A real-time monitoring system for electrical fire-proof current-limiting protectors

Abstract

The present invention discloses a real-time monitoring system for an electrical fire-proof current-limiting protector, and relates to the technical field of current-limiting protectors. The present invention includes a plurality of monitoring units and a mobile terminal, each monitoring unit has an independent number, the number of monitoring units corresponds to the number of electrical fire-proof current-limiting protectors, the monitoring unit includes an acquisition module, a clock module, an analysis module, a recording module, a key management module and a wireless module, the output end of the acquisition module is connected to the input end of the analysis module, the acquisition module is used to obtain the specification parameters, load information and protection records of the electrical fire-proof current-limiting protector and transmit them to the analysis module, the present invention automatically generates an optimization strategy for the mobile terminal to read by analyzing the matching index between the protector and the circuit after installation, so that the electrical fire-proof current-limiting protector can better adapt to the circuit, and multiple monitoring units communicate with each other to exchange encrypted data, so as to ensure the security of the data.

Description

Technical Field

[0001] The invention relates to the technical field of current limiting protectors, in particular to a real-time monitoring system for electrical fire-proof current limiting protectors. Background Art

[0002] An electrical fire-proof current-limiting protector is a device used for short-circuit arc extinguishing protection and overload protection in low-voltage distribution lines. Its core component is a solid-state switch. Unlike traditional air switches, the disconnection of solid-state switches is achieved by relying on the movement of carriers inside the semiconductor. The disconnection time is in microseconds, the speed is fast, and no arc is generated. When a short-circuit fault occurs, the electrical fire-proof current-limiting protector can instantly cut off the short-circuit current when the current rises compared to traditional air switches. The energy released during a short circuit is smaller, thereby avoiding the generation of arcs and reducing the risk of electrical fires. They can effectively overcome the shortcomings of traditional circuit breakers, air switches and monitoring equipment, such as large short-circuit current, long short-circuit current cut-off time, large arc sparks generated during short circuits, and short service life. They are widely used in the line protection of terminal trunk and branch lines in various power consumption places.

[0003] The early installation and later operation and maintenance of existing electrical fire-proof and current-limiting protectors are not performed by the same group, and there is a certain time difference before installation and after use. The installers cannot predict the operators' electricity usage habits and circuit load conditions, and the matching degree between the electrical fire-proof and current-limiting protectors and the connected circuits after use cannot be fed back to the operators of the early installation. Therefore, there is a widespread problem that the electrical fire-proof and current-limiting protectors are not compatible with the connected circuits. At the same time, the existing electrical fire-proof and current-limiting protectors do not have reliable data protection and encryption functions. Therefore, it is a technical problem that technical personnel in this field need to solve to improve the data protection and encryption functions of the electrical fire-proof and current-limiting protectors, recalculate the matching degree after the protector is installed and operated, and automatically generate optimization strategies for the operators. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a real-time monitoring system for an electrical fire-proof current-limiting protector, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: a real-time monitoring system for an electrical fire-proof current-limiting protector, comprising a plurality of monitoring units and a mobile terminal, each of the monitoring units having an independent number, the number of the monitoring units corresponding to the number of the electrical fire-proof current-limiting protectors, the monitoring units comprising an acquisition module, a clock module, an analysis module, a recording module, a key management module and a wireless module, the output end of the acquisition module is connected to the input end of the analysis module, the acquisition module is used to obtain specification parameters, load information and protection records of the electrical fire-proof current-limiting protector and transmit them to the analysis module, the analysis module analyzes the specification parameters, load information and protection records to obtain a matching index of the monitoring unit, the analysis module establishes a data connection with the recording module, the analysis module saves the specification parameters, load information, protection records and matching index to the recording module, and the matching index includes a first matching index and a second matching index;

[0006] The monitoring unit number is stored in the recording module, the recording module stores computer programs or instructions for the analysis module to execute, the recording module also stores a public key library and a private key library for data encryption, the recording module stores the monitoring unit number, the public key in the public key library is used for encryption, and the private key in the private key library is used for decryption, the output end of the clock module is connected to the input end of the recording module, the output end of the recording module is connected to the input end of the key management module, the time change of the clock module of the recording module synchronously changes the public key in the public key library and the private key in the private key library and transmits them to the key management module, and the public key and the private key change once every minute;

[0007] The clock module establishes a data connection with the analysis module, and the clock module is used to calibrate the time difference between each monitoring unit;

