WO2021106385A1

WO2021106385A1 - Power transaction system and power transaction method

Info

Publication number: WO2021106385A1
Application number: PCT/JP2020/038263
Authority: WO
Inventors: 良佑仲野; 石井　圭; 聡舟橋; 麗夏牛嶋; 安西　史圭; 由起彦井上
Original assignee: 三菱重工業株式会社
Priority date: 2019-11-27
Filing date: 2020-10-09
Publication date: 2021-06-03

Abstract

This power transaction system is provided with a first block chain possessed by a supplier, a second block chain possessed by an aggregator, and a third block chain possessed by a customer, wherein the second block chain is connectable with each of the first block chain and the third block chain.

Description

Electric power trading system and electric power trading method

The present disclosure relates to a power trading system and a power trading method.
The present application claims priority based on Japanese Patent Application No. 2019-214446 filed in Japan on November 27, 2019 and Japanese Patent Application No. 2019-214247 filed in Japan on November 27, 2019. The contents are used here.

In the electric power trading system, a method using a blockchain is being studied as a highly secure distributed system. For example, it is considered to apply a blockchain to demand response, which is a function of electric power trading.

Demand response is a mechanism that changes the demand amount of consumers (companies, households, etc.) according to the supply amount of suppliers (power generation companies, etc.). For example, each of multiple consumers has a contract with an aggregator to save electricity under certain conditions in advance, and when the supplier requests a reduction in power demand through the aggregator, the power of the electrical equipment is turned off. To save electricity. The aggregator collects the amount of power saved by the consumer and trades with the supplier, and pays the consumer an incentive according to the amount of power saved.

Patent Document 1 describes a system that records and stores the power consumption amount, power saving amount, power saving consideration (power saving point), etc. of each of a plurality of electric devices, which are data related to such demand response, as block data. There is.

JP-A-2018-166284

In the conventional system, since the aggregator bundles multiple consumers and acts as an intermediary with the supplier, the supplier and the consumer will participate in the blockchain provided by the aggregator. In this case, since the aggregator needs to centrally manage the blockchain, the reliability of the system depends on the aggregator. Further, since only one blockchain provided by the aggregator manages a plurality of different data such as power generation receipt data, power billing data, and incentive data related to electric power transactions together, the blockchain management becomes complicated. Doing so can reduce the reliability of the system.

In addition, suppliers and consumers need to pay for modifying or developing their own system according to the data format of the blockchain of the aggregator.

Also, in the conventional system, information on the supply source such as the power generation method, supply area, and power generation scale is not provided to the consumer. Therefore, even if the consumer wants to use only a specific category of electric power (for example, electric power derived from natural energy), it is difficult for the consumer to select the desired electric power category and purchase the electric power.

This disclosure is made in view of such a problem, and provides an electric power trading system and an electric power trading method capable of performing highly reliable electric power trading by linking a plurality of blockchains.

It also provides an electric power trading system and an electric power trading method that can be purchased by selecting an electric power category.

According to one aspect of the present disclosure, the electric power trading system includes a first blockchain owned by a supplier, a second blockchain owned by an aggregator, and a third blockchain owned by a consumer, and the second blockchain. Can be connected to each of the first blockchain and the third blockchain.

According to one aspect of the present disclosure, the electric power trading method is an electric power trading method using a first blockchain owned by a supplier, a second blockchain owned by an aggregator, and a third blockchain owned by a consumer. Through the aggregator, based on the step of generating the supplier electric power information regarding the electric power that can be supplied by the supplier and registering the electric power in the first blockchain and the supplier electric power information acquired from the first blockchain. At least one of the plurality of aggregators based on the step of generating the aggregator electric power information regarding the electric power that can be transmitted and registering the aggregator electric power information in the second blockchain and the aggregator electric power information acquired from the second blockchain. To supply power between the supplier, the selected aggregator, and the consumer in each of the first blockchain, the second blockchain, and the third blockchain. It has a step of executing such contract processing.

According to one aspect of the present disclosure, a plurality of electric power trading methods are provided corresponding to each of a step of registering information related to a supplier's electric power transaction in the first blockchain and a category of electric power supplied by the supplier. In each of the second blockchains, the step of registering the information related to the electric power transaction of the aggregator according to the category and the third blockchain correspond to the category preset by the consumer among the plurality of the second blockchains. It has a step of connecting to the second blockchain to register the information related to the electric power transaction of the consumer.

According to the electric power trading system and the electric power trading method according to the present disclosure, the reliability of electric power trading can be improved by linking a plurality of blockchains.

According to the electric power trading system and the electric power trading method according to the present disclosure, it is possible to select an electric power category and purchase electric power.

It is the schematic of the electric power trading system which concerns on 1st Embodiment of this disclosure. It is a figure which shows the functional structure of the supplier system and 1st blockchain which concerns on 1st Embodiment of this disclosure. It is a figure which shows the functional structure of the aggregator system and the 2nd blockchain which concerns on 1st Embodiment of this disclosure. It is a figure which shows the functional structure of the consumer system and the 3rd blockchain which concerns on 1st Embodiment of this disclosure. It is a flowchart which shows an example of the processing of the electric power trading system which concerns on 1st Embodiment of this disclosure. It is the schematic of the electric power trading system which concerns on the 2nd Embodiment of this disclosure. It is a figure for demonstrating the electric power trading system which concerns on the 2nd Embodiment of this disclosure. It is a flowchart which shows an example of the processing of the electric power trading system which concerns on the 2nd Embodiment of this disclosure. It is a flowchart which shows an example of the processing of the electric power trading system which concerns on 3rd Embodiment of this disclosure. It is the schematic of the electric power trading system which concerns on 4th Embodiment of this disclosure. It is a figure which shows the functional structure of the supplier system and 1st blockchain which concerns on 4th Embodiment of this disclosure. It is a figure which shows the functional structure of the aggregator system and the 2nd blockchain which concerns on 4th Embodiment of this disclosure. It is a figure which shows the functional structure of the consumer system and the 3rd blockchain which concerns on 4th Embodiment of this disclosure. It is a flowchart which shows an example of the processing of the electric power trading system which concerns on 4th Embodiment of this disclosure. It is the schematic of the electric power trading system which concerns on 5th Embodiment of this disclosure. It is a figure which shows the functional structure of the storage battery system and the 4th blockchain which concerns on 5th Embodiment of this disclosure. It is a 1st flowchart which shows an example of the processing of the electric power trading system which concerns on 5th Embodiment of this disclosure. 2 is a second flowchart showing an example of processing of the electric power trading system according to the fifth embodiment of the present disclosure. It is the schematic of the electric power trading system which concerns on 6th Embodiment of this disclosure. It is a flowchart which shows an example of the processing of the electric power trading system which concerns on 6th Embodiment of this disclosure. It is a figure which shows an example of the hardware composition of the supplier system, the aggregator system, the consumer system, and a node which concerns on at least one Embodiment of this disclosure.

<First Embodiment>
Hereinafter, the electric power trading system 1 according to the first embodiment of the present disclosure will be described with reference to the drawings.

(overall structure)
FIG. 1 is a schematic view of an electric power trading system according to the first embodiment of the present disclosure.
In the electric power trading system 1 according to the present embodiment, the supplier and the consumer perform electric power trading via an aggregator. Consumers are businesses, ordinary households, etc. The suppliers are power generation companies, power transmission and distribution companies, and the like. An aggregator is a business operator that adjusts the supply-demand balance between the electric power required by a consumer and the electric power supplied by the supplier. The consumer according to the present embodiment selects one aggregator that satisfies the customer's desired conditions from the plurality of aggregators, and concludes a power transaction contract through the aggregator.

As shown in FIG. 1, the electric power trading system 1 includes a supplier system 10, an aggregator system 20, a consumer system 30, a first blockchain BC1, a second blockchain BC2, and a third blockchain BC3. ..

The supplier system 10 is a system that performs various processes on the supplier side related to electric power transactions. The first blockchain BC1 is a distributed network composed of a plurality of first nodes 11. The first blockchain BC1 is connected to the supplier system 10 and records and accumulates various data on the supplier side related to electric power transactions.
Note that FIG. 1 shows an example in which only one supplier exists for the sake of simplification of the explanation, but the present invention is not limited to this. In other embodiments, there may be multiple suppliers. In this case, each supplier has a supplier system 10 and a first blockchain BC1, respectively.

The aggregator system 20 is a system that performs various processes on the aggregator side related to electric power trading.
The second blockchain BC2 is a decentralized network composed of a plurality of second nodes 21. The second blockchain BC2 is connected to the aggregator system 20 and records and accumulates various data on the aggregator side related to electric power transactions.
As illustrated in FIG. 1, in this embodiment, there are a plurality of aggregators, each of which has

aggregator systems

20a and 20b. Further, the

aggregator systems

20a and 20b are connected to the second blockchain BC2a and BC2b, respectively. In another embodiment, there may be three or more aggregators, each of which has an aggregator system and a second blockchain BC2.

The consumer system 30 is a system that performs various processes on the consumer side related to electric power transactions.
The third blockchain BC3 is a decentralized network composed of a plurality of third nodes 31. The third blockchain BC3 is connected to the consumer system 30 and records and accumulates various data on the consumer side related to electric power transactions.
Note that FIG. 1 shows an example in which only one consumer exists for the sake of simplification of the explanation, but the present invention is not limited to this. In other embodiments, there may be multiple consumers. In this case, each consumer has a consumer system 30 and a third blockchain BC3, respectively.

The format of the data registered in each of the first blockchain BC1, the second blockchain BC2, and the third blockchain BC3 is independently set by each of the supplier, aggregator, and consumer who manages these blockchains. In addition, this format may be changed according to the individual circumstances of the supplier, the aggregator, and the consumer.

Further, the first blockchain BC1 and the second blockchain BC2 are connected so as to be able to communicate using interleisure. The same applies to the second blockchain BC2 and the third blockchain BC3. Interledger is a mechanism for exchanging values and conducting transactions between ledgers (data) with different standards. For example, each blockchain according to the present embodiment has nodes that serve as connectors to other blockchains, and necessary data is exchanged between these nodes. It should be noted that any one of the plurality of first nodes 11, any one of the plurality of second nodes 21, and any one of the plurality of third nodes are included in the respective blockchains. It may function as a connector.

(Functional configuration of supplier system and first blockchain)
FIG. 2 is a diagram showing a functional configuration of a supplier system and a first blockchain according to the first embodiment of the present disclosure.
As shown in FIG. 2, the supplier system 10 includes a first processing unit 100 and a notification unit 101. Further, the first node 11 constituting the first blockchain BC1 includes a transaction generation unit 110, a block generation unit 111, a data registration unit 112, a contract processing unit 113, and a storage medium 114.

The first processing unit 100 of the supplier system 10 generates the supplier electric power information regarding the electric power that can be supplied by the supplier and registers it in the first blockchain BC1. The supplier power information includes, for example, the power that can be supplied indicating the power that can be supplied in a certain period, the selling price per unit power in the period (hereinafter referred to as "wholesale price"), the start time of the period, and the start time of the period. Information such as end time (supplyable time) is included. Further, the supplier power information may include supplier identification information (supplier name, etc.).

The notification unit 101 of the supplier system 10 notifies each of the plurality of aggregators of the supplier power information generated by the first processing unit 100. Specifically, the notification unit 101 instructs the first blockchain BC1 to transmit the supplier power information registered in the first blockchain BC1 to the second blockchain BC2 of the aggregator via the interledger. I do.

The transaction generation unit 110 of the first node 11 generates a transaction related to the electric power transaction in the first blockchain BC1. The transaction generation unit 110 registers the generated transaction in the transaction pool of the first blockchain BC1 by transmitting the generated transaction to another first node 11. This transaction also includes supplier power information generated by the supplier system 10. The transaction generation unit 110 may include a smart contract in the generated transaction. Smart contracts are used, for example, in contracts for purchasing electricity by consumers.

Further, when the transaction generation unit 110 is instructed to notify the supplier power information from the supplier system 10, the transaction generation unit 110 transmits a transaction including the supplier power information to the second blockchain BC2 via the interledger. As a result, the transaction including the supplier power information is registered in the transaction pool of the second blockchain BC2.

The block generation unit 111 of the first node 11 generates block data including a predetermined number of transactions registered in the transaction pool. For example, in each first node 11, the block generation unit 111 calculates the nonce value to be included in the block data so that the block data including the plurality of transactions has a predetermined hash value. In this case, the first node 11 that has completed the calculation earliest generates the block data (Proof of Work). In another embodiment, the block generation unit 111 may generate block data by using the Proof of Stake method or the like.

The data registration unit 112 of the first node 11 registers the block data in the first blockchain BC1 by transmitting the block data generated by the block generation unit 111 to the other first node 11. Further, the data registration unit 112 verifies the block data received from the other first node 11 and stores it in the storage medium 114. At this time, the data registration unit 112 verifies the block by, for example, calculating the hash value of the block data received from the other first node 11 and determining whether or not the hash value satisfies a predetermined condition. To do.

The contract processing unit 113 of the first node 11 executes the processing related to the electric power transaction between the supplier, the consumer, and the aggregator by executing the smart contract included in the transaction. Depending on the content of the smart contract, a new transaction may be generated by the transaction generation unit 110.

The storage medium 114 of the first node 11 stores the data acquired and generated by each part. For example, the storage medium 114 stores transactions generated by the transaction generation unit 110, block data generated by the block generation unit 111, and the like.

(Functional configuration of aggregator system and 2nd blockchain)
FIG. 3 is a diagram showing a functional configuration of an aggregator system and a second blockchain according to the first embodiment of the present disclosure.
As shown in FIG. 3, the aggregator system 20 includes a second processing unit 200 and a notification unit 201. Further, the second node 21 constituting the second blockchain BC2 includes a transaction generation unit 210, a block generation unit 211, a data registration unit 212, a contract processing unit 213, and a storage medium 214.

The second processing unit 200 of the aggregator system 20 generates aggregator power information regarding the power that can be transmitted via the aggregator based on the supplier power information acquired from the first blockchain BC1, and registers the aggregator power information in the second blockchain BC2. To do. The aggregator power information includes, for example, the power that can be transmitted by the aggregator in a certain period, the selling price per unit power (hereinafter referred to as "retail price"), the start time and the end time (transmission time) of the period, and the like. Information is included. Further, the aggregator power information may include aggregator identification information (aggregator name, etc.).

