JP2020107202A - Power transaction system - Google Patents

Abstract

To promote the introduction and spread of renewable energy by encouraging power which contributes to environment to be consumed in a manner which contributes to the environment.SOLUTION: A user system 4 includes a result data generation section 40 which measures a power amount that each user generates or consumes in each power usage period, and generates result data. A relay server 2 includes: a token issuing section 24a which issues a power transaction token including a power usage period, a power amount, and a compensation amount, and an environmental value token that is an evaluation of a degree of contribution to the environment, on the basis of the result data; and a token cancellation section 24b which cancels the power transaction token on the basis of the result data. The result data generation section 40 further includes types of power generation or power storage pertaining to the consumed power in the result data. The token issuing section 24a increases the value of the environmental value token when power from a power generation type having a high degree of contribution to the environment is stored using a power storage type having a high degree of contribution to the environment on the basis of the result data.SELECTED DRAWING: Figure 6

Description

The present invention relates to a power trading system in which a plurality of user systems that control and manage power for each power consumption unit and an exchange system that executes buying and selling of power are connected by a communication network.

2. Description of the Related Art In recent years, electric vehicles (EVs) have entered the popularization stage, and the number of commercial EV trucks and the like deployed by a transportation company is increasing. Here, since quick charging of EV trucks is performed at about 50 kW, a so-called electric power peak that causes a rapid increase in electric power demand is generated, and such an increase in electric power peak is a cause of tight demand for contracted electric power. Therefore, the power cost of the operator is greatly affected.

On the other hand, conventionally, energy such as sunlight, solar heat, hydraulic power, wind power, biomass, and geothermal energy can be regenerated in a relatively short period of time even once used, and promotion of introduction and diffusion as energy that does not deplete resources. Is desired. Further, there is known an electric power trading system capable of exchanging surplus electric power including reusable energy such as solar power generation and wind power generation among a plurality of users (for example, refer to Patent Document 1). In the system of Patent Document 1, when surplus power is generated in the second user during a predetermined time period when the first user needs power, the demand condition in the first user and the supply in the second user The surplus power can be exchanged among a plurality of users by checking the possible conditions and matching the corresponding combinations.

JP2011-227837A

However, in the conventional electric power trading system as described above, even if the same electric power is generated, the power generation cost and the burden on the environment differ depending on when, where, who generated the power, and by which power generation method. However, it is difficult to properly evaluate the degree of contribution to the environment with uniform pricing based solely on the supply and demand relationship. Appropriate evaluation of the degree of contribution to the environment will lead to the proper use of renewable energy, which can promote the introduction and diffusion of renewable energy.

An object of the present invention is, in view of the problems of the related art, an electric power trading system that can promote consumption of electric power that contributes to the environment in a manner that contributes to the environment and promote introduction and diffusion of renewable energy. To provide.

In order to solve the above problems, in the above invention, a power trading system in which a plurality of user systems that control and manage power for each power consumption unit and a mediation server that mediates power trading are connected by a communication network. The user system includes a performance data generation unit that measures the amount of power generated or consumed by each user during each power usage period and generates performance data, and the mediation server uses the performance data based on the performance data. And a token issuing unit that issues an environmental value token, which is an evaluation of the degree of contribution to the environment, and a token canceling unit that cancels the power trading token based on actual data. The actual result data generation unit further includes the type of power generation or storage related to the consumed power in the actual result data, and the token issuing unit, based on the actual result data, generates the electric power according to the power generation type having a high contribution to the environment. , Increases the value of the environmental value token when the electricity is stored by the electricity storage type that has a high contribution to the environment.

In the above invention, the guarantee is further provided in cooperation with a guarantee system that stores at least a part of the data related to the issue and cancellation of the power transaction token and the environmental value token, and further includes a cooperation unit that records the data related to the issue and cancellation of the power transaction token. The system includes a plurality of nodes that store at least a part of the data generated by the user system and the mediation server, and the nodes aggregate the stored data at a predetermined timing into blocks and form blocks using blocks. However, it is preferable that the block chain be shared by a plurality of nodes and stored as a distributed ledger.

In the above invention, in response to a token transfer request that requests transfer of an electric power transaction token or an environmental value token, if the target of the transfer request is an electric power transaction token, the requested electric power transaction token is transferred, and the object of the transfer request When is an environmental value token, it is preferable to further include a token transfer unit for canceling the environmental value token relating to the request.

In the above invention, the token transfer unit further has a function of generating information about transfer included in the transfer request relating to the canceled environmental value token as a transfer history, and the cooperation unit records the transfer history in cooperation with the guarantee system. It is preferable to further have the function of

In the above invention, the achievement data generation unit further includes the electricity storage amount and the electricity storage data regarding the electricity storage period in the achievement data, and the token issuing unit generates the surplus power based on the achievement data including the electricity storage data. It is preferable to issue a power demand control token as a consideration.

Further, in the above invention, the guarantee system is a private key that is generated from a public key in the public key cryptosystem and is a private key that can identify the public key by pairing with the public address for identifying a specific user. The transfer request target is further provided with an address issuing unit that issues a secret key used for the electronic signature of the electric power transaction through the public address, and in response to the token transfer request that requests the transfer of the electric power transaction token or the environmental value token. When it is a power transaction token, the power transaction token related to the request is transferred, and when the target of the transfer request is the environmental value token, the environmental value token related to the request is canceled, and the power transaction token related to the transfer or the cancellation is performed. The data including the public key of the user to whom the environmental value token is transferred is aggregated at a predetermined timing into blocks, a block chain is formed using the blocks, and the block chain is shared by a plurality of nodes to create a distributed ledger. Is preferably stored in the node.

According to the present invention, based on the power generation time, place, and power generation method, the environmental value based on the origin of each power is appropriately evaluated to issue a token, and the power generated by a power generation type that has a high contribution to the environment is generated. , The value of the environmental value token to be issued is increased when the electricity is stored by the electricity storage type having a high contribution to the environment. As a result, it is possible to promote consumption of electric power that contributes to the environment, such as reusable energy, by a method that contributes to the environment, such as EV, and promote the introduction and diffusion of renewable energy.

In addition, since electric power transactions are performed using tokens such as electric power transaction tokens, environmental value tokens, and DR control tokens, energy management at each consumer is facilitated and optimal planned charging control such as peak cut can be performed. .. Further, since the token is used, it is possible to freely associate the supply destination and the demand destination in transaction units such as self-consumption, interchange of others, market trading, PPS provision, etc., compared with the market value. Further, by providing an API and a terminal for interfacing with the platform, it is possible to easily enter the platform. Furthermore, since the blockchain interface service is also implemented, it is possible to easily enter from an existing interface. As a result, according to the present invention, in the electric power trading market in which diversified electric power values are mixed, it is possible to perform charging and selling by linking the supply source and the demand destination while appropriately evaluating the value of electric power. ..

