CN112580988A - Power grid security risk management and control method based on block chain technology - Google Patents
Power grid security risk management and control method based on block chain technology Download PDFInfo
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Abstract
The embodiment of the application provides a power grid security risk management and control method based on a block chain technology, which comprises the steps of initializing a system and carrying out registration transaction on an intelligent power distribution and utilization terminal connected to a transformer substation and accessed to the Internet of things of a terminal for the first time; the method comprises the following steps that a system is initialized, a control terminal creates a corresponding block chain account for each block chain node including the control terminal by using an account generation tool, and intelligent contract deployment is completed; and registering the intelligent power distribution terminal connected to the transformer substation and accessed to the Internet of things of the terminal for the first time. Through being equipped with control terminal in the block chain network, control terminal is used for specially carrying out the identity to station side intelligence distribution terminal and audits, can independently carry out registration and update transaction, has improved the management efficiency greatly, reduces resource consumption. Because the intelligent power distribution and utilization terminal management system on the station side needs to send related requests to the control terminal through the block chain network, and the block chain network links records on the related requests and transactions, data cannot be tampered, and the data can be stored permanently, and the safety is high.
Description
Technical Field
The application relates to the field of risk management and control, in particular to a power grid security risk management and control method based on a block chain technology.
Background
In recent years, with the gradual expansion of power transmission networks, the requirement for inspecting the overhead power transmission line is higher and higher, the requirement for working cannot be met by simply depending on a manual power transmission line inspection mode, and the change from labor-intensive power transmission line inspection to technology-intensive power transmission line inspection is certainly promoted. At present, the power transmission line inspection operation vehicle can only transport personnel and equipment, and an integrated power inspection integrated vehicle which can remotely control an unmanned aerial vehicle, perform data interaction with a command center and provide power guarantee is still lacking.
In summary, in consideration of standardizing the inspection work of the power transmission line machine, uniformly managing and analyzing the work data, improving the inspection work efficiency of the power transmission line machine and reducing the workload of the inspection worker, a four-stage linkage power transmission line inspection work method and system of province and city stations of the air-ground integrated network are required to be developed so as to improve the standardization and automation level of the power transmission line inspection work.
Disclosure of Invention
The embodiment of the application provides a power grid security risk management and control method based on a block chain technology, and the control terminal is specially used for identity verification of an intelligent power distribution terminal on a station side and can independently execute registration and updating transaction through the block chain network, so that the management efficiency is greatly improved, and the resource consumption is reduced.
Specifically, the power grid security risk management and control method based on the blockchain technology provided by the embodiment of the present application is applied to a power grid security risk management and control system based on the blockchain technology, and the method includes:
initializing a system and performing registration transaction on an intelligent power distribution terminal connected to a transformer substation and accessed to the Internet of things of a terminal for the first time;
the method comprises the following steps that a system is initialized, a control terminal creates a corresponding block chain account for each block chain node including the control terminal by using an account generation tool, and intelligent contract deployment is completed;
the intelligent power distribution terminal connected to the transformer substation and accessed to the Internet of things of the terminal for the first time is registered, and the method comprises the following steps:
the control terminal receives a registration request of an intelligent power distribution terminal connected to a transformer substation through a block chain network, and performs identity verification on the intelligent power distribution terminal connected to the transformer substation; the registration request comprises terminal identity information;
after the verification is passed, the control terminal generates a unique ID and a pair of public and private keys for the intelligent power distribution terminal connected to the transformer substation;
the control terminal encapsulates data comprising the public key and the ID into a registration transaction and issues the registration transaction to the blockchain network;
the Ethernet shop virtual machines of all block chain nodes in the block chain network start to execute the registration function in the intelligent contract, after the intelligent contract is successfully executed, successfully mine digging and verification are carried out, the registration transaction record is added to the block chain network, and the execution result is returned to the control terminal;
and after the transaction record is successfully added to the block chain network, the control terminal sends the data containing the ID and the private key to the intelligent power distribution terminal connected to the transformer substation.
Optionally, the registration request further includes device basic information, parameter configuration information, topology information, and service capability information.
Optionally, when the control terminal generates the public and private keys, the control terminal also generates the validity period of the public and private keys correspondingly.