Further, when the second processing unit 200 receives an inquiry from a consumer about the period when he / she wants to purchase the electric charge, the desired amount of electric charge purchased in the period, and the like, the second processing unit 200 generates information indicating whether or not the electric charge can be sold to the consumer, and the second blockchain. Register with BC2.

The notification unit 201 of the aggregator system 20 notifies the consumer of the aggregator power information generated by the second processing unit 200 and the information indicating whether or not the power can be sold. Specifically, the notification unit 201 transmits the aggregator power information registered in the second blockchain BC2 and the information indicating whether or not the power can be sold to the third blockchain BC3 of the consumer via the interledger. Instruct the second blockchain BC2.

The transaction generation unit 210 of the second node 21 generates a transaction related to the electric power transaction in the second blockchain BC2. The transaction generation unit 210 registers the generated transaction in the transaction pool of the second blockchain BC2 by transmitting the generated transaction to another second node 21. This transaction also includes aggregator power information generated by the aggregator system 20. The transaction generation unit 210 may include a smart contract in the generated transaction. Smart contracts are used, for example, in contracts for purchasing electricity by consumers.

Further, when the transaction generation unit 210 is instructed by the aggregator system 20 to notify the aggregator power information and the information indicating whether or not the power can be sold, the transaction generation unit 210 transmits the transaction including the information to the third blockchain BC3 via the interledger. Send. As a result, the transaction including the aggregator power information is registered in the transaction pool of the third blockchain BC3.

The block generation unit 211 of the second node 21 generates block data including a predetermined number of transactions registered in the transaction pool. The processing of the block generation unit 211 is the same as the processing of the block generation unit 111 of the first node 11 described above.

The data registration unit 212 of the second node 21 registers the block data in the second blockchain BC2 by transmitting the block data generated by the block generation unit 211 to another second node 21. Further, the data registration unit 212 verifies the block data received from the other second node 21 and stores it in the storage medium 214. The processing of the data registration unit 212 is the same as the processing in the data registration unit 112 of the first node 11 described above.

The contract processing unit 213 of the second node 21 executes the processing related to the electric power transaction between the supplier, the consumer, and the aggregator by executing the smart contract included in the transaction. Depending on the content of the smart contract, a new transaction may be generated by the transaction generation unit 210.

The storage medium 214 of the second node 21 stores the data acquired and generated by each unit. For example, the storage medium 214 stores transactions generated by the transaction generation unit 210, block data generated by the block generation unit 211, and the like.

(Functional configuration of consumer system and 3rd blockchain)
FIG. 4 is a diagram showing a functional configuration of a consumer system and a third blockchain according to the first embodiment of the present disclosure.
As shown in FIG. 4, the consumer system 30 includes an acquisition unit 300 and a selection unit 301. Further, the third node 31 constituting the third blockchain BC3 includes a transaction generation unit 310, a block generation unit 311, a data registration unit 312, a contract processing unit 313, and a storage medium 314.

The acquisition unit 300 of the consumer system 30 acquires aggregator power information from each of the plurality of aggregators. For example, the acquisition unit 300 sets the desired purchase period (start time and end time) in which the consumer wants to purchase electric power, the desired purchase amount in the desired purchase period, the position information of the consumer (transmission destination), and the like, and sets the aggregator system. Make an inquiry to 20. The acquisition unit 300 acquires the information indicating whether or not the power can be sold and the aggregator power information, which are the responses from the aggregator system 20, through the second blockchain BC2 and the third blockchain BC3.

The selection unit 301 of the consumer system 30 selects at least one aggregator from a plurality of aggregators based on the aggregator power information acquired from the second blockchain BC2. The selection unit 301 according to the present embodiment selects one aggregator that satisfies the conditions (desired power purchase amount and desired power purchase price) preset by the consumer.

In addition, the selection unit 301 instructs the third blockchain BC3 to place an order for power purchase from the selected aggregator.

The transaction generation unit 310 of the third node 31 generates a transaction related to the electric power transaction in the second blockchain BC2. The transaction generation unit 310 registers the generated transaction in the transaction pool of the third blockchain BC3 by transmitting the generated transaction to another third node 31. In the present embodiment, when the transaction generation unit 310 receives an instruction to order an electric power purchase from the consumer system 30, it generates a transaction including a smart contract related to the purchase contract.

The block generation unit 311 of the third node 31 generates block data including a predetermined number of transactions registered in the transaction pool. The processing of the block generation unit 311 is the same as the processing of the block generation unit 111 of the first node 11 described above.

The data registration unit 312 of the third node 31 registers the block data in the third blockchain BC3 by transmitting the block data generated by the block generation unit 311 to another third node 31. Further, the data registration unit 312 verifies the block data received from the other third node 31 and stores it in the storage medium 314. The processing of the data registration unit 312 is the same as the processing in the data registration unit 112 of the first node 11 described above.

The contract processing unit 313 of the third node 31 executes the processing related to the electric power transaction between the supplier, the consumer, and the aggregator by executing the smart contract included in the transaction. Depending on the content of the smart contract, a new transaction may be generated by the transaction generation unit 310.

The storage medium 314 of the third node 31 stores the data acquired and generated by each unit. For example, the storage medium 314 stores transactions generated by the transaction generation unit 310, block data generated by the block generation unit 311 and the like.

(Processing flow of electric power trading system)
FIG. 5 is a flowchart showing an example of processing of the electric power trading system according to the first embodiment of the present disclosure.
Hereinafter, the processing flow in the electric power trading system 1 according to the present embodiment will be described with reference to FIG.

The first processing unit 100 of the supplier system 10 generates the supplier power information and registers it in the first blockchain BC1. Further, the notification unit 101 of the supplier system 10 notifies each of the plurality of aggregators of the supplier power information through the first blockchain BC1 and the second blockchain BC2 (step S100). Then, the supplier power information notified from the supplier system 10 is registered in the second blockchains BC2a and BC2b connected to the

aggregator systems

20a and 20b (step S101).

The acquisition unit 300 of the consumer system 30 makes inquiries to each of the plurality of aggregators regarding the electric power that the consumer wants to purchase (step S102). The inquiry includes, for example, a desired purchase period for which the consumer wants to purchase electric power, a desired amount of electric charge, the location information of the consumer, and the like.

When the second processing unit 200 of the

aggregator systems

20a and 20b receives an inquiry from a consumer, it generates aggregator power information and determines whether or not to sell the power to the consumer (step S103). Specifically, the second processing unit 200 acquires the supplier power information corresponding to the desired purchase period of the consumer from the second blockchain BC2. The second processing unit 200 sets the transmittable power and the retail price based on the acquired supplier power information, and generates the aggregator power information.

Specifically, the second processing unit 200 sets the power that can be supplied to the consumer (the power for which the power sale contract has not been established) as the power that can be transmitted, up to the power that can be supplied included in the power information of the supplier. Set. In addition, the second processing unit 200 sets the transmittable power so as not to exceed the maximum transmission capacity of the transmission network used by the aggregator. Further, when a predetermined power among the powers that can be supplied by the supplier is assigned to the aggregator, the second processing unit 200 may set the power that can be transmitted within the range of the assigned powers.

In addition, the second processing unit 200 identifies the power transmission route from the position information of the consumer, adds the power transmission cost according to the distance of the power transmission route, etc. to the wholesale price included in the supplier power information, and adds the retail price. Set. The second processing unit 200 may set the retail price by further adding the power trading margin of the aggregator.

The second processing unit 200 may set the retail price in consideration of the planned power transmission amount or the usage rate of the power transmission path. The planned transmission amount or usage rate of the transmission path may be calculated from the electric power for which the sales contract has already been completed, or may be calculated based on the demand forecast. For example, the second processing unit 200 may raise the retail price as the usage rate of the power transmission path approaches the upper limit value (maximum power transmission capacity). As a result, when electricity demand is expected to be high (close to the limit), the electricity transaction volume can be adjusted by raising the retail price and suppressing further demand. Further, the second processing unit 200 may set the retail price according to the time until the start of power supply to the consumer (the start time of the desired purchase period of the consumer). For example, the second processing unit 200 sets the retail price lower as the time until the start of power supply becomes longer. As a result, it is possible to encourage consumers to purchase electricity at an early stage, and it becomes easy to grasp the future electricity transaction volume from an early stage.

Further, when the aggregator has a plurality of power transmission paths (for example, when electric power can be traded with each of the plurality of suppliers), the second processing unit 200 may set the retail price for each power transmission path. Good. In this case, a plurality of aggregator power information may be generated for each transmission path. For example, when the usage rate in one transmission path is close to the upper limit value, the second processing unit 200 sets the transmission cost of another transmission path having a lower usage rate lower than the transmission cost of the one transmission path. May be good. As a result, the aggregator can guide the consumer to a vacant power transmission path (supplier).

Further, when the desired power purchase amount of the consumer is less than or equal to the power that can be transmitted, the second processing unit 200 determines that the power can be sold to the consumer. The second processing unit 200 determines that it is impossible to sell power to the consumer when the desired power purchase amount exceeds the power that can be transmitted. The second processing unit 200 may determine that it is impossible to sell power to the consumer when the power transmission capacity in the power transmission path to the consumer exceeds a predetermined value. This makes it possible to adjust the amount of electricity traded in the aggregator.

Next, the notification unit 201 of the

aggregator systems

20a and 20b notifies the consumer of the aggregator power information and the information indicating whether or not the power can be sold through the second blockchain BC2a, BC2b and the third blockchain BC3 (step S104). .. Then, the acquisition unit 300 of the consumer system 30 can acquire the aggregator power information notified from the

aggregator systems

20a and 20b and the information indicating whether or not the power can be sold from the third blockchain BC3.

The selection unit 301 of the consumer system 30 selects one aggregator that satisfies the conditions preset by the consumer based on the aggregator power information and the information indicating whether or not the power can be sold (step S105).

Specifically, the selection unit 301 is an aggregator capable of transmitting more than the desired power purchase amount preset by the consumer (notifying information indicating that the power can be sold), and the wholesale price is the consumer. Select an aggregator that is lower than the desired electricity purchase price. When a plurality of aggregators satisfy these conditions, the selection unit 301 selects the aggregator having the lowest wholesale price. In the example of FIG. 5, it is assumed that the selection unit 301 selects the aggregator 1.

The selection unit 301 may select an aggregator that responds to an inquiry from a consumer as soon as possible and satisfies the conditions set by the consumer.

Next, the selection unit 301 of the consumer system 30 instructs the third blockchain BC3 to place an order for power purchase with the selected aggregator 1. Upon receiving the instruction from the consumer system 30, the transaction generation unit 310 of the third blockchain BC3 generates a transaction including a smart contract related to the power purchase contract with the selected aggregator, and the second of the selected aggregator. An order is placed to the aggregator 1 by transmitting to the blockchain BC2 (in the example of FIG. 5, the second blockchain BC2a) (step S106).

Further, in the second blockchain BC2a of the aggregator 1, the contract processing unit 213 executes the smart contract included in the transaction received from the third blockchain BC3, and determines whether it is possible to receive an order (power sale) from the consumer (power sale). Step S107). When the contract processing unit 213 cannot accept the order (step S107: NO), the contract processing unit 213 notifies the third blockchain BC3 of the consumer of the failure (step S108). For example, the contract processing unit 213 determines that the order cannot be received if the usage rate of the transmission path of the aggregator reaches the upper limit value before the order is placed from the consumer. On the other hand, when the contract processing unit 213 can receive an order as desired by the consumer (step S107: YES), the contract processing unit 213 places an order with the supplier through the second blockchain BC2a for the electric power that the consumer wants to purchase (step S107: YES). S109).

Further, when an order is placed from the aggregator 1 to the supplier, the transaction including this smart contract is transmitted to the first blockchain BC1 of the supplier, and the smart contract is further executed in the contract processing unit 113. Specifically, the contract processing unit 113 determines whether the power can be sold to the consumer, and if the power can be sold (step S110: YES), the contract processing unit 113 executes the contract to the second blockchain BC2a of the aggregator 1. (Step S112), and if power sales are not possible (step S110: NO), the second blockchain BC2a of the aggregator 1 is notified of the failure (step S111). For example, the contract processing unit 113 determines that the electric power cannot be sold when the electric power that can be supplied changes before the order is placed by the consumer and the desired electric power purchase amount of the consumer cannot be supplied.

Further, the third blockchain BC3 of the consumer receives a notification of failure (step S113) or a notification of execution (step S114) through the second blockchain BC2a.

The processing from steps S106 to S111 is predetermined by the smart contract included in the transaction. Therefore, it is automatically processed by the first blockchain BC1, the second blockchain BC2, and the third blockchain BC3 without each of the supplier, the aggregator, and the consumer performing processing such as confirmation and approval.

Further, when the consumer receives the result of failure (step S113), he / she may return to step S105 and select an aggregator (for example, an aggregator 2) different from the previously selected aggregator 1 to place an order. ..

(Action effect)
As described above, the electric power trading system 1 according to the present embodiment uses the interleisure to connect the first blockchain BC1 of the supplier, the second blockchain BC2 of the aggregator, and the third blockchain of the consumer to each of them. It is possible to transfer various data related to registered electric power transactions. As a result, the electric power trading system 1 connects and links the blockchains of each electric power trading participant (supplier, aggregator, consumer) without centralized management by a specific aggregator, and is reliable. Can carry out high power trading.

In addition, since each participant only needs to have an interface with the existing system for the blockchain, the cost when the participant participates in the electric power trading system 1 can be reduced. In addition, since each blockchain is under the control of each participant, it is easy to modify it according to the circumstances of each participant.

Further, since the electric power trading system 1 can automatically make a contract for electric power trading by using a smart contract, it is possible to conclude a contract in a short time. As a result, the electric power trading system 1 can follow the fluctuating supply and demand situation in real time.

Further, in the electric power trading system 1, the aggregator system 20 sets a retail price obtained by adding the transmission cost of the aggregator to the wholesale price.
For example, even if the wholesale price of a certain supplier 1 is low, the distance of the transmission path from the supplier 1 to the consumer may be long, and the transmission cost may be high. Then, although the wholesale price is set higher than this supplier 1, it is possible that the total amount will be cheaper if the power is sold from the supplier 2 which is in the vicinity of the consumer and whose transmission cost is lower than that of the supplier 1. is there. In the electric power trading system 1 according to the present embodiment, since the retail price presented to the consumer by the aggregator includes the transmission cost, the consumer can select a cheaper aggregator.

