KR20220155164A - System for trading electric power based on block chain and method thereof - Google Patents

Abstract

The present invention relates to a blockchain-based electricity trading system and a trading method therefor, which relate to direct electricity trading between electricity producers and consumers. The trading method comprises the steps of: receiving a first transaction block chain in which the amount of surplus power calculated by a member-registered photovoltaic prosumer is recorded; generating a bid list block chain having a plurality of transaction block chains including the first transaction block chain as block bodies; receiving a bid for any one transaction block chain among a plurality of transaction block chains of the bidding list block chain or receiving a purchase condition from an electric consumer who has registered as a member; and in case of receiving a bid from the electric consumer, processing a bid with the highest bid based on a bidding price of a bidder for a bid whose bidding ends every day and time, and recording the bid in a corresponding second transaction block chain.

Description

Blockchain-based power trading system and its trading method {SYSTEM FOR TRADING ELECTRIC POWER BASED ON BLOCK CHAIN AND METHOD THEREOF}

The present invention relates to a direct power transaction technology between a power producer and a consumer, and more particularly, in a solar power small-scale power generation environment, a stable direct power transaction between a photovoltaic power generation prosumer having surplus power from photovoltaic power generation and power consumers. It is about a blockchain-based electricity trading system and its trading method that enable transparent transactions.

Currently, the power trading method based on a central trading system with a vertical and closed structure in which a small number of suppliers sell electricity requires a change to a horizontal and open structure in which many operators buy and sell electricity by consumers in accordance with the spread of various distributed power sources. The boundary between 'consumption' and 'supply' is blurring, and the need for P2P electricity trading, in which consumers directly participate in the electricity market to buy and sell electricity, is increasing.

In particular, it is time to consider the aspects of power stabilization, the aspect of not building additional facilities that hate residents, and the cost of building grid infrastructure nationwide in terms of the Green New Deal. Rather than the current energy trading method based on the central trading system, it is necessary to think about ways to exchange energy under the distribution layer constituting each microgrid and balance energy supply and demand.

In particular, with the passing of the amendment to the Electricity Business Act, which permits power trading between neighbors and small-scale power brokerage business, the need for a system that can efficiently trade power between distributed resources, including individual stored power, to implement the revised system. this is increasing In Korea, solar power is a representative resource among small-scale distributed resources, and since electricity trading between them is not simply selling electricity to electric power companies, communication between all participants in electricity trading and between systems is required, and various transaction conditions and situation judgments are taken into account. There is a need for an efficient and transparent peer-to-peer (P2P) power trading technology.

KR10-2021-0012630

For stand-alone or block-type photovoltaic power generation in rural villages or islands where KEPCO system facilities are not installed, direct contracts are made online with the consumers (consumers) who need it and directly between the photovoltaic power generation prosumers and consumers who supply power. It is to provide a blockchain-based electricity trading system and its trading method that enables electricity trading (contract conclusion, power supply, payment) and enables transparent trading.

The two-way power trading server 20 of the blockchain-based power trading system according to an embodiment of the present invention communicates with the solar power generation prosumer 10 and the electricity consumer 30, and sells from the solar power generation prosumer 10. A contract connection unit 200 receiving a transaction block chain in which conditions are recorded; A block chain unit 100 for generating a list block chain from the transaction block chain; A transaction matching unit 300 that searches the sale conditions stored in the list block chain and the purchase conditions of the electric consumer 30, matches the highest price condition among conditions meeting the conditions, and records them as a contract in the transaction block chain; A schedule and execution unit that manages the electricity supply time schedule according to the contract of the transaction block chain and executes a command to distribute the electricity of the photovoltaic prosumer 10 to the electricity consumer 30 when the supply time arrives ( 410), and upon receiving the execution command, a control command is transmitted to the electricity storage device of the photovoltaic power generation prosumer 10 to discharge electricity, and the purchased electricity is delivered to the home of the electricity consumer 30 through switch control. A transaction fulfillment unit 400 having a device control unit 420 that controls supply so that a transaction is fulfilled; and a consumer settlement unit 510 that receives prepayment as a contract deposit for contract conclusion after the electric consumer 30 receives a successful bid for power transaction, and when the contract is normally completed and terminated, the contract deposit is used as the purchase price for the solar energy. a charge settlement unit 500 having a prosumer settlement unit 520 that pays the power generation prosumer 10; can include

In addition, the block chain unit 100 may record and update whether the transaction is normally performed, the time of the transaction, the end time of the transaction, and the amount of electricity traded in the transaction block chain.