Optionally, the method further includes performing update transaction on the intelligent power distribution and utilization terminal connected to the substation, where the function is to be upgraded, and the method includes the following steps:
the method comprises the steps that a control terminal receives an updating request of an intelligent power distribution terminal connected to a transformer substation, which needs function upgrading, through a block chain network, and identity verification is carried out on the intelligent power distribution terminal connected to the transformer substation; the updating request comprises upgrading configuration information and public key information about to fail;
after the verification is passed, the control terminal generates a pair of new public and private keys for the intelligent power distribution terminal connected to the transformer substation;
the control terminal encapsulates the data comprising the new public key and the ID into an update transaction and issues the update transaction to the blockchain network;
the Ethernet shop virtual machines of all block chain nodes in the block chain network start to execute an updating function in the intelligent contract, after the intelligent contract is successfully executed, successfully mined and verified, an updated transaction record is added to the block chain network, and an execution result is returned to the control terminal;
and after the transaction record is successfully added to the block chain network, the control terminal sends the data containing the ID and the new private key to the intelligent power distribution and utilization terminal connected to the transformer substation.
Optionally, the terminal management and control unit is an intelligent terminal monitoring device capable of recording a fault of the terminal; the intelligent contract also comprises a revocation public key function and a voting function; the method also comprises the step of carrying out revocation transaction on the intelligent power distribution and utilization terminal connected to the transformer substation, and comprises the following steps:
when the terminal control unit receives a fault message of an intelligent power distribution terminal connected to a transformer substation, the terminal control unit carries out primary voting marking on the intelligent power distribution terminal connected to the transformer substation;
the terminal control unit packages the ID of the intelligent power distribution terminal connected to the transformer substation as a parameter into a fault transaction and issues the fault transaction to the block chain network;
all block chain link points in the block chain network execute a voting function of an intelligent contract, namely, one is added to the number of votes before the intelligent distribution terminal connected to the transformer substation, and fault transactions are stored in the block chain network;
when the voting number Voti of the intelligent power distribution terminal connected to the transformer substation exceeds a threshold Thr, the intelligent contract returns the ID of the intelligent power distribution terminal connected to the transformer substation to the control terminal;
the control terminal audits the voting number Voti, and when the number of times of faults of the intelligent power distribution and utilization terminal connected to the transformer substation is found to exceed a threshold value Thr, the intelligent power distribution and utilization terminal is defined as a fault terminal;
the control terminal encapsulates the ID of the fault terminal into a revocation transaction and issues the revocation transaction to the blockchain network;
and the Ethernet shop virtual machines of all the block chain nodes in the block chain network start to execute the revocation function in the intelligent contract, after the intelligent contract is successfully executed, successfully mine excavation and verification are carried out, the revocation transaction record is added to the block chain network, and the public key of the fault terminal is identified as invalid and returned to the execution result.
Optionally, when the control terminal sends the private key to the intelligent power distribution terminal connected to the substation, the m bivariate polynomials are randomly selected for the intelligent power distribution terminal connected to the substation, and the corresponding authentication value KV and the polynomial fragment F are generated, so that the private key is sent to the intelligent power distribution terminal connected to the substation in a safe manner.
Optionally, the power grid security risk management and control system based on the blockchain technology includes:
the intelligent distribution and power utilization system comprises a block chain network formed by a plurality of terminal control units, wherein intelligent distribution and power utilization terminals in all substations in the power grid are accessed to the block chain network through the corresponding terminal control units;
the intelligent distribution and power utilization terminal connected to the transformer substation is in bidirectional communication connection with the control terminal through the block chain network;
the control terminal is provided with the following functional modules: the system comprises an account generation module, an intelligent contract deployment module, an identity auditing module and a transaction issuing module;
the account generation module is used for creating a corresponding blockchain account for each blockchain node in the blockchain network;
the intelligent contract deployment module is used for deploying sharable intelligent contracts in a blockchain network, and the intelligent contracts comprise a registration public key function and an update public key function;
the identity auditing module is used for auditing the identity information of the intelligent power distribution and utilization terminal connected to the transformer substation;
the transaction issuing module is used for generating a pair of public private keys according to the intelligent contract of the intelligent power distribution terminal which passes identity verification and is connected to the transformer substation, packaging data comprising the ID and the public keys into a transaction and issuing the transaction to the block chain network, and meanwhile sending the private keys to the intelligent power distribution terminal connected to the transformer substation.