In an embodiment, it is a conceptual diagram in the case of using a token for energy management of an EV truck in a customer, such as a transportation company. It is a conceptual diagram which shows the whole transaction in the electric power trading system which concerns on embodiment. It is explanatory drawing of each token in the electric power trading system which concerns on embodiment. It is a conceptual diagram which shows the whole structure of the electric power trading system which concerns on embodiment. It is a block diagram which shows the internal structure of the power control terminal which concerns on embodiment. It is a block diagram which shows the internal structure of the mediation server 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 figure showing the procedure at the time of token issue of the electric power trading system concerning an embodiment. It is a flowchart which shows the procedure at the time of electric power sale and electric power consumption of the electric power trading system which concerns on embodiment. It is a flow figure showing a procedure at the time of token transfer of the electric power trading system concerning an embodiment. It is explanatory drawing which illustrates the relationship of the public key and private key in the power trading system which concerns on embodiment. It is explanatory drawing regarding the block chain of the electric power trading system which concerns on embodiment. It is explanatory drawing regarding the block chain of the electric power trading system which concerns on embodiment. It is explanatory drawing regarding the block chain of the electric power trading system which concerns on embodiment. It is explanatory drawing regarding the block chain of the electric power trading system which concerns on embodiment. It is explanatory drawing which shows the structure of each token and data of the electric power trading system which concerns on embodiment.

Embodiments of a power trading system according to the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below exemplify a device and the like for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure of each component, The layout is not specified as below. The technical idea of the present invention can be modified in various ways within the scope of claims.

FIG. 1 is a conceptual diagram when a token is used for energy management of an EV truck in a consumer such as a shipping company in the present embodiment. As shown in the figure, in the present embodiment, among the power generated by a solar power station, a wind power station, a power prosumer, a customer equipped with other power generation equipment, etc., with respect to surplus power that can be sold, Issue tokens according to the power system and power amount. The tokens can be accumulated in various token pools of the token trading platform and used for token trading, and can be settled for cash or used for cashback.

To be more specific, a power transaction token is issued for surplus power that can be sold according to the amount of power generated, and along with this power transaction token, the value of each power generation method and power storage method according to the degree of contribution to the environment. An environmental value token, which is information, is issued. The environmental value token is a token that is calculated and issued according to the degree of contribution to the environment, such as the amount of power consumed for personal consumption and the amount of CO ₂ reduction. In addition to the power transaction token, an environmental value token, which is value information corresponding to the degree of contribution of each power generation method and power storage method to the environment, is generated, and the economy by implementing the power demand control (DR control) A DR control token, which is value information as a consideration for generating surplus power according to the effect, is generated.

The environmental value token is a token that is calculated and issued according to the degree of contribution to the environment, such as the amount of electric power consumed for personal consumption and the amount of CO ₂ reduction. It cannot be traded and cannot be redeemed for cash. This environmental value token is erased at the time of transfer, a transfer history is issued that records the transaction history describing the fact of the transfer, and the issued transfer history is subject to the transfer transaction. The transfer history related to the canceled environmental value token is irrevocably recorded on the blockchain, which is a guarantee system, via the token trading platform.

In particular, as one of the evaluation methods of this environmental value token in the present embodiment, the power generation that has a high contribution to the environment based on the method of the generated power and the power generation or the type of the stored power that is consumed or stored. When the electric power according to the type is stored by the type of electric storage that has a high contribution to the environment, the value is increased. In the example shown in FIG. 1, electric power generated by reusable energy such as photovoltaic power generation is stored in a battery for an electric vehicle such as an EV truck of a transportation company, and when consumed, the environment by the reusable energy is used. Since there is a synergistic effect between the contribution and the environmental contribution by using the electric vehicle, environmental value tokens will be given as evaluations and the value will be increased.

The power transaction token, environmental value token, and DR control token issued in this way are granted to solar power plants, wind power plants, DR control establishments, etc., and settled for cash or cash back. Since it can be used, energy management for each consumer becomes easy, and optimal planned charging control such as peak cut can be performed.

(Overall structure of power trading system)
FIG. 2 is a conceptual diagram showing an entire transaction in the power trading system according to the present embodiment, FIG. 3 is an explanatory diagram of each token according to the present embodiment, and FIG. 4 is a power trading according to the present embodiment. It is a conceptual diagram which shows the whole structure of a system.

In the present embodiment, a service is provided through which an intermediary business for power sales transactions using tokens is performed through the power trading system 1 constructed on the communication network 3. Specifically, as shown in FIG. 2, in the present service, power trading terminals are accessed through a power control terminal provided in each facility (power plant, customer, aggregator, etc.) to perform power trading. At the time of this power sale transaction, together with the power transaction token that is the value information of the power, issue the DR (Demand Respons) control and the DR control token and the environmental value token that are the value information related to the environmental value, These tokens are exchanged between the seller and the buyer to establish a power and value-added trading transaction.

As shown in FIG. 3, for these tokens, first, a power transaction token is issued according to the amount of generated power and a power generation method, and the power that can be sold is a token transaction platform as a power transaction token equivalent to that power. It is stored in the electricity trading token pool of and is traded through these token pools. Finally, this power transaction token is purchased by a consumer or the like as a right to use (consumer) the power, and the purchased consumer or the like can use the power equivalent to that of the power transaction token. By consuming, the power trading token equivalent to the consumed power is canceled. The value of this power trading token varies depending on the supply and demand balance of the trading transaction on the token trading platform. As shown in FIG. 16, the power transaction token is associated with origin information such as the amount of power, the power generation method, the power generation location, and the power generation time when it is generated, and further, as additional information, from the power transaction token. Related token information such as derived environmental value tokens, transaction history including transfer history due to buying and selling, etc. are also associated and held. Each accumulated token can be traded as an independent virtual currency.

In addition to the power transaction token of the generated power, an environmental value token, which is value information corresponding to the degree of contribution of each power generation method and power storage method to the environment, is generated, and power demand control (DR control) is performed. A DR control token, which is value information as compensation for generating surplus power according to the economic effect of the implementation, is generated.

The environmental value token is a token that is calculated and issued according to the degree of contribution to the environment, such as the amount of power consumed for personal consumption and the amount of CO ₂ reduction. This environmental value token cannot be used as a target for market trading and cannot be redeemed for cash as it is. This environmental value token is erased when it is transferred, and the date and time when the transfer is performed, the transfer source (owner ID) and the transfer destination (new owner ID), and the transfer time as shown in FIG. A transfer history that records the value (value of consideration) and other transaction history is issued, and the issued transfer history is subject to the transfer transaction. In the transfer history of this environmental value token, the price and issuer of the environmental value token that has been canceled are recorded, and the transfer destination of the transfer transaction is added as a transaction history each time the transfer is made. Here, erasing a token refers to a process of erasing the exchange value as a currency, such as setting the value to 0, storing the secret key in an account in which the rewriting of the owner is impossible and making it impossible to rewrite it. Then, the transfer history of the erased environment token is irrevocably recorded in the blockchain, which is a guarantee system, via the token trading platform.