Further, the aggregator system 20 may set a retail price in which the power trading margin of the aggregator is further added. Transmission costs and power trading margins can vary from aggregator to aggregator. Further, even if the same aggregator is used, the power transmission cost and the power trading margin may change depending on the excessive demand on the date and time of power transmission. Therefore, the consumer can select an aggregator that offers a cheaper retail price during the period in which he / she desires to purchase electricity.

<Second embodiment>
Next, the electric power trading system 1 according to the second embodiment of the present disclosure will be described.
The components common to the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

(overall structure)
FIG. 6 is a schematic view of the electric power trading system according to the second embodiment of the present disclosure.
As shown in FIG. 6, in the electric power trading system 1 according to the present embodiment, the second blockchain BC2 of a plurality of aggregators may be connected in series.
In the example of FIG. 6, three aggregators 1 to 3 participate in the electric power trading system 1. Of these three aggregators, the second blockchain BC2a of the aggregator 1 and the second blockchain BC2b of the aggregator 2 are communicably connected via interledgers.

FIG. 7 is a diagram for explaining the electric power trading system according to the second embodiment of the present disclosure.
In FIG. 7, the aggregators 1 to 3 have different service ranges R1 to R3. Aggregators 1 to 3 can transmit power to consumers located within the service range by means of transmission lines connecting the substations T1 to T9 and the substations. In the example of FIG. 7, since both the supplier and the consumer are included in the service range R3 of the aggregator 3, the consumer can receive power from the supplier via the aggregator 3. On the other hand, the service range R1 of the aggregator 1 does not include the consumer, and the service range R2 of the aggregator 2 does not include the supplier. Therefore, the consumer cannot receive power from this supplier only through the aggregator 1 or the aggregator 2.

However, in the electric power trading system 1 according to the present embodiment, the power transmission path (supply) of the aggregator 1 is passed through the substation T5 located in the area where the service range R1 of the aggregator 1 and the service range R2 of the aggregator 2 overlap. It is possible to transmit power across the person-substation T1 to substation T5) and the power transmission path of the aggregator 2 (substation T5 to substation T6 to consumer). That is, in the example of FIG. 7, the consumer can receive power from the supplier via the aggregator 1 and the aggregator 2.

(Processing flow of electric power trading system)
FIG. 8 is a flowchart showing an example of processing of the electric power trading system according to the second embodiment of the present disclosure.
Hereinafter, the processing flow in the electric power trading system 1 according to the present embodiment will be described with reference to FIG. Note that steps S100 to S114 of FIG. 8 have the same parts as the processing flow (FIG. 5) in the first embodiment, and therefore duplicate description will be omitted.

The first processing unit 100 of the supplier system 10 generates the supplier power information and registers it in the first blockchain BC1. Further, the notification unit 101 of the supplier system 10 notifies each of the plurality of aggregators of the supplier power information (step S100). The first processing unit 100 according to the present embodiment may notify the supplier power information only to the aggregators capable of transmitting power by the supplier, that is, only the aggregators 1 and 3 including the supplier in the service range. .. Then, the supplier power information is registered in the second blockchains BC2a and BC2c (step S101).

Further, when the second processing unit 200 of the aggregator system 20 can transmit power outside its own service range via another aggregator, the acquired supplier power information is further transmitted to the other aggregator (step S201). .. In the example of FIG. 7, the aggregator 1 can transmit power to the service range R2 of the aggregator 2 via the substation T5. Therefore, the second processing unit 200 of the aggregator 1 (aggregator system 20a) transmits the acquired supplier power information to the aggregator 2. Then, the supplier power information transmitted from the aggregator 1 is registered in the second blockchain BC2b of the aggregator 2 (step S202).

The acquisition unit 300 of the consumer system 30 makes inquiries to each of the plurality of aggregators regarding the electric power that the consumer wants to purchase (step S102). At this time, the acquisition unit 300 may make an inquiry only to the aggregator capable of transmitting power to the consumer, that is, the aggregators 2 and 3 including the consumer in the service range.

When the second processing unit 200 of the aggregator system 20 receives an inquiry from a consumer, it generates aggregator power information including the retail price for the consumer (step S103), and the consumer together with information indicating whether or not the power can be sold. (Step S104).

Further, the second processing unit 200 requests the other aggregator to provide the aggregator power information when the power can be transmitted outside the service range of the other aggregator via the other aggregator (step S203). In the example of FIG. 8, the second processing unit 200 of the aggregator 2 (aggregator system 20b) requests the aggregator 1 to provide the aggregator power information. Then, the second processing unit 200 of the aggregator 1 (aggregator system 20a) sets the retail price including the power transmission cost of the aggregator 1 (in the example of FIG. 7, the power transmission cost from the supplier to the substation T5), and sets the aggregator. Power information is generated and notified to the aggregator 2 (step S204).

Next, the second processing unit 200 of the aggregator 2 (aggregator system 20b) adds the transmission cost of the aggregator 2 (in the example of FIG. 7, the substation) to the retail price (first retail price) of the aggregator power information acquired from the aggregator 1. The retail price (second retail price) of the aggregator 2 is set by further adding (transmission cost from T or 5 to the consumer). The aggregator 2 generates aggregator power information including the calculated second retail price (step S205), and notifies the consumer together with the information indicating whether or not the power can be sold (step S104).

The processing flow of steps S105 to S114 is the same as that of the first embodiment. In the present embodiment, when an order is placed from the aggregator 2 selected by the consumer, the selected aggregator 2 first determines whether or not the order can be received (step S107). When the aggregator 2 cannot receive an order (step S107: NO), the consumer is notified of the failure (step S111), and when the order can be received (step S107: YES), the aggregator 2 further sends the aggregator 1 to the aggregator 1. The transaction related to the order is sent. The aggregator 1 determines whether or not to accept an order in the same manner as when receiving an order (step S107'). When the aggregator 1 can receive an order (step S107': YES), the aggregator 1 places an order with the supplier (step S109'). On the other hand, when the aggregator 1 cannot receive an order (step S107': NO), the aggregator 2 is notified of the failure (step S111'). The notification of failure is also notified from the aggregator 2 to the consumer (step S111). Further, if the supplier determines that the order cannot be received (step S110: NO), the aggregator 1 is notified of the failure (step S111'), and if it is determined that the order can be received (step S110: YES), The aggregator 1 is notified of the execution (step S112'). The notification of the contract or failure is also notified from the aggregator 1 to the aggregator 2 (steps S111 and S112). Therefore, if any of the supplier, the aggregator 1, and the aggregator 2 can receive an order, the consumer receives a notification of the contract (step S114), and one of these three cannot receive an order. If, the notification of failure is received (step S113). When the consumer receives the result of failure, he / she may return to step S105 and select another aggregator (for example, aggregator 3) to place an order, as in the first embodiment.

(Action effect)
In the conventional mechanism, the consumer can carry out electric power trading only with an aggregator (aggregator 3 in the example of FIG. 7) that includes both the supplier and the consumer in the service range. However, since the electric power trading system 1 according to the present embodiment can connect a plurality of aggregators to transmit power, it is possible to increase the number of aggregators that can be selected by the consumer.
Further, in the example of FIG. 7, since the aggregator 3 has a service range R3 wider than that of the aggregators 1 and 2, the power transmission cost may increase due to the management cost of the power grid and the like. In this case, the retail price of the aggregator 2 (retail price including the transmission cost of the aggregators 1 and 2) may be lower than the retail price of the aggregator 3 (retail price including the transmission cost of the aggregator 3). Even in such a case, the consumer can select a cheaper aggregator by referring to the retail prices of the aggregators 2 and 3 respectively.

<Third embodiment>
Next, the electric power trading system 1 according to the third embodiment of the present disclosure will be described.
The components common to the first and second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 9 is a flowchart showing an example of processing of the electric power trading system according to the third embodiment of the present disclosure.
In the electric power trading system 1 according to the present embodiment, the consumer system 30 places an order for electric power purchase from a plurality of aggregators. Hereinafter, the processing flow of the electric power trading system 1 according to the present embodiment will be described with reference to FIG.

As shown in FIG. 9, in the consumer system 30 according to the present embodiment, the selection unit 301 executes steps S301 and S302 instead of steps S105 to S106 in FIG.

The selection unit 301 refers to the aggregator power information acquired from the plurality of aggregators, and selects a plurality of aggregators when there is no aggregator that satisfies the desired power purchase amount preset by the consumer (step S301). For example, when the desired power purchase amount is satisfied by summing up the transmittable powers of both aggregators 1 and 2, the selection unit 301 selects these two aggregators 1 and 2 (step S301).

Next, the selection unit 301 instructs the third blockchain BC3 to place an order for power purchase to the selected aggregators 1 and 2. At this time, the selection unit 301 also specifies the purchase amount from each aggregator. In the example of FIG. 9, the selection unit 301 instructs the aggregator 1 to purchase one-third of the desired power purchase amount and the aggregator 2 to purchase two-thirds of the desired power purchase amount. Upon receiving the instruction from the consumer system 30, the transaction generation unit 310 of the third blockchain BC3 generates and selects a transaction including a smart contract related to the power purchase contract with the selected aggregators 1 and 2, respectively. An order is placed to the aggregator 1 by transmitting the power to the second blockchains BC2a and BC2b of the aggregator 1 and 2 (step S302).

The processing flow of steps S107 to S114 is the same as that of the first embodiment. In the present embodiment, both the aggregator 1 and the aggregator 2, which are the ordering parties of the consumer, determine whether or not to accept the order (step S107). In each of the aggregator 1 and the aggregator 2, if the order cannot be received (step S107: NO), the consumer is notified of the failure (step S108), and if the order can be received (step S107: YES), the order is placed with the supplier. It is performed (step S109). The supplier determines whether or not an order can be received for each of the aggregator 1 and aggregator 2 orders (step S110). Each of the aggregator 1 and the aggregator 2 is notified of the failure (step S111) when the supplier is unable to receive an order (step S110: NO), and is notified of the contract when the supplier is able to receive an order (step S110: YES). To. The notification of the failure or execution is also notified to the consumer (steps S113 and S114). When the consumer receives the notification of failure from one or more aggregators (step S113), the consumer returns to step S301 and reselects another aggregator to replace the failed aggregator to place an order. You may. When only one aggregator is unsuccessful, the consumer may select only one alternative aggregator or may select a plurality of alternative aggregators.

(Action effect)
As described above, in the electric power trading system 1 according to the present embodiment, the selection unit 301 of the consumer system 30 can select a plurality of aggregators and place an order for electric power purchase. As a result, even if the electric power that can be transmitted by each aggregator is insufficient, the consumer can secure the desired amount of electric power purchase.

Further, by transmitting power via a plurality of aggregators in this way, it is not necessary to provide equipment capable of transmitting and distributing power even if demand is concentrated, but to construct a power transmission network that satisfies the demand in the entire power trading system 1. Is possible. Further, in the electric power trading system 1, there is an incentive on the consumer side to suppress the amount of electric power used during congestion. Therefore, the initial cost of the equipment, the maintenance cost, and the like can be reduced, and the electricity charge can be reduced accordingly.

<Fourth Embodiment>
Hereinafter, the electric power trading system 1 according to the fourth embodiment of the present disclosure will be described with reference to the drawings.

(overall structure)
FIG. 10 is a schematic view of the electric power trading system according to the fourth embodiment of the present disclosure.
In the electric power trading system 1 according to the present embodiment, the supplier and the consumer perform electric power trading via an aggregator. Consumers are businesses, ordinary households, etc. The suppliers are power generation companies, power transmission and distribution companies, and the like. An aggregator is a business operator that adjusts the supply-demand balance between the electric power required by a consumer and the electric power supplied by the supplier.

As shown in FIG. 10, the electric power trading system 1 includes a supplier system 10, an aggregator system 20, a consumer system 30, a first blockchain BC1, a second blockchain BC2, and a third blockchain BC3. ..

The supplier system 10 is a system that performs various processes on the supplier side related to electric power transactions.
Further, the supplier system 10 is connected to the first blockchain BC1. In the first blockchain BC1, information related to the electric power transaction of the supplier is registered. For example, as shown in FIG. 10, each of the plurality of suppliers may have a supplier system 10a to 10c and a first blockchain BC1a to BC1c.

The aggregator system 20 is a system that performs various processes on the aggregator side related to electric power trading.
Further, the aggregator system 20 is connected to the second blockchain BC2. A plurality of second blockchain BC2s are provided corresponding to each category of electric power supplied by the supplier, and information related to electric power transactions for each category of the aggregator is registered. The electric power category includes the power generation method, supply area, power generation scale, and the like.

For example, as shown in FIG. 10, when an aggregator mediates the transaction of electric power generated by solar power generation, wind power generation, and thermal power generation, the aggregator has a second blockchain BC2a corresponding to each of these power generation methods (categories). , BC2b, BC2d. Each of the second blockchains BC2a to BC2c can be connected to the first blockchain BC1a to BC1c of the supplier that supplies the power of the corresponding category. Further, the aggregator may have a second blockchain BC2d corresponding to all categories for consumers who want to purchase electricity regardless of the category. The second blockchain BC2d can be connected to all the first blockchains BC1a to BC1c of the supplier. Further, the aggregator may have a second blockchain BC2 corresponding to a plurality of categories satisfying a predetermined condition. For example, as shown in FIG. 10, the aggregator may have a second blockchain BC2e corresponding to photovoltaic power generation and wind power generation capable of supplying electric power derived from natural energy. The second blockchain BC2e can be connected to the supplier's first blockchains BC1a and BC1b. As a result, for example, a consumer who thinks that any electric power derived from renewable energy may be used can easily carry out a transaction through the second blockchain BC2e corresponding to a plurality of categories.

In the present embodiment, a mode in which each of the plurality of aggregators has the aggregator systems 20a to 20d and the second blockchain BC2a to BC2d will be described, but the present invention is not limited to this. In other embodiments, one aggregator may have one aggregator system 20 and a plurality of second blockchain BC2s. Further, there may be a plurality of second blockchain BC2s corresponding to the same category.

The consumer system 30 is a system that performs various processes on the consumer side related to electric power transactions.
Further, the consumer system 30 is connected to the third blockchain BC3. The third blockchain BC3 can be connected to the second blockchain BC2 corresponding to the category preset by the consumer among the plurality of second blockchain BC2, and the information related to the electric power transaction of the consumer is registered. To.
Note that FIG. 10 shows an example in which only one consumer exists for the sake of simplification of the explanation, but the present invention is not limited to this. In other embodiments, there may be multiple consumers. In this case, each consumer has a consumer system 30 and a third blockchain BC3, respectively.

