Power transmission high-safety multi-hop network based on wapi technology

Abstract

The invention discloses a power transmission high-security multi-hop network based on a wapi technology, which relates to the field of multi-stage data encryption transmission and comprises a secret key generation module, a data acquisition module, a multi-stage transmission node analysis module and a multi-stage encryption transmission module, by effectively analyzing the encrypted data of the last data transmission time period received by the power control center and intelligently analyzing and selecting the power transmission nodes at all levels, the randomness of power transmission node selection is enhanced, the difficulty of intrusion locking of the power transmission nodes is indirectly increased, and the safety of the power transmission nodes is improved. The secret key generator is used for creating the continuous secret keys, and the high-randomness secret keys are obtained through random matching and data processing, so that the probability of secret key leakage is indirectly reduced, the security and credibility of power transmission data encryption transmission are effectively improved, and the development and construction of a power system are guaranteed.

Description

Technical Field

[0001] The present application relates to the field of multi-level data encryption transmission, and in particular to a high-security multi-hop network for power transmission based on WAPI technology. Background Art

[0002] As a key component of the power system, the reliability and stability of transmission lines are of vital importance. With the advancement of smart grid construction, the monitoring requirements for transmission lines are getting higher and higher, including system availability, stability, safety, robustness, and autonomous controllability. Therefore, the research on communication technologies and solutions suitable for transmission line information transmission has important strategic significance and practical value. However, the existing technologies still have the following shortcomings: Existing technologies usually use fixed data transmission paths and fixed encryption modes when encrypting power transmission data, which indirectly increases the probability of data being intercepted and cracked, reduces the security and reliability of data encryption transmission, and is not conducive to the development and construction of power systems. Summary of the invention

[0003] An object of the present invention is to provide a wireless communication method using a control channel between wireless communication devices to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a high-security multi-hop network for power transmission based on WAPI technology, comprising: Key generation module: used to create a key set for each power transmission device; Data acquisition module: used to acquire the data to be transmitted of each power transmission device, and obtain the data set to be encrypted of each power transmission device; Multi-level transmission node analysis module: used to analyze the encrypted data received by the power control center to obtain the transmission node information corresponding to each transmission device; A multi-level encrypted transmission module is used to analyze and control the transmission node information corresponding to each power transmission device, realize encrypted transmission of the data set to be encrypted of each power transmission device, and obtain the multi-level encrypted transmission results of each power transmission device.

[0005] In the preferred embodiment of this scheme, the specific implementation method of the key generation module is as follows: By using a key generator at a WAPI terminal of each power transmission device to create a continuous key, a key set corresponding to each power transmission device is obtained, wherein the key set includes each key corresponding to each power transmission device and a time point corresponding to each key.

[0006] In a preferred embodiment of this scheme, the specific implementation method of the data acquisition module is as follows: Obtain monitoring data of each type of monitoring equipment in each power transmission equipment at each time point and the data volume of the monitoring data at each time point; Obtaining the number of control instructions for each power transmission device at each time point and the data volume of the control instructions at each time point; Acquire the communication data of each power transmission device corresponding to each time point and the data volume of the communication data at each time point; Obtain the standard data transmission time interval preset by the power control center, and statistically calculate and obtain the total amount of monitoring data, the total amount of control instruction data, and the total amount of communication data within the standard data transmission time period; According to the monitoring data of the power transmission equipment corresponding to each time point in the standard data transmission time period, the total amount of monitoring data, the number of control instructions, the total amount of control instruction data, the communication data and the total amount of communication data, a set of data to be encrypted for each power transmission equipment is established.