[0008] The key management module establishes a data connection with the analysis module, the analysis module reads the monitoring unit number from the recording module, the analysis module transmits the monitoring unit number and the matching index to the key management module, the key management module uses the public key to encrypt the monitoring unit number and the matching index to obtain a ciphertext, each monitoring unit exchanges ciphertexts through a wireless module and transmits the ciphertexts to the key management module, the key management module uses the private key to decrypt the ciphertext to obtain the monitoring unit number and the matching index corresponding to the number, the key management module transmits the monitoring unit number and the matching index corresponding to the number to the analysis module, and the analysis module transfers the monitoring unit number and the matching index corresponding to the number to the recording module;

[0009] The mobile terminal establishes a data connection with the key management module through the wireless module, the mobile terminal sends a data request to the analysis module through the wireless module and the key management module, and the analysis module transmits the optimization strategy to the mobile terminal through the key management module and the wireless module in turn;

[0010] Calculating a first matching index of the monitoring unit, the acquisition module acquires specification parameters of the electrical fire-proof current-limiting protector, load information of the connected circuit and protection records and transmits them to the analysis module, and the execution matching calculation program obtains a first matching index of the monitoring unit, the first matching index represents the degree of adaptation of the electrical fire-proof current-limiting protector to the connected circuit;

[0011] The specifications include rated current , protection current , Cut off time And detection range , the load information includes the average current of the connected circuit , the maximum current of the connected circuit and the current fluctuation rate of the connected circuit , the protection record includes the number of fault events , mean troubleshooting time and runtime ;

[0012] Ciphertext exchange: the analysis module executes the time calibration procedure, the key management module encrypts the specification parameters, load information and protection records into ciphertext, each monitoring unit exchanges ciphertext through the wireless module, and the key management module decrypts the ciphertext to obtain the specification parameters, load information and protection records of other electrical fire-proof current-limiting protectors;

[0013] Calculating a second matching index of the monitoring unit, the analysis module executing a matching calculation program to obtain a second matching index of the monitoring unit, the second matching index representing the degree of compatibility between the electrical fire-proof current-limiting protector and other circuits;

[0014] Generate an optimization strategy, the analysis module generates a replacement plan according to the first index and the second index, the monitoring unit obtains the optimization strategy by analyzing the matching index, and all monitoring units transmit the optimization strategy to each other through the wireless module until each monitoring unit obtains the optimization strategy;

[0015] The mobile terminal sends a data request to any monitoring unit analysis module through the wireless module and the key management module in turn, and the analysis module sends the optimization strategy to the mobile terminal through the key management module and the wireless module in turn.

[0016] Furthermore, the matching calculation program specifically includes:

[0017] Calculating Current Index The analysis module is based on the formula Calculate the current load index The analysis module is based on the formula Calculate the load protection index The analysis module is based on the formula Calculate the current index ;

[0018] Calculate safety index The analysis module is based on the formula Calculate the safety index , where k is the preset threshold, according to the formula Determine a specific value of the preset threshold k;

[0019] Calculation precision index The analysis module is based on the formula Calculate the precision index ;

[0020] Calculate the running index The analysis module is based on the formula Calculate the running index , running index The percentage of trouble-free operation time of electrical fire-proof current-limiting protectors;

[0021] To calculate the matching index, the analysis module uses the formula The matching index of the monitoring unit is calculated. The first matching index and the second matching index are both applicable to this formula, where They are all weight coefficients, and their specific values ​​are determined based on the actual internal circuit layout of the electrical cabinet.

[0022] Furthermore, the time calibration procedure specifically includes:

[0023] Establishing a topological network, the analysis module obtains time information from the clock module and transmits the time information and the monitoring unit number to the key management module, and the key management module establishes a data connection with other adjacent monitoring unit key management modules within the communication range of the wireless module through the wireless module;

[0024] Unencrypted data exchange, the key management module transmits the time information and monitoring unit number to the key management module of the adjacent monitoring unit in a broadcasting manner, the key management module saves the received time information and monitoring unit number and forwards it to the key management modules of other adjacent monitoring units, when the monitoring unit number received by the key management module is repeated, the key management module stops forwarding the repeated monitoring unit number and the time information corresponding to the number;

