Current-carrying capacity analysis system for copper-aluminum transition temporary drainage wire clamp

Abstract

The invention relates to the technical field of current-carrying capacity analysis of a wire clamp, and particularly discloses a current-carrying capacity analysis system for a copper-aluminum transition temporary drainage wire clamp, which is used for solving the problems that the installation quality of the wire clamp is insufficient and the fastening force is inappropriate when the copper-aluminum transition temporary drainage wire clamp is installed at present. The method comprises the following steps: acquiring historical fastening force data, monitoring the relationship between the current fastening force and the contact resistance in real time, constructing a temperature change model, determining the optimal fastening force based on a fastening force and temperature optimization model, and determining the maximum current-carrying capacity of the wire clamp under the optimal condition based on the analysis of the influence of the fastening force and the temperature on the current-carrying capacity of the wire clamp. According to the utility model, the comprehensive improvement from installation quality control, temperature optimization to maximum current-carrying capacity analysis is realized, the efficient and safe operation of the wire clamp is ensured, and a three-level alarm is set for warning, so that the safety of the system is further enhanced, the service life of equipment is remarkably prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of current carrying capacity analysis of wire clamps, and more specifically to an current carrying capacity analysis system for a copper-aluminum transition temporary drainage wire clamp. Background Art

[0002] In the connection between overhead transmission lines and electrical equipment, copper-aluminum transition temporary drainage clamps are important connecting components used to achieve transition connections between conductors of different materials. When installing copper-aluminum transition temporary drainage clamps, there is often insufficient installation quality of the clamps, including inappropriate tightening force, which leads to abnormal contact resistance and further generates heat. In severe cases, it will affect the current-carrying capacity of the clamps, resulting in a decrease in the reliability of the entire transmission line. In the existing public literature, the document (Wang Yiqing. Causes and simulation analysis of overheating of overhead line tension clamps [D]. South China University of Technology, 2019. DOI: 10.27151 / d.cnki.ghnlu.2019.003477.) analyzes the main factors of clamp overheating by conducting a temperature rise test of the tension clamp under multivariable conditions, determines the mechanism of clamp overheating, and proposes corresponding measures to prevent clamp overheating and solve the problem of clamp overheating based on the analysis results. Then, a three-dimensional finite element tension clamp simulation model based on electromagnetic-thermal coupling is used to simulate and calculate the temperature field of the tension clamp under different states. Finally, the electrothermal analogy principle is used to construct a calculation model for the maximum temperature of the tension clamp under heavy load, and the model parameters are corrected through experiments and simulation results, finally forming a set of tension clamp maximum temperature calculation software.

[0003] The above literature ignores that during the installation of the wire clamp, an overly tight connection will cause microscopic deformation of the copper or aluminum material, affecting the actual contact area and conductive path of the contact surface, thereby increasing the contact resistance and causing local heating. On the contrary, if the installation is too loose, the contact surface cannot be fully fitted, the current transmission path is not smooth, and a high resistance area will also be formed, causing heating. Due to the different thermal expansion coefficients of copper and aluminum, the contact resistance will be further increased as the temperature changes during operation, causing the temperature of the wire clamp to continue to rise, resulting in an intensified thermal cycle. Excessive temperature will cause the load-bearing capacity of the wire clamp to decrease, and long-term overheating may cause material degradation and even cause the line to trip.

[0004] In order to solve the above problems, a technical solution is now provided. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a current-carrying capacity analysis system for a copper-aluminum transition temporary drainage wire clamp, which is used to solve the problem that when installing the existing copper-aluminum transition temporary drainage wire clamp, the installation quality of the wire clamp is often insufficient, including inappropriate fastening force, resulting in abnormal contact resistance and further heat generation, which in severe cases will affect the current-carrying capacity of the wire clamp and reduce the reliability of the entire transmission line, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A copper-aluminum transition temporary drainage clamp current carrying capacity analysis system includes a copper-aluminum transition temporary drainage clamp, a clamp fastening force analysis module, a current carrying capacity influence analysis module and a clamp abnormality warning module; the clamp fastening force analysis module is used to acquire historical fastening force data, monitor the relationship between the current fastening force and the contact resistance in real time, build a temperature change model, and determine the optimal fastening force based on the fastening force and temperature optimization model; the primary clamp analysis module includes a first parameter acquisition unit, a clamp performance analysis unit and a fastening force control unit; the clamp performance analysis unit is used to acquire the fastening force and contact resistance when the clamp is installed, wherein the initial fastening force applied is F 0 , the initial contact resistance is R c (F 0 ), a clamp temperature change analysis model is constructed based on the tightening force and contact resistance; the tightening force control unit is used to obtain the clamp temperature T when the tightening force is F c (F), based on T c (F) Develop a tightening force optimization model to find the optimal tightening force F that minimizes the clamp temperature opt , select the initial tightening force F 0 , and calculate the initial tightening force F 0 Temperature T c (F 0 ), the clamp temperature T when the tightening force is F is adjusted by the tightening force optimization model. c (F) is minimized to obtain the optimal tightening force F opt , the tightening force optimization model formula is:

