JP7018558B2 - Electric power trading system - Google Patents

Description

The present invention relates to an electric power trading system using blockchain technology.

In recent years, since the full deregulation of electric power, electric power consumers from high-voltage corporations to low-voltage households have been able to trade electric power with various electric power retailers, and the sun has been selected from options such as the type of power source. It is also possible to select a power source that takes the environment into consideration, such as renewable energy such as photovoltaic power generation.

Patent Document 1 discloses a technique for preventing data tampering and ensuring transaction safety by recording and managing electric power transactions on the blockchain. In particular, in a private blockchain, an electrician It is stated that the security of blockchain transactions will be maintained by participating as a miner and giving a reward for block generation through mining.

Japanese Unexamined Patent Publication No. 2019-185412

However, since the technology disclosed in Patent Document 1 is a private blockchain, which is a network in which only miners authorized by a specific administrator can participate, it is still possible to tamper with data and secure transactions. Have a risk.

On the other hand, the need for renewable energy is increasing due to the growing interest in environmental issues and the strengthening of efforts by companies such as RE100, REACTION, ESG, and SDGs. There is an increasing need for power source traceability, such as visualizing the ratio of renewable energy to the amount and managing it as a KPI.

Here, in order to ensure traceability, the non-tampering of data is ensured when the power transaction record relating to which power supplier supplies power to which consumer is recorded in the blockchain as transaction information. Therefore, when using a public blockchain where transaction approval is performed by an unspecified number of nodes and miners instead of a specific administrator, if transaction information is recorded in the blockchain each time a transaction is performed, the number of transactions will be high. Transaction costs are incurred each time, which reduces effectiveness and economic efficiency.

Therefore, an object of the present invention is to provide a highly effective technique capable of ensuring the traceability of renewable energy while ensuring the non-tampering of data.

One embodiment of the present invention supplies power to a supplier terminal of one or more suppliers that supplies power including renewable energy, and a consumer terminal of one or more consumers that consumes power. A power transaction having a transmitter terminal of a transmitter that transmits power from a person to a consumer, and a management terminal that connects to the supplier terminal, the consumer terminal, and the transmitter terminal via a network and connects to a public blockchain network. It ’s a system,
The management terminal is the information about the first supplier, the information about the first consumer to which the first supplier supplies electric power, and the first unit time per predetermined unit time from the power transmission terminal. Acquiring the first electric energy amount information including the information about the electric power amount supplied to the first consumer by the supplier for a plurality of unit hours,
The electric energy information acquired for the plurality of unit hours is recorded in the public blockchain network as transaction information.

According to the present invention, it is possible to provide a highly effective technique capable of ensuring the traceability of renewable energy while ensuring the non-tampering of data.

It is a conceptual diagram explaining the electric power transaction by a supplier and a consumer by 1st Embodiment of this invention. It is a figure explaining the electric power trading system by 1st Embodiment of this invention. It is a functional block diagram of the management terminal which constitutes a power trading system. It is a functional block diagram of a consumer terminal constituting an electric power trading system. It is a figure explaining the detail of the consumer data by 1st Embodiment of this invention. It is a figure explaining the detail of the supplier data by 1st Embodiment of this invention. It is a figure explaining the detail of the electric energy information by 1st Embodiment of this invention. It is a figure explaining the detail of the transaction information by 1st Embodiment of this invention. It is a flowchart which concerns on the electric power transaction processing by 1st Embodiment of this invention.