[0025] The key management module transmits all the collected time information and monitoring unit numbers to the analysis module, and the analysis module establishes a time distribution graph, with the horizontal axis being time in seconds and the vertical axis being quantity in units. The analysis module imports all the time information into the time distribution graph to obtain a time distribution curve, and the analysis module divides the time distribution curve into segments at preset fixed time intervals. The analysis module calculates the average value of each segmented time distribution curve, and takes the midpoint of the time period corresponding to the time distribution curve with the highest average value as the reference time;

[0026] The analysis module calculates the time difference between the time information corresponding to each monitoring unit number and the reference time, and the analysis module binds the time difference with the monitoring unit number and transmits it to the key management module, and the key management module performs another unencrypted data exchange, and the exchanged data is the monitoring unit number and the corresponding time difference;

[0027] The key management module transmits all received monitoring unit numbers and corresponding time differences to the analysis module, and the analysis module retrieves the time difference corresponding to its own monitoring unit number and transmits it to the clock module, and the clock module calibrates its own time according to the time difference.

[0028] Furthermore, the encryption and decryption process of the ciphertext specifically includes:

[0029] Retrieving the public key and the private key, the analysis module retrieves the time information from the clock module and transmits it to the key management module, the analysis module retrieves the monitoring unit number, specification parameters, load information and protection record from the recording module and transmits them to the key management module, the key management module reads the public key and the private key corresponding to the time information from the public key library and the private key library of the recording module according to the time information, and the key management module uses the public key to encrypt the monitoring unit number, specification parameters, load information and protection record to obtain a ciphertext;

[0030] Encrypted data exchange, the key management module transmits the ciphertext to the key management module of the adjacent monitoring unit in a broadcasting manner through the wireless module, the key management module saves the received ciphertext and forwards it to the key management modules of other adjacent monitoring units, and when the ciphertext received by the key management module is repeated, the key management module stops forwarding the repeated ciphertext externally;

[0031] Data decryption: the key management module decrypts the ciphertext to obtain all monitoring unit numbers, specification parameters corresponding to the numbers, and load information. The key management module transmits the monitoring unit numbers, specification parameters corresponding to the numbers, load information, and protection records to the analysis module.

[0032] Furthermore, obtaining the optimization strategy specifically includes:

[0033] The analysis module executes a matching calculation program to analyze the specification parameters, load information and protection records of each monitoring unit number to obtain a replacement plan, wherein the replacement plan includes a first matching index and a second matching index of each monitoring unit;

[0034] The analysis module connects the electrical fire-proof current-limiting protector to the circuit corresponding to the highest matching index of the monitoring unit. If there are multiple electrical fire-proof current-limiting protectors connected to a single circuit, the analysis module selects the electrical fire-proof current-limiting protector corresponding to the highest matching index of the single circuit, and the remaining electrical fire-proof current-limiting protectors are temporarily retained. If there is a single electrical fire-proof current-limiting protector connected to multiple circuits, the analysis module selects the circuit with the highest matching index of the single electrical fire-proof current-limiting monitoring unit, and the remaining circuits are retained;

[0035] Reconnect the remaining electrical fire-proof current-limiting protectors and circuits until all electrical fire-proof current-limiting protectors are connected and paired with all circuits to obtain an optimized strategy.

[0036] The present invention has the following beneficial effects:

[0037] 1. By analyzing the matching index between the electrical fire-proof current-limiting protector and the circuit after installation, an optimization strategy is automatically generated for the mobile terminal to read, which can provide suggestions for optimizing the circuit to the operator so that the electrical fire-proof current-limiting protector can better adapt to the circuit.

[0038] 2. By exchanging encrypted data through communication between multiple monitoring units, data can be protected from leakage and tampering. The decentralized topology network composed of monitoring units enables each monitoring unit to have a complete data backup, which can ensure data security.

[0039] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0041] Figure 1 The present invention is a block diagram of a real-time monitoring system for an electrical fire-proof current-limiting protector. DETAILED DESCRIPTION

[0042] 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.

