CN114169001A - Block chain-based double-confirmation fixed value modification method and system for relay protection device - Google Patents

Block chain-based double-confirmation fixed value modification method and system for relay protection device Download PDF

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Publication number
CN114169001A
CN114169001A CN202111480595.1A CN202111480595A CN114169001A CN 114169001 A CN114169001 A CN 114169001A CN 202111480595 A CN202111480595 A CN 202111480595A CN 114169001 A CN114169001 A CN 114169001A
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value
protection device
file
block chain
fixed value
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Inventor
唐毅
肖冬霖
刘丹
麻可
刘天祥
房国俊
宋宗勋
徐凯
王安宁
范荣奇
李靖
朱倩茹
张强
马强
宋飞飞
逯康康
邵莘尧
邱晔
张永东
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State Grid Corp of China SGCC
State Grid Shandong Electric Power Co Ltd
Weihai Power Supply Co of State Grid Shandong Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Shandong Electric Power Co Ltd
Weihai Power Supply Co of State Grid Shandong Electric Power Co Ltd
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Priority to CN202111480595.1A priority Critical patent/CN114169001A/en
Publication of CN114169001A publication Critical patent/CN114169001A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
    • G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
    • G06F21/6227—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database where protection concerns the structure of data, e.g. records, types, queries
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/602—Providing cryptographic facilities or services
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures

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  • Computer Security & Cryptography (AREA)
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  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Databases & Information Systems (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention provides a block chain-based double-confirmation fixed value modification method and system for a relay protection device. The method comprises the steps of establishing a protection information block chain network, regarding a regulation cloud platform as a full node in the block chain network, and regarding a protection device as a light node in the block chain network; the fixed value template file is subjected to hash encryption to obtain a hash value of the fixed value template file, the hash value of the fixed value template file is stored in a block chain, and the one-to-one corresponding relation between the fixed value template file and the protection device is established; uploading the constant value template file to a regulation cloud platform through a master station, carrying out consistency check on the side of the regulation cloud platform by means of a block chain network, and carrying out setting calculation after the check is passed; and carrying out Hash encryption on the complete constant value file generated after the constant calculation, storing the Hash value in a block chain, simultaneously issuing the constant value file to a protection device, carrying out consistency check on the protection device side by means of a block chain network, and carrying out automatic setting and manual check after the check to complete double confirmation of remote constant value modification.

Description

Block chain-based double-confirmation fixed value modification method and system for relay protection device
Technical Field
The invention belongs to the field of relay protection device management and control, and particularly relates to a block chain-based double-confirmation fixed value modification method and system for a relay protection device.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The fixed value of the relay protection device is very important, and is related to whether the protection device can work normally. Once the protection fixed value is wrong, the protection device may malfunction or refuse to operate, so as to further affect the safe and stable operation of the power grid, and serious accidents such as power grid instability, large-area power failure of users and the like may be caused in severe cases.
Because the protection constant value is very important, the requirements for managing and setting the protection constant value on site are very strict. In order to avoid the error of the fixed value of the protection device, at present, a worker is required to input the fixed value one by adopting a manual operation device on the spot according to a protection fixed value list provided by a management department, and a mode of remotely loading the fixed value is not allowed. And when the fixed value is input on site, one person is needed to operate and one person is needed to monitor, so that the possibility of errors caused by manual operation is reduced. Such protection constant management and operation modes have the following problems: 1) the working process is complicated and the working efficiency is low. To make protection value inputs or changes, personnel must first arrive at the substation site and must issue work and operation tickets as required by regulations before operation. When the fixed value input operation is carried out, one person operates and the other person monitors, the operator needs to say the operation work content and the fixed value, the monitor needs to repeat, the whole working process is complicated, and the efficiency is low. Statistical data shows that the input and modification work of the fixed value of the protection device accounts for 40-60% of the total workload of the related team; 2) the manual input of the constant value cannot completely avoid the possibility of errors. Although the operator + guardian mode is adopted, the possibility of error in the setting of the protection device cannot be completely avoided. The situation that the fixed value in the protection device is inconsistent with the fixed value on the fixed value list provided by the management department is found in the actual field for many times.