The contents of the embodiments of the present invention will be described in a list. The electric power trading system according to the embodiment of the present invention (hereinafter, simply referred to as “system”) has the following configurations.
[Item 1]
One or more supplier terminals that supply power, including renewable energy, and one or more consumer consumer terminals that consume power, and transmission that transmits power from supplier to consumer. A power trading system having a power transmission terminal of a person, a supply terminal, a consumer terminal, and a management terminal connected to the power transmission terminal via a network and connected to a public blockchain network.
The management terminal is the information about the first supplier, the information about the first consumer to which the first supplier supplies electric power, and the first unit time per predetermined unit time from the power transmission terminal. Acquiring the first electric energy amount information including the information about the electric power amount supplied to the first consumer by the supplier for a plurality of unit hours,
The electric energy information acquired for the plurality of unit hours is recorded in the public blockchain network as transaction information.
Electric power trading system.
[Item 2]
The electric power trading system according to item 1.
The public blockchain network is an power transaction generation system that is Ethereum.
[Item 3]
The electric power trading system according to item 1.
The plurality of unit times correspond to a predetermined period, which is an electric power trading system.
[Item 4]
The electric power trading system according to item 3.
The management terminal performs a matching process of calculating the total amount of electric power supplied from the first supplier to the first consumer based on the first electric energy acquired for the plurality of units. Electricity trading system.
[Item 5]
The electric power trading system according to item 1.
The management terminal has information about a second supplier, information about a first consumer to which the second supplier supplies power, and the second, per predetermined unit time, from the power transmission terminal. Acquiring the second electric energy amount information including the information about the electric power amount supplied to the second consumer by the supplier for a plurality of unit hours,
The total amount of electric power supplied from the first supplier and the second supplier to the first consumer, respectively, based on the first electric energy amount and the second electric electric energy amount acquired for the plurality of units. A power trading system that calculates, performs matching processing.
[Item 6]
The electric power trading system according to item 1.
An electric power trading system in which the first consumer generates information on the amount of electric power supplied from the first supplier based on the transaction information recorded in the public blockchain.
[Item 7]
The electric power trading system according to item 1.
A power trading system that generates a hash value based on the power amount information acquired for a plurality of unit hours and records the hash value as the transaction information in the public blockchain network.

<First Embodiment>
Hereinafter, the system according to the embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a conceptual diagram illustrating a power transaction by a supplier and a consumer according to the first embodiment of the present invention.

As shown in FIG. 1, in the power transmission system 1 of the present embodiment, a plurality of electric power suppliers 10A and 10B (hereinafter referred to as “suppliers”) and a plurality of electric power providers that consume electric power supplied from the electric power suppliers. Electric power consumers 20A and 20B (hereinafter referred to as "consumers") are connected to each other via a power transmission network NW, and the consumer is a supplier of any of a plurality of suppliers, or a combination of suppliers. Make transactions to procure a certain amount of electricity, conclude a contract, and procure electricity.

Here, the suppliers 10A and 10B are, for example, a wind power generation company and a solar power generation company, respectively, and are other companies that supply power from renewable energy sources such as geothermal power generation, hydroelectric power generation, and biomass power generation. However, thermal power and nuclear power generation companies classified as non-renewable energy may also be included. Further, the supplier may be an individual power generation company, which is an individual consumer and generates electricity by placing sunlight on the roof of a detached house (so-called "prosumer"). The consumers 20A and 20B are composed of, for example, a low-voltage household, a low-voltage corporation, a high-voltage corporation, and the like. (Further details), non-renewable energy) and / or regions can be selected. For example, a consumer wants to use the renewable energy of a Fukushima operator (for example, wind power generation) as his / her own electricity, and directly makes a transaction with the Fukushima operator through this system to conclude a contract. In addition, it can be supplied with electricity from Fukushima operators. At the same time, the same consumer may want to receive power from a solar power generation company in Chiba, or may not be able to receive the desired amount of power from a wind power generation company in Fukushima. It is conceivable that power will be supplied from multiple companies, including a solar power generation company in Chiba, which is different from the wind power generation company in Fukushima.

However, especially when a consumer receives power supply from a plurality of businesses, it becomes difficult to track the power generated by each supplier and the supplied power enters the transmission network. Therefore, in the power transmission system 1, a measuring unit and a measurement unit that measures electric power at predetermined unit time (for example, 30 minutes) for each of the power generation device of the supplier and the power consumption device of the consumer, like a smart meter. By installing a device having a communication unit capable of transmitting the value to an external device, it is possible to monitor the supply / demand power of each supplier and each consumer.