The format of the data (information) registered in each of the first blockchain BC1, the second blockchain BC2, and the third blockchain BC3 is set independently by each of the supplier, aggregator, and consumer who manages these blockchains. Will be done. In addition, this format may be changed according to the individual circumstances of the supplier, the aggregator, and the consumer.

Further, the first blockchain BC1 and the second blockchain BC2 are connected so as to be able to communicate using interleisure. The same applies to the second blockchain BC2 and the third blockchain BC3. Interledger is a mechanism for exchanging values and conducting transactions between ledgers (data) with different standards. For example, each blockchain according to the present embodiment has nodes that serve as connectors to other blockchains, and necessary data is exchanged between these nodes.

(Functional configuration of supplier system and first blockchain)
FIG. 11 is a diagram showing a functional configuration of a supplier system and a first blockchain according to a fourth embodiment of the present disclosure.
As shown in FIG. 11, the supplier system 10 includes a first processing unit 100 and a notification unit 101. Further, each of the plurality of first nodes 11 constituting the first blockchain BC1 includes a transaction generation unit 110, a block generation unit 111, a data registration unit 112, a contract processing unit 113, and a storage medium 114. There is.

The first processing unit 100 of the supplier system 10 generates the supplier electric power information regarding the electric power that can be supplied by the supplier and registers it in the first blockchain BC1. The supplier power information includes, for example, the power that can be supplied indicating the power that can be supplied in a certain period, the selling price per unit power in the period (hereinafter referred to as "wholesale price"), the start time of the period, and the start time of the period. Information such as end time (supplyable time) and power category is included. The electric power category is information indicating the power generation method, supply area, power generation scale, and the like. Further, the supplier power information may include supplier identification information (supplier name, etc.).

The notification unit 101 of the supplier system 10 transmits the supplier power information generated by the first processing unit 100 to the second blockchain BC2 corresponding to the category. Specifically, the notification unit 101 designates the second blockchain BC2 corresponding to the category included in the supplier power information as the connection destination, and the supplier to the second blockchain BC2 designated via the interledger. Instruct the first blockchain BC1 to transmit the power information.

Further, when the transaction generation unit 110 is instructed by the supplier system 10 to notify the supplier power information, the transaction generation unit 110 transmits a transaction including the supplier power information to the second blockchain BC2 designated via the interledger. .. As a result, the transaction including the supplier power information is registered in the transaction pool of the second blockchain BC2.

The data acquired and generated by each unit is stored in the storage medium 114 of the first node 11 as information related to the power transaction of the supplier. For example, the storage medium 114 stores transactions generated by the transaction generation unit 110, block data generated by the block generation unit 111, and the like.

(Functional configuration of aggregator system and 2nd blockchain)
FIG. 12 is a diagram showing a functional configuration of an aggregator system and a second blockchain according to a fourth embodiment of the present disclosure.
As shown in FIG. 12, the aggregator system 20 includes a second processing unit 200 and a notification unit 201. Further, each of the plurality of second nodes 21 constituting the second blockchain BC2 includes a transaction generation unit 210, a block generation unit 211, a data registration unit 212, a contract processing unit 213, and a storage medium 214. There is.

The second processing unit 200 of the aggregator system 20 generates aggregator power information regarding the power that can be transmitted via the aggregator based on the supplier power information acquired from the first blockchain BC1, and registers the aggregator power information in the second blockchain BC2. To do. The aggregator power information includes, for example, the power that can be transmitted by the aggregator in a certain period, the selling price per unit power (hereinafter referred to as "retail price"), the start time and the end time (transmitable time) of the period, and so on. Contains information such as power categories. Further, the aggregator power information may include aggregator identification information (aggregator name, etc.).

In the present embodiment, the first blockchain BC1 transmits the supplier electric power information only to the second blockchain corresponding to the category included in the supplier electric power information. For example, as shown in FIG. 10, the first blockchain BC1a of the supplier performing the photovoltaic power generation transmits the supplier power information only to the second blockchain BC2a corresponding to the photovoltaic power generation. When the second blockchain BC2d corresponding to a plurality of categories exists, the first blockchain BC1a may also transmit the supplier power information to the second blockchain BC2d. By doing so, only the supplier power information and the aggregator power information of a specific category are registered in each of the plurality of second blockchain BC2s.

In addition, when the second processing unit 200 receives an inquiry from a consumer about the period when he / she wants to purchase, the desired amount of electric charge purchased during the period, etc., the second processing unit 200 generates information indicating whether or not the electric charge can be sold to the consumer, and the second blockchain. Register with BC2.

The data acquired and generated by each part is stored in the storage medium 214 of the second node 21 as information related to the power transaction of the aggregator. For example, the storage medium 214 stores transactions generated by the transaction generation unit 210, block data generated by the block generation unit 211, and the like.

(Functional configuration of consumer system and 3rd blockchain)
FIG. 13 is a diagram showing a functional configuration of the consumer system and the third blockchain according to the fourth embodiment of the present disclosure.
As shown in FIG. 13, the consumer system 30 includes an acquisition unit 300 and a selection unit 301. Further, each of the plurality of third nodes 31 constituting the third blockchain BC3 includes a transaction generation unit 310, a block generation unit 311, a data registration unit 312, a contract processing unit 313, and a storage medium 314. There is.

The acquisition unit 300 of the consumer system 30 acquires the aggregator power information from the second blockchain BC2 corresponding to the category preset by the consumer. For example, suppose a consumer has set up to purchase only the electricity generated by solar power generation. In this case, the acquisition unit 300 makes an inquiry to the second blockchain BC2a corresponding to the photovoltaic power generation regarding the electric power required by the consumer. This inquiry includes, for example, information such as the category of electric power desired by the consumer, the desired purchase period (start time and end time), the desired purchase amount in the desired purchase period, and the location information of the consumer (transmission destination). Is done.
When the consumer has set a plurality of categories, the acquisition unit 300 acquires the aggregator power information from each of the second blockchain BC2 corresponding to each category.

Further, the acquisition unit 300 acquires the information indicating whether or not the power can be sold and the aggregator power information, which are the responses from the second blockchain BC2, through the third blockchain BC3.

When the consumer has set a plurality of categories, the selection unit 301 of the consumer system 30 selects which category of power to purchase based on the aggregator power information corresponding to each category. For example, the selection unit 301 sets the first condition (at least one of the desired power purchase amount, the desired power purchase price, the response time until the power supply starts, and the priority of the category) set in advance by the consumer. Select one category to meet.

In addition, the selection unit 301 instructs the third blockchain BC3 to place an order for power purchase from the aggregator that provides the power of the selected category.

In the storage medium 314 of the third node 31, the data acquired and generated by each unit is stored as information related to the electric power transaction of the consumer. For example, the storage medium 314 stores transactions generated by the transaction generation unit 310, block data generated by the block generation unit 311 and the like.

(Processing flow of electric power trading system)
FIG. 14 is a flowchart showing an example of processing of the electric power trading system according to the fourth embodiment of the present disclosure.
Hereinafter, the processing flow in the electric power trading system 1 according to the present embodiment will be described with reference to FIG.

The first processing unit 100 of the supplier system 10 generates the supplier power information and registers it in the first blockchain BC1. Further, the notification unit 101 of the supplier system 10 notifies the aggregator of the supplier power information through the first blockchain BC1 and the second blockchain BC2 (step S1000). At this time, the first processing unit 100 transmits the supplier electric power information to the second blockchain BC2 corresponding to the category included in the supplier electric power information. In the example of FIG. 10, in the supplier system 10 of the supplier that supplies the electric power by the photovoltaic power generation, the first processing unit 100 supplies the supplier electric power information to the second blockchains BC2a and BC2d corresponding to the category of the photovoltaic power generation. To send. Similarly, the first processing unit 100 transmits the supplier electric power information regarding wind power generation to the second blockchains BC2b and BC2d, and transmits the supplier electric power information regarding thermal power generation to the second blockchains BC2c and BC2d. Then, the supplier power information related to the corresponding category is registered in the second blockchain BC2a to BC2d of the aggregator (step S1010).

The acquisition unit 300 of the consumer system 30 makes an inquiry regarding the purchase of electric power to the aggregator that provides the electric power of the category preset by the consumer (step S1020). This inquiry is transmitted to the aggregator system 20 through the first blockchain BC1 and the second blockchain BC2 corresponding to the set category. For example, when the consumer wants to purchase electric power by solar power generation, the acquisition unit 300 transmits an inquiry to the second blockchain BC2a corresponding to the solar power generation.

The consumer may set a plurality of categories. For example, a consumer may set up two categories, solar power and wind power, if he wishes to purchase any of the electricity derived from renewable energy. In this case, the acquisition unit 300 transmits an inquiry to the second blockchain BC2a corresponding to the solar power generation, and also inquires to the second blockchain BC2b corresponding to the wind power generation category as shown by the broken line in FIG. To send. In addition, the consumer may set all categories if the electric power may be in any category. In this case, the acquisition unit 300 may send an inquiry to each of the second blockchains BC2a to BC2c corresponding to each category, or may send an inquiry only to the second blockchain BC2d corresponding to all the categories. Good.

When the second processing unit 200 of the aggregator system 20 receives an inquiry from a consumer, it generates aggregator power information and determines whether or not to sell the power to the consumer (step S1030). For example, when a consumer wants to purchase electric power generated by photovoltaic power generation, the second processing unit 200 can transmit electric power and retail price based on the supplier electric power information registered in the second blockchain BC2a. To generate aggregator power information.

Specifically, the second processing unit 200 is capable of selling power to the consumer (power for which a power selling contract has not been concluded), up to the power that can be supplied included in the supplier power information. To set. In addition, the second processing unit 200 sets the transmittable power so as not to exceed the maximum transmission capacity of the transmission network used by the aggregator. Further, when a predetermined power among the powers that can be supplied by the supplier is assigned to the aggregator, the second processing unit 200 may set the power that can be transmitted within the range of the assigned powers.

Next, the notification unit 201 of the aggregator system 20 notifies the consumer of the aggregator power information and the information indicating whether or not the power can be received through the second blockchain BC2 and the third blockchain BC3 (step S1040). Then, the acquisition unit 300 of the consumer system 30 can acquire the aggregator power information notified from the aggregator system 20 and the information indicating whether or not the power can be sold through the third blockchain BC3.

When the consumer sets a plurality of categories, the selection unit 301 of the consumer system 30 determines the power satisfying the first condition set by the consumer based on the aggregator power information and the information indicating whether or not the power can be sold. Select one category (step S1050).

For example, the selection unit 301 selects a category based on the desired power purchase amount and the desired power purchase price preset by the consumer. In this case, the selection unit 301 can transmit power in excess of the desired power purchase amount preset by the consumer among the plurality of categories (information indicating that power can be sold has been notified), and the retail price is demand. Select a category that is lower than the person's desired power purchase price. When a plurality of aggregators satisfy these first conditions, the selection unit 301 selects the category having the lowest retail price.

Further, the selection unit 301 may select a category based on the response time until the power supply is started. In this case, the selection unit 301 selects the category having the earliest supply start time (response time) among the categories in which power can be sold. As a result, for example, when a consumer needs electric power urgently, the electric power can be purchased from the supplier who can supply the electric power earliest.

Further, the selection unit 301 may select a category based on the priority of the category. In this case, the selection unit 301 selects the category having the highest priority among the categories in which power can be sold.

The presence or absence of each condition (desired power purchase amount, desired power purchase price, response time, category priority) included in the above-mentioned first condition can be arbitrarily set by the consumer. In addition, the consumer may be able to specify the priority of these plurality of conditions. As a result, the selection unit 301 can select an appropriate category according to the wishes of the consumer.

Next, the selection unit 301 of the consumer system 30 instructs the third blockchain BC3 to place an order for power purchase to the second blockchain BC2 corresponding to the selected category. Upon receiving the instruction from the consumer system 30, the transaction generation unit 310 of the third blockchain BC3 generates a transaction including a smart contract related to the power purchase contract of the selected category, and the second block of the selected aggregator. By transmitting to the chain BC2 (in the example of FIG. 14, the second blockchain BC2a), an order is placed with the aggregator (step S1060).

Further, in the second blockchain BC2a of the aggregator, the contract processing unit 213 executes the smart contract included in the transaction received from the third blockchain BC3, and determines whether it is possible to receive an order (power sale) from the consumer (step). S1070). When the contract processing unit 213 cannot accept the order (step S1070: NO), the contract processing unit 213 notifies the third blockchain BC3 of the consumer of the failure (step S1080). For example, the contract processing unit 213 determines that the order cannot be received if the usage rate of the transmission path of the aggregator reaches a predetermined upper limit value before the order is placed from the consumer. On the other hand, when the contract processing unit 213 can receive an order as desired by the consumer (step S1070: YES), the contract processing unit 213 places an order with the supplier through the second blockchain BC2a for the electric power that the consumer wants to purchase (step S1070: YES). S1090).

Further, when an order is placed from the aggregator to the supplier, the transaction including this smart contract is transmitted to the first blockchain BC1 of the supplier, and the smart contract is further executed in the contract processing unit 113. Specifically, the contract processing unit 113 determines whether it is possible to sell power to the consumer, and if it is possible to sell power (step S1100: YES), makes a contract to the second blockchain BC2a of the aggregator. A notification is given (step S1120), and if power sales are not possible (step S1100: NO), a notification of failure is given to the second blockchain BC2a of the aggregator (step S1110). For example, the contract processing unit 113 determines that the electric power cannot be sold when the electric power that can be supplied changes before the order is placed by the consumer and the desired electric power purchase amount of the consumer cannot be supplied.

Further, the third blockchain BC3 of the consumer receives a notification of failure (step S1130) or a notification of execution (step S1140) through the second blockchain BC2a.

The processing from steps S1060 to S1110 is predetermined by the smart contract included in the transaction. Therefore, it is automatically processed by the first blockchain BC1, the second blockchain BC2, and the third blockchain BC3 without each of the supplier, the aggregator, and the consumer performing processing such as confirmation and approval.

Further, when the consumer receives the result of failure (step S1130), the consumer may return to step S1050 and select another category to place an order.