[0008]

[0009] F min ≤F≤F max ;

[0010] F min ≤F opt ≤F max ;

[0011] Where: T amis the ambient temperature, A(F) is the contact area when the tightening force is F, T min (F opt ) is the optimal tightening force F opt The minimum clamp temperature value when c (F) is the minimum clamp temperature when the clamping force is F, F min is the minimum value in the second tightening force range, F max It is the maximum value in the second tightening force range.

[0012] As a further solution of the present invention, the first parameter acquisition unit is used to obtain the first tightening force range value when the historical copper-aluminum transition temporary drainage wire clamp is installed, screen out the maximum value and the minimum value based on the first tightening force range value, obtain the second tightening force range value after deleting the maximum value and the minimum value, and determine the standard wire clamp tightening force range based on the maximum value and the minimum value in the second tightening force range value.

[0013] As a further solution of the present invention, the current carrying capacity influence analysis module includes a second parameter acquisition module and a current carrying capacity analysis unit; the second parameter acquisition module is connected to the current carrying capacity analysis unit; the second parameter acquisition module is used to obtain the optimal fastening force F opt The minimum clamp temperature value when the clamp temperature is minimized and the optimal tightening force F opt , and obtain the first real-time temperature and the first tightening force during the installation of the wire clamp, respectively based on the optimal tightening force F opt The first influencing index calculation model is constructed based on the minimum clamp temperature value and the first real-time temperature to obtain the first influencing index, and the optimal fastening force F that minimizes the clamp temperature is obtained. opt And the first tightening force constructs a second influencing index calculation model to obtain the second influencing index.

[0014] As a further solution of the present invention, the formula of the first impact index calculation model is:

[0015]

[0016] Where: μ T is the first influencing indicator, n is the number of first real-time temperature acquisitions during the installation process, T i is the first real-time temperature of the ith c (F) is the clamp temperature when the clamping force is F, T max The maximum value of the first real-time temperature during the installation process, T min is the minimum value of the first real-time temperature during the installation process, and ε is the adjustment coefficient to prevent the denominator from being zero.

[0017] As a further solution of the present invention, the formula of the second impact index calculation model is:

[0018]

[0019] Where: μ F is the second influencing index, n is the number of first tightening forces obtained during installation, and F i is the i-th first tightening force, F opt is the optimal tightening force, F min is the minimum value in the second tightening force range, F max is the maximum value in the second tightening force range, and ε is the adjustment coefficient to prevent the denominator from being zero.

[0020] As a further solution of the present invention, the current carrying capacity analysis unit is used to analyze the current carrying capacity of the device based on the optimal fastening force F. opt The minimum clamp temperature value when the clamp temperature is minimized and the optimal tightening force F opt Construct a current carrying capacity analysis model for the wire clamp to analyze the maximum current carrying capacity of the wire clamp. The formula for the current carrying capacity analysis model for the wire clamp is:

[0021]

[0022] Where: I max is the maximum current carrying capacity of the wire clamp, μ T is the first influencing indicator, μ F is the second influencing indicator, T max is the preset clamp temperature threshold, T min (F opt ) is the optimal tightening force F opt Minimum clamp temperature value at 1 is the material constant of the clamp, F opt is the optimal tightening force, A heat is the effective heat dissipation area of ​​the wire clamp, k is the thermal conductivity of the wire clamp material, and ρ is the resistivity of the wire clamp material.