In addition, as one of the evaluation methods of this environmental value token, based on the method of generated power and the type of power generation or storage related to the consumed or stored power, the power generated by the power generation type that has a high contribution to the environment is determined. When the electricity is stored by the electricity storage type that has a high degree of contribution to the environment, it is possible to increase its value. For example, when electric power generated by reusable energy such as solar power is stored in a battery for an electric vehicle such as an EV truck and consumed, the reusable energy contributes to the environment and the environment by using the electric vehicle. Because of the synergistic effect with the contribution, it is possible to perform processing such as giving an environmental value token or increasing its value as its evaluation. Contributions to these environments (CO ₂ reduction amount and self-consumption amount) are held in the token as origin information and other related information, and are stored in the token management database 21a of the intermediary server 2 and each node of the blockchain interface. Retained.

In addition, by providing financial resources such as donations to the token trading platform, the environmental value token can be converted into renewable energy tokens that can be transferred and transferred, by the amount equivalent to the financial resources. For example, when a donation is made by a company to promote the spread of renewable energy, the amount equivalent to the donation amount of the environmental value tokens accumulated in the environmental value token pool of the token trading platform will be used as renewable energy tokens. At the same time as converting, the converted environmental value token is deleted. This renewable energy token can be permanently traded as a virtual currency having a value equivalent to the financial resources such as distributed donations. The value of this renewable energy token changes depending on the supply and demand balance of the trading transaction on the token trading platform.

For the DR control token, by analyzing the actual result data, for example, the actual value obtained by controlling the electric power over a certain period is calculated, and the amount of consideration is determined. In addition, the actual value that avoided (peak cut) power consumption during peak periods was calculated over a certain period of time, and when the peak power was below the maximum power set at the beginning of the month, the overpayment of power charges was made. Therefore, the amount of consideration for the DR control token may be determined by using the overpaid electric power charge as an economic effect component. As shown in FIG. 16, the information on this is held in the token, and also held in the token management database 21a of the intermediary server 2 and each node of the block chain interface. By issuing this DR control token to a company or the like that has performed DR control, it is possible to cash back the power charge for power saving. In addition, the DR control token can be permanently traded as a virtual currency having a value equivalent to the overpaid electricity rate. The value of this DR control token also fluctuates depending on the supply and demand balance of the trading transaction on the token trading platform.

In the example shown in FIG. 2, a power plant, a power prosumer, a customer equipped with a power generation facility, or an aggregator that coordinates these customers provides power and acquires a power transaction token according to the amount of power generation. At this time, the environmental value token and the DR control token are also acquired according to the degree of contribution to the environment due to the power generation method of the electric power and the power generation time (season or time zone) and the economic effect of the DR control. The acquired various tokens can be redeemed for cash, and pooled in each token pool so that they can be sold to another person and received the consideration. An aggregator is a business operator that bundles and aggregates the power demands of customers to effectively provide energy management services, and controls the balance between the demand and supply of power between the power company and the consumers. Implement DR control. The aggregator can acquire the DR control token by performing the DR control, and can settle the money for cash or accumulate it in the token pool for trading transactions.

On the other hand, electric power supplied from a customer equipped with a power plant, a power prosumer, and a power generation facility is supplied to the customer when the customer who is the demander purchases a power transaction token. This power supply can be performed via PPS (Power Producer and Supplier). As the purchased power is consumed by each consumer, the power trading token used for the purchase is incinerated. On the other hand, each token accumulated in each token pool can be traded as an independent virtual currency with an aggregator, PPS, consumer, company or other trading market through a blockchain interface service. Also in this case, various tokens can be redeemed for cash and sold to another person to receive the consideration.If the token is a power transaction token, it is linked to the power transaction token. It is possible to receive power from a power supply source.

FIG. 4 is a diagram showing a network configuration of the power trading system 1 according to the present embodiment. As shown in FIG. 1, a power trading system 1 includes a mediation server 2 that provides a token trading platform, and a power control terminal 40 provided in each facility (power plant, PPS, consumer, power consumer, etc.) in a communication network 3. Are connected to each other. Further, on the communication network 3, a guarantee system 6 that provides a blockchain interface service that guarantees power transactions is provided.

The power control terminal 40 is composed of, for example, an information processing terminal including a CPU, and is a device that centrally controls the facilities of each facility such as a power plant, each consumer, PPS, power prosumer, and aggregator. The target equipment controlled by the power control terminal 40 includes a smart meter 41, a storage battery 42, a PV (Photovoltaics) 43 included in the user system 4 installed in a facility such as a consumer or a power prosumer, and the like. It includes devices that manage power generation, storage, and power consumption. The various devices controlled by the power control terminal 40 can be omitted as necessary. For example, the power consumption of a consumer is measured by the smart meter 41, but some consumers have a power generation facility and a power storage facility, some have a power generation facility or a power storage facility, or a power generation facility. In some cases, only the smart meter 41 is provided without any storage equipment and only consumes power. Further, the power prosumer is also in a position to consume power, but it can be located on the side that supplies power, including solar power generation and a storage battery.

The mediation server 2 is a content server device that mediates between the power selling side and the power purchasing side trading power through the power control terminal 40. The intermediary server 2 provides an intermediary website online as a token trading platform, and through the intermediary website, various token trading intermediary services are provided to the power selling side, the power purchasing side, and other markets and companies. Are offered.

Then, by accessing the intermediary server 2 from the power control terminal 40, it is possible to use various token transaction services according to power generation, storage, and power consumption in each facility or facility. This token transaction service manages the issuance and sale of tokens by the seller Ua, and the purchase and cancellation of tokens by the buyer Ub, which is the power consuming side. More specifically, the power control terminal 40 cooperates with the intermediary server 2 to generate power generation data, power storage data, and consumption data based on power generation, storage, and power consumption in each facility, and various information describing the power. Issue, sell, and cancel tokens. The information described in each of the various tokens and the history of issuance, sale, and cancellation of the token are stored in the distributed ledger system in an unalterable state through the blockchain interface service provided by the guarantee system 6.

In addition, the tokens that can be traded on the token trading platform can be exchanged equivalently with each other at the value determined by the supply and demand balance of the buying and selling transactions on the token trading platform, and various tokens can be settled in the actual currency. In addition, it is possible to redeem virtual currency, points, or other value information having exchange value.

The communication network 3 is an IP network using the communication protocol TCP/IP, and various communication lines (telephone line, ISDN line, ADSL line, public line such as optical line, leased line, WCDMA (registered trademark) and CDMA2000. In addition to third-generation (3G) communication methods such as LTE, fourth-generation (4G) communication methods such as LTE, and fifth-generation (5G) and later communication methods, Wifi (registered trademark), Bluetooth (registered trademark) Wireless communication network) such as) is a distributed communication network constructed by connecting to each other. The IP network also includes a LAN such as an intranet (corporate network) based on 10BASE-T or 100BASE-TX or a home network.

(Structure of each device)
Next, the configuration of each device will be described. The “module” used in the description indicates a functional unit for achieving a predetermined operation, which is configured by hardware such as an apparatus or device, software having the function, or a combination thereof. ..

(1) User system 4
The user system 4 is a general electric power facility that each consumer or electric power consumer has, and may be a unit that consumes electric power and may be equipped with a power generation and storage facility. Examples of power generation equipment include solar power generation and wind power generation. The user system 20 includes a power control terminal 40 as a power trading unit and a smart meter 41 as a performance data generation unit.