(Action effect)
As described above, the electric power trading system 1 according to the present embodiment includes a plurality of second blockchain BC2s corresponding to each of the electric power categories. As a result, the electric power trading system 1 can divide the electric power market for each electric power category and selectively buy and sell only the electric power of the category desired by the consumer. In addition, each of the supplier, aggregator, and consumer who is a participant of the electric power trading system 1 should track how much electric power of which category each participant bought and sold based on the information registered in each blockchain. Can be done.

Further, in the electric power trading system 1, the selection unit 301 of the third blockchain BC3 is from an aggregator and a supplier that satisfy the first condition set by the consumer based on the aggregator electric power information acquired from the second blockchain BC2. Generate a transaction containing a smart contract to buy electricity. As a result, the third blockchain BC3 can quickly proceed with the electric power transaction procedure without receiving an instruction to purchase electric power from the consumer. Further, since the smart contract can automate the procedure of electric power transaction in the first blockchain BC1 and the second blockchain BC2, it is possible to realize the contract conclusion in a short time. As a result, the electric power trading system 1 can follow the fluctuating supply and demand situation in real time.

Further, the first condition set by the consumer includes at least one of the desired power purchase amount, the desired power purchase price, the response time until the power supply starts, and the priority of the category. In addition, the consumer may be able to specify the priority of each condition included in these first conditions. As a result, the selection unit 301 of the third blockchain BC3 can select an appropriate category according to the wishes of the consumer.

<Fifth Embodiment>
Next, the electric power trading system 1 according to the fifth embodiment of the present disclosure will be described.
The components common to the fourth embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

(overall structure)
FIG. 15 is a schematic view of the electric power trading system according to the fifth embodiment of the present disclosure.
As shown in FIG. 15, the electric power trading system 1 according to the present embodiment further includes a storage battery system 40 owned by the storage battery owner and a fourth blockchain BC4. The storage battery owner is a business operator that adjusts the supply and demand of electric power by controlling the charging (purchasing) and discharging (selling) of the storage battery. That is, the storage battery owner participates in the electric power transaction as a supplier or a consumer depending on the supply and demand situation of the electric power market. The storage battery may be a storage battery of an electric vehicle.

The storage battery system 40 is a system that performs various processes related to discharging from the storage battery (selling power) and charging the storage battery (purchasing power).
Further, the storage battery system 40 is connected to the fourth blockchain BC4. The fourth blockchain BC4 can be connected to the second blockchain BC2 corresponding to the category preset by the storage battery owner. In the fourth blockchain BC4, information related to the owner's electric power transaction is registered.
Note that FIG. 15 shows an example in which only one storage battery owner exists for the sake of simplification of the description, but the present invention is not limited to this. In other embodiments, there may be multiple battery owners. In this case, each storage battery owner has a storage battery system 40 and a fourth blockchain BC4, respectively.

(Functional configuration of storage battery system and 4th blockchain)
FIG. 16 is a diagram showing a functional configuration of a storage battery system and a fourth blockchain according to a fifth embodiment of the present disclosure.
As shown in FIG. 16, the storage battery system 40 includes a third processing unit 400, a notification unit 401, an acquisition unit 402, and a selection unit 403. Further, each of the plurality of fourth nodes 41 constituting the fourth blockchain BC34 includes a transaction generation unit 410, a block generation unit 411, a data registration unit 412, a contract processing unit 413, and a storage medium 414. There is.

The third processing unit 400 of the storage battery system 40 generates storage battery power information regarding the power that can be supplied from the storage battery, and registers it in the fourth blockchain BC4. The storage battery power information includes, for example, the power that can be supplied from the storage battery in a certain period, the selling price per unit power in the period (hereinafter referred to as "wholesale price"), and the start time of the period. And information such as end time (supplyable time), power category, etc. is included. The electric power category is information indicating the power generation method, supply area, power generation scale, etc. of the electric power charged in the storage battery. Further, the storage battery power information may include identification information (owner name, etc.) of the storage battery owner.

The notification unit 101 of the storage battery system 40 transmits the storage battery power information generated by the third processing unit 400 to the second blockchain BC2 corresponding to the category. Specifically, the notification unit 401 designates the second blockchain BC2 corresponding to the category included in the storage battery power information as the connection destination, and the storage battery power information is supplied to the second blockchain BC2 designated via the interledger. Is instructed to the fourth blockchain BC4 to transmit.

The acquisition unit 402 of the storage battery system 40 acquires the aggregator power information from the second blockchain BC2 corresponding to the category preset by the storage battery owner. For example, suppose that the storage battery owner has set the storage battery to be charged only with the electric power generated by solar power generation. In this case, the acquisition unit 402 makes an inquiry to the second blockchain BC2a corresponding to the photovoltaic power generation regarding the electric power required by the storage battery owner. This inquiry includes, for example, information such as the category of electric power desired by the storage battery owner, the desired purchase period (start time and end time), the desired purchase amount during the desired purchase period, and the location information of the storage battery (transmission destination). Is done.
When the storage battery owner has set a plurality of categories, the acquisition unit 402 acquires the aggregator power information from each of the second blockchain BC2 corresponding to each category.

Further, the acquisition unit 402 acquires the information indicating whether or not the power can be sold and the aggregator power information, which are the responses from the second blockchain BC2, through the fourth blockchain BC4.

When the storage battery owner has set a plurality of categories, the selection unit 403 of the storage battery system 40 selects which category of power to purchase based on the aggregator power information corresponding to each category. For example, the selection unit 403 selects one category that satisfies the second condition (desired power purchase amount, desired power purchase price, and category priority) preset by the storage battery owner.

Further, the selection unit 403 instructs the fourth blockchain BC4 to place an order for power purchase from the aggregator that provides the power of the selected category.

The transaction generation unit 410 of the fourth node 41 generates a transaction related to the electric power transaction in the fourth blockchain BC4. The transaction generation unit 410 registers the generated transaction in the transaction pool of the fourth blockchain BC4 by transmitting the generated transaction to another fourth node 41. This transaction also includes storage battery power information generated by the storage battery system 40. Further, in the present embodiment, when the transaction generation unit 410 receives an instruction to order the electric power purchase from the storage battery system 40, the transaction generation unit 410 generates a transaction including a smart contract related to the purchase contract.

The block generation unit 411 of the fourth node 41 generates block data including a predetermined number of transactions registered in the transaction pool. The processing of the block generation unit 411 is the same as the processing of the block generation unit 111 of the first node 11 described above.

The data registration unit 412 of the fourth node 41 registers the block data in the fourth block chain BC4 by transmitting the block data generated by the block generation unit 411 to another fourth node 41. Further, the data registration unit 412 verifies the block data received from the other fourth node 41 and stores it in the storage medium 414. The process of the data registration unit 412 is the same as the process of the data registration unit 112 of the first node 11 described above.

The contract processing unit 413 of the fourth node 41 executes the processing related to the electric power transaction between the supplier, the consumer, and the aggregator by executing the smart contract included in the transaction. Depending on the content of the smart contract, a new transaction may be generated by the transaction generation unit 410.

The storage medium 414 of the fourth node 41 stores the data acquired and generated by each unit. For example, the storage medium 414 stores transactions generated by the transaction generation unit 410, block data generated by the block generation unit 411, and the like.

(Processing flow of electric power trading system)
FIG. 17 is a first flowchart showing an example of processing of the electric power trading system according to the fifth embodiment of the present disclosure.
Hereinafter, in the electric power trading system 1 according to the present embodiment, the flow of processing when the storage battery owner purchases electric power for charging the storage battery from the supplier will be described with reference to FIG.

The first processing unit 100 of the supplier system 10 generates the supplier power information and registers it in the first blockchain BC1. Further, the notification unit 101 of the supplier system 10 notifies the aggregator of the supplier power information through the first blockchain BC1 and the second blockchain BC2 (step S2000). Then, the supplier power information related to the corresponding category is registered in the second blockchain BC2 of the aggregator (step S2010).

The acquisition unit 402 of the storage battery system 40 makes an inquiry regarding power purchase to the aggregator that provides the power of the category preset by the storage battery owner (step S2020). This inquiry is transmitted to the aggregator system 20 through the fourth blockchain BC4 and the second blockchain BC2 corresponding to the set category (for example, the second blockchain BC2a corresponding to photovoltaic power generation). The storage battery owner may set a plurality of categories. The process in this case is the same as in step S1020 (FIG. 14) of the fourth embodiment.

When the second processing unit 200 of the aggregator system 20 receives an inquiry from the storage battery owner, it generates aggregator power information and determines whether or not to sell the power to the storage battery owner (step S2030). Further, the notification unit 201 of the aggregator system 20 notifies the storage battery owner of the aggregator power information and the information indicating whether or not the power can be received through the second blockchain BC2 and the fourth blockchain BC4 (step S2040). The processing of these steps S2030 to S2040 is the same as that of steps S1030 to S1040 (FIG. 14) of the fourth embodiment.

When the storage battery owner sets a plurality of categories, the selection unit 403 of the storage battery system 40 satisfies the second condition set by the storage battery owner based on the aggregator power information and the information indicating whether or not the power can be sold. Select one of the categories (step S2050). The process is the same as in step S1050 (FIG. 14) of the fourth embodiment.

Next, the selection unit 403 of the storage battery system 40 instructs the fourth blockchain BC4 to place an order for power purchase to the second blockchain BC2 corresponding to the selected category. Upon receiving the instruction from the storage battery system 40, the transaction generation unit 410 of the fourth blockchain BC4 generates a transaction including a smart contract related to the power purchase contract of the selected category, and the second blockchain of the selected aggregator. By transmitting to BC2 (in the example of FIG. 17, the second blockchain BC2a), an order is placed with the aggregator (step S2060).

The processing flow of steps S2070 to S2120 in the supplier and the aggregator is the same as in steps S1070 to S1120 (FIG. 14) of the fourth embodiment.

The fourth blockchain BC4 receives the result of failure (step S2130) or the result of execution (step S2140) from the second blockchain BC2a. When the storage battery owner receives the result of failure (step S2130), he / she may return to step S2050 and select another category to place an order.

FIG. 18 is a second flowchart showing an example of processing of the electric power trading system according to the fifth embodiment of the present disclosure.
Hereinafter, in the electric power trading system 1 according to the present embodiment, the flow of processing when the consumer purchases the electric power charged in the storage battery will be described with reference to FIG.

First, the third processing unit 400 of the storage battery system 40 sets the selling price (wholesale price) of the power charged in the storage battery based on the purchase price (purchasing price) of the power charged in the storage battery. Further, the third processing unit 400 generates the storage battery power information including the category of the power charged to the storage battery and the set wholesale price, and registers it in the fourth blockchain BC4. The notification unit 401 of the storage battery system 40 notifies the aggregator of the storage battery power information through the fourth blockchain BC4 and the second blockchain BC2 (step S2200). At this time, the third processing unit 400 transmits the storage battery power information to the second blockchain BC2 corresponding to the category included in the storage battery power information. Then, the storage battery power information related to the corresponding category is registered in the second blockchain BC2 of the aggregator (step S2210).

The acquisition unit 300 of the consumer system 30 makes an inquiry regarding the purchase of electric power to the aggregator that provides the electric power of the category preset by the consumer (step S2220). The process is the same as in step S1020 (FIG. 14) of the fourth embodiment.

When the second processing unit 200 of the aggregator system 20 receives an inquiry from a consumer, it generates aggregator power information and determines whether or not to sell the power to the consumer (step S2230). Further, the notification unit 201 of the aggregator system 20 notifies the consumer of the aggregator power information and the information indicating whether or not the power can be received through the second blockchain BC2 and the third blockchain BC3 (step S2240). These processes are the same as in steps S1030 to S1040 (FIG. 14) of the fourth embodiment.

When the consumer sets a plurality of categories, the selection unit 301 of the consumer system 30 determines the power satisfying the first condition set by the consumer based on the aggregator power information and the information indicating whether or not the power can be sold. Select one category (step S2250). The process is the same as in step S1050 (FIG. 14) of the fourth embodiment.

Next, the selection unit 301 of the consumer system 30 instructs the third blockchain BC3 to place an order for power purchase to the second blockchain BC2 corresponding to the selected category (step S2260). The process is the same as in step S1060 (FIG. 14) of the fourth embodiment.

Further, in the second blockchain BC2a of the aggregator, the contract processing unit 213 executes the smart contract included in the transaction received from the third blockchain BC3, and determines whether it is possible to receive an order (power sale) from the consumer (step). S2270). When the contract processing unit 213 cannot accept the order (step S2270: NO), the contract processing unit 213 notifies the third blockchain BC3 of the consumer of the failure (step S2280). On the other hand, when the contract processing unit 213 can receive the order as the consumer desires (step S2270: YES), the contract processing unit 213 orders the electric power that the consumer wants to purchase from the storage battery owner through the second blockchain BC2a (step S2270: YES). Step S2290).

Further, when an order is placed from the aggregator to the storage battery owner, the transaction including this smart contract is transmitted to the storage battery owner's fourth blockchain BC4, and the smart contract is further executed in the contract processing unit 413. Specifically, the contract processing unit 413 determines whether it is possible to sell power to the consumer, and if it is possible to sell power (step S2300: YES), makes a contract to the second blockchain BC2a of the aggregator. A notification is given (step S2320), and if power sales are not possible (step S2300: NO), a notification of failure is given to the second blockchain BC2a of the aggregator (step S2310).

Further, the first blockchain BC1 of the consumer receives a notification of failure (step S2330) or a notification of execution (step S2340) through the second blockchain BC2a. When the consumer receives the result of failure (step S2330), he / she may return to step S2250 and select another category to place an order.

In addition, in FIGS. 17 to 18, an example in which a storage battery owner buys and sells electric power through one second blockchain BC2 (for example, a second blockchain BC2a corresponding to photovoltaic power generation) corresponding to a specific category will be described. However, it is not limited to this. In another embodiment, the storage battery owner may purchase and sell power through different second blockchain BC2s. For example, a storage battery owner purchases power from the second blockchain BC2a corresponding to solar power generation and sells power through the second blockchain BC2e corresponding to multiple categories derived from natural energy (solar power generation and wind power generation). You may try to do it. As a result, the storage battery owner can sell the electric power not only to the consumer who desires only the electric power generated by solar power generation but also to the consumer who thinks that the electric power derived from natural energy may be used. That is, the storage battery owner can sell power to a plurality of consumers who have different hopes.

