CN111144880A - Effective energy terminal data interaction method in micro-grid system based on block chain - Google Patents
Effective energy terminal data interaction method in micro-grid system based on block chain Download PDFInfo
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- CN111144880A CN111144880A CN201811312628.XA CN201811312628A CN111144880A CN 111144880 A CN111144880 A CN 111144880A CN 201811312628 A CN201811312628 A CN 201811312628A CN 111144880 A CN111144880 A CN 111144880A
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Abstract
The invention discloses an effective interaction method for energy terminal data in a micro-grid system based on a block chain, which is characterized by comprising the following steps: each energy terminal in the micro-grid system performs data interaction based on the block loop chain; the block loop chain comprises a creation block and a plurality of loop networks formed by historical blocks and new blocks of which transactions are initiated by each energy terminal, wherein hash pointers are adopted among the creation block, the historical blocks and the new blocks to directly point to and/or indirectly point to; and the new block of the energy terminal initiating the new transaction adopts an asynchronous communication consensus mechanism to perform consensus confirmation in the block loop chain network. According to the invention, the block chain technology is applied to the micro-grid, all data in the system are finally backed up by each energy terminal node, point-to-point data security interaction can be completed without a third-party trust mechanism, and the data interaction record cannot be tampered, so that the security and reliability of a data circulation environment are ensured.
Description
Technical Field
The invention relates to the technical field of computer data processing, in particular to an interaction method of energy terminal data in a micro-grid system.
Background
With the increasingly prominent energy crisis and environmental pollution problems, research and development of green and clean renewable energy sources have become strategic and technological directions of energy development in China. And the intermittent, random and fluctuating characteristics of wind energy, photovoltaic energy and other energy sources hinder large-scale access and stable power dispatching.
The microgrid is a novel distribution power system composed of a distributed power supply, a power electronic device and a load, is a necessary network structure for distributed power generation, is a good solution for integrating the distributed power supply, and has become a research hotspot in the power industry at present. Although a traditional micro-grid system is distributed in physical deployment, data of the traditional micro-grid system is still controlled by a central node, and the data is not highly encrypted in an interaction process, however, due to the fact that distributed power sources in the micro-grid are various in types, complex in communication environment, various in operation state, and different in output characteristics and control methods, a single-point fault risk and a large number of potential safety hazards such as leakage exist in the data in the interaction process, for example, a micro-centralized service architecture is used for storing and forwarding all monitoring data and control signals through a central server, privacy data leakage and even network paralysis can be caused when the central server is attacked or due to management defects of the central node, and meanwhile, a centralized data management mode also increases the security monitoring load of the central node. With the continuous addition of each device to the microgrid, the interaction between mass devices can generate data with huge structures and different standards, thereby further increasing the challenge of safe communication between data and preventing efficient communication.
Therefore, a novel distributed technology is needed, which can ensure that data is always complete, consistent and effective before, during and after transmission, and can enable the whole microgrid to communicate with high expansion, high concurrency and high efficiency after being connected to a large number of intelligent terminals.
Blockchain technology is considered a fifth subversive innovation of computational paradigm behind mainframes, personal computers, the internet, mobile social networks, and is likened by the "economics" to be a "trusted machine". The block chain is used as a bottom layer technology of the bit currency, and is a decentralized shared general ledger which combines data blocks into a specific data structure in a chain mode according to a time sequence and is guaranteed to be not falsifiable and not forged in a cryptographic mode, and data which are simple in storage, have a precedence relationship and can be verified in a system can be safely stored. The block chain allows each device in the microgrid to perform point-to-point direct interaction, data is not managed by a certain central management mechanism, but is dispersed to each node server in a complete backup mode, and each participating main body performs information and energy exchange in the peer-to-peer network.
