is transferred by adding the public key for the user who generated the purchase data.
Data including a public key related to the user who generated the purchase data is aggregated and blocked at a predetermined timing, a block chain is formed using the block, and the block chain is shared by a plurality of the nodes to be a distributed ledger. The power consignment system according to claim 3, wherein the data is stored in the node. A power generation facility generates electric power in a user system that controls and manages electric power for each unit of electric power consumption, and a power storage facility connected to the user system through a power grid stores electric power generated by the power generation facility on the power grid.・ Power storage step and
The information recording unit records, in a predetermined time unit, the market price of the electric power at the time of the electric power storage, the amount of the electric power stored, and the information about the electric power stored in the electric power storage equipment as the information at the time of electric storage. Information recording steps to be done
A token issuing step in which the token issuing unit issues a power transaction token including a power amount and a consideration amount according to an evaluation of the power stored in the power storage facility based on the power storage information.
In the user system, the consignment request unit transmits consignment request information requesting that the ownership of the electric power transaction token acquired by itself be transferred to the electric power supplier to which the electric power supply destination belongs by designating the electric power supply destination. Consignment request step and
In response to the consignment request information from the consignment request unit in the consignment request step, the token trading department transfers the ownership of the power transaction token related to the request to the power supplier to be the consignment destination together with the consignment request information. Trading steps and
The consignment power supply step in which the consignment power supply unit on the power supply side supplies the transferred power amount or consideration amount of power corresponding to the power transaction token to the supply destination designated based on the consignment request information. An electric power consignment method characterized by including. The power transfer method according to claim 6, wherein the token cancellation unit further includes a token cancellation step of canceling the power transaction token based on the consumption of the power supplied based on the transfer request information. Further, the cooperation unit records the token transaction history data regarding the issuance and cancellation of the power transaction token in cooperation with the guarantee system that stores at least a part of the data regarding the issuance, transfer and cancellation of the power transaction token. Including
In the cooperation step, the guarantee system aggregates the stored token transaction history data into a plurality of nodes that store at least a part of the token transaction history data at a predetermined timing and blocks them, and uses the blocks to form a blockchain. The power consignment method according to claim 6 or 7, wherein the blockchain is formed and shared by a plurality of the nodes and stored as a distributed ledger. The power consignment method according to claim 6, wherein the settlement unit further includes a settlement step of settlement of the consideration paid or received by the owner of the current power transaction token based on the token transaction history data. In the cooperation step,
The address issuing unit of the guarantee system uses a public address generated from the public key in the public key cryptography to identify a specific user, and a private key that can identify the public key in pairs with the public key. Issuing a private key used for electronic signature of electric power transaction via the public address
By adding the public key for the user who generated the purchase data based on the contract data, the ownership of the power trading token is transferred.
Data including the public key related to the user who generated the purchase data is aggregated and blocked at a predetermined timing, a block chain is formed using the block, and the block chain is shared by a plurality of the nodes to be a distributed ledger. The power transfer method according to claim 8, wherein the data is stored in the node.