[0023] As a further solution of the present invention, the wire clamp abnormality warning module includes a primary abnormality warning module, a secondary abnormality warning module and a tertiary abnormality warning module;

[0024] The first-level abnormal warning module is used for the tightening force of the copper-aluminum transition temporary drainage wire clamp during installation. If the tightening force value is within the standard wire clamp tightening force range, the first-level alarm will not be triggered; otherwise, the first-level alarm will be triggered;

[0025] The secondary abnormal warning module is used to obtain the clamp temperature T when the tightening force is F. c (F), the clamp temperature T when the tightening force is F c (F) is compared with the preset clamp temperature threshold. If the clamp temperature T is c(F) is greater than or equal to the preset clamp temperature threshold, a level 1 alarm will be triggered; if the clamp temperature T when the tightening force is F c (F) If the temperature is less than the preset clamp temperature threshold, the first level alarm will not be triggered;

[0026] The third-level abnormal warning module is used to obtain the maximum current-carrying capacity of the wire clamp, and compare the maximum current-carrying capacity of the wire clamp with the preset maximum current-carrying capacity threshold. If the maximum current-carrying capacity of the wire clamp is greater than or equal to the preset maximum current-carrying capacity threshold, a third-level alarm will be triggered; if the maximum current-carrying capacity of the wire clamp is less than the preset maximum current-carrying capacity threshold, the third-level alarm will not be triggered.

[0027] The technical effects and advantages of the copper-aluminum transition temporary drainage wire clamp current carrying capacity analysis system of the present invention: the present invention obtains historical fastening force data, monitors the relationship between the current fastening force and the contact resistance in real time, constructs a temperature change model, and determines the optimal fastening force based on the optimization model of the fastening force and temperature, and then determines the maximum current carrying capacity of the wire clamp under optimal conditions based on the analysis of the influence of the fastening force and temperature on the current carrying capacity of the wire clamp, thereby achieving an all-round improvement from installation quality control, temperature optimization to maximum current carrying capacity analysis, ensuring the efficient and safe operation of the wire clamp, and setting a three-level alarm for warning, further enhancing the safety of the system, significantly extending the service life of the equipment, and helping to reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A structural schematic diagram of a copper-aluminum transition temporary drainage wire clamp current carrying capacity analysis system provided by the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solution in the present invention. Obviously, the described technical solution is only a part of the present invention, not all of it. Based on the technical solution in the present invention, all other technical solutions obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Figure 1 The present invention provides a schematic diagram of the structure of a copper-aluminum transition temporary drainage clamp current carrying capacity analysis system. Figure 1 As shown, a copper-aluminum transition temporary drainage wire clamp current carrying capacity analysis system includes a copper-aluminum transition temporary drainage wire clamp, a wire clamp fastening force analysis module, a current carrying capacity impact analysis module and a wire clamp abnormality warning module;

[0031] The clamp tightening force analysis module is used to obtain historical tightening force data, monitor the relationship between current tightening force and contact resistance in real time, build a temperature change model, and determine the optimal tightening force based on the tightening force and temperature optimization model;

[0032] The current carrying capacity impact analysis module is used to determine the maximum current carrying capacity of the wire clamp under optimal conditions by analyzing the influence of fastening force and temperature on the current carrying capacity of the wire clamp;

[0033] The wire clamp abnormality warning module is used to set a three-level alarm.

[0034] Specifically, the primary wire clamp analysis module includes a first parameter acquisition unit, a wire clamp performance analysis unit and a tightening force control unit; the first parameter acquisition unit is connected to the wire clamp performance analysis unit, and the wire clamp performance analysis unit is connected to the tightening force control unit.

[0035] The first parameter acquisition unit is used to obtain the first tightening force range value when the historical copper-aluminum transition temporary drainage wire clamp is installed, screen out the maximum value and the minimum value based on the first tightening force range value, obtain the second tightening force range value after deleting the maximum value and the minimum value, and determine the standard wire clamp tightening force range based on the maximum value and the minimum value in the second tightening force range value;

[0036] The wire clamp performance analysis unit is used to obtain the clamping force and contact resistance during installation. The initial clamping force applied is F 0 , the initial contact resistance is R c (F 0 ), a wire clamp temperature change analysis model is constructed based on the tightening force and contact resistance. The formula of the wire clamp temperature change analysis model is:

[0037]