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

Specifically, as shown in FIG. 5, 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. In the present embodiment, these devices are connected via the CPU bus 400, and data can be exchanged with each other. As a function of the power control terminal 40 as a power trading unit, for example, sale data D21 including a power supply period, a power amount (quantity), and a consideration amount (sale price or purchase price) as shown in FIG. Alternatively, the purchase data D22 may be generated during a tradable period, which is a predetermined period (for example, 24 hours) before the start of the power usage period.

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

The input interface 404 is a module that receives a control signal from each facility installed in the user system, and the received control signal is 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 varies depending on the form of the consumer or the prosumer, and for example, in the consumer, the power consumption is measured by the smart meter 41, and the power generation and storage is performed by the solar power generation and the power generation. Some have both power storage facilities, some have either photovoltaic power generation or storage battery facilities, and some do not have both power generation and power storage facilities. Further, in the prosumer, the power consumption is measured by the smart meter 41, and the control signal for the photovoltaic power generation (PV) 42 and the storage battery 42 is input/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 unit of demand, and measures the power consumption in the consumer as well as in the user system. Other facilities, such as storage batteries and storage and power generation by solar power generation, are also controlled and managed, and the amount of power generated, stored or consumed by each customer during each power usage period is measured, and actual data as shown in FIG. D3 is generated and periodically sent to the PPS, the electric power company, and the mediation server 2. The result data D3 is sent directly to the PPS, the electric power company, and the mediation server 2 via the Internet, telephone line, dedicated line, or the like.

The communication interface 406 is a module that transmits and receives data to and from other communication devices, and as a communication method, for example, a public line such as a telephone line, an ISDN line, an ADSL line, an optical line, a dedicated line, and WCDMA (registered trademark). And third-generation (3G) communication methods such as CDMA2000, fourth-generation (4G) communication methods such as LTE, and fifth-generation (5G) and later communication methods, as well as Wifi (registered trademark) and Bluetooth ( (Registered trademark) and other wireless communication networks are included.

The CPU 402 is a device that performs various arithmetic processes required to control each unit, and executes various programs to virtually construct various modules on the CPU 11. An OS (Operating System) is activated and executed on the CPU 402, and the basic functions of each power control terminal 40 are managed and controlled by the OS. Further, various applications can be executed on this OS, and various functional modules are virtually constructed on the CPU by the OS program being executed by the CPU 402.

In the present embodiment, by executing browser software on the CPU 402, information on the system is browsed and 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 mediation server 2 through the communication network 3 and analyzes the layout. Display and play. With this browser software, users can also use forms to send data to a Web server and run application software written in JavaScript (registered trademark), Flash, Java (registered trademark), etc. Through this browser software, each user can use the token transaction mediation service provided by the mediation server 2.

In the present embodiment, the power trading unit 402a is configured on the CPU 402 by executing the browser software on the CPU 402 and accessing the token trading platform provided by the mediation server 2 through the browser software. The power trading unit 402a is a module that generates sale data or purchase data for power trading tokens. Further, the browser software can browse the information (contract data, sale data, purchase data, etc.) relating to the token relating to the transaction by accessing the transaction history providing unit 64a of the guarantee system 6, and thereby, for example, , Power generation method of sold power and transaction history of the power can be browsed.

(2) Configuration of Mediation Server 2 The mediation server 2 is a server device managed and operated by a provider of a power trading mediation service, and a user who desires to buy and sell a power accesses the mediation server 2 through the communication network 3. Through the token trading platform provided by this intermediary server 2, it is possible to execute a trade relating to electric power. Specifically, as shown in FIG. 6, the mediation server 2 includes a communication interface 23, an authentication unit 22, a power transaction execution unit 25, a token management database 21a, a user database 21b, a performance management database 21c, and a power management database 21c. The transaction management database 21d, a token management unit 24, a performance data management unit 26, and a settlement unit 27 are provided.

The communication interface 23 is a module that transmits and receives data to and from other communication devices through the communication network 3. In the present embodiment, each power control terminal 40, smart meter 41, and guarantee system 6 for providing this service. It is connected to the.

The authentication unit 22 is a computer or software having the function of verifying the legitimacy of the access person involved in the power transaction, 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 access person through the communication network 3, and the user database 21b is collated to determine whether or not the access person has the right, and the access person is the person himself/herself. Check if there is any.

The power transaction execution unit 25 is a module that mediates power transactions through the communication network 3. In the present embodiment, the power transaction execution unit 25 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 the transaction completed based on the sale data D21 and the purchase data D22. More specifically, the power transaction execution unit 25 collates the sale data D21 and the purchase data D22, which are the demand condition of the buyer Ub and the supply possible condition of the seller Ua, and establishes a transaction by matching the corresponding combinations. 16. As shown in FIG. 16, contract data D1 describing information such as a supply source, a power generation method, a supply available time, an electric power price, etc., which are demand conditions and supply enable conditions of the established transaction is generated.

The assurance system cooperation unit 25b requests the assurance system 6 on the network to perform processing necessary for the electricity transaction, such as credit related to the electricity transaction, security management, and storage of transaction records, and cooperate with each other. It is a module that advances processing. The power transaction execution unit 25 manages the exchange of various tokens by cooperating with the guarantee system 6 through the guarantee system cooperation unit 25b, adds the public address regarding the token acquirer, and is certified by each token. By changing the owner of various rights, each ownership is transferred.

The token management unit 24 is a module that executes and manages generation (issue), transfer, and cancellation of various tokens, and issues, transfers, or cancels various tokens in cooperation with the guarantee system cooperation unit 25b of the power transaction execution unit 25. In order to execute, the data in various tokens is updated. Specifically, the token management unit 24 includes a token issuing unit 24a, a token revocation 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, issue an electric power transaction token to a user who has power that can be sold by a power generation facility, or analyze the actual data to derive from the electric power transaction token of the generated electric power. Depending on the economic effect of generating an environmental value token, which is value information according to the contribution of each power generation method and power storage method to the environment, and by controlling the power demand (DR control) A DR control token that is value information is generated.

In the present embodiment, the token issuing unit 24a issues the environmental value token based on the amount of CO ₂ reduction by the power generation method or the amount of self-consumption included in the performance data. For example, when the power generation method included in the performance data is based on reusable energy such as solar power generation or wind power generation, the token issuing unit 24a reduces the amount of power generated by the power generation method and the power generation method. CO ₂ reduction table data that lists the correspondence with the amount of CO ₂ that is stored is stored, and the CO ₂ reduction table data is referenced based on the amount of power generation included in the actual data, and the value of the environmental value token and Determine the quantity and issue the environmental value token of the determined price or quantity. The issued environmental value token is stored in the environmental value token pool as owned by the power generator included in the actual data.

In addition, for example, when the token issuing unit 24a uses the reusable energy such as the solar power generation or the wind power generation as the power generation method included in the performance data, and when the power is consumed at home, The private consumption table data that lists the correspondence between the amount of CO ₂ reduced by private consumption and the energy loss due to power transmission and distribution is held, and the private consumption table data is stored based on the private consumption amount included in the actual data. By referring to the value or quantity of the environmental value token, the environmental value token having the determined value or quantity is issued. The issued environmental value token is stored in the environmental value token pool as owned by the user who consumed it at home included in the performance data.