FIG. 2 is a diagram illustrating a power trading system according to the first embodiment of the present invention.

As shown in FIG. 2, in the power trading system 2 of the present embodiment, a plurality of supplier terminals 100A and 100B and a plurality of consumer terminals 200A and 200B are connected to each other via a communication network NW. Further, it connects to the power transmission terminal 300 and the management terminal 400 via the same network. The supplier terminals 100A and 100B and the consumer terminals 200A and 200B are terminals managed by the suppliers and consumers corresponding to the suppliers 10A and 10B and the consumers 20A and 20B in the power transmission system 1 shown in FIG. Can be. Further, the power transmission terminal 300 can be a terminal managed by a business operator that operates and manages the power transmission network NW. The management terminal 400 can be a terminal managed by a business operator such as a so-called electric power retailer that operates and manages electric power transactions between a supplier and a consumer.

For example, the management terminal 400 receives basic information about the supplier and supply information (type of power supply of the supplier, electric energy, etc.) from the supplier terminals 100A and 100B, and relates to the consumer from the consumer terminals 200A and 200B. Receives basic information and demand information (region of supplier who wants to receive power supply, type of power supply, electric energy (ratio ratio), etc.). The management terminal 400 performs initial matching between the supplier and the consumer based on the demand information of the consumer, and determines the supplier to supply the electric power to the consumer. Here, as described above, in order to maximize the demand of the consumer for electric power while matching between the plurality of consumers and the plurality of suppliers, a plurality of suppliers are provided for a single consumer. Can also be matched.

After the matching is established, when a contract is concluded between the supplier and the consumer, the supplier actually supplies electric power to the consumer via the power transmission network NW shown in FIG. Here, the power transmission terminal 300 receives information on the amount of power supplied / demand from the smart meters installed in each of the power generation device or the power consumption device of the supplier and the consumer shown in FIG. 1 at predetermined unit times. It receives it, summarizes it as a fixed value every predetermined period (for example, one month), and transmits information about the amount of power to the management terminal 400 via the network.

As a result, the management terminal 400 executes a matching process for calculating the total amount of electric power supplied by one or more suppliers to a specific consumer for a predetermined period (for example, one month), and performs a matching process for a unit time. By maintaining the amount of power supplied and demanded for each, it is possible to ensure the traceability of power.

Further, in the power trading system 1, the management terminal 400 has a wallet and is connected to the public blockchain network NW. The management terminal 400 uses SHA256 or another hash function based on the information regarding the supply and demand power amount per unit time of the supplier and the consumer, which is output as a definite value for each predetermined period. Generate a hash value of and record it in the blockchain network as transaction information. Further, the total amount of electric power supplied by one or more suppliers to a specific consumer for a predetermined period (for example, one month) calculated by the above matching process is recorded in the blockchain network as transaction information. be able to. On the blockchain network, this block is generated based on the transaction information, the hash value recorded in the previous block, and the nonce value mined by the node, and is recorded following the previous block to form the blockchain. Will be done. Here, the hash generation and / or the recording of the transaction information in the blockchain can be performed not through the management terminal 400 but also via another terminal. In this case, the management terminal 400 transmits information (determined value) regarding the total amount of electric power calculated by the matching process and the supply and demand request amount for each unit time to the other terminals. Further, the management terminal 400 provides information on the total amount of electric power supplied by one or more suppliers to a specific consumer (and / or the supply and demand electric energy per unit time) calculated as the matching result. It can be recorded on the blockchain network as a smart contract. By using smart contracts, it is possible to automatically generate, approve and execute contracts related to electricity transactions between consumers and suppliers based on the above information on electric energy without going through a third party. .. In addition, smart contracts allow consumers, suppliers, and third parties to refer to transaction information without going through a management terminal, improving service convenience and reducing operating costs.