[0043] See also Figure 1 The present invention provides a technical solution: a real-time monitoring system for an electrical fire-proof current-limiting protector, comprising a number n of monitoring units and a mobile terminal, each monitoring unit having an independent number, the number of monitoring units corresponding to the number of electrical fire-proof current-limiting protectors, the monitoring unit comprising an acquisition module, a clock module, an analysis module, a recording module, a key management module and a wireless module, the output end of the acquisition module is connected to the input end of the analysis module, the acquisition module is used to obtain specification parameters, load information and protection records of the electrical fire-proof current-limiting protector and transmit them to the analysis module, the analysis module analyzes the specification parameters, load information and protection records to obtain a matching index of the monitoring unit, the analysis module establishes a data connection with the recording module, and the analysis module saves the specification parameters, load information, protection records and matching index to the recording module;

[0044] The monitoring unit number is stored in the recording module. The recording module stores computer programs or instructions for the analysis module to execute. The recording module also stores a public key library and a private key library for data encryption. The monitoring unit number is stored in the recording module. The public key in the public key library is used for encryption, and the private key in the private key library is used for decryption. The output end of the clock module is connected to the input end of the recording module, and the output end of the recording module is connected to the input end of the key management module. The time change of the clock module of the recording module synchronously changes the public key in the public key library and the private key in the private key library and transmits them to the key management module. The public key and the private key change once every minute.

[0045] The clock module establishes a data connection with the analysis module, and the clock module is used to calibrate the time difference between each monitoring unit;

[0046] The key management module establishes a data connection with the analysis module, the analysis module reads the monitoring unit number from the recording module, the analysis module transmits the monitoring unit number and the matching index to the key management module, the key management module uses the public key to encrypt the monitoring unit number and the matching index to obtain a ciphertext, each monitoring unit exchanges ciphertexts through the wireless module and transmits the ciphertexts to the key management module, the key management module uses the private key to decrypt the ciphertext to obtain the monitoring unit number and the matching index corresponding to the number, the key management module transmits the monitoring unit number and the matching index corresponding to the number to the analysis module, and the analysis module transfers the monitoring unit number and the matching index corresponding to the number to the recording module;

[0047] The mobile terminal establishes a data connection with the key management module through the wireless module, the mobile terminal sends a data request to the analysis module through the wireless module and the key management module, and the analysis module transmits the optimization strategy to the mobile terminal through the key management module and the wireless module in turn;

[0048] Calculate the first matching index of the monitoring unit, the acquisition module obtains the specification parameters of the electrical fire-proof current-limiting protector, the load information of the connected circuit and the protection record and transmits them to the analysis module, executes the matching calculation program to obtain the first matching index of the monitoring unit, and the first matching index represents the degree of adaptation of the electrical fire-proof current-limiting protector to the connected circuit;

[0049] Specifications include rated current , protection current , Cut off time And detection range , load information includes the average current of the connected circuit , the maximum current of the connected circuit and the current fluctuation rate of the connected circuit , protection records include the number of fault events , mean troubleshooting time and runtime ;

[0050] Ciphertext exchange, the analysis module executes the time calibration procedure, the key management module encrypts the specification parameters, load information and protection records into ciphertext, each monitoring unit exchanges ciphertext through the wireless module, and the key management module decrypts the ciphertext to obtain the specification parameters, load information and protection records of other electrical fire-proof current-limiting protectors;

[0051] Calculate the second matching index of the monitoring unit, the analysis module executes the matching calculation program to obtain the second matching index of the monitoring unit, the second matching index represents the degree of adaptation between the electrical fire-proof current-limiting protector and other circuits;

[0052] Generate an optimization strategy, the analysis module generates a replacement plan according to the first index and the second index, the monitoring unit obtains the optimization strategy by analyzing the matching index, and all monitoring units transmit the optimization strategy to each other through the wireless module until each monitoring unit obtains the optimization strategy;

[0053] The mobile terminal sends data requests to any monitoring unit analysis module through the wireless module and the key management module in turn. The analysis module sends the optimization strategy to the mobile terminal through the key management module and the wireless module in turn. The operator obtains the optimization strategy through the mobile terminal and replaces the electrical fire-proof current-limiting protector and the circuit according to the optimization strategy. The electrical fire-proof current-limiting protector and the circuit can be more adaptable. The topological network composed of all monitoring units can realize data decentralization. If one of the monitoring units is damaged, it will not cause data loss. The mobile terminal is specifically a wireless terminal with a touch screen interactive function. Any wireless terminal on the market that can meet the communication function can be used. The specific model is not limited here.

