CN114066530A - Block chain-based distributed transaction method capable of predicting electric energy among micro grids - Google Patents

Block chain-based distributed transaction method capable of predicting electric energy among micro grids Download PDF

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CN114066530A
CN114066530A CN202111425080.1A CN202111425080A CN114066530A CN 114066530 A CN114066530 A CN 114066530A CN 202111425080 A CN202111425080 A CN 202111425080A CN 114066530 A CN114066530 A CN 114066530A
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producer
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龚钢军
袁琳琳
杨佳轩
强仁
陆俊
武昕
苏畅
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North China Electric Power University
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Abstract

The invention discloses a distributed transaction method for predictable electric energy among micro grids based on a block chain, which comprises the following steps: predicting the sold electric quantity of a producer and a consumer in a block chain-based microgrid, and generating an electric quantity ownership certificate based on the predicted sold electric quantity; and the producer and the consumer carry out broadcast auction on the auction information of the product to be auctioned, so that the consumer and the producer and the consumer can carry out matching and trading. According to the invention, by means of a block chain technology, distributed transaction of electric energy among micro grids is realized, the near consumption of the electric energy of the clean energy power plant is efficiently promoted, the energy utilization efficiency is improved, in the transaction process, two transaction parties communicate anonymously through corresponding information flow addresses, the occurrence of malicious transaction can be avoided, and meanwhile, the transaction efficiency is improved.

Description

Block chain-based distributed transaction method capable of predicting electric energy among micro grids
Technical Field
The invention belongs to the field of microgrid electric energy transaction, and particularly relates to a distributed transaction method capable of predicting electric energy among microgrids based on a block chain.
Background
At present, China is in a stage of preferentially developing local distributed and distributed renewable energy resources, vigorously promoting direct and nearby utilization of distributed renewable power, heat, fuel gas and the like at a user side, and improving the proportion of renewable energy in regional energy supply by combining new technologies such as energy storage and hydrogen energy.
The prior art for implementing the above description includes: according to the relation between different market mechanisms and consumer bidding strategies in the microgrid electric energy market, evaluating the market mechanisms under the zero intelligence and intelligent bidding strategies; evaluating a block chain technology as an information system of the microgrid energy trading market and a block chain microgrid case of the new york Bruklin on the basis of basic components required for implementing the microgrid energy trading market; using a distributed security verification algorithm and a weak centralized management method to carry out electric energy transaction;
therefore, the defects still exist in the prior art, for example, the method still depends on a third-party trust authority, true decentralization is not completed, in a centralized power transaction mode, mutual trust of market bodies is insufficient, data safety is poor, and in addition, the characteristics of uncertainty and time-sharing transaction of renewable energy power generation exist, so that a method capable of ensuring high transparency, traceability and tamper resistance in electric energy distributed transaction is urgently needed.
Disclosure of Invention
The invention aims to provide a distributed transaction method for predictable electric energy among micro grids based on a block chain, so as to solve the problems in the prior art.
In one aspect, to achieve the above object, the present invention provides a distributed transaction method for predictable electrical energy among micro grids based on block chains, including:
predicting the sold electric quantity of a producer and a consumer in a block chain-based microgrid, and generating an electric quantity ownership certificate based on the predicted sold electric quantity;
and the producer and the consumer carry out broadcast auction on the auction information of the product to be auctioned, so that the consumer and the producer and the consumer can carry out matching and trading.
Optionally, before predicting the amount of electricity sold by the parity producer, the method further comprises:
in block chain based micro-grids, all users register an anonymous address for sending messages based on public and private keys.
Optionally, the predicting the salable electric quantity of the producer and the consumer in the microgrid based on the block chain, and the generating of the electric quantity ownership certificate based on the predicted salable electric quantity includes:
predicting a predicted amount of producible electricity and a predicted amount of used electricity of the producer, the predicted amount of sellable electricity being obtained based on a difference between the predicted amount of producible electricity and the predicted amount of used electricity;
obtaining a proof of ownership of the amount of power based on the projected amount of saleable power;
sending the power ownership certificate to the destroyer through an anonymous address of the destroyer.
Optionally, the process of obtaining the power ownership certificate based on the expected salable power includes:
obtaining power ownership b based on equation (1) and the projected amount of saleable powerα：
bαSHA256 (public key of the prosumer + E + timestamp) (1)
Where E represents the expected amount of saleable power and SHA256 is a hashing algorithm.