[0007] In a preferred embodiment of this solution, the specific implementation of the multi-level transmission node analysis module is as follows: The encrypted data and device number transmitted by each highest-level transmission node are received through the encrypted data receiving port of the power control center, and the key information of each power transmission device is received through the corresponding key receiving port of the power control center; The key information includes the number and key of each power transmission device; The encrypted data and device number transmitted by each highest-level transmission node are parsed through the number and secret key of each transmission device received by the power control center to obtain the encrypted data set corresponding to each transmission device; Extract information from the encrypted data set corresponding to each power transmission device to obtain the monitoring data corresponding to each power transmission device, the total amount of monitoring data, the number of control instructions, the total amount of control instruction data, the communication data and the total amount of communication data data. The detection data includes the operating status parameters and network quality parameters of the power transmission device, wherein the network quality parameters include the network signal strength change curve and the data transmission rate change curve within the standard data transmission time period, the operating status parameters include the current change curve, the voltage change curve and the power change curve within the standard data transmission time period, and the communication data refers to the data interaction frequency; Establishing a data extraction relationship between the multi-level transmission node analysis module and the database, extracting the standard network quality parameters and standard operating status parameters corresponding to each transmission device stored in the database; Compare the operating status parameters and network quality parameters of each power transmission device with the standard network quality parameters and standard operating status parameters corresponding to each power transmission device to obtain the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate and data transmission rate compliance rate corresponding to each power transmission device; By calculating the formula , calculate the first node selection coefficient corresponding to each transmission equipment ; By calculation formula: , calculate and obtain the comprehensive transmission node selection coefficient corresponding to each transmission equipment ,in Indicates the number corresponding to each transmission equipment, , , , , They are respectively represented by the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate and data transmission rate compliance rate of each transmission equipment. It is expressed as the total amount of monitoring data corresponding to each transmission equipment. , They are respectively represented by the number of control instructions corresponding to each power transmission device and the total amount of control instruction data. , They are respectively represented by the data interaction frequency and the total amount of communication data corresponding to each transmission device, , They are respectively represented by the preset operating status parameter influence weight and network quality parameter influence weight, , It is represented by the preset control instruction influence weight and communication data influence weight.

[0008] Extracting the comprehensive transmission node selection coefficient intervals corresponding to the transmission nodes at all levels stored in the database, screening the comprehensive transmission node selection coefficients corresponding to the transmission equipment according to the comprehensive transmission node selection coefficient intervals corresponding to the transmission nodes at all levels, and obtaining the transmission equipment corresponding to the transmission nodes at all levels; Extracting geographical location information corresponding to each power transmission device stored in the database, wherein the geographical location information includes the straight-line distance between each power transmission device and each adjacent power transmission device, and obtaining the straight-line distance between each upper power transmission node and each lower power transmission node according to each power transmission device corresponding to each transmission node at each level; A preliminary division is performed according to a preset distance interval to obtain the lower-level transmission nodes corresponding to the upper-level transmission nodes. If there is a lower-level transmission node corresponding to multiple upper-level transmission nodes, the transmission node is classified into the upper-level transmission node corresponding to the maximum comprehensive transmission node selection coefficient. If there is an undivided lower-level transmission node, the lower-level transmission node is classified into the upper-level transmission node with the nearest distance. The transmission node level corresponding to each transmission device, the upper-level transmission node corresponding to each transmission device, and each lower-level transmission node are recorded as the transmission node information corresponding to each transmission device.