Here, as described above, the public blockchain approves transactions not by a specific administrator but by an unspecified number of nodes and miners, so that the data is more tamper-proof than the private blockchain. Since it can be secured and therefore the security of the transaction is guaranteed, it is preferable to use the public blockchain as the destination for recording the electric power transaction in the present embodiment. Examples of the public blockchain include Bitcon, Ethereum, and the like. For example, Ethereum has higher non-tampering property and reliability among public blockchains.

Therefore, in order to utilize Ethereum and reduce transaction costs, it is conceivable to reduce the frequency of recording transaction information on the blockchain network. Therefore, as described above, the electric power transaction system 1 replaces the method of recording the transaction information in each unit time, and collects the electric energy amount information in each unit time (for example, in units of 30 minutes) in a plurality of units. At least by collecting the power transaction information every 30 minutes as one transaction information for each predetermined period (for example, one month) composed of time, and recording it monthly without recording it in the blockchain network each time. Assuming that one month is 30 days and the consumer receives power from a single supplier, the record required 1440 times a month can be reduced to one record. Therefore, the transaction cost equivalent to 1439 times can be reduced. Furthermore, compared to the case where the consumer receives power from multiple suppliers and records the transaction record of the power supplied from one supplier every 30 minutes, and further records for multiple suppliers, more transactions. It will reduce the cost. Therefore, it is possible to ensure the non-tampering and reliability of data while ensuring the effectiveness of using a public blockchain such as Ethereum.

FIG. 3 is a functional block diagram of a management terminal constituting an electric power trading system.

The communication unit 110 is a communication interface for communicating with an external terminal via the network NW, and communication is performed according to a communication standard such as TCP / IP (Transmission Control Protocol / Internet Protocol).

The storage unit 120 stores programs for executing various control processes and functions in the control unit 130, input data, and the like, and is composed of a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. To. Further, the storage unit 120 is a consumer data storage unit 121 that stores various data related to the consumer, a supplier data storage unit 122 that stores various data related to the supplier, and a supplier for each unit time. The power data storage unit 123 that stores data related to the amount of power supplied to the consumer (the amount of power demanded by the consumer), and the data related to the above amount of power are supplied from the supplier to the consumer in a predetermined period. Stores transaction information including data related to the total amount of electric power, transaction data storage unit 124, and reports to consumers the details of electric power transactions as fixed values at predetermined periods, and stores report data. It has a report data storage unit 125. A database (not shown) storing various data may be constructed outside the storage unit 120 or the management terminal 400.

The control unit 130 controls the entire operation of the management terminal 400 by executing the program stored in the storage unit 120, and is composed of a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and the like. Will be done. As a function of the control unit 130, the amount of electric power supplied / demanded by the information receiving unit 131 that receives information from external terminals such as the supplier terminal 100, the consumer terminal 200, and the transmitter terminal 300, and the supplier and the consumer, respectively. The electric energy management unit 132 to be managed, the matching processing unit 133 to calculate the total amount of electric power supplied from the supplier to the consumer in a predetermined period, and the hash value of the electric energy amount for each unit time for a predetermined period. The transaction processing unit 135, which generates and records the electric power transaction as transaction information in the blockchain network, and the electric energy amount and ratio ratio supplied to the consumer for each supplier at predetermined intervals. It has a report generation unit 136 for generating and transmitting report data, which reports including the breakdown for each unit time.

Further, although not shown, the control unit 130 has an image generation unit and generates screen information to be displayed via a user interface of an external terminal such as a consumer terminal 200. For example, by using the image and text data stored in the storage unit 120 as a material and arranging various images and texts in a predetermined area of the user interface based on a predetermined layout rule, information displayed on the user interface can be obtained. Generate. Processing related to the image generation unit can also be executed by the GPU (Graphics Processing Unit).