[0038] Where: is the gradient operator, k is the thermal conductivity of the clamp material, T c (F) is the clamp temperature when the clamping force is F, I is the clamp current, R c (F) is the contact resistance when the tightening force is F, is the heat conduction term, which represents the heat diffusion caused by the temperature difference of the wire clamp, I 2 ·R c (F) is the current passing through the contact resistance R c (F) The Joule heat generated, T am is the ambient temperature, A(F) is the contact area when the tightening force is F;

[0039] The tightening force control unit is used to obtain the clamp temperature T when the tightening force is F. c (F), based on T c (F) Develop a tightening force optimization model to find the optimal tightening force F that minimizes the clamp temperature opt , select the initial tightening force F 0 , and calculate the initial tightening force F 0 Temperature Tc (F 0 ), the clamp temperature T when the tightening force is F is adjusted by the tightening force optimization model. c (F) is minimized to obtain the optimal tightening force F opt , the tightening force optimization model formula is:

[0040]

[0041]

[0042] F min ≤F≤F max ;

[0043] F min ≤F opt ≤F max ;

[0044] Where: T am is the ambient temperature, A(F) is the contact area when the tightening force is F, T min (F opt ) is the optimal tightening force F opt The minimum clamp temperature value when c (F) is the minimum clamp temperature when the clamping force is F, F min is the minimum value in the second tightening force range, F max It is the maximum value in the second tightening force range.

[0045] Through the first parameter acquisition unit, historical installation tightening force data is automatically collected and analyzed to screen out the standard tightening force range [F min , F max], providing a reference for newly installed wire clamps, determining the tightening force range in a data-driven manner, reducing errors caused by manual judgment, and ensuring that the tightening force is kept within the optimal range during installation, thereby improving installation quality; the wire clamp performance analysis unit builds a temperature change analysis model based on real-time tightening force and contact resistance, which can predict the temperature change of the wire clamp in real time, calculate the Joule heat and heat conduction effects generated by the current passing through the contact resistance, and timely understand the temperature change to avoid equipment failure or safety hazards caused by excessive temperature; the tightening force control unit obtains the real-time temperature and establishes a tightening force optimization model to find the optimal tightening force that can minimize the temperature, The optimal tightening force can effectively reduce contact resistance, reduce the generation of Joule heat, thereby reducing power loss and improving the overall operating efficiency of the wire clamp; by ensuring that the tightening force is within the optimal range and operating under minimized temperature conditions, the stress and fatigue damage caused by over-tight or over-loose installation is reduced, and the mechanical fatigue and heat loss of the wire clamp are effectively reduced, the service life of the equipment is extended, and the stability of long-term operation is improved; by optimizing the tightening force and reducing the temperature rise, the module helps to reduce the safety risks caused by poor contact or abnormal temperature, and can timely optimize the tightening force to ensure that the equipment operates within a safe temperature range, reducing the risk of failure caused by overheating or poor contact.

[0046] Specifically, the current carrying capacity impact analysis module includes a second parameter acquisition module and a current carrying capacity analysis unit; the second parameter acquisition module is connected to the current carrying capacity analysis unit;

[0047] The second parameter acquisition module is used to obtain the optimal fastening force F opt The minimum clamp temperature value when the clamp temperature is minimized and the optimal tightening force F opt , and obtain the first real-time temperature and the first tightening force during the installation of the wire clamp, respectively based on the optimal tightening force F opt The first influencing index calculation model is constructed based on the minimum clamp temperature value and the first real-time temperature to obtain the first influencing index, and the optimal fastening force F that minimizes the clamp temperature is obtained. opt The first tightening force constructs a second influencing index calculation model to obtain the second influencing index. The formula of the first influencing index calculation model is:

[0048]

[0049] Where: μ T is the first influencing indicator, n is the number of first real-time temperature acquisitions during the installation process, T i is the first real-time temperature of the ith c (F) is the clamp temperature when the clamping force is F, T max The maximum value of the first real-time temperature during the installation process, T minis the minimum value of the first real-time temperature during the installation process, and ε is the adjustment coefficient to prevent the denominator from being zero;

[0050] The formula for the second impact indicator calculation model is:

[0051]

[0052] Where: μ F is the second influencing index, n is the number of first tightening forces obtained during installation, F i is the i-th first tightening force, F opt is the optimal tightening force, F min is the minimum value in the second tightening force range, F max is the maximum value in the second tightening force range, and ε is the adjustment coefficient to prevent the denominator from being zero;