However, in the conventional blockchain system, transaction data and codes received within a period of time are packaged into a data block with a timestamp, the data block is linked to the current longest main blockchain after block verification and is a linear single chain, all transactions need to be sequentially queued according to a time sequence to carry out continuous workload proving to calculate a block target hash value less than or equal to a random number (Nonce), and cannot be executed concurrently, and the transaction confirmation efficiency is low; meanwhile, miners with great calculation power can only select to pack transactions meeting own interests, and the risk of malicious attack exists.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an interaction method for data of a source terminal in a micro-grid system, which can complete point-to-point data security interaction without a third-party trust mechanism, and data interaction records can not be tampered, thereby further improving the security and reliability of a data circulation environment.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
The effective interaction method of energy terminal data in the micro-grid system based on the block chain is characterized in that each energy terminal in the micro-grid system carries out data interaction based on the block loop chain; the block loop chain comprises a creation block and a plurality of loop networks formed by historical blocks and new blocks of which transactions are initiated by each energy terminal, wherein hash pointers are adopted among the creation block, the historical blocks and the new blocks to directly point to and/or indirectly point to; and the new block of the energy terminal initiating the new transaction adopts an asynchronous communication consensus mechanism to perform consensus confirmation in the block loop chain network.
According to the effective interaction method for the data of the energy terminal in the micro-grid system based on the block chain, a main chain consisting of N authoritative nodes is arranged in the block loop chain, and N is less than or equal to 1/3.
The effective interaction method for the energy terminal data in the micro-grid system based on the block chain comprises the following specific steps:
A. when a certain energy terminal node initiates a new transaction of data interaction, the node can find two past continuous history parent blocks with higher weight values to verify;
B. b, carrying out operation of workload certification based on self calculation force of the node by using the random values of the two past continuous history parent blocks determined in the step A to obtain a random number and a weight value of a block corresponding to the node;
C. b, broadcasting the operation result of the step B to all nodes of the whole network;
D. the random number obtained by the node transaction operation is simultaneously verified by the sub-blocks of new transactions initiated by other nodes in the same way;
E. when the node is directly or indirectly verified by M newly transacted sub-blocks, M is more than or equal to 5; the validity of the block is finally determined; the authority node of the main chain simultaneously adds the effective block to the main chain.
According to the effective interaction method for the data of the energy terminal in the micro-grid system based on the block chain, the weight value of each block is directly related to the calculation power of the corresponding accounting node, and the higher the calculation power of the node is, the larger the weight value of the corresponding block is; the computational power refers to the speed of the computer computing the hash function output.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
The method solves the problem of data interaction safety of the distributed energy terminals in the micro-grid by utilizing the characteristics of decentralization, transparence, non-falsification, traceability and the like of the block chain, and ensures the safety, the robustness and the expandability of the whole system.
The invention adopts a block loop chain network structure, can distribute data circulating in the micro-grid system on a plurality of node servers, can synchronize and completely backup multiple nodes of the data, and when partial nodes are attacked, the whole data is still highly effective and reliable, and the rest nodes maintain the stable operation of the system by means of the complete data. And the block chain system based on asynchronous communication consensus eliminates the security risk existing in the central organization, confirms the consistency of all data transaction processes through consensus, effectively accounts on the chain, and ensures the security of data. The invention relies on the asymmetric encryption technology of the block chain technology, all data are encrypted by a computer paradigm with high complex operational logic, and even a hacker intercepts a data ciphertext, the plaintext cannot be derived and decrypted in a single phase, so that the high safety and the non-falsification of the data are ensured.
In the invention, the initiation of each data interaction between different energy terminals is applied in the form of transaction on a chain, whether the interaction is successful or not and whether the interaction is true or not and credible depends on whether the transaction can be effectively identified and confirmed by the whole network after being broadcasted, and the whole network node participates in the verification of the transaction legality and has no transaction cost, which means that under the condition of reward, the nodes have the same motivation for participating in the accounting and can autonomously and equally account the own transaction. In the consensus process, each node has the right to autonomously and equally participate in accounting by means of self computing power, each transaction is effectively recorded, and redundant malicious transactions are eliminated; the defect that the traditional block chain system only has a small number of nodes for verifying the transaction validity, such as miners (or PoS rights and interests owners) in the whole network, is overcome.