In addition, the management terminal 400 further has a wallet necessary for recording transaction information for the blockchain network. The wallet can also be provided outside the management terminal 400.

FIG. 4 is a functional block diagram of a consumer terminal constituting an electric power trading system.

The consumer terminal 200 includes a communication unit 210, a display operation unit 220, a storage unit 230, and a control unit 240.

The communication unit 210 is a communication interface for communicating with the management terminal 400 via the network NW, and communication is performed according to a communication protocol such as TCP / IP.

The display operation unit 220 is a user interface used for the consumer to input an instruction and display text, an image, etc. according to the input data from the control unit 240, and the consumer terminal 200 is composed of a personal computer. If it is, it is composed of a display, a keyboard and a mouse, and if the consumer terminal 200 is composed of a smartphone or a tablet terminal, it is composed of a touch panel and the like. The display operation unit 220 is activated by a control program stored in the storage unit 230 and executed by the consumer terminal 200, which is a computer (electronic computer).

The storage unit 230 stores various control processes, programs for executing each function in the control unit 240, input data, and the like, and is composed of a RAM, a ROM, and the like. Further, the storage unit 230 temporarily stores the communication content with the management terminal 400.

The control unit 240 controls the overall operation of the consumer terminal 200 by executing a program stored in the storage unit 230, and is composed of a CPU, a GPU, and the like.

Although not shown, the supplier terminal 100 and the power transmission terminal 300 can have the same configuration as the consumer terminal 200.

FIG. 5 is a diagram illustrating details of consumer data according to the first embodiment of the present invention.

The consumer data 1000 shown in FIG. 5 stores various data related to the consumer acquired from the consumer via the consumer terminal 200. In FIG. 5, for convenience of explanation, an example of one consumer (a consumer identified by the consumer ID “10001”) is shown, but information of a plurality of consumers can be stored. As various data related to consumers, for example, basic information of consumers (customer's name (corporate name), user name, address, contact information, email address, attributes (low-voltage household, low-voltage corporation, high-voltage corporation), etc.) , Payment information (credit card number, bank account, etc.) regarding the payment method for power supply by the supplier, demand information (region of the supplier (power supply) desired by the consumer, ratio of the power supplied by the supplier to the total power amount Ratio, type of power source of supplier (wind force, solar power, geothermal power, hydraulic power, biomass, thermal power, nuclear power, etc.), designated supplier, etc.), and contract information (supplier, demand amount, ratio ratio, power source type, etc.) Can be included.

FIG. 6 is a diagram illustrating details of supplier data according to the first embodiment of the present invention.

The supplier data 2000 shown in FIG. 6 stores various data related to the supplier acquired from the supplier. In FIG. 6, for convenience of explanation, an example of one supplier (supplier identified by the supplier ID “2001”) is shown, but information related to a plurality of suppliers can be stored. As various data related to the supplier, for example, basic information (corporate name, region, power source type, etc.) and contract information (consumer, supply amount, ratio, etc.) related to the supplier can be included. Here, the present supplier data 2000 does not include information desired by the supplier for the consumer (for example, the type of the desired consumer, etc.), but the supplier indicates the region and attribute to the consumer. And when there is a desire in relation to the amount of electricity, the desired information can be collected from the supplier, and the supplier and the consumer can be matched based on the desired information (and / or the demand information).

FIG. 7 is a diagram illustrating details of electric energy information according to the first embodiment of the present invention.

The electric energy information shown in FIG. 7 is information on the electric energy measured in each of the smart meter installed in the power generation device of the supplier and the smart meter installed in the power consumption device of the consumer for each unit time. Yes, it is collected at the power transmission terminal as a preliminary value every unit time, and is aggregated as a final value of electric power trading after a predetermined period has elapsed.