[0054] The matching calculation procedure specifically includes:

[0055] Calculating Current Index , the analysis module is based on the formula Calculate the current load index , the analysis module is based on the formula Calculate the load protection index , the analysis module is based on the formula Calculate the current index ;

[0056] Calculate safety index , the analysis module is based on the formula Calculate the safety index , where k is the preset threshold, according to the formula Determine a specific value of the preset threshold k;

[0057] Calculation precision index , the analysis module is based on the formula Calculate the precision index ;

[0058] Calculate the running index , the analysis module is based on the formula Calculate the running index , running index The percentage of trouble-free operation time of electrical fire-proof current-limiting protectors;

[0059] To calculate the matching index, the analysis module uses the formula The matching index of the monitoring unit is calculated, and the first matching index and the second matching index are both obtained by this formula, where They are all weight coefficients. The specific values ​​are determined according to the actual circuit layout inside the electrical cabinet. The matching index can intuitively reflect the matching degree between the electrical fire-proof current-limiting protector and different circuits. The higher the matching index, the better the protection effect of the electrical fire-proof current-limiting protector after being connected to the corresponding circuit, and the more stable the circuit operation.

[0060] The time calibration procedure specifically includes:

[0061] A topology network is established, the analysis module obtains time information from the clock module and transmits the time information and the monitoring unit number to the key management module, and the key management module establishes a data connection with other adjacent monitoring unit key management modules within the communication range of the wireless module through the wireless module;

[0062] In the exchange of non-encrypted data, the key management module transmits the time information and the monitoring unit number to the key management module of the adjacent monitoring unit in a broadcasting manner. The key management module saves the received time information and the monitoring unit number and forwards them to the key management modules of other adjacent monitoring units. When the monitoring unit number received by the key management module is repeated, the key management module stops forwarding the repeated monitoring unit number and the time information corresponding to the number. Stopping forwarding the repeated monitoring unit number and the corresponding time information is to prevent excessive forwarding of data in the topological network composed of monitoring units, resulting in a broadcast storm.

[0063] It should be noted that the information content of the data exchange is the number and time information of the monitoring unit. The number and time information of the monitoring unit are non-sensitive information and do not need to be encrypted. In addition, the time calibration program is to calibrate the time of all monitoring units and provide a time reference for the encryption and decryption process of the key management module. Therefore, the number and time information of the monitoring unit are transmitted in a non-encrypted manner in the data exchange;

[0064] The key management module transmits all the collected time information and monitoring unit numbers to the analysis module. The analysis module establishes a time distribution graph, with the horizontal axis being time in seconds and the vertical axis being quantity in units. The analysis module imports all the time information into the time distribution graph to obtain a time distribution curve. The analysis module divides the time distribution curve into segments at a preset fixed time interval of 3 seconds. The analysis module calculates the average value of each segmented time distribution curve, and takes the midpoint of the time period corresponding to the time distribution curve with the highest average value as the reference time.

[0065] The purpose is to find the time point with the most concentrated time distribution in all monitoring units as the reference time, to provide a basis standard for subsequent calibration time, and the analysis and calculation process can be executed in the analysis module in any monitoring unit, and the calibration time is subsequently forwarded to each other through the wireless module;

[0066] The analysis module calculates the time difference between the time information corresponding to each monitoring unit number and the reference time, binds the time difference to the monitoring unit number and transmits it to the key management module, which then performs a non-encrypted data exchange, the exchanged data being the monitoring unit number and the corresponding time difference;

[0067] The key management module transmits all the received monitoring unit numbers and corresponding time differences to the analysis module. The analysis module retrieves the time difference corresponding to its own monitoring unit number and transmits it to the clock module. The clock module calibrates its own time according to the time difference.

[0068] The encryption and decryption process of the ciphertext specifically includes:

[0069] Retrieve the public key and private key. The analysis module retrieves the time information from the clock module and transmits it to the key management module. The analysis module retrieves the monitoring unit number, specification parameters, load information and protection record from the recording module and transmits them to the key management module. The key management module reads the public key and private key corresponding to the time information from the public key library and private key library of the recording module according to the time information. The key management module uses the public key to encrypt the monitoring unit number, specification parameters, load information and protection record to obtain ciphertext.

[0070] Encrypted data exchange, the key management module transmits the ciphertext to the key management module of the adjacent monitoring unit by broadcasting through the wireless module, the key management module saves the received ciphertext and forwards it to the key management modules of other adjacent monitoring units, when the ciphertext received by the key management module is repeated, the key management module stops forwarding the repeated ciphertext;

[0071] Data decryption: The key management module decrypts the ciphertext to obtain all monitoring unit numbers, specification parameters corresponding to the numbers, and load information. The key management module transmits the monitoring unit numbers, specification parameters corresponding to the numbers, load information, and protection records to the analysis module.