Optionally, the terminal management and control unit is an intelligent terminal monitoring device capable of recording terminal fault information.
The beneficial effect that technical scheme that this application provided brought is:
the block chain network constructed by the method is not a pure block chain network, the block chain network is also provided with a control terminal, the control terminal is specially used for identity verification of the intelligent power distribution terminal on the station side, registration and updating transaction can be independently executed, the management efficiency is greatly improved, and the resource consumption is reduced. Meanwhile, the intelligent power distribution and utilization terminal management system on the station side needs to send related requests to the control terminal through the block chain network, and the block chain network links records on the related requests and transactions, so that data cannot be falsified, the data can be stored permanently, the safety is high, and the traceability is realized.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flowchart of a power grid security risk control method based on a block chain technology according to an embodiment of the present application.
Detailed Description
To make the structure and advantages of the present application clearer, the structure of the present application will be further described with reference to the accompanying drawings.
The power grid security risk control method based on the block chain technology provided by the embodiment of the application is applied to a power grid security risk control system based on the block chain technology, and is shown in reference to fig. 1, and the method comprises the following steps:
initializing a system and performing registration transaction on an intelligent power distribution terminal connected to a transformer substation and accessed to the Internet of things of a terminal for the first time;
the method comprises the following steps that a system is initialized, a control terminal creates a corresponding block chain account for each block chain node including the control terminal by using an account generation tool, and intelligent contract deployment is completed;
the intelligent power distribution terminal connected to the transformer substation and accessed to the Internet of things of the terminal for the first time is registered, and the method comprises the following steps:
the control terminal receives a registration request of an intelligent power distribution terminal connected to a transformer substation through a block chain network, and performs identity verification on the intelligent power distribution terminal connected to the transformer substation; the registration request comprises terminal identity information;
after the verification is passed, the control terminal generates a unique ID and a pair of public and private keys for the intelligent power distribution terminal connected to the transformer substation;
the control terminal encapsulates data comprising the public key and the ID into a registration transaction and issues the registration transaction to the blockchain network;
the Ethernet shop virtual machines of all block chain nodes in the block chain network start to execute the registration function in the intelligent contract, after the intelligent contract is successfully executed, successfully mine digging and verification are carried out, the registration transaction record is added to the block chain network, and the execution result is returned to the control terminal;
and after the transaction record is successfully added to the block chain network, the control terminal sends the data containing the ID and the private key to the intelligent power distribution terminal connected to the transformer substation.
According to the specific implementation, the management system for the intelligent power distribution and utilization terminal on the plant side based on the block chain can realize three functions of first access, function upgrading and fault quitting when the intelligent power distribution and utilization terminal on the plant side is automatically accessed into the power Internet of things system. An electronic key management framework is constructed by utilizing a block chain technology, so that an intelligent power distribution and utilization terminal on a station side can automatically access to an electric power internet of things, and the method comprises the following steps:
1) the method comprises the steps that a system is initialized, a management center needs to create a block chain account for each node (namely each terminal management and control unit node) in a block chain network by using an Ethernet wallet or other account generation tools, meanwhile, an account needs to be generated for the management center, and deployment of an intelligent contract is completed, wherein the intelligent contract mainly comprises four functions of registering a public key function register EntityPK, updating the public key function update EntityPK, revoking the public key function revoke EntityPK and voting the functions are respectively used for realizing functions of terminal first access, function upgrade and fault exit.
2) When the intelligent power distribution and utilization terminal on the plant side is installed and powered on for the first time, communication is established with the control terminal through the control unit, a registration application instruction is sent to the control terminal, recorded terminal identity information is sent to the control terminal to be checked, the control terminal generates an identity and a secret key for the control terminal, and data are packaged into a transaction and issued to the block chain network, so that public key registration operation of terminal first access is completed.
3) When the intelligent power distribution terminal on the station side performs function upgrading as required, a key information updating request is sent to the control terminal, the control terminal generates a new key for the key information updating request, and data is packaged into a transaction and issued to the blockchain network, so that public key updating operation of terminal upgrading is completed.