In addition, the transaction matching unit 300 includes a manual matching unit 310 and an automatic matching unit 320, and the manual matching unit 310 provides the electricity consumer 30 with a bidding list in bidding, When the bidding time ends, a contract is concluded between the electric consumer 30 who has submitted the highest price participating in the bidding and the photovoltaic prosumer 10, and the automatic matching unit 320 provides the electric consumer 30 with purchase conditions. After receiving the input, after searching for bids with sales conditions that meet the conditions, if there is a bid that meets the conditions, an automatic contract is concluded, and if there is no bid that meets the conditions, the electric consumer 30 is requested to re-enter the purchase conditions, The re-purchase condition input request may include a purchase condition capable of winning a bid.

In addition, the contract connection unit 200 includes a database 220 that analyzes the input bid document and extracts and stores information on sales price, sales power amount, supply time and purchase price, purchase power amount, and desired power supply time information, and stores the information. When the contract is not normally fulfilled, the settlement unit 510 returns the contract deposit to the electricity consumer 30, and the prosumer settlement unit 520 is responsible for the prosumer 10 to determine if the contract is not normally fulfilled. In this case, the penalty as a deposit received in advance from the photovoltaic power generation prosumer 10 or the penalty charged to the photovoltaic power generation prosumer 10 may be paid to the electricity consumer 30 .

A transaction method of a blockchain-based electricity trading system according to an embodiment of the present invention includes receiving a first transaction block chain in which an amount of surplus power calculated in a member-subscribed photovoltaic prosumer 10 is recorded; generating a bid list block chain having a plurality of transaction block chains including the first transaction block chain as block bodies; Receiving a bid for any one transaction block chain among a plurality of transaction block chains of the bidding list block chain or receiving a purchase condition from a member-registered electric consumer (30); In case of receiving a bid from the electricity consumer 30, processing a bid with the highest bid based on a bidding price of a bidder and recording it in a corresponding second transaction block chain for a bid case in which the bidding is completed for each time slot every day; After the contract is completed, the electric consumer 30 receives a consumer contract deposit, which is a deposit for payment, and records it in the second transaction block chain; and processing a contract between the photovoltaic power generation prosumer 10 and the electricity consumer 30 when the successful bidding process is completed, and recording each transaction in the second transaction block chain. can

In addition, when the purchase condition is provided from the electricity consumer 30, recording the contract conclusion with the electricity consumer 30 in a third transaction blockchain matching the purchase condition among the plurality of transaction blockchains. may further include.

Through the promotion of the Green New Deal at the national level, it is possible to activate a two-way electricity trading market in which surplus electricity generated while operating an increasing number of solar power generation systems can be directly traded between individuals, and through blockchain-based electricity trading, transparent and stable can make a deal

1 is a block diagram of a two-way power trading system between a prosumer and a consumer of solar power generation according to an embodiment of the present invention;
2 is a block diagram of a block chain-based power trading system according to;
3 is a block diagram of a two-way power trading system according to the present invention;
4 is a block diagram of the automatic matching unit of FIG. 3;
5 is a block diagram of a surplus power predictor of FIG. 4;
6 is a block diagram of a blockchain;
7 is a signal flow diagram of a blockchain-based power trading method, and
8 is a block chain configuration diagram.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items. 'Or' can be interpreted as a logical exclusive sum in context, but generally means the same as 'and/or', that is, a logical sum unless there is a direct description of 'otherwise' or 'logical exclusive sum'. do.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle. In addition, that the first component and the second component on the network are connected or connected means that data can be exchanged between the first component and the second component in a wired or wireless manner.

In addition, the suffixes "module" and "unit" for the components used in the following description are simply given in consideration of ease of preparation of this specification, and do not themselves give a particularly important meaning or role. Accordingly, the “module” and “unit” may be used interchangeably.

When these components are implemented in actual applications, two or more components may be combined into one component, or one component may be subdivided into two or more components as needed. The same reference numerals have been assigned to the same or similar components throughout the drawings, and detailed descriptions of components having the same reference numerals may be omitted as they are replaced with descriptions of the components described above.