(Action effect)
As described above, the electric power trading system 1 according to the present embodiment further includes the fourth blockchain BC4 in which the information related to the electric power transaction of the storage battery owner is registered. As a result, the storage battery owner can buy and sell electricity by clarifying the origin of the electric power of the storage battery he owns. Also, regarding electric power transactions via storage batteries, it is possible to track how much electric power of which category each participant bought and sold based on the information registered in each blockchain.

Further, the fourth blockchain BC4 can purchase electric power for charging the storage battery from the supplier through the second blockchain BC2, and can sell the electric power charged in the storage battery to the consumer. As a result, the storage battery owner can purchase electric power according to the desired category from the supplier and store the electric power in the storage battery. Further, the consumer can purchase the electric power of the desired category from the storage battery owner even when the electric power supplied from the supplier is insufficient, for example.
Furthermore, the storage battery owner can quickly sell power to consumers who need immediate response by purchasing power from a supplier having a long response time until power supply and storing the power in the storage battery, for example. .. In this case, the third processing unit 400 of the storage battery system 40 may set the wholesale price higher as the response time is earlier.

<Sixth Embodiment>
Next, the electric power trading system 1 according to the sixth embodiment of the present disclosure will be described.
The components common to the fourth and fifth embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.

(overall structure)
FIG. 19 is a schematic view of the electric power trading system according to the sixth embodiment of the present disclosure.
As shown in FIG. 19, in the electric power trading system 1 according to the present embodiment, one aggregator has a plurality of second blockchains BC2a to BC2d. The aggregator divides its service provision range into a plurality of regions (first regions A to D), and sets the first region as a category of electric power. That is, the second blockchains BC2a to BC2d correspond to the first regions A to D, respectively. The aggregator presets the range of each first area according to, for example, administrative divisions (prefectures, municipalities, etc.), geographical conditions (mountains, plains, basins, etc.).

Further, the aggregator system 20 further sets the second regions R1 and R2 in which a plurality of adjacent first regions are integrated. For example, in the aggregator system 20 according to the present embodiment, as shown in FIG. 19, a second region R1 in which two first regions A and B are integrated and a second region in which two first regions C and D are integrated are used. Set with R2. The aggregator system 20 sets the mediation range of the electric power transaction to the second area when the predetermined third condition is satisfied, and sets the mediation range to the first area otherwise. Therefore, the aggregator system 20 normally mediates the electric power transaction of the supplier and the consumer of the first region A, but when the predetermined third condition is satisfied, the first regions A and B included in the second region R1. Mediate electricity transactions between both suppliers and consumers.

When the predetermined third condition is satisfied, the second blockchain BD2s belonging to the same second area are connected to each other so that various information registered in each can be exchanged via interleisure. In the example of FIG. 19, the second blockchains BC2a and BC2b corresponding to the first regions A and B included in the second region R1 can be connected via the interledger. Similarly, the second blockchains BC2c and BC2d corresponding to the first regions C and D included in the second region R2 can be connected via the interledger. Therefore, the aggregator system 20 can mediate the electric power transaction with the supplier existing in the first area B to the consumer existing in the first area A through the second blockchain BC2a and BC2b.

FIG. 20 is a flowchart showing an example of processing of the electric power trading system according to the sixth embodiment of the present disclosure.
Hereinafter, the processing flow of the aggregator system 20 according to the present embodiment will be described with reference to FIG. 20.

As shown in FIG. 20, the second processing unit 200 of the aggregator system 20 according to the present embodiment determines whether or not the predetermined third condition is satisfied for each region (step S3000). The predetermined third condition is set in advance according to, for example, a power generation method, a power generation scale, a number of suppliers, a number of consumers, a season, a past transaction history, etc. of a supplier existing in the first area. For example, when power is supplied by solar power generation in the first area A, the second processing unit 200 may set time, weather information, and the like as the third condition. In this case, for example, when the transaction target time is included in the time zone corresponding to the nighttime (step S3000: YES), the second processing unit 200 is considered to have a larger demand than the supply in the first region A. , The mediation range of the electric power transaction is set in the second region R1 (step S3010).

On the other hand, when the time to be traded is included in the time zone corresponding to the daytime and the weather condition is predicted to be good (step S3000: NO), the second processing unit 200 demands the amount in the first area A. Since it is considered that the supply amount commensurate with the above can be secured, the mediation range of the electric power transaction is set to the first region A.

The second processing unit 200 performs the processing of steps S3000 to S3020 in the same manner for the other areas (first areas B, C, D). In addition, the second processing unit 200 executes the processing of steps S3000 to S3020 for each area at predetermined intervals or every time the weather information or the like is updated.

Further, the processing when the second processing unit 200 sets the intermediary range to the second area R1 will be described with reference to FIG. 14 as an example. When an inquiry is received from a consumer in the first area A through the third blockchain BC3 and the second blockchain BC2a (step S1020), the second processing unit 200 receives the inquiry from the second blockchain BC2a to the first area A. In addition to acquiring the supplier power information, the supplier power information of the first area B is acquired from the second blockchain BC2b through interleisure. Then, the second processing unit 200 generates the aggregator power information based on the supplier power information of the first areas A and B, and notifies the consumer of whether or not the power can be sold (step S1040). When an order is received from the consumer (step S1060), the transaction generation unit 210 of the second blockchain BC2a executes a transaction including a smart contract related to the power purchase contract to the first blockchain BC1a via interledger. At the same time, a transaction including a smart contract related to a power purchase contract is transmitted to the first blockchain BC1b through the second blockchain BC2b to place an order with each supplier (step S1060).

(Action effect)
As described above, in the electric power trading system 1 according to the present embodiment, the second blockchain BC2 is connected so that the registered information can be exchanged with another second blockchain BC2 when the predetermined third condition is satisfied. To. As a result, if it is advantageous to integrate multiple regions for electric power transactions (for example, it is possible to secure supply according to demand), the second blockchain BC2 corresponding to each of the multiple regions Information (transactions) can be exchanged between each other to exchange electric power.

Further, in the example of FIG. 19, a plurality of second blockchain BC2s possessed by one aggregator can be connected to each other, but the present invention is not limited to this. In other embodiments, different aggregators may have a second blockchain BC2 for each service provision range of their own. In this case, the service provision range of each aggregator is set as the first region. By connecting the second blockchain BC2s to each other and exchanging information in this way, it is not necessary for the aggregator systems 20 of each aggregator to make inquiries and confirm orders received, and the processing related to electric power transactions can be expedited. It is possible to complete it.

(Hardware configuration)
FIG. 21 is a diagram showing an example of hardware configurations of a supplier system, an aggregator system, a consumer system, and a node according to at least one embodiment of the present disclosure.
Hereinafter, the hardware configuration of each part of the electric power trading system 1 according to the present embodiment will be described with reference to FIG. 21.

The computer 900 includes a processor 901, a main storage device 902, an auxiliary storage device 903, and an interface 904.

The above-mentioned supplier system 10, aggregator system 20, consumer system 30, and first to

third nodes

11, 21, and 31 are implemented in one or a plurality of computers 900, respectively. The operation of each of the above-mentioned functional units is stored in the auxiliary storage device 903 in the form of a program. The processor 901 reads a program from the auxiliary storage device 903, deploys it to the main storage device 902, and executes the above processing according to the program. Further, the processor 901 secures a storage area corresponding to each of the above-mentioned storage units in the main storage device 902 according to the program. Examples of the processor 901 include a CPU (Central Processing Unit), a GPU (Graphic Processing Unit), a microprocessor, and the like.

The program may be for realizing a part of the functions exerted on the computer 900. For example, the program may exert its function in combination with another program already stored in the auxiliary storage device 903, or in combination with another program mounted on the other device. In another embodiment, the computer 900 may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device) in addition to or in place of the above configuration. Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, some or all of the functions realized by the processor 901 may be realized by the integrated circuit. Such integrated circuits are also included as an example of a processor.

Examples of the auxiliary storage device 903 include HDD (Hard Disk Drive), SSD (Solid State Drive), magnetic disk, optical magnetic disk, CD-ROM (Compact Disc Read Only Memory), and DVD-ROM (Digital Versatile Disc Read Only). Memory), semiconductor memory, and the like. The auxiliary storage device 903 may be an internal medium directly connected to the bus of the computer 900, or an external storage device 910 connected to the computer 900 via the interface 904 or a communication line. When this program is distributed to the computer 900 via a communication line, the distributed computer 900 may expand the program to the main storage device 902 and execute the above processing. In at least one embodiment, the auxiliary storage device 903 is a non-temporary tangible storage medium.

Further, the program may be for realizing a part of the above-mentioned functions. Further, the program may be a so-called difference file (difference program) that realizes the above-mentioned function in combination with another program already stored in the auxiliary storage device 903.

Although some embodiments of the present invention have been described, these embodiments are examples and do not limit the scope of the invention. Various additions, omissions, replacements, and changes may be made to these embodiments without departing from the gist of the invention.

For example, the aggregator power information according to the first to third embodiments may further include demand forecast information of the transmission path used by the aggregator (maximum transmission capacity of the transmission path, prediction of usage rate, etc.). .. Further, the selection unit 301 of the consumer system 30 may select an aggregator by referring to the demand forecast information. For example, the selection unit 301 may select an aggregator with a high possibility of execution (low usage rate of the transmission path) based on the usage rate. Further, the selection unit 301 may select the aggregator having the lowest retail price among the aggregators having a predetermined usage rate or less. In this way, the consumer can more flexibly select the aggregator based on the demand forecast information and the retail price. In addition, the supplier can select an aggregator in consideration of the usage rate, so that a stable supply of electric power becomes possible.

Further, in the third embodiment, an example in which the selection unit 301 of the consumer system 30 selects a plurality of aggregators when the power that can be transmitted by the aggregator is less than the desired power purchase amount of the consumer has been described, but the present invention is limited to this. It will not be done. In another embodiment, the aggregator may order power purchases from a plurality of suppliers when the desired power purchase amount of the consumer exceeds the power that can be supplied from one supplier. In this case, the second processing unit 200 of the aggregator system 20 may set the transmittable power that is the sum of the powers that can be supplied from the plurality of suppliers in step S103, and generate the aggregator power information. Upon receiving an order from the consumer, the contract processing unit 213 of the aggregator orders the purchase of electric power from each of the plurality of suppliers in step S107.
By doing so, the aggregator can provide the electric power desired by the consumer.

Further, in the first to third embodiments described above, the second processing unit 200 of the aggregator system 20 responds to various states such as the planned power transmission amount or usage rate of the power transmission path, the time until the start of power supply to the consumer, and the like. An example of adjusting the retail price was explained. In another embodiment, the first processing unit 100 of the supplier system 10 may similarly adjust the wholesale price according to various states. For example, the first processing unit 100 sets the wholesale price higher as the power demand or the usage rate of the power transmission path increases. Further, the first processing unit 100 sets the wholesale price lower as the time until the start of power supply becomes longer.

Further, in the fourth to sixth embodiments described above, when the selection unit 301 of the consumer system 30 has selected a plurality of categories, the selection unit 301 selects one category satisfying the first condition (step of FIG. 14). Although the S1050) aspect has been described, the present invention is not limited to this. In another embodiment, the selection unit 301 may select a plurality of categories satisfying the first condition. As a result, even when the electric power that can be purchased from one supplier is less than the desired electric charge purchase amount, it is possible to purchase electric power from each of a plurality of suppliers and secure the desired electric power purchase amount.

Further, in the fourth to sixth embodiments described above, the second processing unit 200 of the aggregator system 20 responds to various states such as the planned power transmission amount or usage rate of the power transmission path, the time until the start of power supply to the consumer, and the like. An example of adjusting the retail price was explained. In another embodiment, the first processing unit 100 of the supplier system 10 may similarly adjust the wholesale price according to various states. For example, the first processing unit 100 sets the wholesale price higher as the power demand or the usage rate of the power transmission path increases. Further, the first processing unit 100 sets the wholesale price lower as the time until the start of power supply becomes longer.

<Additional notes>
The electric power trading system 1 and the electric power trading method described in the above-described embodiment are grasped as follows, for example.

According to the first aspect of the present disclosure, the electric power trading system includes a first blockchain owned by a supplier, a second blockchain owned by an aggregator, and a third blockchain owned by a consumer. The blockchain can be connected to each of the first blockchain and the third blockchain.
By doing so, the electric power trading system can carry out highly reliable electric power trading by linking the blockchains of the supplier, the aggregator, and the consumer.

According to the second aspect of the present disclosure, the electric power trading system according to the first aspect generates the supplier electric power information regarding the electric power that can be supplied by the supplier, and registers the first process in the first blockchain. A second processing unit that generates aggregator electric power information regarding electric power that can be transmitted via the aggregator based on the supplier electric power information acquired from the first blockchain and registers it in the second blockchain. A selection unit that selects at least one aggregator from the plurality of aggregators based on the aggregator power information acquired from the second blockchain, the first blockchain, the second blockchain, and the third. Each of the blockchains includes a contract processing unit that executes processing related to electric power transactions between the supplier, the consumer, and the selected aggregator.
As a result, the electric power trading system can connect and link the blockchains of each electric power trading participant (supplier, aggregator, consumer) without centralized management by a specific aggregator, and is reliable. High power trading can be done.

According to the third aspect of the present disclosure, in the electric power trading system according to the second aspect, the aggregator electric power information includes the transmittable electric power of the aggregator and the retail price per unit electric power, and the selection unit comprises. Select an aggregator in which at least one of the transmittable power and the retail price meets the conditions preset by the consumer.
By doing so, the consumer can easily select an aggregator that meets his / her desired conditions from a plurality of aggregators.

According to the fourth aspect of the present disclosure, in the electric power trading system according to the third aspect, the second processing unit sets the transmission cost according to the transmission path between the supplier and the consumer. The retail price is set in addition to the wholesale price per unit power of the supplier included in the supplier power information.
Aggregator transmission costs vary depending on the transmission route used, so even if one supplier's wholesale price is cheaper than another, the actual amount paid is higher than purchasing from another. It can be expensive. However, in the electric power trading system according to the above aspect, since the retail price including the transmission cost is presented to the consumer, the consumer can select a cheaper aggregator.

According to the fifth aspect of the present disclosure, in the electric power trading system according to the third or fourth aspect, the second processing unit is the planned power transmission amount of the power transmission path between the supplier and the consumer. The retail price is set based on the usage rate.
By doing so, the aggregator can raise the retail price to suppress further demand when it is predicted that the power demand is high (the planned transmission amount or usage rate of the transmission route is close to the upper limit). , Electricity trading volume can be adjusted.