Furthermore, the token issuing unit 24a according to the present embodiment acquires the amount of donation, converts the amount of the acquired environmental value token corresponding to the acquired amount into a transactable renewable energy token, and converts the converted amount. It also functions as a renewable energy token issuing unit that cancels the environmental value token of. Specifically, the amount of money such as a donation and the power generation method to be donated are input as search conditions to the token issuing unit 24a, and the environmental value token of the power generation method corresponding to this search condition is token-managed. The environmental value token pool in the database 21a is searched. Then, the token issuing unit 24a extracts the corresponding environmental value token, distributes the input donation amount by the amount of the corresponding environmental value token, and obtains the environmental value token of the value corresponding to the distributed amount. Converted to renewable energy token, the converted renewable energy token is issued as the owner of the original environmental value token, and the issued renewable energy token is renewable energy as owned by the user who is the owner of the original environmental value token. It is accumulated in the token pool.

The token canceling unit 24b is a module that cancels the power transaction token based on the record data D3 or cancels the environmental value token related to the transfer request. Here, erasing a token refers to a process of erasing the exchange value as a currency, such as setting the value to 0, storing the secret key in an account in which the rewriting of the owner is impossible and making it impossible to rewrite it.

The token transfer unit 24c is a module that controls the transfer of tokens by rewriting the ownership of each token. In this embodiment, a blockchain interface service is used for this rewriting. The transfer of this token is performed based on the transfer request that directs the transfer. The transfer request is, for example, data input from the power transaction execution unit 25 when the token transaction is completed in the power transaction execution unit 25, or directly input from the power control terminal 40 by an operation by each user. Includes the types of tokens that are subject to, account information regarding the transfer source and transfer destination, and the quantity thereof.

In particular, when the input transfer request is a request to transfer an electric power transaction token or an environmental value token, the token transfer unit 24c sends the requested electric power transaction token when the transfer request target is an electric power transaction token. When the target of the transfer request is the environmental value token that has been transferred, the environmental value token related to the request is deleted by the token canceling unit 24b, and the information regarding the transfer included in the transferred request related to the deleted environmental value token is generated as the transfer history. It has a function. The transfer history relating to the canceled environment token is irrevocably recorded in the blockchain, which is a guarantee system, via the token trading platform.

The token management database 21a is a storage device that stores information about issued and revoked tokens, and stores the owner of each token and its type and price or quantity in association with each other. Various tokens are classified and accumulated as a power transaction token pool, an environmental value token pool, a DR control token pool, and a renewable energy token pool, according to their types. Further, related information such as transaction history regarding each token is also recorded in association with each token. For example, the transfer history issued at the time of transferring the environmental value token is also recorded in association with the environmental value token of the conversion source that is transferred and has a value of 0.

The user database 21b is a storage device that stores information about users of each customer and traders such as aggregators. In the present embodiment, personal information for identifying the user himself/herself is not stored in the user database 21b, but only public account information for identifying each resident/user is stored. The credit information required for power transactions requests credit for a public account belonging to each resident from the guarantee system 6, and is evaluated by the content of the response thereto.

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 is used for token issuance, cancellation, and value evaluation. The power transaction management database 21d is a storage device that records the token transaction record.

At least a part of the data accumulated in each of the databases 21a to 21d is recorded in the assurance system 6 through the assurance 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 predetermined timing at a node to form a block, forms a block chain using the block, and forms the block chain into a plurality of blocks. It is shared by the nodes and stored as a distributed ledger.

The performance data management unit 26 is a module for calculating the type and quantity of tokens to be issued by collecting and analyzing performance data from each user system. The analysis result by the performance data management unit 26 is token management. It is input to the section 24 and is 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 measures the measured value of the amount of power generated or consumed by each user during each power usage period, the power generation data indicating the power generation method and the user who generated the power, or the power storage amount and the power storage period, which are included in the performance data. Power storage data relating to The token management unit 24 issues or cancels the power transaction token, or issues the power transaction token and the environmental value token, based on the analysis result by the value evaluation unit 26a. Further, the token issuing unit 24a issues an environmental value token or a power demand control token as a consideration for generating surplus power, based on the analysis result of the performance data including the power generation data or the power storage data by the value evaluation unit 26a.

Furthermore, the performance data includes the type of power generation or storage related to the consumed power, and the value evaluation unit 26a analyzes the performance data and determines the power of the power generation type having a high contribution to the environment as the environment. The state in which electricity is stored according to the type of electricity with a high degree of contribution is extracted, the amount of electricity and the time zone are calculated, and value is evaluated. Based on the analysis result of the performance data by the value evaluation unit 26a, the token issuing unit 24a stores the environmental value token when the power generated by the power generation type having a high contribution to the environment is stored in the power storage type having a high contribution to the environment. Increase the value of.

The failure determination unit 26b is a module that analyzes the amount of power generated or consumed by each user during each power usage period, which is included in the performance data, and determines the occurrence of a failure in the user system based on the analysis result. Is. The result of the determination made by the failure determination unit 26b is recorded as tamper-proof on the block chain, which is a guarantee system, via the token trading platform.

The settlement unit 27 is a module for cashing according to the market price of various tokens, and by acquiring information on the market price of various tokens from the network and performing settlement, exchange of virtual currencies, points, etc. in addition to the actual currency. Convert to valuable information that has value. In addition, the settlement unit 27 generates or acquires fixed data including fixed values of the amount of power generated or used by each user during each period of power use and the amount of consideration related to the amount of power, as illustrated in FIG. 16. , It also has a function to settle the consideration paid or received by each user based on the confirmed data.

(3) Configuration of Guarantee System 6 As described above, in the present embodiment, the guarantee system 6 is arranged between the power control terminals 40 on the power sale side and the power purchase side that perform power transactions via various tokens, and guarantees power transactions and token transactions. A guarantee system 6 for performing the above is provided. Specifically, as shown in FIG. 7, the assurance 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. Equipped with.

The communication interface 63 is a module that transmits and receives data to and from other communication devices via the communication network 3, and is connected to each mediation server 2 and each power control terminal 40 in the present embodiment. The authentication unit 62 is a computer or software having the function of verifying the legitimacy of the access person, and executes the authentication process based on the user ID that identifies each user. In the present embodiment, the public address and public key unique to the user, the user ID, the password, and the like are acquired from the power control terminal 40 of the access person through the communication network 3, and the key information database 61b is collated to notify the access person of the information. Confirm whether or not you have the right and whether or not the accessor is the person who owns it.

The token transaction execution unit 64 is a power transaction token that tokenizes the right to sell or consume power as a virtual coin, and is an added value derived from the power generation method or the storage method of each power and is derived from the power transaction token. This module handles environment tokens or DR tokens. These various tokens are linked to the public account of each legitimate owner, and it is possible to prove the legitimate right holder of the token by presenting the relationship of the public accounts, and the legitimate right Only a person who is a person can execute 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 cooperation function is requested by a device of another service institution, for example, the intermediary server 2 to perform processing related to token transactions such as credit related to power transactions, security management, transaction records, and service history storage. It is a module that cooperates in processing. Further, in the present embodiment, the guarantee system cooperation function provides the broker server 2 with information such as transaction values of various tokens.