Furthermore, the present invention covers all possible combinations of the embodiments shown herein. The various embodiments of the present invention are different but not mutually exclusive. One embodiment of the particular shape, structure, function, and characteristic described herein may be implemented in another embodiment. For example, components mentioned in the first and second embodiments may perform all functions of the first and second embodiments.

1 is a block diagram of a two-way power trading system between a prosumer and a consumer of photovoltaic power generation according to an embodiment of the present invention. 2 is a block diagram of a block chain-based power trading system according to the power trading system of FIG. 1 is expanded. 3 is a block diagram of a two-way power trading system according to the present invention, FIG. 4 is a block diagram of an automatic matching unit of FIG. 3 , and FIG. 5 is a block diagram of a surplus power predictor of FIG. 4 . 6 is a block diagram of a blockchain. 7 is a signal flow diagram of a blockchain-based power trading method. 8 is a block chain configuration diagram.

Referring to FIG. 1 , the two-way power trading system may include a photovoltaic power generation prosumer 10, a two-way power trading server 20, and an electricity consumer 30.

The photovoltaic power generation prosumer 10 may include a power generation facility composed of a solar cell panel, an inverter, a battery (ESS), and various control devices, various sensors such as temperature and humidity, and S/W for prosumers. The photovoltaic prosumer 10 is not limited thereto, and may be or include various distributed power prosumers and facilities.

S/W for prosumers can be driven through a mobile terminal such as a computer or smart phone.

The photovoltaic power generation prosumer 10 may submit a bid for power sale to the interactive power trading server 20 through an app or the web. This bidding document may include sales conditions including the price, power amount, and supply time of the photovoltaic prosumer 10 . The sales condition is not limited to price, power amount, and supply time, and may include various conditions.

The two-way power transaction server 20 may receive and store the power sales bid submitted by the photovoltaic power generation prosumer 10 , and provide a list of power sales bids to the electricity consumer 30 .

The electric consumer 30 may participate in a bidding by selecting a specific bid in which a transaction is desired from among a list of offered sales bids. The two-way power transaction server 20 may make a final successful bid to the electric consumer 30 who applied for the highest price among bidding applications of the electricity consumer 30, and conclude a contract. These functions may be implemented through S/W for electric consumers. S/W for electricity consumers can be driven through a mobile terminal such as a computer or smart phone.

The two-way power transaction server 20 manages and monitors successful bid contracts and can supply electricity stored in the battery of the photovoltaic power generation prosumer 10 to the electricity consumer 30 according to the power supply time. The two-way power transaction server 20 may control the battery of the photovoltaic power generation prosumer 10 to discharge power and supply the discharged power to a specific electricity consumer 30 .

Referring to FIG. 2 , the blockchain-based power trading system may include a two-way power trading server 20 and a plurality of nodes N1 to N7.

The plurality of nodes N1 to N7 may be any one of the photovoltaic power generation prosumer 10 and the electricity consumer 30 . In this specification, the photovoltaic prosumer 10 and the electricity consumer 30 are separately written, but it is obvious that the photovoltaic prosumer 10 can be the electricity consumer 30. Hereinafter, when indicating both or either one, it is expressed as a node.

The blockchain-based power trading system may further include a power grid (P/NW).

The power grid may perform power generation or/and power distribution. The power grid may include a legacy power grid in which electric companies unilaterally supply electricity to each household, and/or an intelligent power grid (smart grid) in which electric companies and consumers can exchange information in real time by adding a communication function to the existing power grid. have.

The plurality of nodes N1 to N7 may communicate with each other through the communication network C/NW. The bidirectional power trading server 20 may communicate with a plurality of nodes N1 to N7 through a communication network. The communication network (C/NW) may be wired/wireless. The communication network (C/NW) may use a power network protocol. In this case, the power grid (P/NW) and the communication network (C/NW) can be merged.

The plurality of nodes N1 to N7 may implement block chain technology through the communication network C/NW. Power transactions such as power purchase and power sale between the two-way power transaction server 20 and the plurality of nodes N1 to N7 can be performed through blockchain-based technology.

Referring to FIG. 3 , the two-way power transaction server 20 may include a contract connection unit 200, a transaction matching unit 300, a transaction fulfillment unit 400, and a fee settlement unit 500.