As shown in FIG. 7, the electric energy information is supplied from the supplier to the consumer at every 30 minutes such as "7:00 to 7:30" on the date "April 10, 2019". Stores the amount of electricity consumed (consumed by the consumer). According to the electric power information shown in FIG. 7, it can be understood that electric power is supplied to the consumer from different suppliers at the same time. For example, between "7:00 to 7:30" on "April 10, 2019", from the supplier "20001" to the consumer "10001" "1.5kWh", and from the supplier "20005". It can be understood that the electric power of "2kWh" is supplied to the consumer "10001". In this way, the electric energy information can be used to track how many kWh of electric power is supplied from which supplier to which consumer for each unit time. Based on the information on the amount of electric power for each unit time, the matching process is performed to calculate the total amount of electric power, which supplier supplied how many kWh of electric power to which consumer in a predetermined period (for example, one month). It can be carried out.

FIG. 8 is a diagram illustrating details of transaction information according to the first embodiment of the present invention.

As shown in FIG. 8, for example, as a renewable energy power source, a supplier named "A solar power" located in Chiba generates 200kWh of power generation, and the consumer "Y municipality" located in Chiba and Kanagawa. It supplies electricity to the local consumer "Z manufacturing industry". Here, by aggregating the information of the supplier of electric power for each consumer of the current month and the total amount of the electric power supplied, transaction information indicating the electric power transaction of the current month can be generated. For example, the consumer "X kindergarten" can generate transaction information that 150kWh is supplied from "B wind power" in Fukushima and 100kWh is supplied from "C small hydropower" in Kanagawa.

FIG. 9 is a flowchart relating to the electric power transaction processing according to the first embodiment of the present invention.

First, as a process of S101, the information acquisition unit 131 of the control unit 130 of the management terminal 400 acquires information on the supply / demand power of each supplier and each consumer from the power transmission terminal 300 via the network NW. .. Here, in the present embodiment, the information acquisition unit 131 collects electric power from the smart meters installed in each supplier and each consumer in the power transmission terminal 300 every unit time (for example, 30 minutes). Information is aggregated as a fixed value for the current month for each predetermined period (1 month), but in another example, the power amount information is acquired for each unit time, and the management terminal side acquires the current month. It is also possible to summarize the information as a fixed value for the minute. The electric energy information acquired by the information acquisition unit 131 is managed by the electric energy management unit 132 of the control unit 130 and stored in the electric power data 123 of the storage unit 120.

Subsequently, the matching processing unit 133 of the control unit 130 obtains information on the supplier who supplied power to the consumer for each consumer in the current month based on the electric energy information for each unit time acquired in the previous step. A matching process is performed to identify and calculate the total amount of power supplied. The matching processing unit 130 stores the information regarding the amount of power supplied by one or more suppliers for each consumer, which is calculated as a result of the matching processing and is monthly, in the transaction data storage unit 124 of the storage unit 120. can do.

For example, as shown in FIG. 7, the matching processing unit 133 is generated from the supplier to the consumer based on the electric energy information acquired from each smart meter of the supplier and the consumer every 30 minutes. As shown in FIG. 8, based on the information on the amount of power supplied to the consumer (for example, the supplier information for supplying power to the consumer (for example, "Y municipality" in Chiba) (for example, "A solar power" in Chiba). , Fukushima's "B wind power" and Kanagawa's "C small hydropower"), and information on the total amount of electricity supplied by each supplier (for example, the total amount of electricity used by consumers "350kWh" On the other hand, "100kWh" is calculated from "A sunlight", "200kWh" is calculated from "B wind power", "50kWh" is calculated from "C small hydropower", etc.).

Next, in step S103, the transaction processing unit 135 of the control unit 130 generates a hash value based on the electric energy information acquired in step S101. That is, the transaction processing unit 135 collectively hashes the data array for a predetermined period (48 frames per day x 30 days) for the amount of power supplied from the consumer from the supplier for each unit time (for example, 30 minutes). Generate a one-line hash value using a function. The transaction processing unit 135 can store the generated hash value in the transaction data storage unit 124 of the storage unit 120.