4) When the intelligent power distribution and utilization terminal on the plant side breaks down for multiple times and needs to quit the Internet of things, the identity and the public key of the intelligent power distribution and utilization terminal are revoked by the control terminal, the control terminal packages the public key of the terminal to be revoked into a transaction and then issues the transaction to the block chain network, and when the intelligent contract is successfully executed and the block mine is successfully dug, the public key of the terminal is formally revoked, and the terminal quits.
The specific steps of the operation flow of the terminal for the first access registration are as follows:
firstly, the intelligent power distribution terminal is accessed to the Internet of things for the first time, after the intelligent power distribution terminal is installed and powered on site, registration information including basic equipment information, parameter configuration information, topology information, service capability information and the like is submitted to the control terminal, and the control terminal can inspect the submitted information so as to ensure that the intelligent power distribution terminal can work normally.
And secondly, after the examination, the control terminal generates a unique ID, a pair of public and private keys (PubK and PrIK) and the Validity Period (VP) of the public and private keys for the terminal. In addition, the control terminal randomly selects m bivariate polynomials for the terminal, generates corresponding authentication values KV and polynomial fragments F, calculates keys by using bivariate polynomial key theory, and is used for transaction release in the block chain network.
And thirdly, the control terminal encapsulates the (ID, PubK, V P) into data in a JSON format, encodes the data into hexadecimal data, and then assembles the data into a transaction. Then, the control terminal sends the transaction to the block chain network, the Ethernet shop virtual machines of all nodes in the network start to execute the registration function register EntityPK in the contract, after the intelligent contract is successfully executed and successfully mined and verified, the transaction record is added to the block chain, and the execution result is returned to the control terminal.
And fourthly, after the control terminal obtains the result that the public key data of the terminal is successfully linked, the control terminal distributes the ID, the PrIK, the V P and the related parameters of the polynomial to the terminal in a safe mode. At this point, the public key registration process is completed, and the intelligent power distribution and utilization terminal completes the first access.
The specific steps of the operation flow of public key update during terminal upgrade are as follows:
firstly, the public key of the intelligent power distribution and utilization terminal needs to be updated when the function of the terminal is upgraded, the terminal sends an updating request to the control terminal, and the request information comprises upgrading configuration information and information of the public key to be invalid, namely { ID, PubK, V P }. The control terminal will simply verify the terminal, and after the verification is passed, the control terminal will generate a new public and private key pair (newPubK and newPriK) and a new validity period (newVP) for the terminal.
And secondly, the control terminal encapsulates the ID, the newP ubK and the newV P into data in a JSON format, encodes the data into hexadecimal data, further assembles the data into a transaction and issues the transaction to a block chain network, the Ethernet virtual machines of all nodes in the network start to execute an update function updateEntityPK in the contract, and after the intelligent contract is successfully executed and excavated, transaction records are added to the block chain and return to an execution result of the control terminal.
Thirdly, after successfully linking the updated public key data, the control terminal needs to update the polynomial allocated to the terminal before, that is, the control terminal selects m polynomials again, generates the corresponding authentication value KV and the polynomial fragment F, and sends { ID, newPriK, newVP } and the relevant parameters of the new polynomial to the terminal in a secure manner. And finishing the updating process of the terminal function upgrading.
The specific steps of the terminal fault quitting operation process are as follows:
when the terminal management and control unit receives a fault message of a terminal, the management and control unit marks a vote for the terminal once. The management and control unit takes the ID of the terminal as a parameter, packages the ID into a transaction and issues the transaction to the blockchain network, the node in the network starts to execute the voting function vote of the intelligent contract, namely, adds one to the previous vote number Vot, and the transaction record is stored on the blockchain.
When the number of votes of the terminal exceeds a certain threshold Thr, namely Voti is not less than T hr, the intelligent dating returns the ID of the terminal to the control terminal, and the number of times of the terminal having faults is found to exceed the threshold Thr through auditing of the control terminal, so that the terminal is defined as a fault terminal.