The blockchain unit 100 generates a block chain in which power demand information, power generation information, power unit price information, and power transaction information between nodes of a plurality of nodes N1 to N7 are recorded, and the block chain It can be provided to a plurality of nodes N1 to N7. A block chain is a chain that encrypts and records blocks, and a block means a record that increases every time it is recorded when creating a distributed ledger.

When blocks are distributed and stored, data movement and changes can be tracked and managed. In addition, it is possible to expand the safety net and trust for each power plant by managing data that requires enormous amounts of security and developing it in the form of distributed data so that it cannot be manipulated.

The block chain unit 100 may convert the power transaction information into a blockchain protocol so that the power transaction information and the like are distributed and stored in the plurality of nodes N1 to N7.

For use as a distributed ledger, a blockchain is preferably managed by a peer-to-peer (P2P) network that conforms to protocols for communication between nodes and validates new blocks.

Once a block is written, the data in a given block cannot be changed retroactively without changing all subsequent blocks (next blocks that are chained), requiring consensus from multiple nodes, making hacking difficult and fraud less likely. By connecting blocks in a distributed ledger and consensus method, the management and tracking of data generated by the security guide device can be managed transparently.

The functions of the blockchain unit 100 may be implemented in each of the plurality of nodes N1 to N7.

Referring to FIG. 6 , a blockchain may include a plurality of blocks. A block may have a header and a body.

The block header may include a previous block hash value, a block hash (current block hash value), a next block hash value, a nonce, and a merkle hash value of a merkle tree root.

The body of the block may include power transaction information. The block body may include power capacity information, power generation information, and power unit price information separately from power transaction information. Each element can be properly arranged with transaction information and other information of the existing block chain.

The Merkle hash value may be a hash value corresponding to the root of the binary Merkle tree or a general hash value obtained by passing the power transaction details through a hash function. For security, it is desirable to ensure that the power transaction content is properly configured as a binary Merkle tree.

The block hash serves as an identifier of the block, and inputs to the block hash generation function may include a previous block hash value, a nonce, and a merkle hash value. Inputs to the block hash generation function may further include a software version included in the block header, block generation time, mining difficulty, and the like.

The previous block hash value may refer to the block hash of the previous block (block #1) linked to the linked list of the corresponding block (block #2). The genesis block (block #1) does not have the hash value of the previous block. Linked blocks form a chain, and if the previous block is changed, the block after the link must go through a complex process of modification together, so hacking or forgery can be prevented.

The next block hash value means the block hash of the next block (block #3 (not shown)) additionally connected to the corresponding block (block #2). The next block hash value is not directly used as an input value of the hash function, but it is possible to form a double linked list structure instead of a single linked list.

The nonce may mean a value (counter) such that a hash output value calculated by using this nonce value as one of the input values satisfies a specific condition.

Information of the block body may be registered or updated by the bidirectional power trading server 20 and/or the plurality of nodes N1 to N7.

The photovoltaic power generation prosumer 10 can register sales conditions including price, amount of electricity, and supply time in a block chain (hereinafter referred to as 'transaction block chain'). The sales condition is not limited to price, power amount, and supply time, and may include various conditions. The photovoltaic power generation prosumer 10 may register power generation and power consumption instead of power amount. In this case, the amount of power may mean a difference between production and consumption. The transaction block chain in which these sales conditions are registered can function as a kind of bidding document.

The blockchain unit 100 of the interactive power trading server 20 may generate a bid list from transaction blockchains generated as sales conditions. The block chain unit 100 may create a block chain for the bid list and provide (spread) the block chain to the plurality of nodes N1 to N7 through a communication network.

The electricity consumer 30 can participate in the bidding by transmitting purchase conditions to the bidirectional power transaction server 20 or by selecting a specific bid desired for a transaction from among the list of the provided bid list block chain body. When participating in the bidding, the two-way power transaction server 20 allows the electric consumer 30, who has applied for the highest price, to make a final bid, and concludes a contract. The bidding list block chain can be updated by recording participation in bidding and winning bids in the block body. As a result, bidding and successful bidding can proceed transparently.