Subsequently, in step S104, the transaction processing unit 135 informs the public blockchain about the monthly total of information and / or the amount of power supplied by one or more suppliers for each consumer as a result of the matching processing. The above hash value is recorded as transaction information. As described above, the transaction information is recorded not every unit time when the electric energy of the supplier and the consumer is aggregated, but at a predetermined period (for example, monthly). On the blockchain network, this block is generated based on the transaction information, the hash value recorded in the previous block, and the nonce value mined by the node, and is recorded following the previous block to form the blockchain. Will be done.

By recording transaction information on the public blockchain, it is possible to ensure non-tampering and transaction reliability compared to private blockchain, and by minimizing transaction recording, public block It is possible to suppress transaction costs on the chain and ensure the effectiveness of electric power transactions utilizing the public blockchain, especially the highly reliable Ethereum. At the same time, by referring to the transaction information, it is possible to track the power transaction between the supplier and the consumer for each unit time, and traceability can be ensured.

In addition, the report generation unit 136 of the control unit 130 supplies information on the amount of power supplied by one or more suppliers for each consumer and the supply for each unit time, which is generated as a result of the matching process and is totaled monthly. Based on the information about the electric energy, it is possible to generate a visualized report showing the breakdown of the electric energy by the supplier in chronological order to the consumer. Then, it becomes possible to obtain a certificate showing the reliability of the data from the blockchain. Further, in addition to the electric energy, the CO2 reduction amount can be expressed as an environmental KPI by, for example, the number of cedar trees, or can be displayed by using a comment or an image.

The embodiments described above are merely examples for facilitating the understanding of the present invention, and are not intended to limit the interpretation of the present invention. It goes without saying that the present invention can be modified and improved without departing from the spirit thereof, and the present invention includes its equivalents.

10 Supplier 11, 21 Smart meter 20 Consumer 100 Supplier terminal 200 Consumer terminal 300 Transmitter terminal 400 Management terminal

Claims (5)

One or more supplier terminals that supply power, including renewable energy, and one or more consumer consumer terminals that consume power, and transmission that transmits power from supplier to consumer. A power trading system having a power transmission terminal of a person, a supply terminal, a consumer terminal, and a management terminal connected to the power transmission terminal via a network and connected to a public blockchain network.
The management terminal is the information about the first supplier, the information about the first consumer to which the first supplier supplies electric power, and the first unit time per predetermined unit time from the power transmission terminal. Acquiring the first electric energy amount information including the information about the electric power amount supplied to the first consumer by the supplier for a plurality of unit hours,
The plurality of unit times correspond to a predetermined period, and the plurality of unit times correspond to a predetermined period.
The management terminal calculates the total amount of electric power supplied from the first supplier to the first consumer based on the first electric energy acquired for the plurality of units.
The total amount of the electric power is recorded in the public blockchain network as one transaction information together with the electric energy information acquired for the plurality of unit hours.
Electric power trading system. The electric power trading system according to claim 1.
The public blockchain network is an power transaction generation system that is Ethereum. The electric power trading system according to claim 1.
The management terminal has information about a second supplier, information about a first consumer to which the second supplier supplies power, and the second, per predetermined unit time, from the power transmission terminal. Acquiring the second electric energy amount information including the information about the electric power amount supplied to the second consumer by the supplier for a plurality of unit hours,
The total amount of electric power supplied from the first supplier and the second supplier to the first consumer, respectively, based on the first electric energy amount and the second electric electric energy amount acquired for the plurality of units. A power trading system that calculates, performs matching processing. The electric power trading system according to claim 1.
An electric power trading system in which the first consumer generates information on the amount of electric power supplied from the first supplier based on the transaction information recorded in the public blockchain. The electric power trading system according to claim 1.
A power trading system that generates a hash value based on the power amount information acquired for a plurality of unit hours and records the hash value as the transaction information in the public blockchain network.

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