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FIG. 1 is a schematic diagram of a block chain according to the present invention;
FIG. 2 is a flowchart illustrating the identification of the block A by the asynchronous communication common identification mechanism in this embodiment;
FIG. 3 is a schematic diagram of the embodiment in which the effective blocks are added to the main chain.
Detailed Description
The invention provides a block chain system based on a typical block chain system by combining the requirement of frequent data interaction in each intelligent terminal distributed topology network structure in a micro-grid, wherein a single-chain storage structure is changed into a multi-chain network topology structure, and high concurrent writing and parallel verification are allowed as shown in figure 1. Under the condition that the block packing time is not changed, N blocks can be packed in parallel in the network, and transactions in the network can be accommodated by N times. Meanwhile, an asynchronous communication consensus mechanism is adopted, each transaction does not need to be queued to strictly verify the uplink in time sequence, concurrent writing is allowed, a plurality of energy terminal nodes can simultaneously and jointly confirm the transaction according to different rhythms, and accounts of all the nodes at the same time may not be completely consistent but are finally synchronous.
The block loop chain system provided by the invention allows a plurality of energy terminal nodes to be capable of jointly recognizing own data interaction transaction, N blocks can be packed in parallel in the network under the condition that the block packing time is not changed, each block is verified according to the random values (Nonce) and the Weight values (Weight) of two historical continuous blocks with higher weights in parent blocks which are directly or indirectly transacted, and the random values and the Weight values are verified by sub-blocks of the block by applying the same principle, and the more times of verification, the more effective the block is. When the blocks are directly or indirectly verified by a plurality of sub-blocks, the block consensus is finally determined to be valid and is added to the main chain by the authority node. The authority nodes pre-selected in advance mainly record effective transaction and whole-network malicious transaction supervision on a main chain.
The asynchronous communication consensus mechanism ensures that each node of the whole network participates in data transaction and packages blocks, enhances the high expansibility and high capacity of data interaction of the whole micro-grid system, improves the efficiency of data interaction among the intelligent terminals under the condition of ensuring that the data are consistently completed, and finally improves the running speed of the whole system.
The invention will be described in further detail below with reference to the figures and specific examples.
According to the invention, each energy terminal in the micro-grid system carries out data interaction based on the block loop chain. The block loop chain comprises a creation block and a plurality of loop networks formed by historical blocks and new blocks of which transactions are initiated by each energy terminal, and as shown in fig. 1, hash pointers are adopted among the creation block, the historical blocks and the new blocks to directly point to and/or indirectly point to; and the new block of the energy terminal initiating the new transaction adopts an asynchronous communication consensus mechanism to perform consensus confirmation in the block loop chain network. A main chain consisting of N authoritative nodes is arranged in the block loop chain, all the nodes with the N being less than or equal to 1/3 are obtained by adopting a mode of realizing selection by using the authoritative nodes as witnesses, and the authoritative nodes are responsible for confirming the transaction effectiveness on the main chain and checking the whole network transaction.
The traditional asynchronous communication consensus mechanism can cause possibility of double-flower attacks, namely, two conflicting transactions are added at two different positions by an attacker and are continuously verified forwards on a chain, and hard forking can be caused finally.
A. When a certain energy terminal node A initiates a new transaction of data interaction, the node can find two past continuous history parent blocks with higher weight values to verify. For example, as shown in fig. 2, the node a may find B, C, D, F the B block with the highest weight value and the direct parent E block with the highest weight value among the four parent blocks directly related to a for verification.
The weight value of each block is directly related to the computing power of the corresponding accounting node, namely the computing speed of the hash function output by a Computer (CPU), and the higher the computing power of the node is, the larger the weight value of the corresponding block is.
B. And D, performing workload certification operation based on the self calculation force of the node by using the random values of the two past continuous history parent blocks determined in the step A to obtain a random number (nonce (A)) and a weight value (W (A)) of the block corresponding to the node. Continuing with the above example, B, E random values (Nonce) for two parent tiles are utilized to perform a proof of workload (PoW) operation based on the node a self-calculated force.