The two-way power transaction server 20 manages and monitors successful bid contracts and can supply electricity stored in the battery of the photovoltaic power generation prosumer 10 to the electricity consumer 30 according to the power supply time. The two-way power transaction server 20 may control the battery of the photovoltaic power generation prosumer 10 to discharge power and supply the discharged power to a specific electricity consumer 30 . These power supplies and the like can be recorded on the transaction blockchain.

The contract connection unit 200 may communicate with the photovoltaic prosumer 10 . The contract connection unit 200 may communicate with the electricity consumer 20 .

The contract connection unit 200 may include a user interface unit 210 and a database 220 .

The user interface unit 210 may receive sales condition and/or purchase condition information of the photovoltaic prosumer 10 and/or electricity consumer 20 . The user interface unit 210 may receive and provide sales conditions and purchase conditions in the form of a bid document.

In this embodiment, the user interface unit 210 does not directly receive sales conditions from the photovoltaic prosumer 10, but may collect the distributed transaction blockchain.

The database unit 220 may store data received from the user interface unit 210 .

The database unit 220 analyzes the input bid or transaction block chain to extract and store information on sales price, sales power amount, supply time and purchase price, purchase amount of power, and desired power supply time. The storage information is not limited to the above information and may include various types of information.

The database 220 may create or update a bid list block chain in which bid lists are stored from the transaction block chain. Transaction blockchains may be linked to bid list blockchains, or may constitute the block body of a bid list blockchain. These functions may be implemented in the blockchain unit 100.

The transaction matching unit 300 may search for sale conditions and purchase conditions stored in the database 220 of the contract connection unit 200 and match the highest price condition among conditions that meet the conditions. Bid List Blockchain

Matching can be manual or automatic. To this end, the transaction matching unit 300 may include a manual matching unit 310 and an automatic matching unit 320 .

The manual matching unit 310 may provide the electric consumer 30 with a bidding list block chain, and the electric consumer 30 may participate in the bidding by selecting one bid from the bidding list. When the bidding time ends, the manual matching unit 310 may conclude a contract between the electricity consumer 30 who submitted the highest price among the electricity consumers 30 participating in the bidding and the photovoltaic prosumer 10 .

The automatic matching unit 320 may enter into an automatic contract after receiving purchase conditions from the electric consumer 30, searching for a bid document with sales conditions that meet the conditions, and if there is a bid that satisfies the conditions. If there is no bid document that satisfies the conditions, the consumer 30 may request to input purchase conditions again. At this time, the automatic matching unit 320 may present purchase conditions that can be won to the electric consumer 30 .

Referring to FIG. 3 , the automatic matching unit 320 may include a surplus power amount predicting unit 330, a demand power amount predicting unit 340, and a matching unit 350.

The surplus power amount prediction unit 330 collects photovoltaic power generation data, solar panel temperature data, and weather data from each of the photovoltaic power generation prosumers 10, analyzes the relationship between these data, and determines the future solar power generation amount. Predictable. Data for analysis is not limited to temperature and weather and may include various data. In addition, the surplus power amount predictor 330 may predict future power consumption by collecting and analyzing the electricity consumption of the photovoltaic power generation prosumer 10 from the electric meter at the same time as the photovoltaic power generation data. The surplus power amount prediction unit 330 may predict the future surplus power amount through the estimated solar power generation amount and power consumption amount. The surplus amount of power may refer to the amount of power to be charged in the battery of the photovoltaic prosumer 10 .

Referring to FIG. 4 , the surplus power amount predictor 330 may include a photovoltaic generation amount predictor 331 , a demand predictor 332 , and a battery charge amount predictor 333 . The battery charging amount prediction unit 333 may include an electric energy storage device such as an ESS as well as a battery.

The power demand prediction unit 340 may collect power consumption information from the electric meter of the electricity consumer 30 and, at the same time, weather information, and predict future electricity consumption according to the weather forecast.

The matching unit 350 may match the seller and the buyer using the surplus power of the photovoltaic prosumer 10 predicted by the power demand prediction unit 340 and the power demand of the electricity consumer. The matching unit 350 may match a seller and a buyer in consideration of various conditions such as time and location as well as amount of power.

The transaction fulfillment unit 400 may include a schedule and execution unit 410 and a device control unit 420 .