And thirdly, after the control terminal determines the fault terminal, the public key of the terminal needs to be cancelled. The control terminal encapsulates the ID into data in a JSON format, encodes the data into hexadecimal data, further assembles the data into a revocation transaction, and sends the formed transaction to a block chain network, the Etherhouse virtual machines of all nodes in the network start to execute a revocation function revokeEntityPK in a contract, after the intelligent contract is successfully executed and mined, a transaction record of public key revocation is added to the block chain, and the public key of a fault terminal is identified as invalid and returns an execution result to the control terminal. And at this point, the public key of the terminal is cancelled, and the fault exit function process is completed.
A station side intelligent power distribution and utilization terminal management system based on a block chain comprises a block chain network formed by a plurality of terminal control units, wherein each station side intelligent power distribution and utilization terminal is connected to the block chain network through a corresponding terminal control unit; the block chain network also comprises a control terminal (Trust Authority), and the intelligent power distribution terminal on the plant station side is in bidirectional communication connection with the control terminal through the block chain network; in fig. 1, a terminal management and control unit server is a virtual server configured in a terminal management and control unit, and is used for implementing the function of a blockchain node; the control terminal is provided with the following functional modules: the system comprises an account generation module, an intelligent contract deployment module, an identity auditing module and a transaction issuing module; the account generation module is used for creating a corresponding blockchain account for each blockchain node in the blockchain network; the intelligent contract deployment module is used for deploying sharable intelligent contracts in a blockchain network, and the intelligent contracts comprise a registration public key function and an update public key function; the identity auditing module is used for auditing the identity information of the intelligent power distribution terminal at the station side; and the transaction issuing module is used for generating a pair of public private keys according to the intelligent contract of the intelligent power distribution terminal of the plant side which passes the identity verification, packaging data comprising the ID and the public keys into a transaction and issuing the transaction to the block chain network, and simultaneously sending the private keys to the intelligent power distribution terminal of the plant side.
In this embodiment, the terminal management and control unit is an intelligent terminal monitoring device capable of recording terminal fault information. The terminal control unit is intelligent terminal monitoring equipment capable of recording terminal fault information, and can adopt intelligent terminal monitoring equipment which is deployed on the spot, so that the transformation cost is greatly reduced. Meanwhile, fault monitoring and a block chain network can be combined to form a brand-new fault exit mode, namely, a revocation transaction is carried out on the intelligent power distribution and utilization terminal on the plant station side on the block chain.
The blockchain is essentially a decentralized distributed database, which can realize distributed recording and distributed storage of data information, and is a data structure combining blocks in a chain manner. The block chain technology uses a cryptographic means to generate a set of databases which are not falsifiable and reliable and have time records in sequence, the databases adopt decentralized storage and can effectively ensure the safety of data, and participants can establish consensus on the time sequence and the current state of the whole network transaction records.
The block chain technology divides data to be stored in the database into different blocks, each block is linked to the back of the previous block through specific information, and the blocks are connected together in time sequence to form a complete set of data. Each blockchain database is essentially a time chain serially connected in time sequence, and uses a cryptographic mechanism specified by a protocol to perform identity authentication, and simultaneously ensures that the content of data cannot be tampered and forged, as shown in the following figure:
a block in a typical blockchain data structure includes three parts:
block head: the hash of the current block, the block serial number and the hash of the previous block are included;
block data: array of transaction components
Metadata: metadata associated with a current tile
The project service data is mainly stored in block data and comprises equipment, defects, hidden dangers, quality of operating personnel (safety level, qualification certificate, violation record, operation experience and the like), safety tools and the like.
The intelligent contract is an important support for combining the blockchain and the actual application scene, and is a technical basis for the blockchain to be called subversive technology. The intelligent contract of the block chain comprises the saving and the processing of the state of the transaction, the transaction mainly comprises data to be sent, and the event is the description information of the data. And after the transaction and event information is handed over to the intelligent contract, the resource state in the contract resource set is updated, and the intelligent contract is triggered to judge the state machine. And if the event action meets the triggering condition, selecting the contract action to be automatically and correctly executed by the state machine according to the preset information of the participants. The execution result of the intelligent contract can update the state of the ledger on the Ethernet network.