The public address management unit 64b is a private address that is generated from a public key in the public key cryptosystem and is 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 a secret key used for an electronic signature of a power transaction via a public address, and the issued public address and the key information related thereto are stored in the key information database 61b.

The legitimacy verification unit 64c is a module that verifies that various tokens related to token transactions or power transactions belong to the current owners through legitimate transactions and have not been tampered with, and are linked to public accounts. By using the attached public key of the current owner, the legitimacy of the token can be confirmed, and all the transactions related to the token are accumulated in the token transaction history database 61a, and the token transaction based on the public key. The history database 61a can be collated to confirm its validity.

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

(Operation of power transaction intermediary system)
By operating the power transaction mediation system described above, the power transaction mediation service of the present invention can be provided. FIG. 8 is a sequence diagram showing a system operation when selling power in the power transaction mediation service, and FIG. 9 is a sequence diagram showing a system operation when purchasing and consuming power in the power transaction mediation service. The processing procedure described below is merely an example, and each processing may be changed as much as possible. Further, regarding the processing procedure described below, steps can be omitted, replaced, and added as appropriate according to the embodiment.

As shown in FIG. 8, first, in the case of selling power, in the user system on the power selling side, necessary power generation amount, storage amount, and power consumption are measured according to the equipment of each user system (S101). .. Based on this measurement, power generation data, storage data, and power consumption data are generated (S102), and these data are aggregated by the smart meter 41 and reported to the mediation server 2 as actual data (S103). The performance data collected from each user system is totaled for each user system in the mediation server 2 (S201).

Next, a token issuing request is transmitted from the power selling user system to the intermediary server (S104). On the side of the intermediary server 2 that has received this token issuance request (S202), it analyzes the power generation data, storage data, and power consumption data included in the received token issuance request (S203), and is involved in various power generation methods in the market. Market information such as the purchase price and sale price of electric power is collected (S204).

Then, the power transaction token is generated, and the environmental value token and the DR token are issued as necessary (S205 and S206). Specifically, the token issuing unit 24a issues the environmental value token based on the amount of CO ₂ reduction by the power generation method or the amount of self-consumption included in the performance data. For example, in step S206, when the power generation method included in the actual result data is the reusable energy such as solar power generation or wind power generation, the token issuing unit 24a outputs the CO based on the power generation amount included in the actual result data. ₍₂ ) The value or quantity of the environmental value token is determined with reference to the reduction table data, and the environmental value token having the determined value or quantity is issued. The issued environmental value token is stored in the environmental value token pool as owned by the power generator included in the actual data.

Further, for example, in step S206, the token issuing unit 24a consumes its own power when the power generation method included in the performance data is based on reusable energy such as solar power generation or wind power generation. At times, the value or quantity of the environmental value token is determined by referring to the private consumption table data based on the amount of private consumption included in the actual data, and the environmental value token having the determined value or quantity is issued. The issued environmental value token is stored in the environmental value token pool as owned by the user who consumed it at home included in the performance data.

Further, in step S206, the token issuing unit 24a acquires the amount of donation, converts the amount of the acquired amount of the environmental value token into a tradeable renewable energy token, and converts the environment of the converted amount. Execute the renewable energy token issuance process to cancel the value token. When executing this renewable energy token issuing process, an inquiry may be made to the owner of the relevant environmental value token regarding whether or not the renewable energy token can be issued.

When permission to issue renewable energy tokens is granted, the token issuing unit 24a accepts the amount of donation and the like and the power generation method targeted for donation as search conditions, and the environment of the power generation method corresponding to this search condition is accepted. The value token is searched in the environmental value token pool in the token management database 21a. Then, the token issuing unit 24a extracts the corresponding environmental value token, distributes the input donation amount by the amount of the corresponding environmental value token, and obtains the environmental value token of the value corresponding to the distributed amount. Converted to renewable energy token, the converted renewable energy token is issued as the owner of the original environmental value token, and the issued renewable energy token is renewable energy as owned by the user who is the owner of the original environmental value token. It is accumulated in the token pool.

The various tokens issued in this way are pooled as ownership by the user who sent the token issuance request, processed so as to be accommodated in the account of the user, and recorded in the assurance system 6 (S207). Then, the mediation server 2 notifies the user system of the completion of token issuance, and the token issuance completion process is executed on the user system side (S105).

Here, in order to sell the issued token, a token sale request is transmitted from the user system to the intermediary server 2 (S106), and the intermediary server 2 that receives the token sale request (S208) sells the token. The tokens related to are pooled as trading targets.

Next, a case where electric power is purchased and consumed will be described. As shown in FIG. 9, first, in the case of power purchase, the user system on the power purchase side transmits a token purchase request to the intermediary server 2 (S401). The token purchase request includes purchase data, and the purchase data specifies power transaction tokens for a predetermined kilowatt number desired to be purchased. Upon receiving this token purchase request (S301), the mediation server 2 searches the power transaction management database 21d for a token that meets the conditions specified in the purchase request. If a token that matches the conditions is found, ownership transfer processing is executed for the token (S402).

In step S402, the token transfer unit 24c controls token transfer by rewriting the ownership of each token. The transfer of this token is performed based on the transfer request that directs the transfer. This transfer request is, for example, data that is input from the power transaction execution unit 25 when the token transaction is completed in the power transaction execution unit 25, or directly input from the power control terminal 40 by an operation by each user. It includes the type of target token, account information about the transfer source and transfer destination, and the quantity.

In particular, when the input transfer request is a request to transfer an electric power transaction token or an environmental value token, the token transfer unit 24c sends the requested electric power transaction token when the transfer request target is an electric power transaction token. When the target of the transfer request is the environmental value token that has been transferred, the environmental value token related to the request is deleted by the token canceling unit 24b, and the information regarding the transfer included in the transferred request related to the deleted environmental value token is generated as the transfer history. ..

After the token transfer process is completed, the guarantee system executes the account process related to the token transfer (S303). At this time, the transfer history of the revoked environment token is also recorded in a tamper-proof manner on the blockchain, which is a guarantee system, via the token trading platform. On the other hand, in the user system on the power purchase side, power control is also changed according to the transfer of the token (S403), the power transaction tokens owned by the user on the power purchase side increase, and the power equivalent to the owned power transaction tokens is increased. Can be supplied.

In the user system on the power purchase side, smart meter counting and reporting to the intermediary server 2 are sequentially executed (S405), and the intermediary server 2 aggregates the reports from each user system as power information (S304). Information regarding power consumption consumed by each user system is extracted from the aggregated information (S305). Then, the mediation server 2 generates power consumption data regarding the power consumed by each user system (S306).

Next, the power transaction token is canceled based on the generated power consumption data (S307). In response to the cancellation of the power transaction token, the guarantee system executes an account process related to the cancellation of the corresponding token (S308). The guarantee system 6 executes a process of erasing the value of the token such as erasing the corresponding token or setting the value of the token to 0, and records it in the node. After that, the intermediation server 2 notifies the user system of the completion of token cancellation, and the token issue completion process is executed on the user system side (S406). After this token is retired, the remaining tokens owned by the user have been reduced, and the upper limit of the power that can be used per unit period will be reduced.