Disclosure of Invention
In order to solve at least one technical problem in the background art, the invention provides a block chain-based double-confirmation fixed value modification method and system for a relay protection device. The method has the advantages that the traditional method for checking the consistency of the setting of the fixed value by means of the block chain network is added while the correctness of the setting of the fixed value is manually confirmed, double confirmation is formed, the working process of the setting of the fixed value of the protection device can be greatly simplified, manpower and material resources are saved, the possibility of errors caused by manually carrying out the setting of the fixed value can be fundamentally avoided, and the safety and the reliability of the operation and the action of the protection device are improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a block chain-based double-confirmation fixed value modification method for a relay protection device, which comprises the following steps:
establishing a protection information block chain network, regarding the regulation and control cloud platform as a full node in the block chain network, and regarding the protection device as a light node in the block chain network;
the fixed value template file is subjected to hash encryption to obtain a hash value of the fixed value template file, the hash value of the fixed value template file is stored in a block chain, and the one-to-one corresponding relation between the fixed value template file and the protection device is established;
uploading the constant value template file to a regulation cloud platform through a master station, calculating the hash value of the constant value template file at the side of the regulation cloud platform, comparing the hash value with the hash value of the constant value template file stored in a block chain to carry out consistency check, and carrying out setting calculation after the check is passed;
and carrying out Hash encryption on the complete constant value file generated after the whole constant value file is subjected to the fixed calculation, storing the Hash value in a block chain, simultaneously issuing the constant value file to a protection device, calculating the Hash value of the constant value file on the side of the protection device, comparing the Hash value of the constant value file with the Hash value of the constant value file stored in the block chain to carry out consistency check, and carrying out automatic setting and manual check after the check to complete double confirmation of remote constant value modification.
The second aspect of the present invention provides a double confirmation fixed value modification system for a relay protection device based on a block chain, including: the system comprises a regulation cloud platform, a protection device and a master station, wherein the regulation cloud platform, the protection device and the master station form a protection information block chain network, the regulation cloud platform is a full node in the block chain network, and the protection device is a light node in the block chain network;
the master station has the functions of online monitoring and centralized deployment control of secondary equipment and serves as a bridge for transmitting the constant value template file and the constant value file under a link between the protection device and the regulation cloud platform;
the protection device can be used for carrying out hash encryption on the constant value template file to obtain a hash value of the constant value template file, storing the hash value into the block chain, establishing a one-to-one corresponding relation between the constant value template file and the protection device, and uploading the constant value template file to the regulation and control cloud platform through the master station;
the control cloud platform can be used for calculating the hash value of the constant value template file and comparing the hash value with the hash value of the constant value template file stored in the block chain to carry out consistency check, and carrying out setting calculation after the check is passed; carrying out hash encryption on the complete fixed value file generated after the fixed calculation, storing the hash value in a block chain, and simultaneously issuing the fixed value file to a protection device;
the protection device can also be used for calculating the Hash value of the constant value file, comparing the Hash value with the Hash value of the constant value file stored in the block chain to carry out consistency check, and carrying out automatic setting and manual check after the check to finish double confirmation of remote constant value modification.
Compared with the prior art, the invention has the beneficial effects that:
(1) the method establishes a strict one-to-one corresponding relation between the constant value file and the protection device by means of the encryption anti-counterfeiting function of the block chain hash algorithm, fundamentally avoids the possibility of errors in the corresponding relation between the constant value file and the protection device, and improves the management reliability and the management efficiency of the constant value file.
(2) According to the method, the correctness of the constant value template file is checked on the regulation and control cloud platform by utilizing the encryption anti-counterfeiting function of the block chain hash algorithm, and the correctness of the constant value file is detected on the side of the protection device, so that the condition that the constant value template file and the constant value file are damaged or go wrong is found in time, and the safety and the reliability of the constant value setting of the protection device are further improved.
(3) The invention takes the hash value of the file as the identification information uplink, the file is 'authorized', 'anchored' and 'addressed' on the chain, the plaintext is transmitted under the chain and mutually verified with the chain, and the cost, the efficiency and the privacy safety are balanced.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic diagram of a block chain-based double confirmation fixed value modification method for a relay protection device according to an embodiment of the present invention;
fig. 2 is a flowchart of a regulation cloud platform side consistency check in a block chain-based relay protection device double confirmation fixed value modification method according to an embodiment of the present invention;
fig. 3 is a flowchart of protection device side consistency check in a block chain-based relay protection device double confirmation fixed value modification method according to an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example one
In order to solve the problems mentioned in the background art, an effective approach is to automatically adjust the protection device. The method comprises the steps of obtaining a fixed value template file from a protection device side, calculating a setting value for each protection device on a regulation cloud platform, generating a corresponding fixed value file, issuing the fixed value file to the corresponding protection device, and automatically completing fixed value setting work. Therefore, the working process of the constant value setting of the protection device can be greatly simplified, manpower and material resources are saved, the possibility of errors caused by manual constant value setting can be fundamentally avoided, and the safety and reliability of the operation and action of the protection device are improved.