The project is based on an intelligent contract technology, interaction between an interaction model of each service system (such as a PMS (permanent magnet synchronous machine) system, a security risk management and control system and the like) and a block chain database is realized, and the intelligent contract mainly comprises the following interfaces:
1. reading, adding, updating and deleting equipment;
2. reading, adding, updating and deleting defects;
3. reading, adding, updating and deleting hidden dangers;
4. reading, adding, updating and deleting the quality (safety level, qualification certificate, violation record, operation experience and the like) of the operator;
5. and reading, adding, updating and deleting the safety tool ledger.
Each station side intelligent power distribution terminal is accessed to the block chain network through a corresponding terminal control unit, and the same terminal control unit can be simultaneously connected with a plurality of station side intelligent power distribution terminals with different communication protocols, so that the defect that the station side intelligent power distribution terminals are difficult to form the Internet of things due to the fact that the communication protocols are not uniform is overcome. The terminal control unit is intelligent terminal monitoring equipment capable of recording terminal fault information, and can adopt intelligent terminal monitoring equipment which is deployed on the spot, so that the transformation cost is greatly reduced. Meanwhile, fault monitoring and a block chain network can be combined to form a brand-new fault exit mode, namely, a revocation transaction is carried out on the intelligent power distribution and utilization terminal on the plant station side on the block chain. This application is all carried out voluntarily to registration, update and the cancellation of station side intelligence distribution of power consumption terminal: the intelligent power distribution terminal at the station side sends out a request or a fault message, and the block chain network responds without human intervention.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The power grid security risk control method based on the block chain technology is characterized by being applied to a power grid security risk control system based on the block chain technology, and the method comprises the following steps:
initializing a system and performing registration transaction on an intelligent power distribution terminal connected to a transformer substation and accessed to the Internet of things of a terminal for the first time;
the method comprises the following steps that a system is initialized, a control terminal creates a corresponding block chain account for each block chain node including the control terminal by using an account generation tool, and intelligent contract deployment is completed;
the intelligent power distribution terminal connected to the transformer substation and accessed to the Internet of things of the terminal for the first time is registered, and the method comprises the following steps:
the control terminal receives a registration request of an intelligent power distribution terminal connected to a transformer substation through a block chain network, and performs identity verification on the intelligent power distribution terminal connected to the transformer substation; the registration request comprises terminal identity information;
after the verification is passed, the control terminal generates a unique ID and a pair of public and private keys for the intelligent power distribution terminal connected to the transformer substation;
the control terminal encapsulates data comprising the public key and the ID into a registration transaction and issues the registration transaction to the blockchain network;
the Ethernet shop virtual machines of all block chain nodes in the block chain network start to execute the registration function in the intelligent contract, after the intelligent contract is successfully executed, successfully mine digging and verification are carried out, the registration transaction record is added to the block chain network, and the execution result is returned to the control terminal;
and after the transaction record is successfully added to the block chain network, the control terminal sends the data containing the ID and the private key to the intelligent power distribution terminal connected to the transformer substation.
2. The power grid security risk management and control method based on the blockchain technology according to claim 1, wherein the power grid security risk management and control method comprises the following steps: the registration request also includes basic device information, parameter configuration information, topology information and service capability information.
3. The power grid security risk management and control method based on the blockchain technology according to claim 1, wherein the power grid security risk management and control method comprises the following steps: when the control terminal generates the public and private keys, the control terminal also correspondingly generates the validity period of the public and private keys.
4. The power grid security risk management and control method based on the blockchain technology according to claim 1, wherein the power grid security risk management and control method comprises the following steps: the method also comprises the step of carrying out updating transaction on the intelligent distribution and utilization terminal which needs to be functionally upgraded and is connected to the transformer substation, and the method comprises the following steps:
the method comprises the steps that a control terminal receives an updating request of an intelligent power distribution terminal connected to a transformer substation, which needs function upgrading, through a block chain network, and identity verification is carried out on the intelligent power distribution terminal connected to the transformer substation; the updating request comprises upgrading configuration information and public key information about to fail;
after the verification is passed, the control terminal generates a pair of new public and private keys for the intelligent power distribution terminal connected to the transformer substation;
the control terminal encapsulates the data comprising the new public key and the ID into an update transaction and issues the update transaction to the blockchain network;
the Ethernet shop virtual machines of all block chain nodes in the block chain network start to execute an updating function in the intelligent contract, after the intelligent contract is successfully executed, successfully mined and verified, an updated transaction record is added to the block chain network, and an execution result is returned to the control terminal;
and after the transaction record is successfully added to the block chain network, the control terminal sends the data containing the ID and the new private key to the intelligent power distribution and utilization terminal connected to the transformer substation.