Optionally, the broadcast auction of the auction information of the product to be auctioned is performed by the producer and the consumer, so that the process of matching and trading between the consumer and the producer includes:
the producer and the consumer broadcast the auction information to the whole network through the anonymous address;
the customer selects and matches the auction information issued by a plurality of producers and consumers in the micro-grid based on the demand of the customer;
after the matching is successful, the consumer verifies the electricity ownership proof of the producer and the consumer;
and after the verification is qualified, performing transaction and broadcasting the whole network.
Optionally, the auction information includes: the amount of electricity available for sale, the reserve price and the anonymous address of the producer or consumer are expected.
Optionally, after the matching is successful, the process of verifying the electricity ownership certificate of the producer and the consumer includes:
the consumer sends a message containing the power ownership certificate to a database for verification through the anonymous address;
and checking the electric quantity ownership certificate based on the database, and verifying authenticity.
Optionally, the process of performing a transaction and broadcasting the whole network after the verification is qualified includes:
in the transaction process, the block chain cancels the electricity quantity ownership certificate of the producer and the consumer;
after logout, transferring the electric quantity ownership certificate to the name of the consumer who carries out transaction through the formula (1), and broadcasting the transaction result to the whole network;
and packaging all transaction details into blocks, storing the blocks into a block chain, and ending the transaction.
The invention has the technical effects that:
the invention provides a distributed transaction method for predictable electric energy among micro grids based on a block chain, which realizes the distributed transaction of the electric energy among the micro grids by means of the block chain technology, efficiently promotes the near consumption of the electric energy of a clean energy power plant, and improves the utilization efficiency of energy;
before the transaction, the system can scientifically predict the saleable electric quantity generated by the producer and the consumer in a certain time period t according to the related data, and is helpful for providing a selection space for both parties of the transaction;
the two parties of the transaction communicate anonymously through the corresponding information flow addresses, so that malicious transactions can be avoided, and the transaction efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 is a block diagram of an embodiment of a microgrid power transaction;
FIG. 2 is a diagram of a transaction module distribution in an embodiment of the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
As shown in fig. 1, in the embodiment, a distributed transaction method for predictable electric energy among micro grids based on a block chain is provided, and the electric energy transaction mainly includes the following two steps:
1) a distributed electric energy transaction method;
2) an electric energy trading auction algorithm.
To prevent the situation that the token is paid for multiple times to determine the ownership of the electric energy, the microgrid electric energy transaction system predicts the electric energy generated by each time period of the node user before the electric energy is generated, and simultaneously determines a unique abstract B for the electric energy E generated by the producer and the consumer B in a certain time periodα(representing proof of ownership of the electricity E by the parity producer B), sending it to the corresponding parity producer B, and recording it in the blockchain database, where BαThe generation formula (1) is:
bαSHA256 (public key of user B + E + timestamp) (1)
The public key of the user B is the public key of the producer and the consumer, and the SHA256 is a hash algorithm.
The method comprises the following steps: distributed electric energy transaction method
Suppose user a purchases power for a consumer and user B sells power for a producer or consumer. The specific transaction module is shown in fig. 2.
Firstly, energy source prediction is carried out: to protect privacy from malicious transactions, all node users create an address MAddr for sending messages using the corresponding public and private keys. Before the auction begins, the system can automatically predict the saleable electric quantity E of all the producers and consumers, taking the producer and the consumer B as an example, the saleable electric quantity B is equal to the predicted saleable electric quantity minus the predicted used electric quantity, and the system automatically generates a unique abstract B of the electric quantity E corresponding to the producer and the consumer BαAnd recorded in the database, the system transmits the message B to the address MAddr B of BαSo that B has proof of ownership of the amount of saleable power E.
Secondly, transaction matching is carried out: b uses MADdr B to broadcast auction information to the whole network, and the broadcast function is as follows: BROADCAST (E, P, MAddr B) contains the available energy E, the reserve price P and the anonymous message flow address MAddr B. And the user A participates in the auction of the electric energy B according to the own requirement, the electric energy auction is completed according to a system matching method (detailed in the step two), if the user A and the user B are successfully matched, the user A sends a message to the system through an address MADdr A according to a transaction program, the ownership of the electric quantity E owned by the user B is verified, and the system checks the record of the database and feeds back the result to the user A. If true, the system will broadcast the auction result to the whole network; if the result is false, the matching information of the user A and the user B is invalid.