(Operation during 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 power trading system according to the present embodiment, and FIG. 11 illustrates a relationship between the public key and the secret key according to the present embodiment.

In this embodiment, the mechanism of the distributed ledger system according to this embodiment is used for the token transfer processing and the account processing related to the token transfer. Here, a case where the seller Ua sells the power trading token to the new buyer Ub through the token trading platform will be described as an example. As shown in FIG. 10, this power sales transaction includes a public address and private key issuing step S501, a related service history information registration processing step S502, and a right transfer processing execution step S503.

First, in step S501, in the mediation server 2, the public address management unit 64b functions as an address issuing unit, and the public address management unit 64b corresponds to the public address PA3 unique to the token trading platform and the public address PA3 for the pool. Has issued a pair with the private key SK3. Specifically, as illustrated in FIG. 11, the mediation server 2 uses a random number generator or the like to generate a secret key SK3 associated with a public address unique to the token trading platform by a public key cryptosystem. To do. The random number generator may be incorporated in the public address management unit 64b as a program, for example. As described above, this secret key SK3 is used for the electronic signature of the transaction (here, the sale from the token transaction platform to the buyer Ub) using the paired power unique public address PA3 as the power transfer source.

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

Subsequently, the mediation server 2 applies a one-way hash function such as SHA-256 or RIPEMD-160 to the public key PK3 to generate the power unique public address PA3 from the public key PK3. For example, the mediation server 2 can generate the power unique public address PA3 by applying SHA-256 to the public key PK3 twice. That is, the power unique public address PA3 is a hash value of the public key used for signing the above-mentioned transaction, and is used to identify the transfer destination and transfer source of the token. Since the one-way hash function is used to generate the power unique public address PA3, the power unique public address PA3 can be generated 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 services provided to the power token trading platform by the seller Ua, which is the power selling source, is linked to the pool public address PA3 generated in step S501. Attach to and record to the node. Specifically, as illustrated in FIG. 10, the result data and the like acquired by the mediation server 2 are published in association with the pool public address PA3. The actual data can be freely viewed as long as the public key PK3 related to the pool public address PA3 is obtained. As a result, anyone can verify a fraudulent act such as a fraudulent or falsified history of a power generation method or a power generation location from which the power is generated or a transaction history.

After that, in step S503, the mediation server 2 performs a right transfer transaction for the power unique public address PA3 generated in step S501 according to a predetermined power transfer condition. Then, when the transfer is completed, the mediation server 2 ends the process according to the present 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 for executing the token transaction mechanism is also installed in the public address management unit 64b of the mediation server 2, and the public address for pool managed by the platform is controlled by this application.

While the power token belongs to the seller Ua, the token is associated with the seller Ua's unique public address PAa in the power control terminal 40 of the seller Ua with the secret key SKa which forms a pair, and is used in the token trading platform. When the transfer procedure is taken, the seller Ua uses the power control terminal 40 to token from the public address PAa (transfer source) to the pool public address PA3 (transfer destination) generated by the power trader in step S501. Can be temporarily relocated and pooled.

On the other hand, the buyer Ub who newly wants to purchase the electric power obtains the public key PK3 to which the electric power transaction token is linked by using his/her electric power control terminal 40, as illustrated in FIG. However, the buyer Ub can browse the power generation data on the power associated with the pool public address PA3 of the token trading platform, the transaction progress information, and the related history by power.

Specifically, an application is also installed in the power control terminal 40 of the buyer Ub, and this application manages the public address PAb held by the buyer Ub. The public address PAb is associated with its own private key SKb, which allows the token from the public address PAb of its own to be further transferred to another person. In other words, each private key SKb allows the buyer Ub to freely use the token stored in the public address PAb and its transaction history. Here, the buyer Ub uses the application in the power control terminal 40 to receive the token transferred from the power specific public address PA3 specific to the power to the public address PAb.

(Operation of guarantee 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 assurance system 6 provides a blockchain interface service, and in this service, each user system 4 or a plurality of nodes for storing at least a part or all of the data generated by the mediation server 2 are provided. These nodes aggregate the stored data at a predetermined timing to form a block, form a block chain using the block, and share the block chain among a plurality of the nodes to store it as a distributed ledger.

Specifically, as shown in FIG. 12, the power transaction system 1 according to the present embodiment uses the public key PKa and the secret key SKa based on the public key cryptosystem through the guarantee system 6 when issuing, transferring, and revoking various tokens. And a public address PAa is generated from the public key PKa corresponding to the issued token. The public address PAa is used as an address indicating the transferee (buyer Ub) and the transferor (seller Ua) in the power transaction contract, while the private key SKa is used for the electronic signature of the transaction whose public address PAa is the transfer source. Used.

The power transaction according to the present embodiment is performed between two nodes on a P2P (Peer-to-Peer) network 30 (here, between the seller Ua and the buyer Ub), and the transaction information is each node in the P2P network 30. 90a to 90f are broadcast and shared. As a result, a transaction history database (so-called block chain) by the distributed ledger system is formed on the P2P network 30, and transaction history of various tokens and power transactions is stored.

In the present embodiment, the transaction history database of this distributed ledger system executes, approves and manages power transaction contracts when rewriting the owners of various tokens through the mediation server 2. The power transaction intermediary (each power control terminal 40) generates a pool public address PA3 unique to the token transaction platform (intermediation server 2) in order to mediate the transaction between the seller Ua and the buyer Ub. , Assuming that the token to be traded is temporarily deposited in the token pool of the token trading platform, relay the transfer of the token.

Then, the parties to the transaction (the seller Ua and the buyer Ub) once receive the token by transferring the token from the current seller Ua to the pool public address PA3 unique to the token transaction platform using the power transaction system 100, Further, by transferring to the new buyer Ub via the public address PA3, the sales contract of the power token trading platform between the seller Ua and the buyer Ub is established.

As a result, the buyer Ub, who is the transferee, can receive the token at his/her public address PAb, and can browse the service history associated with this public address PA3 and use the service. The public address may be issued by the intermediary server 2, or by software on each transaction user terminal, or by a server of an independent service management institution or financial institution. Here, the detailed mechanism of this electronic cryptocurrency transaction will be specifically described with reference to FIGS. 12 to 15. FIG. 12 exemplifies the definition of a transaction (transaction) related to token issue/transfer/revocation, and FIGS. 13 to 15 exemplify a part of the token transaction history (block chain).

A transaction history relating to issuance, transfer, and cancellation of each token is defined as a series of digital signatures illustrated in FIG. When transferring the transaction history to the next owner, the owner of each token electronically signs the hash value of the last transaction and the hash value of the public key of the next owner with its own private key. What you did is added to the token transaction history. Note that a one-way hash function such as SHA-256 or RIPEMD-160 is used for calculating these hash values.