The schedule and execution unit 410 manages the electricity supply time schedule of transaction block chains concluded in the transaction matching unit 300, and when the supply time arrives, electricity of the photovoltaic power generation prosumer 10 is supplied to the electricity consumer 30. You can issue a command that causes it to redistribute.

The device control unit 420 receives the execution command and transmits a control command to the electricity storage device of the photovoltaic power generation prosumer 10 to discharge electricity, and supplies electricity to the home of the purchased electricity consumer 30 through switch control. A series of devices can be controlled so that is supplied.

The rate settlement unit 500 may include a consumer settlement unit 510 and a prosumer settlement unit 520 .

The consumer settlement unit 510 may receive a full or partial purchase price as a contract deposit in advance to conclude a contract after the electric consumer 30 has won a successful bid for power transaction. In addition, when the final contract is not normally fulfilled, the contract deposit may be returned to the electricity consumer 30 .

When the contract is normally completed and terminated, the prosumer settlement unit 520 may pay the prosumer the contract deposit received in advance from the electricity consumer 30 as the purchase price. In addition, if the contract is paid in advance from the photovoltaic prosumer 10 or the contract is not fulfilled under the responsibility of the prosumer 10, the penalty may be claimed, collected, and paid to the electricity consumer 30.

Referring to FIGS. 7 and 8 , the photovoltaic prosumer 10 may sign up as a member through the prosumer S/W (S610). The electricity consumer 30 may register as a member through S/W for electricity consumers (S710). It is preferable that the photovoltaic power generation prosumer 10 and the electricity consumer 20 have completed construction of a photovoltaic power generation facility and a two-way power trading facility in the house before each membership registration.

The two-way power transaction server 20 may collect power transaction information through two-way communication with the photovoltaic power generation prosumers 10 and electricity consumers 30 who are registered as members.

The power transaction information may include the amount of power generation and electricity consumption of the photovoltaic power generation prosumer 10 and the amount of electricity consumption of the electricity consumer 20 . The power transaction information is not limited thereto and may include various types of information.

The photovoltaic power generation prosumer 10 may calculate the amount of surplus power to be provided to the interactive power trading server 20 (S620). The electricity consumer 30 may calculate the amount of electricity demand to be provided to the interactive power transaction server 20 (S720).

It is preferable that the step of calculating the surplus power amount of the photovoltaic power generation prosumer 10 (S620) and the step of calculating the power demand amount of the electricity consumer 30 (S720) are always repeatedly performed regardless of whether there is a bidding or power transaction.

In order to sell their surplus power, the solar power generation prosumer 10 creates a transaction block chain (transaction B/C) and spreads it to the communication network, or submits it to the two-way power transaction server 20 (S630). .

The two-way power transaction server 20 can generate a bid list block chain (B/C) from the provided transaction block chains and convince the communication network (S810).

The electricity consumer 30 checks the electricity demand calculation result (S720), searches the bidding list block chain (S730), selects a seller suitable for the required electricity demand (S720) and the target price, and participates in the bidding (S740) can do.

The two-way power transaction server 20 may process a successful bid in the highest bid method based on the bidding price of the bidding participant for the bid case in which the bidding is completed for each time slot every day (S820).

When the successful bidding process is completed, the two-way power transaction server 20 may record the contract between the prosumer 10 and the electricity consumer 30 in the corresponding transaction block chain (S830).

After the contract is completed, the two-way power transaction server 20 may receive a consumer contract deposit, which is a deposit for payment by the electricity consumer 30 (S840).

The photovoltaic power generation prosumer 10 may perform a transaction (power supply) of supplying electricity to an electricity consumer at a contracted electricity supply time (S850).

The two-way power transaction server 20 may determine whether the transaction fulfillment is normally terminated (S860). The two-way power transaction server 20 may record the transaction execution start/end time, the amount of electricity transacted, and whether or not the transaction was normal in the transaction block chain.

If the transaction fulfillment is normally completed, the two-way power transaction server 20 may pay the transaction price to the prosumer 10 (S870).

When the transaction fulfillment is abnormally terminated, the interactive power transaction server 20 may return the deposit to the electricity consumer (S880).