Finally, power ownership is changed: after the transaction is completed on the block chain, the system cancels the ownership certificate of the electric energy E owned by the B, and simultaneously transfers the electric energy ownership to the user A through the formula (1) to obtainbβThe entire transaction details are packaged into blocks for storage into a block chain.
Step two: electric energy auction algorithm
N is the set of the producers and consumers, and M is the set of the consumers. Assuming that the time of day is evenly divided into T time segments, the set of time segments within a day is denoted as T. Here, the producer N (N ∈ N) can know by the system that the amount of electric power that can be produced per time slot is itself, respectively, as
Figure BDA0003377984440000061
(here, mainly clean energy power generation is taken as main power generation, such as natural gas, photovoltaic, wind power and the like). Meanwhile, the producer n can also obtain the electric quantity consumed by the power generation of the producer n in the next time period
Figure BDA0003377984440000062
Therefore, the amount of electricity to be auctioned by the n producers and consumers in the time period is known as
Figure BDA0003377984440000063
General conditions
Figure BDA0003377984440000064
If it occurs
Figure BDA0003377984440000065
The time is that the user needs to participate in the auction and buy the lacking electricity. Thereafter, the producer and consumer submit the sold electricity to the blockchain
Figure BDA0003377984440000066
Reserve price
Figure BDA0003377984440000067
Reserve prices are the lowest bargain price and corresponding flow address specified by the producer or consumer, i.e. (,)
Figure BDA0003377984440000068
MAddr n)。
If the consumer wants to use the electricity in the time period t +1, the auction must be performed in the time period tBefore finishing, an auction request is made to the blockchain. The blockchain then sends the collected information about the buyers and the sellers waiting for auction in the time period t to the consumers, including the amount of electricity waiting for auction
Figure BDA0003377984440000069
Reserve the electricity price for each person of birth and consumption
Figure BDA00033779844400000610
And the message flow address MAddr n of the producer or consumer, etc.
According to the information sent by the block chain, a consumer M (M belongs to M) carries out auction on the user n according to own will, namely, the demand of the consumer M is according to (M ∈ M)
Figure BDA00033779844400000611
MAddr m) to block chains, where
Figure BDA00033779844400000612
In order to bid the amount of electricity for the producer n,
Figure BDA00033779844400000613
to purchase the highest price these charges are willing to pay, MAddr m is the consumer message flow address information.
Let B be an auction set, WnIs the set of consumers for which each of the parity is successful, here:
Figure BDA0003377984440000071
note the book
Figure BDA0003377984440000072
B is obtained after the auction sequence of the consumers is sequencedd＝{bd1,bd2,bd3,...,bdxThen on set BdAnd performing sequential traversal. If the electricity quantity is auction
Figure BDA0003377984440000073
And satisfy
Figure BDA0003377984440000074
The auction is successful, bdxIs counted into WnIn (1). Reminding consumers m to cancel t time period set B at the same timedAnd other unnecessary orders are avoided, and repeated auction is avoided. If the auction is found to be over, the auction electric quantity of the n abortive person is found
Figure BDA0003377984440000075
If not, B is removeddOf current BdxThe bid information is invalidated.
The invention provides a distributed transaction method for predictable electric energy among micro grids based on a block chain, which realizes the distributed transaction of the electric energy among the micro grids by means of the block chain technology, efficiently promotes the near consumption of the electric energy of a clean energy power plant, and improves the utilization efficiency of energy; before the transaction, the system can scientifically predict the saleable electric quantity generated by the producer and the consumer in a certain time period t according to the related data, and is helpful for providing a selection space for both parties of the transaction; the two parties of the transaction communicate anonymously through the corresponding information flow address MADdr, so that the occurrence of malicious transaction can be avoided, and the transaction efficiency is improved.
The method for scientifically predicting the saleable electricity generated by the producer and the consumer in a certain time t by the system according to the relevant data comprises the following steps: the past power generation data of the clean energy power plant is arranged and a related mathematical model is established, under the condition that the installation mode of components, the operation stability of equipment and the power attenuation of the components are not changed, taking a photovoltaic power plant as an example, the power generation amount of the next time period is basically determined by the radiation intensity and the spectral characteristic of the sun, and the power generation amount of the corresponding wind power plant in the next time period is basically determined by the air flow rate and the windward area.