[0009] In the preferred embodiment of this scheme, the specific implementation method of the multi-level encryption transmission module is as follows: The transmission node information corresponding to each transmission device is transmitted through the data transmission port of the power control center; Each power transmission device receives the transmission node information corresponding to each power transmission device through the data receiving port; Generate a random number set through a strong random number generator, match the time point corresponding to each key with any random number in the random number set, record the random number corresponding to the time point corresponding to each key as the number of the time point corresponding to each key, and screen to obtain the number corresponding to each key. Generate a series of random numbers using a strong random number generator, calculate the mean value corresponding to the series of random numbers, and record the random number with the smallest difference from the mean value corresponding to the series of random numbers as the target random number; Match the target random number with the number corresponding to each secret key, calculate the difference between the target random number and the number corresponding to each secret key, select the secret key corresponding to the number with the smallest difference, and record it as the secret key corresponding to the power transmission device; Encrypt the data set to be encrypted corresponding to the power transmission device using the secret key corresponding to the power transmission device to obtain the encrypted data corresponding to the power transmission device, transmit the secret key to the power control center through the secret key transmission port of the power transmission device, and transmit the encrypted data and device number corresponding to the power transmission device to the upper-level power transmission node corresponding to the power transmission device through the encrypted data transmission port of the power transmission device; The upper-level transmission node receives the encrypted data and data numbers corresponding to each lower-level transmission node through the encrypted data receiving port, encrypts its own data set to be encrypted and the received encrypted data and data numbers of each lower-level transmission node through the secret key corresponding to the upper-level transmission node, transmits the encrypted data and device number corresponding to the upper-level transmission node to the upper-level transmission node corresponding to the upper-level transmission node through the encrypted data transmission port corresponding to the upper-level transmission node, until the encrypted data receiving port of the power control center receives the encrypted data and device numbers transmitted by each highest-level transmission node, and the encrypted data and device numbers transmitted by each highest-level transmission node received by the encrypted data receiving port of the power control center are recorded as the multi-level encryption transmission result of each transmission device.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The present invention effectively analyzes the encrypted data of the last data transmission time period received by the power control center, and intelligently analyzes and selects transmission nodes at all levels, thereby enhancing the randomness of transmission node selection, indirectly increasing the difficulty of transmission nodes being invaded and locked, and improving the effectiveness and reliability of encrypted transmission of transmission data; The present invention creates continuous keys by using a key generator and obtains highly random keys through random matching and data processing, thereby indirectly reducing the probability of key leakage, effectively improving the security and verifiability of encrypted transmission of power transmission data, and being beneficial to ensuring the development and construction of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0012] Figure 1 This is a schematic diagram of module connection according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1 , the present invention provides a high-security multi-hop network for power transmission based on wapi technology, including a key generation module, a data acquisition module, a multi-level transmission node analysis module and a multi-level encryption transmission module; The secret key generation module is connected to the multi-level encryption transmission module, the data acquisition module is connected to the multi-level transmission node analysis module, and the multi-level transmission node analysis module is connected to the multi-level encryption transmission module.

[0015] The key generation module is used to create a key set for each power transmission device; Furthermore, the specific implementation of the key generation module is as follows: By using a key generator at a WAPI terminal of each power transmission device to create a continuous key, a key set corresponding to each power transmission device is obtained, wherein the key set includes each key corresponding to each power transmission device and a time point corresponding to each key.

[0016] The data acquisition module is used to acquire the data to be transmitted of each power transmission device to obtain a set of data to be encrypted of each power transmission device; Furthermore, the specific execution mode of the data acquisition module is as follows: Obtain monitoring data of each type of monitoring equipment in each power transmission equipment at each time point and the data volume of the monitoring data at each time point; Obtaining the number of control instructions for each power transmission device at each time point and the data volume of the control instructions at each time point; Acquire the communication data of each power transmission device corresponding to each time point and the data volume of the communication data at each time point; Obtain the standard data transmission time interval preset by the power control center, and statistically calculate and obtain the total amount of monitoring data, the total amount of control instruction data, and the total amount of communication data within the standard data transmission time period; According to the monitoring data of the power transmission equipment corresponding to each time point in the standard data transmission time period, the total amount of monitoring data, the number of control instructions, the total amount of control instruction data, the communication data and the total amount of communication data, a set of data to be encrypted for each power transmission equipment is established. The multi-level transmission node analysis module is used to analyze the encrypted data received by the power control center to obtain the transmission node information corresponding to each transmission device; Furthermore, the specific implementation of the multi-level transmission node analysis module is as follows: The encrypted data and device number transmitted by each highest-level transmission node are received through the encrypted data receiving port of the power control center, and the key information of each power transmission device is received through the corresponding key receiving port of the power control center; The key information includes the number and key of each power transmission device; The encrypted data and device number transmitted by each highest-level transmission node are parsed through the number and secret key of each transmission device received by the power control center to obtain the encrypted data set corresponding to each transmission device; Extract information from the encrypted data set corresponding to each power transmission device to obtain the monitoring data corresponding to each power transmission device, the total amount of monitoring data, the number of control instructions, the total amount of control instruction data, the communication data and the total amount of communication data data. The detection data includes the operating status parameters and network quality parameters of the power transmission device, wherein the network quality parameters include the network signal strength change curve and the data transmission rate change curve within the standard data transmission time period, the operating status parameters include the current change curve, the voltage change curve and the power change curve within the standard data transmission time period, and the communication data refers to the data interaction frequency; Establishing a data extraction relationship between the multi-level transmission node analysis module and the database, extracting the standard network quality parameters and standard operating status parameters corresponding to each transmission device stored in the database; Compare the operating status parameters and network quality parameters of each power transmission device with the standard network quality parameters and standard operating status parameters corresponding to each power transmission device to obtain the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate and data transmission rate compliance rate corresponding to each power transmission device; By calculating the formula , calculate the first node selection coefficient corresponding to each transmission equipment ; By calculation formula: , calculate and obtain the comprehensive transmission node selection coefficient corresponding to each transmission equipment ,in Indicates the number corresponding to each transmission equipment, , , , , They are respectively represented by the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate and data transmission rate compliance rate of each transmission equipment. It is expressed as the total amount of monitoring data corresponding to each transmission equipment. , They are respectively represented by the number of control instructions corresponding to each power transmission device and the total amount of control instruction data. , They are respectively represented by the data interaction frequency and the total amount of communication data corresponding to each transmission device, , They are respectively represented by the preset operating status parameter influence weight and network quality parameter influence weight, , It is represented by the preset control instruction influence weight and communication data influence weight.