Of course, there is a certain risk in using the automatic tuning method. For example, if the corresponding relationship between the constant value file and the protection device is wrong, the protection device will be set to the wrong constant value, and the consequences are very serious. In addition, the fixed value file may have errors or damages in the remote transmission process, which may also cause the fixed value setting error or automatic setting failure of the protection device, and bring great risk hidden trouble to the correct action of the protection device.
In order to improve the safety and reliability of the automatic setting of the fixed value of the protection device, the protection fixed value file must be efficiently and reliably managed, the correct corresponding relation between the fixed value file and the protection device is ensured, and the damaged fixed value template file or fixed value file can be automatically replaced. The invention adds a consistency checking method by means of a block chain network while confirming whether the setting of the fixed value is correct by means of the traditional manual work, thereby forming double confirmation.
Referring to fig. 1, a method for modifying a double confirmation fixed value of a relay protection device based on a block chain in this embodiment specifically includes the following steps:
step S101: and establishing a protection information block chain network, regarding the regulation and control cloud platform as a full node in the block chain network, and regarding the protection device as a light node in the block chain network.
The regulation cloud platform is regarded as a full node in the block chain network, and complete data of the block chain network are stored; the protection device terminal is regarded as a light node in the block chain network and stores data related to the protection device in the block chain network; all nodes have identification and addressing functions.
The block chain network has strong anti-tampering, anti-error characteristics and traceability, so that the information stored in the block chain can be ensured to be accurate; when the identification information needs to be acquired from the block chain network, the correctness of the information source can be ensured.
Step S102: and carrying out hash encryption on the constant value template file to obtain a hash value of the constant value template file, storing the hash value of the constant value template file into the block chain, and establishing a one-to-one corresponding relationship between the constant value template file and the protection device.
Specifically, the constant value template file generally includes device information, file information, and constant value list information. Device information includes, but is not limited to, the name of the protection device, the device model and software version number, the manufacturer, the time of commissioning the device, etc.; the file information includes but is not limited to the name of the protected primary equipment, a fixed value list number, a documentation date, transformer transformation ratio parameter setting and the like; the fixed value list information includes, but is not limited to, a fixed value area code, fixed value details including a fixed value name, a data type, a fixed value unit, a fixed value range, a modification step length and the like.
And the fixed value template file is correspondingly generated according to the respective fixed value content of the protection device.
The fixed value template file uses E file or XML file format, and the protection device outputs the fixed value template file in soft message mode.
The number of protection devices in a power grid is huge, and the protection devices relate to different manufacturers and brands, and even if the protection devices of the same manufacturer and brand are different in device model or software version, the content of a fixed value template file is different.
And calculating the content in the constant value template file by adopting an MD5 algorithm to obtain a group of 128-bit hash values. The constant value template file contents corresponding to different protection devices are not the same and have uniqueness; the MD5 algorithm can ensure that the hash value corresponding to each constant value template file is also unique. Therefore, the one-to-one corresponding relation between the value template file and the protection device is determined, and the point-to-point accurate transmission of the information is guaranteed.
According to a data transmission protocol of the block chain, after any block data is generated, the node generating the data is broadcasted to all other nodes in the whole network, so that the hash value of the constant value template file can be broadcasted to the regulation cloud platform node after being linked on the node of the protection device, and is stored in the regulation cloud platform node.
Step S103: uploading the constant value template file to a regulation cloud platform through a master station, calculating the hash value of the constant value template file at the side of the regulation cloud platform, comparing the hash value with the hash value of the constant value template file stored in the block chain to carry out consistency check, and carrying out setting calculation after the check is passed, as shown in fig. 2.
After the control cloud platform receives the constant value template file, calculating by using an encryption algorithm (such as an MD5 algorithm) which is the same as that of the protection device side to obtain a hash value of the constant value template file, comparing the hash value with the hash value stored in the block chain, and if the hash value is the same as that of the constant value template file, passing the consistency check; if the fixed value template file and the fixed value template file are different, the fixed value template file is wrong in the transmission process, the regulation and control cloud platform sends a request to the protection device side, and the fixed value template file is obtained from the protection device side again until the consistency is checked to be passed.
After the consistency is checked, calculating a fixed value for each protection device on a regulation cloud platform through setting calculation application, and filling a fixed value calculation result into a fixed value template file provided by the corresponding protection device to generate a complete fixed value file; and calculating the hash value again according to the content of the constant value file, and storing the hash value as the identifier of the constant value file in the block chain.