The present invention may be implemented in hardware or software. In implementation, the present invention can also be implemented as computer readable codes on a computer readable recording medium. That is, it may be implemented in the form of a recording medium including instructions executable by a computer. Computer readable media includes all types of media in which data that can be read by a computer system is stored. Computer readable media may include computer storage media and communication storage media. Computer storage media includes all storable media implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules, and other data, and includes volatile/nonvolatile/hybrid memory. It is not limited to whether or not, separable/non-separable. Communication storage media includes modulated data signals or transport mechanisms such as carrier waves, any information delivery media, and the like. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers in the art to which the present invention belongs.

In addition, although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications are possible by those skilled in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

10: Solar power generation prosumer 20: Two-way power trading server
30: electricity consumer 100: blockchain department
200: contract connection unit 300: transaction matching unit
400: transaction fulfillment unit 500: fee settlement unit

Claims (5)

A contract connection unit that communicates with the solar power generation prosumer and electricity consumers and receives a transaction block chain in which sales conditions are recorded from the solar power generation prosumer;
A block chain unit generating a list block chain from the transaction block chain;
a transaction matching unit for retrieving the sale conditions stored in the list block chain and the purchase conditions of the electricity consumer, matching the highest price condition among the conditions meeting the conditions, and recording them as a contract in the transaction block chain;
A schedule and execution unit that manages the electricity supply time schedule according to the contract of the transaction block chain and executes a command to distribute the electricity of the photovoltaic prosumer to the electricity consumer when the supply time arrives, and receives the execution command and transmits a control command to the electricity storage device of the photovoltaic power generation prosumer to discharge electricity, and controls supply of electricity to the house of the purchased electricity consumer through switch control to fulfill the transaction. Equipped with a device control unit transaction fulfillment department; and
A consumer settlement unit that receives prepayment as a contract deposit for the conclusion of a contract after the electricity consumer has won a successful bid for electricity transaction, and a prosumer settlement that pays the contract deposit to the photovoltaic prosumer as purchase price when the contract is normally completed and terminated A rate settlement unit having a department; include,
The blockchain unit records and updates whether the transaction is normally fulfilled, the execution time, the end time of the transaction, and the amount of electricity traded in the transaction block chain. According to claim 1,
The transaction matching unit includes a manual matching unit and an automatic matching unit,
The manual matching unit provides the electric consumer with a bidding list, and when the bidding time ends, concludes a contract between the electric consumer who submitted the highest price participating in the bidding and the photovoltaic power generation prosumer;
The automatic matching unit receives purchase conditions from the electric consumer, searches for bids with sales conditions that meet the conditions, automatically concludes a contract if there is a bid that satisfies the conditions, and if there is no bid that satisfies the conditions, the electric consumer returns again. ask you to enter purchase conditions;
The two-way power trading server, wherein the re-purchase condition input request includes a purchase condition capable of winning a bid. According to claim 1,
The contract connection unit analyzes the input bid document and has a database for extracting and storing sales price, sales power amount, supply time and purchase price, purchase power amount, and desired power supply time information,
The consumer settlement unit returns the contract deposit to the electricity consumer when the contract is not normally performed;
The prosumer settlement unit is the responsibility of the prosumer, and when the contract is not normally performed, a two-way power transaction server that pays the penalty as a deposit received in advance from the photovoltaic prosumer or the penalty charged to the photovoltaic prosumer to the electricity consumer. . Receiving a first transaction block chain in which the amount of surplus power calculated by a member-registered photovoltaic prosumer is recorded;
generating a bid list block chain having a plurality of transaction block chains including the first transaction block chain as block bodies;
Receiving a bid for any one transaction block chain among a plurality of transaction block chains of the bidding list block chain or receiving a purchase condition from an electric consumer who has registered as a member;
In case of receiving a bid from the electric consumer, processing a bid with the highest bid based on a bidding price of a bidder and recording it in a corresponding second transaction block chain for a bid case in which the bidding is completed for each time slot every day;
After completing the contract, the electrical consumer receives a consumer contract deposit, which is a deposit for payment, and records it in the second transaction block chain; and
When the successful bidding process is completed, processing the contract between the photovoltaic power generation prosumer and the electricity consumer, and recording each transaction in the second transaction block chain; based power trading method. According to claim 4,
When the purchase condition is provided from the electric consumer, the step of recording the contract conclusion with the electric consumer in a third transaction block chain matching the purchase condition among the plurality of transaction block chains, blockchain-based power trading method.

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