C. And B, broadcasting the random number (nonce (A)) and the weighted value (W (A)) of the operation result of the step B to all nodes of the whole network.
D. The random number (nonce (a)) obtained by the node transaction operation is verified by the sub-block of the new transaction initiated by other nodes in the same way. In this embodiment, the random number (nonce (a)) of the transaction of the node a is verified by the sub-block G of the new transaction initiated by another node in the same manner, as shown in fig. 2; the more times it is verified by other nodes, the higher the probability that the block a corresponding to node a initiates a transaction is valid.
E. When the node is directly or indirectly verified by M newly transacted sub-blocks, M is more than or equal to 5; the validity of the block is finally determined; the authority node of the main chain simultaneously adds the effective block to the main chain.
In this embodiment, the value of M is 6, when the block a is directly or indirectly verified by 6 new transaction sub-blocks, the validity of the block a is finally determined, and the authority node of the main chain adds the valid block to the main chain at the same time, as shown in fig. 3.
The invention adopts the transaction with high weight value to carry out verification, which is helpful to increase the possibility that the transaction is verified by the subsequent transaction. If the node binds illegal transactions, the later transactions can not be selected for verification, and if the time is long, the transactions are abandoned by the network and are not part of the network any more, and then some illegal malicious transactions are eliminated. Moreover, the invention provides that each block is sequentially arranged according to the weight value for verification so as to obtain consistency, and a user can know which block is a created block, which block is next to the last block, which block transaction is priority processing and the like, so that the occurrence of double-flower events is reduced, and the tracing and the data consistency maintenance are realized.
According to the invention, the block chain technology is applied to the micro-grid, all data in the system are finally backed up by each energy terminal node, point-to-point data security interaction can be completed without a third-party trust mechanism, and the data interaction record cannot be tampered, so that the security and reliability of a data circulation environment are ensured.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. An effective interaction method for energy terminal data in a micro-grid system based on a block chain is characterized in that: each energy terminal in the micro-grid system performs data interaction based on the block loop chain; the block loop chain comprises a creation block and a plurality of loop networks formed by historical blocks and new blocks of which transactions are initiated by each energy terminal, wherein hash pointers are adopted among the creation block, the historical blocks and the new blocks to directly point to and/or indirectly point to; and the new block of the energy terminal initiating the new transaction adopts an asynchronous communication consensus mechanism to perform consensus confirmation in the block loop chain network.
2. The effective interaction method for energy terminal data in the block chain-based micro-grid system according to claim 1, characterized in that: a main chain consisting of N authoritative nodes is arranged in the block loop chain, and N is less than or equal to 1/3.
3. The effective interaction method for energy terminal data in the block chain-based microgrid system as claimed in claim 2, characterized in that the specific method of the asynchronous communication consensus mechanism is as follows:
A. when a certain energy terminal node initiates a new transaction of data interaction, the node can find two past continuous history parent blocks with higher weight values to verify;
B. b, carrying out operation of workload certification based on self calculation force of the node by using the random values of the two past continuous history parent blocks determined in the step A to obtain a random number and a weight value of a block corresponding to the node;
C. b, broadcasting the operation result of the step B to all nodes of the whole network;
D. the random number obtained by the node transaction operation is simultaneously verified by the sub-blocks of new transactions initiated by other nodes in the same way;
E. when the node is directly or indirectly verified by M newly transacted sub-blocks, M is more than or equal to 5; the validity of the block is finally determined; the authority node of the main chain simultaneously adds the effective block to the main chain.
4. The method for efficient interaction of energy terminal data in the microgrid system based on block chains as claimed in claim 3, wherein the weight value of each block is directly related to the computing power of its corresponding accounting node, and the higher the computing power of the node is, the larger the weight value of its corresponding block is; the computational power refers to the speed of the computer computing the hash function output.
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