[0072] The optimization strategy specifically includes:

[0073] The analysis module executes a matching calculation program to analyze the specification parameters, load information and protection records of each monitoring unit number to obtain a replacement plan, which includes a first matching index and a second matching index of each monitoring unit;

[0074] The analysis module connects the electrical fire-proof current-limiting protector to the circuit corresponding to the highest matching index of the monitoring unit. If there are multiple electrical fire-proof current-limiting protectors connected to a single circuit, the analysis module selects the electrical fire-proof current-limiting protector corresponding to the highest matching index of the single circuit, and the remaining electrical fire-proof current-limiting protectors are temporarily retained. If there is a single electrical fire-proof current-limiting protector connected to multiple circuits, the analysis module selects the circuit with the highest matching index of the single electrical fire-proof current-limiting monitoring unit, and the remaining circuits are retained;

[0075] Reconnect the remaining electrical fire-proof current-limiting protectors and circuits until all electrical fire-proof current-limiting protectors are connected and paired with all circuits to obtain an optimized strategy.

[0076] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A real-time monitoring system for electrical fire-proof current-limiting protectors, characterized in that: The invention comprises a plurality of monitoring units and a mobile terminal, each of which has an independent number. The monitoring unit comprises a collection module, a clock module, an analysis module, a recording module, a key management module and a wireless module. The output end of the collection module is connected to the input end of the analysis module, and is used to obtain the specification parameters, load information and protection records of the electrical fire-proof current-limiting protector and transmit them to the analysis module. The analysis module analyzes the specification parameters, load information and protection records to obtain the matching index of the monitoring unit. The analysis module establishes a data connection with the recording module. The analysis module saves the specification parameters, load information, protection records and matching index to the recording module. The matching index includes a first matching index and a second matching index. The monitoring unit number is stored in the recording module, the recording module internally stores a computer program or instruction for the analysis module to execute, stores a public key library and a private key library for data encryption, the recording module internally stores the monitoring unit number, the public key in the public key library is used for encryption, and the private key in the private key library is used for decryption, the output end of the clock module is connected to the input end of the recording module, the output end of the recording module is connected to the input end of the key management module, and the time change of the clock module of the recording module synchronously changes the public key in the public key library and the private key in the private key library and transmits them to the key management module; The clock module establishes a data connection with the analysis module to calibrate the time difference between the various monitoring units; The key management module establishes a data connection with the analysis module, the key management module uses the public key to encrypt the monitoring unit number and the matching index to obtain a ciphertext, each monitoring unit exchanges the ciphertext through the wireless module and transmits the ciphertext to the key management module, the key management module uses the private key to decrypt the ciphertext to obtain the monitoring unit number and the matching index, and transfers the monitoring unit number and the matching index to the recording module; The mobile terminal establishes a data connection with the key management module via the wireless module.

2. A real-time monitoring system for electrical fire-proof current-limiting protectors according to claim 1, characterized in that: The acquisition module obtains specification parameters, load information and protection records of the electrical fire-proof current-limiting protector and transmits them to the analysis module, and the analysis module executes a matching calculation program to obtain a first matching index of the monitoring unit, where the first matching index represents the degree of adaptation of the electrical fire-proof current-limiting protector to the connected circuit; The specifications include rated current , protection current , Cut off time And detection range , the load information includes the average current , Maximum current and current fluctuation rate , the protection record includes the number of fault events , mean troubleshooting time and runtime ; The analysis module executes a time calibration procedure, the key management module encrypts specification parameters, load information and protection records into ciphertext, each monitoring unit exchanges ciphertext through a wireless module, and the key management module decrypts the ciphertext to obtain specification parameters, load information and protection records of other electrical fire-proof current-limiting protectors; The analysis module executes a matching calculation program to obtain a second matching index of the monitoring unit, where the second matching index represents the degree of compatibility between the electrical fire-proof current-limiting protector and other circuits; The analysis module generates a replacement plan according to the first index and the second index, the monitoring unit obtains an optimization strategy by analyzing the matching index, and all monitoring units transmit the optimization strategy to each other through the wireless module until each monitoring unit obtains the optimization strategy; The mobile terminal sends a data request to the analysis module, and the analysis module sends the optimization strategy to the mobile terminal.