The invention provides a distributed transaction method for predictable electric energy among micro grids based on a block chain, which realizes the distributed transaction of the electric energy among the micro grids by means of the block chain technology, efficiently promotes the near consumption of the electric energy of a clean energy power plant, and improves the utilization efficiency of energy;
before the transaction, the system can scientifically predict the saleable electric quantity generated by the producer and the consumer in a certain time period t according to the related data, and is helpful for providing a selection space for both parties of the transaction;
the two parties of the transaction communicate anonymously through the corresponding information flow addresses, so that malicious transactions can be avoided, and the transaction efficiency is improved;
the single-point connection is promoted, the impact on a large power grid is reduced, the electric energy exchange between the micro power grid and the power grid system is realized through the connection of the micro power grid and a public connection point of the power grid, and the direct access of a plurality of distributed power supplies to the power grid system is avoided;
due to the characteristics of uncertainty and time-sharing transaction of renewable energy power generation, the invention develops an end-to-end power transaction mode adaptive to renewable energy power generation, gives the autonomous control capability of the end-to-end power transaction mode with users, agents and power stations as terminals, and can participate in market competition as multiple subjects.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (8)

1. A distributed transaction method for predictable electric energy among micro grids based on block chains is characterized by comprising the following steps:
predicting the sold electric quantity of a producer and a consumer in a block chain-based microgrid, and generating an electric quantity ownership certificate based on the predicted sold electric quantity;
and the producer and the consumer carry out broadcast auction on the auction information of the product to be auctioned, so that the consumer and the producer and the consumer can carry out matching and trading.
2. The method of claim 1, wherein prior to predicting the amount of electricity sold by the parity producer, the method further comprises:
in block chain based micro-grids, all users register an anonymous address for sending messages based on public and private keys.
3. The method of claim 2, wherein predicting the amount of saleable power of a producer in the microgrid based on a blockchain, and generating a proof of ownership of the amount of power based on the predicted amount of saleable power comprises:
predicting a predicted amount of producible electricity and a predicted amount of used electricity of the producer, the predicted amount of sellable electricity being obtained based on a difference between the predicted amount of producible electricity and the predicted amount of used electricity;
obtaining a proof of ownership of the amount of power based on the projected amount of saleable power;
sending the power ownership certificate to the destroyer through an anonymous address of the destroyer.
4. The method of claim 3, wherein obtaining the proof of charge ownership based on the projected amount of saleable power comprises:
obtaining power ownership b based on equation (1) and the projected amount of saleable powerα：
bαSHA256 (public key of the prosumer + E + timestamp) (1)
Where E represents the expected amount of saleable power and SHA256 is a hashing algorithm.
5. The method of claim 2, wherein the step of the producer conducting a broadcast auction on the auction information of the product to be auctioned, and the step of the consumer and the producer matching and trading comprises:
the producer and the consumer broadcast the auction information to the whole network through the anonymous address;
the customer selects and matches the auction information issued by a plurality of producers and consumers in the micro-grid based on the demand of the customer;
after the matching is successful, the consumer verifies the electricity ownership proof of the producer and the consumer;
and after the verification is qualified, performing transaction and broadcasting the whole network.
6. The method of claim 5, wherein the auction information comprises: the amount of electricity available for sale, the reserve price and the anonymous address of the producer or consumer are expected.
7. The method of claim 6, wherein verifying the proof of ownership of the electricity of the producer and the consumer after a successful match comprises:
the consumer sends a message containing the power ownership certificate to a database for verification through the anonymous address;
and checking the electric quantity ownership certificate based on the database, and verifying authenticity.
8. The method of claim 4 or 5, wherein the step of conducting transactions and broadcasting to the whole network after the transaction is validated comprises:
in the transaction process, the block chain cancels the electricity quantity ownership certificate of the producer and the consumer;
after logout, transferring the electric quantity ownership certificate to the name of the consumer who carries out transaction through the formula (1), and broadcasting the transaction result to the whole network;
and packaging all transaction details into blocks, storing the blocks into a block chain, and ending the transaction.
CN202111425080.1A 2021-11-26 2021-11-26 Block chain-based distributed transaction method capable of predicting electric energy among micro grids Pending CN114066530A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
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