5. The power grid security risk management and control method based on the blockchain technology according to claim 1, wherein the power grid security risk management and control method comprises the following steps: the terminal control unit is intelligent terminal monitoring equipment capable of recording faults of the terminal; the intelligent contract also comprises a revocation public key function and a voting function; the method also comprises the step of carrying out revocation transaction on the intelligent power distribution and utilization terminal connected to the transformer substation, and comprises the following steps:
when the terminal control unit receives a fault message of an intelligent power distribution terminal connected to a transformer substation, the terminal control unit carries out primary voting marking on the intelligent power distribution terminal connected to the transformer substation;
the terminal control unit packages the ID of the intelligent power distribution terminal connected to the transformer substation as a parameter into a fault transaction and issues the fault transaction to the block chain network;
all block chain link points in the block chain network execute a voting function of an intelligent contract, namely, one is added to the number of votes before the intelligent distribution terminal connected to the transformer substation, and fault transactions are stored in the block chain network;
when the voting number Voti of the intelligent power distribution terminal connected to the transformer substation exceeds a threshold Thr, the intelligent contract returns the ID of the intelligent power distribution terminal connected to the transformer substation to the control terminal;
the control terminal audits the voting number Voti, and when the number of times of faults of the intelligent power distribution and utilization terminal connected to the transformer substation is found to exceed a threshold value Thr, the intelligent power distribution and utilization terminal is defined as a fault terminal;
the control terminal encapsulates the ID of the fault terminal into a revocation transaction and issues the revocation transaction to the blockchain network;
and the Ethernet shop virtual machines of all the block chain nodes in the block chain network start to execute the revocation function in the intelligent contract, after the intelligent contract is successfully executed, successfully mine excavation and verification are carried out, the revocation transaction record is added to the block chain network, and the public key of the fault terminal is identified as invalid and returned to the execution result.
6. The power grid security risk management and control method based on the blockchain technology according to claim 1 or 4, wherein the power grid security risk management and control method comprises the following steps: when the control terminal sends the private key to the intelligent power distribution terminal connected to the transformer substation, m bivariate polynomials are randomly selected for the intelligent power distribution terminal connected to the transformer substation, and corresponding authentication values KV and polynomial fragments F are generated and sent to the intelligent power distribution terminal connected to the transformer substation in a safe mode.
7. The method as claimed in claim 1, wherein the system comprises:
the intelligent distribution and power utilization system comprises a block chain network formed by a plurality of terminal control units, wherein intelligent distribution and power utilization terminals in all substations in the power grid are accessed to the block chain network through the corresponding terminal control units;
the intelligent distribution and power utilization terminal connected to the transformer substation is in bidirectional communication connection with the control terminal through the block chain network;
the control terminal is provided with the following functional modules: the system comprises an account generation module, an intelligent contract deployment module, an identity auditing module and a transaction issuing module;
the account generation module is used for creating a corresponding blockchain account for each blockchain node in the blockchain network;
the intelligent contract deployment module is used for deploying sharable intelligent contracts in a blockchain network, and the intelligent contracts comprise a registration public key function and an update public key function;
the identity auditing module is used for auditing the identity information of the intelligent power distribution and utilization terminal connected to the transformer substation;
the transaction issuing module is used for generating a pair of public private keys according to the intelligent contract of the intelligent power distribution terminal which passes identity verification and is connected to the transformer substation, packaging data comprising the ID and the public keys into a transaction and issuing the transaction to the block chain network, and meanwhile sending the private keys to the intelligent power distribution terminal connected to the transformer substation.
8. The power grid security risk management and control method based on the blockchain technology according to claim 7, wherein the method comprises the following steps: the terminal control unit is intelligent terminal monitoring equipment capable of recording terminal fault information.
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