In FIG. 12, 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. It is illustrated. In this case, when transferring a token from owner A to owner B, owner A uses the hash value of the transfer transaction from owner Z to owner A and the public key of the next owner, owner B. The hash value and the digital signature of the owner A's private key are added to the token.

The owner of the token after this transaction including the owner B, the value obtained by decrypting this electronic signature with the public key of the owner A from the owner Z to the owner A is the hash value of the transaction and the disclosure of the owner B. By comparing 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 will include the hash value of the transfer transaction from Owner A to Owner B and the public key of Owner C, the next owner. The hash value and the digital signature of the private key of the owner B are added to the token. This makes it possible to determine whether the transfer transaction from the owner B to the 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 stored in this public address can be transferred only to the person who can electronically sign the power transaction whose transfer address is this public address, that is, the person who has the private key corresponding to this public address. .. Therefore, the private key is generally kept secret so as not to be leaked to anyone other than the owner. Data such as tokens and transaction history related to the tokens are stored in 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 multiply using (multiple transferring) the token only with this electronic signature, the token transaction according to the present embodiment can be performed. In the mechanism, this multiple use is prevented by using a mechanism called a block chain illustrated in FIGS. 13 and 14.

As illustrated in FIGS. 13 and 14, each block recorded in the token or the like stores a plurality of transactions, Nonce, and a hash value of the immediately preceding block. Nonce is a disposable random value used in cryptographic communication, and among the nodes (minor) 60a to 60f, the node (minor) that first discovers this value is the blockchain for the block in which Nonce is discovered as the approver. Update the blockchain by adding to the end of. As a result, a consistent transaction history is recorded in the block chain, and by sharing this block chain with all the nodes 90a to 90f participating in the P2P network 30, a consistent transaction history is recorded in the entire P2P network 30. Can be shared. That is, this block chain will be responsible for part or all of the token transaction history database 61a and the key information database 61b in the guarantee system 6 described above. In this embodiment, in the 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, it is possible to issue various tokens based on the power generation time, place, and power generation method of electricity, and use the tokens to perform trading of electricity and settlement of consideration. As a result, in diversifying electric power transactions such as environmental value transactions and adjustment power transactions, added value can be accumulated and distributed as tokens in each transaction unit. For example, by using a token, it is possible to freely link the supply destination and the demand destination in transaction units such as self-consumption, interchange of others, market trading, PPS provision, etc., compared with the market value. Further, by providing an API and a terminal for interfacing with the platform, it is possible to easily enter the platform. Furthermore, since the blockchain interface service is also implemented, it is possible to easily enter from an existing interface. As a result, according to the present invention, in the electric power trading market in which diversified electric power values are mixed, it is possible to perform charging and selling by linking the supply source and the demand destination while appropriately evaluating the value of electric power. ..

In particular, since a distributed database system is adopted as the assurance system, it is not necessary to provide a strong single system management and operation facility for each business operator, and information is linked when exchanging information between vendors. Because the database is standardized, privacy protection, and advanced security measures against data tampering are ensured by the distributed database mechanism, the equipment cost and operation cost can be suppressed.

D1... Execution data D21... Sale data D22... Purchase data D3... Actual data PAa... Public address PAb... Public address PKa... Public key SKa... Private key SKb... Private key Ua... Seller Ub... Buyer 1... Power trading system 2... Mediation server 3... Communication network 4... User system 6... Assurance system 11... CPU
20...User system 21a...Token management database 21b...User database 21c...Result management database 21d...Power transaction management database 22...Authentication unit 23...Communication interface 24...Token management unit 24a...Token issuing unit 24b...Token canceling unit 24c...Token Transfer unit 25... Electric power transaction execution unit 25a... Contract data generation unit 25b... Guarantee system cooperation unit 26... Actual data management unit 26a... Value evaluation unit 26b... Failure determination unit 27... Settlement unit 30... P2P network 40... Power control terminal 41 Smart meter 42 Storage battery 61a Token transaction history database 61b Key information database 61c Account database 62 Authentication unit 63 Communication interface 64 Token transaction execution unit 64a Transaction history providing unit 64b Public address management unit 64c Legitimate Sex verification unit 64d... data updating unit 90a to 90f... node 100... power trading system 400... CPU bus 401... storage device 402... CPU
402a... Power trading unit 403... Memory 404... Input interface 405... Output interface 406... Communication interface

Claims (6)

A power trading system in which a plurality of user systems that control and manage power for each power consumption unit and a mediation server that mediates the sale and purchase of power are connected by a communication network,
The user system includes a performance data generation unit that measures the amount of power generated or consumed by each user during each power usage period and generates performance data.
The mediation server is
A token issuing unit that issues an environmental value token that is an evaluation of the degree of contribution to the power transaction token including the power usage period, the amount of power, and the amount of consideration, based on the result data;
A token canceling unit that cancels the power transaction token based on the performance data,
The actual result data generation unit further includes, in the actual result data, a type of power generation or storage relating to consumed power, in the actual result data,
The token issuing unit increases the value of the environmental value token when the electric power generated by a power generation type having a high contribution to the environment is stored in a power storage type having a high contribution to the environment based on the result data. And the electricity trading system. Further comprising a cooperation unit for recording data relating to issuance and cancellation of the power transaction token, in cooperation with a guarantee system which stores at least a part of data relating to issuance and cancellation of the power transaction token and environmental value token,
The assurance system includes a plurality of nodes for storing at least a part of data generated by the user system and the mediation server,
The node aggregates the stored data at a predetermined timing to form a block, forms a block chain using the block, and shares the block chain with a plurality of the nodes to store as a distributed ledger. The power trading system according to claim 1. In response to a token transfer request that requests transfer of the power transaction token or the environmental value token, when the target of the transfer request is a power transaction token, the power transaction token related to the request is transferred, and the target of the transfer request The electric power trading system according to claim 1, further comprising a token transfer unit that cancels the environmental value token related to the request when is the environmental value token. The token transfer unit further has a function of generating, as a transfer history, information about transfer included in a transfer request related to the canceled environmental value token,
The power trading system according to claim 2, wherein the cooperation unit further has a function of recording the transfer history in cooperation with the guarantee system. The performance data generation unit further includes, in the performance data, power storage data regarding a power storage amount and a power storage period thereof,
The power transaction system according to claim 1, wherein the token issuing unit issues a power demand control token as a consideration for generating surplus power, based on the actual data including the electricity storage data. The guarantee system is
A public address generated from a public key in the public key cryptosystem for identifying a specific user, and a private key that can be paired with the public key to specify the public key and that has power via the public address. An address issuing unit for issuing a private key used for the electronic signature of the transaction is further provided,
In response to a token transfer request that requests transfer of the power transaction token or the environmental value token, when the target of the transfer request is a power transaction token, the power transaction token related to the request is transferred, and the target of the transfer request If is the environmental value token, cancel the environmental value token related to the request,
The data including the public key of the user of the transfer destination of the power transaction token related to the transfer or the environmental value token related to the cancellation is aggregated into blocks at a predetermined timing, and a block chain is formed using the blocks, and the blocks The power trading system according to claim 2, wherein a chain is shared by a plurality of the nodes and is stored in the nodes as a distributed ledger.