Similarly, according to the data propagation protocol of the blockchain, the hash value of the fixed-value file is broadcasted to the protection device node after the regulation cloud platform node uplinks, and is stored in the protection device node.
Step S104: and carrying out Hash encryption on the complete constant value file generated after the whole constant value file is subjected to the fixed calculation, storing the Hash value in a block chain, simultaneously issuing the constant value file to a protection device, calculating the Hash value of the constant value file on the side of the protection device, comparing the Hash value of the constant value file with the Hash value of the constant value file stored in the block chain to carry out consistency check, and carrying out automatic setting and manual check after the check to complete double confirmation of remote constant value modification, as shown in figure 3.
Specifically, in the process of performing consistency check on the protection device side, if the calculated hash value of the constant value file is consistent with the hash value of the constant value file stored in the block chain, it is indicated that the constant value file is correct, otherwise, it is determined that the constant value file is in error.
If the fixed value file is wrong, the protection device sends a fixed value file transmission request to the regulation and control cloud platform through the master station, the regulation and control cloud platform responds to the request of the protection device, the fixed value file is sent to the protection device again, and the consistency check of the fixed value file is carried out again until the fixed value file is correct.
The display of the protection device can also display the calculated hash value and the fixed value entry on site, so that the operator can conveniently view the hash value and the fixed value entry. After the protection device completes automatic setting, the fixed value list can be printed out through the local printer, so that operators can conveniently check and check the fixed value list on site, the fixed value is ensured to be accurate, and double confirmation of remote fixed value modification is finally completed.
Example two
The embodiment provides a relay protection device double confirmation fixed value modification system based on a block chain, which comprises: the system comprises a regulation cloud platform, a protection device and a master station, wherein the regulation cloud platform, the protection device and the master station form a protection information block chain network, the regulation cloud platform is a full node in the block chain network, and the protection device is a light node in the block chain network;
the master station has the functions of online monitoring and centralized deployment control of secondary equipment and serves as a bridge for transmitting the constant value template file and the constant value file under a link between the protection device and the regulation cloud platform;
the protection device can be used for carrying out hash encryption on the constant value template file to obtain a hash value of the constant value template file, storing the hash value into the block chain, establishing a one-to-one corresponding relation between the constant value template file and the protection device, and uploading the constant value template file to the regulation and control cloud platform through the master station;
the control cloud platform can be used for calculating the hash value of the constant value template file and comparing the hash value with the hash value of the constant value template file stored in the block chain to carry out consistency check, and carrying out setting calculation after the check is passed; carrying out hash encryption on the complete fixed value file generated after the fixed calculation, storing the hash value in a block chain, and simultaneously issuing the fixed value file to a protection device;
the protection device can also be used for calculating the Hash value of the constant value file, comparing the Hash value with the Hash value of the constant value file stored in the block chain to carry out consistency check, and carrying out automatic setting and manual check after the check to finish double confirmation of remote constant value modification.
In this embodiment, the fixed value template file is generated according to the respective fixed value content of the protection device.
Specifically, in the process of performing consistency check on the regulation cloud platform side, if the calculated hash value of the constant value template file is consistent with the hash value of the constant value template file stored in the block chain, it is indicated that the constant value template file is correct, otherwise, it is considered that the constant value template file is wrong.
If the fixed value template file is wrong, the regulation and control cloud platform sends a fixed value file transmission request to the protection device through the master station, the protection device responds to the request of the regulation and control cloud platform, the fixed value template file is uploaded to the regulation and control cloud platform again, and consistency check of the fixed value template file is carried out again until the fixed value template file is correct.
Specifically, in the process of performing consistency check on the protection device side, if the calculated hash value of the constant value file is consistent with the hash value of the constant value file stored in the block chain, it is indicated that the constant value file is correct, otherwise, it is determined that the constant value file is in error.
If the fixed value file is wrong, the protection device sends a fixed value file transmission request to the regulation and control cloud platform through the master station, the regulation and control cloud platform responds to the request of the protection device, the fixed value file is sent to the protection device again, and the consistency check of the fixed value file is carried out again until the fixed value file is correct.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A double-confirmation fixed value modification method of a relay protection device based on a block chain is characterized by comprising the following steps:
establishing a protection information block chain network, regarding the regulation and control cloud platform as a full node in the block chain network, and regarding the protection device as a light node in the block chain network;
the fixed value template file is subjected to hash encryption to obtain a hash value of the fixed value template file, the hash value of the fixed value template file is stored in a block chain, and the one-to-one corresponding relation between the fixed value template file and the protection device is established;
uploading the constant value template file to a regulation cloud platform through a master station, calculating the hash value of the constant value template file at the side of the regulation cloud platform, comparing the hash value with the hash value of the constant value template file stored in a block chain to carry out consistency check, and carrying out setting calculation after the check is passed;
and carrying out Hash encryption on the complete constant value file generated after the whole constant value file is subjected to the fixed calculation, storing the Hash value in a block chain, simultaneously issuing the constant value file to a protection device, calculating the Hash value of the constant value file on the side of the protection device, comparing the Hash value of the constant value file with the Hash value of the constant value file stored in the block chain to carry out consistency check, and carrying out automatic setting and manual check after the check to complete double confirmation of remote constant value modification.