According to the sixth aspect of the present disclosure, in the electric power trading system according to the fourth or fifth aspect, the second processing unit sets the retail price for each power transmission path when there are a plurality of the power transmission paths. ..
In this way, the aggregator can adjust the retail price to guide the consumer to a specific transmission path (for example, a vacant transmission path).

According to the seventh aspect of the present disclosure, in the electric power trading system according to any one of the third to fifth aspects, the second processing unit is said to respond to the time until the start of power supply to the consumer. Set the retail price.
By doing so, the aggregator can set the retail price as the time until the start of power supply becomes longer, and encourage the consumer to purchase the power at an early stage. As a result, the aggregator can easily grasp the future electricity transaction volume from an early stage.

According to the eighth aspect of the present disclosure, in the electric power trading system according to any one of the third to sixth aspects, the second processing unit uses the electric power that can be supplied by the supplier as an upper limit, and the consumer. The power that can be sold is set as the power that can be transmitted.
By doing so, the aggregator can more accurately provide the amount of electric power that can be transmitted to the consumer.

According to the ninth aspect of the present disclosure, in the electric power trading system according to the eighth aspect, the second processing unit is a plurality of the supply obtained from the plurality of first blockchains owned by the plurality of suppliers. Based on the personal power information, the transmittable power is set based on the total value of the powers that can be supplied from the plurality of suppliers.
By doing so, the aggregator can add up the available power of a plurality of suppliers even if the available electric power of one supplier is less than the desired amount of electric charge of the consumer, and the aggregator can add the electric power of the consumer. It is possible to provide electric power according to the desired amount of electric power purchased.

According to the tenth aspect of the present disclosure, in the electric power trading system according to any one of the second to tenth aspects, the second processing unit is the planned power transmission amount or the usage rate in the power transmission path to the consumer. If exceeds a predetermined value, it is determined that the power cannot be sold to the consumer, and the information indicating that the power cannot be sold is notified to the consumer.
By doing so, the aggregator can adjust the amount of electricity traded to the consumer.

According to the eleventh aspect of the present disclosure, in the electric power trading system according to any one of the second to tenth aspects, the contract processing unit is the electric power desired by the consumer in the supplier and the aggregator. It is determined whether or not an order can be accepted, and the determination result is notified to the third blockchain through the first blockchain and the second blockchain, and the selection unit selects the last time when the determination result indicating that the order cannot be received is notified. Select an aggregator that is different from the aggregator.
For example, from the time when a consumer acquires the aggregator power information to the time when an order is placed, a contract with another consumer may be concluded, the power that can be transmitted by the aggregator may change, and an order may not be accepted. Even in such a case, the consumer can increase the possibility of purchasing the desired electric power by reselecting another aggregator and placing an order.

According to the twelfth aspect of the present disclosure, in the electric power trading system according to any one of the second to eleventh aspects, the aggregator power information includes demand forecast information of a power transmission path used by the aggregator. ..
By doing so, the consumer can more flexibly select the aggregator based on the demand forecast information. In addition, the supplier can select an aggregator in consideration of the usage rate, so that a stable supply of electric power becomes possible.

According to the thirteenth aspect of the present disclosure, in the electric power trading system according to the third to ninth aspects, the selection unit is the case where the power transmission possible amount is smaller than the desired power purchase amount preset by the consumer. , Select a plurality of said aggregators.
As a result, even if the electric power that can be transmitted by each aggregator is insufficient, the consumer can secure the desired amount of electric power purchase.

According to the fourteenth aspect of the present disclosure, in the electric power trading system according to any one of the second to twelfth aspects, the contract processing unit satisfies the desired power purchase amount preset by the consumer. , Perform the contract processing with the plurality of the suppliers.
By doing so, the aggregator can provide the electric power desired by the consumer.

According to the fifteenth aspect of the present disclosure, in the electric power trading system according to any one of the second to the fourteenth aspects, the second processing unit transmits power to the consumer among the plurality of aggregators. The aggregator power information regarding the first aggregator is further generated based on the aggregator power information regarding the second aggregator capable of transmitting power to the first aggregator.
In the conventional mechanism, the consumer can trade electricity only with an aggregator that includes both the supplier and the consumer in the service range. However, since the electric power trading system according to the above aspect can connect a plurality of aggregators to transmit power, it is possible to increase the number of aggregators that can be selected by the consumer.

According to the sixteenth aspect of the present disclosure, in the electric power trading system according to any one of the second to fifteenth aspects, between the first blockchain and the second blockchain, and the second. The blockchain and the third blockchain are connected to each other so as to be communicable using interledgers.
By doing so, the supplier, the aggregator, and the consumer can use the interleisure to use the first blockchain BC1 of the supplier, the second blockchain BC2 of the aggregator, and the third blockchain of the consumer, respectively. It is possible to transfer various data related to electric power transactions registered in. Moreover, even if the specifications of the data registered in each blockchain are different, they can be exchanged by the interleisure mechanism. This makes it easy for suppliers, aggregators, and consumers to freely design and modify their own blockchains.

According to the 17th aspect of the present disclosure, the electric power trading method is an electric power trading method using a first blockchain owned by a supplier, a second blockchain owned by an aggregator, and a third blockchain owned by a consumer. The aggregator is based on a step of generating supplier electric power information regarding electric power that can be supplied by the supplier and registering the electric power in the first blockchain, and the supplier electric power information acquired from the first blockchain. At least one of the plurality of the aggregators based on the step of generating the aggregator electric power information regarding the electric power that can be transmitted via the second blockchain and registering the aggregator electric power information in the second blockchain and the aggregator electric power information acquired from the second blockchain. Power between the supplier, the selected aggregator, and the consumer in each of the steps of selecting one aggregator and the first blockchain, the second blockchain, and the third blockchain. It has a step of executing contract processing related to supply.

According to the eighteenth aspect of the present disclosure, in the electric power trading system according to the first aspect, information relating to the electric power transaction of the supplier is registered in the first blockchain, and the second blockchain is the supplier. A plurality of information relating to the power transaction of the aggregator according to the category are registered in each of the plurality of second blockchains, and the third blockchain is a plurality of the second blockchains. Among the blockchains, it is possible to connect to the second blockchain corresponding to the category preset by the consumer, and the information related to the electric power transaction of the consumer is registered.
As a result, the electric power trading system can divide the electric power market for each electric power category and selectively buy and sell only the electric power of the category desired by the consumer. In addition, each of the suppliers, aggregators, and consumers who are participants in the electricity trading system can track how much electricity in which category each participant bought and sold based on the information registered in each blockchain. it can.

According to the 19th aspect of the present disclosure, in the electric power trading system according to the 18th aspect, the information registered in the second blockchain includes the power that can be transmitted by the aggregator in a specific period, per unit electric power. At least one of the retail price, transmission available time, category, and identification information of the aggregator is included.
As a result, the consumer can acquire various information about the electric power that the aggregator can provide through the blockchain.

According to the twentieth aspect of the present disclosure, in the power trading system according to the nineteenth aspect, the retail price is the transmission cost according to the transmission path between the supplier and the consumer. It is set in addition to the wholesale price per unit power of.
Aggregator transmission costs vary depending on the transmission route used, so even if the wholesale price of one category is cheaper than that of another category, the actual amount paid will be higher than purchasing from another category. There is a possibility that it will end up. However, in the electric power trading system according to the above aspect, since the retail price including the transmission cost is presented to the consumer, the consumer can select a cheaper category.

According to the 21st aspect of the present disclosure, in the electric power trading system according to the 19th or 20th aspect, the retail price is the planned transmission amount or the usage rate of the transmission path between the supplier and the consumer. It is set based on.
By doing so, the aggregator can raise the retail price to suppress further demand when it is predicted that the power demand is high (the planned transmission amount or usage rate of the transmission route is close to the upper limit). , Electricity trading volume can be adjusted.

According to the 22nd aspect of the present disclosure, in the electric power trading system according to the 20th or 21st aspect, the retail price is set for each power transmission path when there are a plurality of the power transmission paths.
In this way, the aggregator can adjust the retail price to guide the consumer to a specific transmission path (for example, a vacant transmission path).

According to the 23rd aspect of the present disclosure, in the electric power trading system according to any one of the 19th to 22nd aspects, the retail price is set according to the time until the start of power supply to the consumer. ..
By doing so, the aggregator can set the retail price as the time until the start of power supply becomes longer, and encourage the consumer to purchase the power at an early stage. As a result, the aggregator can easily grasp the future electricity transaction volume from an early stage.

According to the 24th aspect of the present disclosure, in the electric power trading system according to any one of the 19th to 23rd aspects, the power that can be transmitted is supplied to the consumer up to the power that can be supplied by the supplier. The power that can be sold is set.
By doing so, the aggregator can more accurately provide the amount of electric power that can be transmitted to the consumer.

According to the 25th aspect of the present disclosure, in the electric power trading system according to any one of the 18th to 24th aspects, the second blockchain is the planned power transmission capacity or the usage rate in the power transmission path to the consumer. If exceeds a predetermined value, it is determined that the power cannot be sold to the consumer, and the first blockchain is notified of the information indicating that the power cannot be sold.
By doing so, the aggregator can adjust the amount of electricity traded to the consumer.

According to the 26th aspect of the present disclosure, in the electric power trading system according to any one of the 18th to 25th aspects, the third blockchain is the electric power category desired by the consumer, the desired purchase period, and the like. Inquiry information including the desired power purchase amount and the position information of the consumer is transmitted to the second blockchain, and the second blockchain is divided into the inquiry information and the information registered in the second blockchain. Based on this, a response including whether or not to sell the electric power to the consumer is transmitted to the third blockchain.
By doing so, the consumer can know whether or not the electric power of the desired category can be purchased before placing an order.

According to the 27th aspect of the present disclosure, in the electric power trading system according to any one of the 18th to 26th aspects, the third blockchain is based on the information acquired from the connected second blockchain. Then, a category that satisfies the first condition set by the consumer is selected, and a transaction including a smart contract for purchasing power from the supplier is generated via an aggregator that provides power in the category.
As a result, the third blockchain can quickly proceed with the electric power transaction procedure without receiving an instruction to purchase electric power from the consumer. Further, since the smart contract can automate the procedure of electric power transaction in the first blockchain and the second blockchain, it is possible to realize the contract conclusion in a short time. As a result, the electric power trading system can follow the fluctuating supply and demand situation in real time.

According to the 28th aspect of the present disclosure, in the electric power trading system according to the 27th aspect, the first condition is the desired power purchase amount, the desired power purchase price, and the response until the power supply is started. Includes time and at least one of the priorities of the categories.
As a result, the electric power trading system can trade electric power by selecting an appropriate category according to the wishes of the consumer.

According to the 29th aspect of the present disclosure, in the electric power trading system according to the 28th aspect, the third blockchain is a category in which the lowest retail price is set when there are a plurality of categories satisfying the first condition. To generate the transaction.
By doing so, the consumer uses only the electricity generated in a specific area (for example, the location of the consumer), which is the policy regarding the purchase of electricity that he / she has set (for example, only the electricity derived from renewable energy is used). , Etc.), and cheaper electricity can be purchased.

According to the thirtieth aspect of the present disclosure, in the electric power trading system according to the 28th aspect, the third blockchain is a category in which the earliest response time is set when there are a plurality of categories satisfying the first condition. To generate the transaction.
By doing so, the consumer can purchase the necessary electric power while following the electric power purchase policy set by himself / herself even when the electric power is urgently required.

According to the 31st aspect of the present disclosure, in the electric power trading system according to the 28th aspect, when there are a plurality of categories satisfying the first condition, the third blockchain selects the category having the highest priority. Generates the transaction.
By doing so, the consumer can increase the possibility of purchasing the necessary electric power while following the electric power purchasing policy set by the consumer.

According to the 32nd aspect of the present disclosure, in the electric power trading system according to the 28th aspect, the third blockchain selects a plurality of categories from the categories satisfying the first condition to generate the transaction. To do.
By doing so, even if the amount of power that can be purchased from the consumer or one supplier is less than the desired amount of power purchased, power is purchased from each of a plurality of suppliers to secure the desired amount of power purchased. It becomes possible.

According to the 33rd aspect of the present disclosure, in the electric power trading system according to any one of the 27th to 32nd aspects, the first blockchain and the second blockchain are supplied based on the transaction. The person and the aggregator determine whether or not the consumer desires to receive an order for electric power, notify the third blockchain of the determination result through the first blockchain and the second blockchain, and the third blockchain determines the decision result. When the judgment result indicating that the order cannot be received is notified, a category different from the previously selected category is selected and a new transaction is generated.
For example, from the time a consumer obtains information from an aggregator to the time an order is placed, a contract with another consumer may be concluded, the power that can be transmitted by the aggregator may change, and an order may not be accepted. Even in such a case, the consumer can increase the possibility of purchasing the desired electric power by reselecting another category and placing an order.

According to the 34th aspect of the present disclosure, in the electric power trading system according to any one of the 18th to 33rd aspects, between the first blockchain and the second blockchain, and the second aspect. The blockchain and the third blockchain are connected to each other so as to be communicable using interledgers.
In this way, the supplier, aggregator, and consumer can use interledger to register with the supplier's first blockchain, the aggregator's second blockchain, and the consumer's third blockchain, respectively. It is possible to transfer various data related to the completed electric power transaction. Moreover, even if the specifications of the data registered in each blockchain are different, they can be exchanged by the interleisure mechanism. This makes it easy for suppliers, aggregators, and consumers to freely design and modify their own blockchains.

According to the 35th aspect of the present disclosure, the electric power trading system according to any one of the 18th to 34th aspects can be connected to the second blockchain corresponding to the category preset by the storage battery owner. , A fourth blockchain is further provided in which information relating to the electric power transaction by the storage battery owner is registered.
As a result, the storage battery owner can buy and sell electricity by clarifying the origin of the electric power of the storage battery he owns. Also, regarding electric power transactions via storage batteries, it is possible to track how much electric power of which category each participant bought and sold based on the information registered in each blockchain.

According to the 36th aspect of the present disclosure, in the electric power trading system according to the 35th aspect, the 4th blockchain is connected by the storage battery owner based on the information acquired from the connected 2nd blockchain. A category that satisfies the set second condition is selected, and a transaction including a smart contract for purchasing power from the supplier is generated via an aggregator that provides power in the category.
As a result, the storage battery owner can purchase electric power according to the desired category from the supplier and store the electric power in the storage battery.