[0017] Extracting the comprehensive transmission node selection coefficient intervals corresponding to the transmission nodes at all levels stored in the database, screening the comprehensive transmission node selection coefficients corresponding to the transmission equipment according to the comprehensive transmission node selection coefficient intervals corresponding to the transmission nodes at all levels, and obtaining the transmission equipment corresponding to the transmission nodes at all levels; Extracting geographical location information corresponding to each power transmission device stored in the database, wherein the geographical location information includes the straight-line distance between each power transmission device and each adjacent power transmission device, and obtaining the straight-line distance between each upper power transmission node and each lower power transmission node according to each power transmission device corresponding to each transmission node at each level; A preliminary division is performed according to a preset distance interval to obtain the lower-level transmission nodes corresponding to the upper-level transmission nodes. If there is a lower-level transmission node corresponding to multiple upper-level transmission nodes, the transmission node is classified into the upper-level transmission node corresponding to the maximum comprehensive transmission node selection coefficient. If there is an undivided lower-level transmission node, the lower-level transmission node is classified into the upper-level transmission node with the nearest distance. The transmission node level corresponding to each transmission device, the upper-level transmission node corresponding to each transmission device, and each lower-level transmission node are recorded as the transmission node information corresponding to each transmission device.

[0018] The multi-level encrypted transmission module is used to analyze and control the transmission node information corresponding to each power transmission device, realize encrypted transmission of the data set to be encrypted of each power transmission device, and obtain the multi-level encrypted transmission results of each power transmission device.

[0019] Furthermore, the specific implementation of the multi-level encryption transmission module is as follows: The transmission node information corresponding to each transmission device is transmitted through the data transmission port of the power control center; Each power transmission device receives the transmission node information corresponding to each power transmission device through the data receiving port; Generate a random number set through a strong random number generator, match the time point corresponding to each key with any random number in the random number set, record the random number corresponding to the time point corresponding to each key as the number of the time point corresponding to each key, and screen to obtain the number corresponding to each key. Generate a series of random numbers using a strong random number generator, calculate the mean value corresponding to the series of random numbers, and record the random number with the smallest difference from the mean value corresponding to the series of random numbers as the target random number; Match the target random number with the number corresponding to each secret key, calculate the difference between the target random number and the number corresponding to each secret key, select the secret key corresponding to the number with the smallest difference, and record it as the secret key corresponding to the power transmission device; Encrypt the data set to be encrypted corresponding to the power transmission device using the secret key corresponding to the power transmission device to obtain the encrypted data corresponding to the power transmission device, transmit the secret key to the power control center through the secret key transmission port of the power transmission device, and transmit the encrypted data and device number corresponding to the power transmission device to the upper-level power transmission node corresponding to the power transmission device through the encrypted data transmission port of the power transmission device; The upper-level transmission node receives the encrypted data and data numbers corresponding to each lower-level transmission node through the encrypted data receiving port, encrypts its own data set to be encrypted and the received encrypted data and data numbers of each lower-level transmission node through the secret key corresponding to the upper-level transmission node, transmits the encrypted data and device number corresponding to the upper-level transmission node to the upper-level transmission node corresponding to the upper-level transmission node through the encrypted data transmission port corresponding to the upper-level transmission node, until the encrypted data receiving port of the power control center receives the encrypted data and device numbers transmitted by each highest-level transmission node, and the encrypted data and device numbers transmitted by each highest-level transmission node received by the encrypted data receiving port of the power control center are recorded as the multi-level encryption transmission result of each transmission device.