3. A real-time monitoring system for electrical fire-proof current-limiting protectors according to claim 2, characterized in that: The matching calculation program specifically includes: Calculating Current Index , according to the formula Calculate the current load index , according to the formula Calculate the load protection index , according to the formula Calculate the current index ; Calculate safety index , according to the formula Calculate the safety index , where k is the preset threshold, according to the formula Determine a specific value of the preset threshold k; Calculation precision index , according to the formula Calculate the precision index ; Calculate the running index , according to the formula Calculate the running index , running index is the percentage of the protector’s trouble-free operation time; Calculate the matching index using the formula Calculate the matching index between the protector and the circuit, where are all weight coefficients.

4. A real-time monitoring system for electrical fire-proof current-limiting protectors according to claim 2, characterized in that: The time calibration procedure specifically includes: Establishing a topological network, the analysis module obtains time information from the clock module and transmits the time information and the monitoring unit number to the key management module, and the key management module establishes a data connection with other adjacent monitoring unit key management modules through the wireless module; Unencrypted data exchange, the key management module transmits the time information and monitoring unit number to the key management module of the adjacent monitoring unit in a broadcasting manner, the key management module saves the received time information and monitoring unit number and forwards it to the key management modules of other adjacent monitoring units, when the received monitoring unit number is repeated, the key management module stops forwarding the repeated monitoring unit number and the time information corresponding to the number; The key management module transmits all the collected time information and monitoring unit numbers to the analysis module, establishes a time distribution graph, with the horizontal axis being time in seconds and the vertical axis being quantity in units, imports all the time information into the time distribution graph to obtain a time distribution curve, divides the time distribution curve at preset fixed time intervals, calculates the average value of each time distribution curve after division, and takes the midpoint of the time period corresponding to the time distribution curve with the highest average value as the reference time; Calculate the time difference between the time information corresponding to each monitoring unit number and the reference time, bind the time difference with the monitoring unit number and transmit it to the key management module, and the key management module performs another unencrypted data exchange, and the exchanged data is the monitoring unit number and the corresponding time difference; The key management module transmits all received monitoring unit numbers and corresponding time differences to the analysis module, retrieves the time difference corresponding to its own monitoring unit number and transmits it to the clock module, and the clock module calibrates its own time according to the time difference.

5. A real-time monitoring system for electrical fire-proof current-limiting protectors according to claim 2, characterized in that: The encryption and decryption process of the ciphertext specifically includes: Retrieving the public key and the private key, the analysis module retrieves the time information from the clock module and transmits it to the key management module, retrieves the monitoring unit number, specification parameters, load information and protection record from the recording module and transmits them to the key management module, reads the public key and private key corresponding to the time information from the public key library and the private key library of the recording module according to the time information, and uses the public key to encrypt the monitoring unit number, specification parameters, load information and protection record to obtain ciphertext; Encrypted data exchange, the key management module transmits the ciphertext to the key management module of the adjacent monitoring unit in a broadcasting manner through the wireless module, saves the received ciphertext and forwards it to the key management module of other adjacent monitoring units, and stops forwarding the repeated ciphertext when the received ciphertext is repeated; Data decryption: decrypt the ciphertext to obtain all monitoring unit numbers, specification parameters corresponding to the numbers, and load information, and transmit the monitoring unit numbers, specification parameters corresponding to the numbers, load information, and protection records to the analysis module.

6. A real-time monitoring system for electrical fire-proof current-limiting protectors according to claim 2, characterized in that: The acquisition of the optimization strategy specifically includes: The analysis module executes a matching calculation program to analyze the specification parameters, load information and protection records of each monitoring unit number to obtain a replacement plan, wherein the replacement plan includes a first matching index and a second matching index of each monitoring unit; Connect the electrical fire-proof current-limiting protector to the circuit corresponding to the highest matching index of the monitoring unit. If there are multiple electrical fire-proof current-limiting protectors connected to a single circuit, select the electrical fire-proof current-limiting protector corresponding to the highest matching index of the single circuit, and temporarily retain the remaining electrical fire-proof current-limiting protectors. If there is a single electrical fire-proof current-limiting protector connected to multiple circuits, select the circuit with the highest matching index with a single electrical fire-proof current-limiting monitoring unit, and retain the remaining circuits; Reconnect the remaining electrical fire-proof current-limiting protectors and circuits until all electrical fire-proof current-limiting protectors are connected and paired with all circuits to obtain an optimized strategy.

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