According to the 37th aspect of the present disclosure, in the electric power trading system according to the 35th or 36th aspect, the third blockchain is the demand based on the information acquired from the connected second blockchain. Select a category that satisfies the first condition set by the person, and generate a transaction including a smart contract for purchasing power from the storage battery owner via an aggregator that provides power in the category.
As a result, the consumer can purchase the electric power of the desired category from the storage battery owner even when the electric power supplied from the supplier is insufficient, for example.

According to the 38th aspect of the present disclosure, in the electric power trading system according to any one of the 35th to 37th aspects, an interleisure is used between the second blockchain and the fourth blockchain. Connected to be communicable.
By doing so, the aggregator and the storage battery owner can use the interleisure to transfer various data related to the electric power transaction registered in each of the aggregator's second blockchain and the storage battery owner's fourth blockchain. It can be performed. Moreover, even if the specifications of the data registered in each blockchain are different, they can be exchanged by the interleisure mechanism. This makes it easy for battery owners to freely design and modify their own blockchain.

According to the 39th aspect of the present disclosure, in the electric power trading system according to any one of the 18th to 38th aspects, the second blockchain is registered when the third condition set by the aggregator is satisfied. The information provided is exchangeably connected to another second blockchain.
As a result, when it is advantageous to integrate multiple categories (for example, regions) for electric power trading, information (transactions) are exchanged between the second blockchain BC2s corresponding to each of the multiple categories. , Power can be interchanged.

According to the 40th aspect of the present disclosure, in the electric power trading system according to the 39th aspect, the third condition is the power generation method, the number of suppliers, the number of consumers, the season, and the power generation method of the supplier existing in the area. And set according to at least one of the past transaction history.
By doing so, the aggregator exchanges information between the second blockchains corresponding to each of the plurality of categories according to the amount of power supply or demand in a certain season, time zone, region, etc., for example. And can interchange power.

According to the 41st aspect of the present disclosure, in the electric power trading system according to any one of the 18th to 38th aspects, the category includes the power generation method, the supply area, and the power generation scale of the electric power supplied by the supplier. It is set based on at least one of them.
By doing so, the aggregator can correspond to various categories according to the electricity purchase policy of the consumer.

According to the 42nd aspect of the present disclosure, in the electric power trading system according to the 39th or 40th aspect, the category divides the service provision range of the aggregator into a plurality of regions, and corresponds to each of the regions. Set.
By doing so, the aggregator exchanges information between the second blockchains corresponding to each region according to the amount of power supply or demand, for example, and exchanges power between these regions. be able to.

According to the 43rd aspect of the present disclosure, in the electric power trading system according to the 39th or 40th aspect, the category is set corresponding to each of the service provision ranges of the plurality of the aggregators.
By doing so, the plurality of aggregators exchange information between the second blockchains corresponding to each aggregator according to, for example, the amount of power supply or demand, and the power is interchanged between these aggregators. You can meet each other. Further, by connecting the second blockchains to each other and exchanging information in this way, it is not necessary to make inquiries between the aggregator systems of each aggregator and confirm the ordering, etc., and the processing related to the electric power transaction can be expedited. It is possible to complete it.

According to the 44th aspect of the present disclosure, there are a plurality of electric power trading methods corresponding to a step of registering information related to the electric power transaction of the supplier in the first blockchain and a category of electric power supplied by the supplier. Each of the provided second blockchains has a step of registering information related to the electric power transaction of the aggregator according to the category, and the third blockchain is a category preset by the consumer among the plurality of the second blockchains. It has a step of connecting to a second blockchain corresponding to the above and registering information related to the electric power transaction of the consumer.

According to one aspect of the present disclosure, the reliability of electric power transactions can be improved by linking a plurality of blockchains.

Further, according to one aspect of the present disclosure, it is possible to select an electric power category and purchase electric power.

1 Power trading system 10 Supplier system 100 1st processing unit 101 Notification unit 11 1st node 110 Transaction generation unit 111 Block generation unit 112 Data registration unit 113 Contract processing unit 114

Storage media

20, 20a, 20b, 20c Aggregator system 200 2 Processing unit 201 Notification unit 21 Second node 210 Transaction generation unit 211 Block generation unit 212 Data registration unit 213 Contract processing unit 214 Storage medium 30 Consumer system 300 Acquisition unit 301 Selection unit 31 Third node 310 Transaction generation unit 311 Block generation Unit 312 Data registration unit 313 Contract processing unit 314 Storage medium

Claims

The first blockchain owned by the supplier,
The second blockchain of the aggregator and
The third blockchain owned by consumers and
With
The second blockchain can be connected to each of the first blockchain and the third blockchain.
Electricity trading system.
A first processing unit that generates supplier power information regarding power that can be supplied by the supplier and registers it in the first blockchain.
Based on the supplier power information acquired from the first blockchain, a second processing unit that generates aggregator power information regarding power that can be transmitted via the aggregator and registers it in the second blockchain.
A selection unit that selects at least one aggregator from the plurality of aggregators based on the aggregator power information acquired from the second blockchain.
In each of the first blockchain, the second blockchain, and the third blockchain, the contract processing related to the electric power transaction between the supplier, the consumer, and the selected aggregator is executed. Contract processing department and
The electric power trading system according to claim 1.
The aggregator power information includes the power that can be transmitted by the aggregator and the retail price per unit power.
The selection unit selects an aggregator in which at least one of the transmittable power and the retail price meets the conditions preset by the consumer.
The electric power trading system according to claim 2.
The second processing unit adds the transmission cost according to the transmission path between the supplier and the consumer to the wholesale price per unit electric power of the supplier included in the supplier electric power information. Set retail price,
The electric power trading system according to claim 3.
The second processing unit sets the retail price based on the planned transmission amount or usage rate of the transmission path between the supplier and the consumer.
The electric power trading system according to claim 3 or 4.
When there are a plurality of power transmission paths, the second processing unit sets the retail price for each power transmission path.
The electric power trading system according to claim 4 or 5.
The second processing unit sets the retail price according to the time until the start of power supply to the consumer.
The electric power trading system according to any one of claims 3 to 5.
The second processing unit sets the power that can be sold to the consumer as the power that can be transmitted, with the power that can be supplied by the supplier as the upper limit.
The electric power trading system according to any one of claims 3 to 6.
The second processing unit is a value obtained by adding up the powers that can be supplied from the plurality of suppliers based on the plurality of supplier power information acquired from the plurality of first blockchains owned by the plurality of suppliers. Set the transmittable power based on,
The electric power trading system according to claim 8.
When the planned power transmission amount or the usage rate in the power transmission path to the consumer exceeds a predetermined value, the second processing unit determines that the power cannot be sold to the consumer, and indicates that the power cannot be sold. Notify the consumer of the information,
The electric power trading system according to any one of claims 2 to 9.
The contract processing unit determines whether or not the supplier and the aggregator can receive an order for electric power desired by the consumer, and notifies the third blockchain of the determination result through the first blockchain and the second blockchain. ,
When notified of the determination result indicating that the order cannot be received, the selection unit selects an aggregator different from the previously selected aggregator.
The electric power trading system according to any one of claims 2 to 10.
The aggregator power information includes demand forecast information of a transmission path used by the aggregator.
The electric power trading system according to any one of claims 2 to 11.
The selection unit selects a plurality of the aggregators when the transmittable power is smaller than the desired power purchase amount preset by the consumer.
The electric power trading system according to any one of claims 3 to 9.
The contract processing unit executes the contract processing with a plurality of the suppliers so as to satisfy the desired power purchase amount preset by the consumer.
The electric power trading system according to any one of claims 2 to 12.
The second processing unit further obtains the aggregator power information regarding the first aggregator that transmits power to the consumer among the plurality of the aggregators, based on the aggregator power information regarding the second aggregator capable of transmitting power to the first aggregator. Generate,
The electric power trading system according to any one of claims 2 to 14.
The first blockchain and the second blockchain, and the second blockchain and the third blockchain are communicably connected using interledgers, respectively.
The electric power trading system according to any one of claims 2 to 15.
A power trading method using a first blockchain owned by a supplier, a second blockchain owned by an aggregator, and a third blockchain owned by a consumer.
A step of generating supplier electric power information regarding electric power that can be supplied by the supplier and registering the information in the first blockchain.
A step of generating aggregator power information regarding power that can be transmitted via the aggregator based on the supplier power information acquired from the first blockchain and registering the information in the second blockchain.
A step of selecting at least one aggregator from a plurality of the aggregators based on the aggregator power information acquired from the second blockchain, and a step of selecting the aggregator.
In each of the first blockchain, the second blockchain, and the third blockchain, the contract processing related to the power supply between the supplier, the selected aggregator, and the consumer is executed. Steps and
Power trading method with.
Information related to the power transaction of the supplier is registered in the first blockchain, and the information is registered.
A plurality of the second blockchains are provided corresponding to each category of electric power supplied by the supplier, and information relating to the electric power transaction of the aggregator according to the category is registered in each of the plurality of the second blockchains.
The third blockchain can be connected to the second blockchain corresponding to the category preset by the consumer among the plurality of second blockchains, and the information related to the electric power transaction of the consumer is registered. ,
The electric power trading system according to claim 1.
The information registered in the second blockchain includes at least one of the aggregator's transmittable power, the retail price per unit power, the transmittable time, the category, and the aggregator's identification information in a specific period. included,
The electric power trading system according to claim 18.
The retail price is set by adding the transmission cost according to the transmission path between the supplier and the consumer to the wholesale price per unit power of the supplier.
The electric power trading system according to claim 19.
The retail price is set based on the planned transmission amount or usage rate of the transmission path between the supplier and the consumer.
The electric power trading system according to claim 19 or 20.
The retail price is set for each transmission path when there are a plurality of transmission paths.
The electric power trading system according to claim 20 or 21.
The retail price is set according to the time until the start of power supply to the consumer.
The electric power trading system according to any one of claims 19 to 22.
The power that can be transmitted is set to the power that can be sold to the consumer, with the power that can be supplied by the supplier as an upper limit.
The electric power trading system according to any one of claims 19 to 23.
The second blockchain determines that it is impossible to sell power to the consumer when the planned power transmission capacity or the usage rate in the power transmission route to the consumer exceeds a predetermined value, and the first blockchain Notify information indicating that power cannot be sold to
The electric power trading system according to any one of claims 18 to 24.
The third blockchain transmits inquiry information including the category of electric power desired by the consumer, the desired purchase period, the desired amount of electricity purchased, and the location information of the consumer to the second blockchain.
The second blockchain transmits a response including whether or not to sell power to the consumer to the third blockchain based on the inquiry information and the information registered in the second blockchain.
The electric power trading system according to any one of claims 18 to 25.
The third blockchain selects a category that satisfies the first condition set by the consumer based on the information acquired from the connected second blockchain, and uses an aggregator that provides electric power for the category. Generate a transaction containing a smart contract to purchase electricity from the supplier.
The electric power trading system according to any one of claims 18 to 26.
The first condition includes at least one of the consumer's desired power purchase amount, desired power purchase price, response time until power supply starts, and priority of the category.
The electric power trading system according to claim 27.
When there are a plurality of categories satisfying the first condition, the third blockchain selects the category in which the lowest retail price is set and generates the transaction.
The electric power trading system according to claim 28.
When there are a plurality of categories satisfying the first condition, the third blockchain selects the category in which the earliest response time is set and generates the transaction.
The electric power trading system according to claim 28.
When there are a plurality of categories satisfying the first condition, the third blockchain selects the category having the highest priority and generates the transaction.
The electric power trading system according to claim 28.
The third blockchain selects a plurality of categories from the categories satisfying the first condition to generate the transaction.
The electric power trading system according to claim 28.
The first blockchain and the second blockchain determine whether or not the supplier and the aggregator can receive an order for electric power desired by the consumer based on the transaction, and the first blockchain and the second block Notify the third blockchain of the judgment result through the chain,
When the judgment result indicating that the order cannot be received is notified, the third blockchain selects a category different from the previously selected category and generates a new transaction.
The electric power trading system according to any one of claims 27 to 32.
The first blockchain and the second blockchain, and the second blockchain and the third blockchain are communicably connected using interledgers, respectively.
The electric power trading system according to any one of claims 18 to 33.
It is further provided with a fourth blockchain that can be connected to a second blockchain corresponding to a category preset by the storage battery owner and in which information relating to power transactions by the storage battery owner is registered.
The electric power trading system according to any one of claims 18 to 34.
The fourth blockchain selects a category that satisfies the second condition set by the storage battery owner based on the information acquired from the connected second blockchain, and provides an aggregator that provides power in the category. Generate a transaction containing a smart contract to buy power from the supplier through
The electric power trading system according to claim 35.
The third blockchain selects a category that satisfies the first condition set by the consumer based on the information acquired from the connected second blockchain, and via an aggregator that provides power for the category. Generate a transaction containing a smart contract to purchase power from the battery owner.
The power trading system according to claim 35 or 36.
The second blockchain and the fourth blockchain are communicably connected using interledgers.
The electric power trading system according to any one of claims 35 to 37.
The second blockchain is connected so that the registered information can be exchanged with another second blockchain if the third condition set by the aggregator is satisfied.
The electric power trading system according to any one of claims 18 to 38.
The third condition is set according to at least one of the power generation method, the number of suppliers, the number of consumers, the season, and the past transaction history of the supplier existing in the area.
The electric power trading system according to claim 39.
The category is set based on at least one of the power generation method, supply area, and power generation scale of the power supplied by the supplier.
The electric power trading system according to any one of claims 18 to 38.
The category divides the service provision range of the aggregator into a plurality of regions and is set corresponding to each region.
The electric power trading system according to claim 39 or 40.
The category is set corresponding to each of the service provision ranges of the plurality of the aggregators.
The electric power trading system according to any one of claims 39 or 40.
The step of registering the information related to the supplier's electricity transaction in the first blockchain,
A step of registering information related to the electric power transaction of the aggregator according to the category in each of a plurality of second blockchains provided corresponding to each of the electric power categories supplied by the supplier, and
A step of connecting the third blockchain to the second blockchain corresponding to a category preset by the consumer among the plurality of the second blockchains, and registering information related to the electric power transaction of the consumer.
Power trading method with.