[0020] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-security multi-hop network for power transmission based on WAPI technology, characterized by: include: Key generation module: used to create a key set for each power transmission device; Data acquisition module: used to acquire the data to be transmitted of each power transmission device, and obtain the data set to be encrypted of each power transmission device; Multi-level transmission node analysis module: used to analyze the encrypted data received by the power control center to obtain the transmission node information corresponding to each transmission device; Multi-level encrypted transmission module; It is used to analyze and control the transmission node information corresponding to each power transmission device, realize encrypted transmission of the data set to be encrypted of each power transmission device, and obtain multi-level encrypted transmission results of each power transmission device.

2. According to claim 1, a high-security multi-hop network for power transmission based on wapi technology is characterized by: The specific implementation method of the key generation module is as follows: By using a key generator at a WAPI terminal of each power transmission device to create a continuous key, a key set corresponding to each power transmission device is obtained, wherein the key set includes each key corresponding to each power transmission device and a time point corresponding to each key.

3. According to claim 1, a high-security multi-hop network for power transmission based on wapi technology is characterized by: The specific implementation method of the data acquisition module is as follows: Obtain monitoring data of each type of monitoring equipment in each power transmission equipment at each time point and the data volume of the monitoring data at each time point; Obtain the number of control instructions for each power transmission device at each time point and the data volume of the control instructions at each time point; Acquire the communication data of each power transmission device corresponding to each time point and the data volume of the communication data at each time point; Obtain the standard data transmission time interval preset by the power control center, and statistically calculate and obtain the total amount of monitoring data, the total amount of control instruction data, and the total amount of communication data within the standard data transmission time period; According to the monitoring data of the power transmission equipment corresponding to each time point in the standard data transmission time period, the total amount of monitoring data, the number of control instructions, the total amount of control instruction data, the communication data and the total amount of communication data, a set of data to be encrypted for each power transmission equipment is established.