2. The block chain-based relay protection device double confirmation fixed value modification method of claim 1, wherein the fixed value template file is correspondingly generated according to respective fixed value contents of the protection devices.
3. The block chain-based relay protection device double-confirmation fixed value modification method of claim 1, wherein in a process of performing consistency check on a regulation cloud platform side, if a hash value of a calculated fixed value template file is consistent with a hash value of a fixed value template file stored in a block chain in a comparison manner, it is indicated that the fixed value template file is correct, otherwise, it is considered that the fixed value template file is wrong.
4. The block chain-based relay protection device double-confirmation fixed-value modification method of claim 3, wherein if the fixed-value template file is wrong, the regulation cloud platform sends a fixed-value file transmission request to the protection device through the master station, the protection device responds to the request of the regulation cloud platform, the fixed-value template file is uploaded to the regulation cloud platform again, and consistency check of the fixed-value template file is performed again until the fixed-value template file is correct.
5. The block chain-based relay protection device double confirmation fixed value modification method according to claim 1, wherein in a process of performing consistency check on a protection device side, if a hash value of a calculated fixed value file is compared with hash values of fixed value files stored in a block chain, it is indicated that the fixed value file is correct, otherwise, it is considered that the fixed value file is in error.
6. The block chain-based relay protection device double-confirmation fixed value modification method of claim 5, wherein if the fixed value file is wrong, the protection device sends a fixed value file transmission request to the regulation cloud platform through the master station, the regulation cloud platform responds to the request of the protection device, the fixed value file is re-issued to the protection device, and consistency check of the fixed value file is performed again until the fixed value file is correct.
7. The block chain-based relay protection device double confirmation fixed value modification method according to claim 1, wherein all nodes in the block chain network have identification, verification and addressing checking functions.
8. The block chain-based relay protection device double-confirmation fixed value modification method of claim 1, wherein the fixed value template file uses an E file or XML file format, and the protection device outputs the fixed value template file in a soft message manner.
9. A relay protection device double-confirmation fixed value modification system based on a block chain is characterized by comprising: the system comprises a regulation cloud platform, a protection device and a master station, wherein the regulation cloud platform, the protection device and the master station form a protection information block chain network, the regulation cloud platform is a full node in the block chain network, and the protection device is a light node in the block chain network;
the master station has the functions of online monitoring and centralized deployment control of secondary equipment and serves as a bridge for transmitting the constant value template file and the constant value file under a link between the protection device and the regulation cloud platform;
the protection device can be used for carrying out hash encryption on the constant value template file to obtain a hash value of the constant value template file, storing the hash value into the block chain, establishing a one-to-one corresponding relation between the constant value template file and the protection device, and uploading the constant value template file to the regulation and control cloud platform through the master station;
the control cloud platform can be used for calculating the hash value of the constant value template file and comparing the hash value with the hash value of the constant value template file stored in the block chain to carry out consistency check, and carrying out setting calculation after the check is passed; carrying out hash encryption on the complete fixed value file generated after the fixed calculation, storing the hash value in a block chain, and simultaneously issuing the fixed value file to a protection device;
the protection device can also be used for calculating the Hash value of the constant value file, comparing the Hash value with the Hash value of the constant value file stored in the block chain to carry out consistency check, and carrying out automatic setting and manual check after the check to finish double confirmation of remote constant value modification.
10. The block chain-based relay protection device double confirmation fixed value modification system of claim 9, wherein the fixed value template file is generated correspondingly according to respective fixed value contents of the protection devices.
CN202111480595.1A 2021-12-06 2021-12-06 Block chain-based double-confirmation fixed value modification method and system for relay protection device Pending CN114169001A (en)

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CN202111480595.1A CN114169001A (en) 2021-12-06 2021-12-06 Block chain-based double-confirmation fixed value modification method and system for relay protection device

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Application Number Priority Date Filing Date Title
CN202111480595.1A CN114169001A (en) 2021-12-06 2021-12-06 Block chain-based double-confirmation fixed value modification method and system for relay protection device

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