4. According to claim 1, a high-security multi-hop network for power transmission based on wapi technology is characterized by: The specific implementation method of the multi-level transmission node analysis module is as follows: The encrypted data and device number transmitted by each highest-level transmission node are received through the encrypted data receiving port of the power control center, and the key information of each power transmission device is received through the corresponding key receiving port of the power control center; The key information includes the number and key of each power transmission device; The encrypted data and device number transmitted by each highest-level transmission node are parsed through the number and secret key of each transmission device received by the power control center to obtain the encrypted data set corresponding to each transmission device; Extract information from the encrypted data set corresponding to each power transmission device to obtain the monitoring data corresponding to each power transmission device, the total amount of monitoring data, the number of control instructions, the total amount of control instruction data, the communication data and the total amount of communication data data. The detection data includes the operating status parameters and network quality parameters of the power transmission device, wherein the network quality parameters include the network signal strength change curve and the data transmission rate change curve within the standard data transmission time period, the operating status parameters include the current change curve, the voltage change curve and the power change curve within the standard data transmission time period, and the communication data refers to the data interaction frequency; Establishing a data extraction relationship between the multi-level transmission node analysis module and the database, extracting the standard network quality parameters and standard operating status parameters corresponding to each transmission device stored in the database; Compare the operating status parameters and network quality parameters of each power transmission device with the standard network quality parameters and standard operating status parameters corresponding to each power transmission device to obtain the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate and data transmission rate compliance rate corresponding to each power transmission device; By calculating the formula , calculate the first node selection coefficient corresponding to each transmission equipment ; By calculation formula: , calculate and obtain the comprehensive transmission node selection coefficient corresponding to each transmission equipment ,in Indicates the number corresponding to each transmission equipment, , , , , They are respectively represented by the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate and data transmission rate compliance rate of each transmission equipment. It is expressed as the total amount of monitoring data corresponding to each transmission equipment. , They are respectively represented by the number of control instructions corresponding to each power transmission device and the total amount of control instruction data. , They are respectively represented by the data interaction frequency and the total amount of communication data corresponding to each transmission device, , They are respectively represented as the preset operating status parameter influence weight and network quality parameter influence weight, , It is represented by the preset control instruction influence weight and communication data influence weight, Indicates the number of each transmission equipment. Extracting the comprehensive transmission node selection coefficient intervals corresponding to the transmission nodes at all levels stored in the database, screening the comprehensive transmission node selection coefficients corresponding to the transmission equipment according to the comprehensive transmission node selection coefficient intervals corresponding to the transmission nodes at all levels, and obtaining the transmission equipment corresponding to the transmission nodes at all levels; Extracting geographical location information corresponding to each power transmission device stored in the database, wherein the geographical location information includes the straight-line distance between each power transmission device and each adjacent power transmission device, and obtaining the straight-line distance between each upper power transmission node and each lower power transmission node according to each power transmission device corresponding to each transmission node at each level; A preliminary division is performed according to a preset distance interval to obtain the lower-level transmission nodes corresponding to the upper-level transmission nodes. If there is a lower-level transmission node corresponding to multiple upper-level transmission nodes, the transmission node is classified into the upper-level transmission node corresponding to the maximum comprehensive transmission node selection coefficient. If there is an undivided lower-level transmission node, the lower-level transmission node is classified into the upper-level transmission node with the nearest distance. The transmission node level corresponding to each transmission device, the upper-level transmission node corresponding to each transmission device, and each lower-level transmission node are recorded as the transmission node information corresponding to each transmission device.

5. According to claim 4, a high-security multi-hop network for power transmission based on wapi technology is characterized by: The specific implementation method of the multi-level encryption transmission module is as follows: The transmission node information corresponding to each transmission device is transmitted through the data transmission port of the power control center; Each power transmission device receives the transmission node information corresponding to each power transmission device through the data receiving port; Generate a random number set through a strong random number generator, match the time point corresponding to each key with any random number in the random number set, record the random number corresponding to the time point corresponding to each key as the number of the time point corresponding to each key, and screen to obtain the number corresponding to each key. Generate a series of random numbers using a strong random number generator, calculate the mean value corresponding to the series of random numbers, and record the random number with the smallest difference from the mean value corresponding to the series of random numbers as the target random number; Match the target random number with the number corresponding to each secret key, calculate the difference between the target random number and the number corresponding to each secret key, select the secret key corresponding to the number with the smallest difference, and record it as the secret key corresponding to the power transmission device; Encrypt the data set to be encrypted corresponding to the power transmission device using the secret key corresponding to the power transmission device to obtain the encrypted data corresponding to the power transmission device, transmit the secret key to the power control center through the secret key transmission port of the power transmission device, and transmit the encrypted data and device number corresponding to the power transmission device to the upper-level power transmission node corresponding to the power transmission device through the encrypted data transmission port of the power transmission device; The upper-level transmission node receives the encrypted data and data numbers corresponding to each lower-level transmission node through the encrypted data receiving port, encrypts its own data set to be encrypted and the received encrypted data and data numbers of each lower-level transmission node through the secret key corresponding to the upper-level transmission node, transmits the encrypted data and device number corresponding to the upper-level transmission node to the upper-level transmission node corresponding to the upper-level transmission node through the encrypted data transmission port corresponding to the upper-level transmission node, until the encrypted data receiving port of the power control center receives the encrypted data and device numbers transmitted by each highest-level transmission node, and the encrypted data and device numbers transmitted by each highest-level transmission node received by the encrypted data receiving port of the power control center are recorded as the multi-level encryption transmission result of each transmission device.

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