[0053] The current carrying capacity analysis unit is used to calculate the optimal tightening force based on F opt The minimum clamp temperature value when the clamp temperature is minimized and the optimal tightening force F opt Construct a current carrying capacity analysis model for the wire clamp to analyze the maximum current carrying capacity of the wire clamp. The formula for the current carrying capacity analysis model for the wire clamp is:

[0054]

[0055] Where: I max is the maximum current carrying capacity of the clamp, μ T is the first influencing indicator, μ F is the second influencing indicator, T max is the preset clamp temperature threshold, T min (F opt ) is the optimal tightening force F opt Minimum clamp temperature value at 1 is the material constant of the clamp, F opt is the optimal tightening force, A heat is the effective heat dissipation area of ​​the wire clamp, k is the thermal conductivity of the wire clamp material, and ρ is the resistivity of the wire clamp material.

[0056] The second parameter acquisition module acquires temperature and tightening force data in real time during the installation process, and evaluates the fluctuation degree of temperature and tightening force by calculating the first and second influencing indicators. Based on real-time data analysis, it can accurately judge the actual operating status of the wire clamp and provide more reliable current carrying capacity analysis results. The second parameter acquisition module automatically optimizes key parameters through the optimal value and minimum temperature of temperature and tightening force, so that the wire clamp can operate in the best state. By automatically acquiring and calculating the optimal parameters, the error caused by manual intervention is reduced, ensuring the optimal parameters for installation and operation, thereby improving the safety of the wire clamp. The first and second influencing indicators quantify the temperature and tightening force fluctuations during the installation process, which helps to identify potential abnormal Under normal circumstances, by analyzing the temperature and tightening force fluctuations, abnormal conditions are detected in advance and early warnings are issued to prevent failures caused by excessive temperature or abnormal tightening force; the current carrying capacity analysis unit calculates the maximum current carrying capacity of the wire clamp based on the optimal tightening force and temperature, ensuring that the wire clamp reaches the maximum current transmission capacity without exceeding the safety threshold. By optimizing the current carrying capacity, the module enables the wire clamp to efficiently transmit power, reduce power loss, and improve transmission efficiency; through optimal tightening force control and temperature fluctuation monitoring, the stress, heat loss and fatigue caused by over-tight or over-loose installation are reduced, and the stable operation state reduces the fatigue and damage rate of the equipment, thereby extending the service life of the wire clamp and reducing the cost of daily maintenance and replacement.

[0057] The wire clamp abnormal warning module includes a first-level abnormal warning module, a second-level abnormal warning module and a third-level abnormal warning module;

[0058] The first-level abnormal warning module is used for the tightening force of the copper-aluminum transition temporary drainage wire clamp during installation. If the tightening force value is within the standard wire clamp tightening force range, the first-level alarm will not be triggered; otherwise, the first-level alarm will be triggered;

[0059] The secondary abnormal warning module is used to obtain the clamp temperature T when the tightening force is F. c (F), the clamp temperature T when the tightening force is F c (F) is compared with the preset clamp temperature threshold. If the clamp temperature T is c (F) is greater than or equal to the preset clamp temperature threshold, a level 1 alarm will be triggered; if the clamp temperature T when the tightening force is F c (F) If the temperature is less than the preset clamp temperature threshold, the first level alarm will not be triggered;

[0060] The third-level abnormal warning module is used to obtain the maximum current-carrying capacity of the wire clamp, and compare the maximum current-carrying capacity of the wire clamp with the preset maximum current-carrying capacity threshold. If the maximum current-carrying capacity of the wire clamp is greater than or equal to the preset maximum current-carrying capacity threshold, a third-level alarm will be triggered; if the maximum current-carrying capacity of the wire clamp is less than the preset maximum current-carrying capacity threshold, the third-level alarm will not be triggered.

[0061] The first-level abnormal warning module monitors the tightening force of the wire clamp in real time during the installation phase to determine whether it is within the standard tightening force range. If the tightening force value deviates from the range, an alarm is triggered immediately to promptly remind the installer whether the tightening force is too tight or too loose, ensure that the installation meets the standards, avoid unstable equipment operation caused by installation errors, and ensure installation quality; the second-level abnormal warning module monitors whether the temperature of the wire clamp exceeds the safety threshold during the operation phase. If the temperature exceeds the preset temperature threshold, an alarm is triggered to remind inspection and take cooling measures, and timely monitor the temperature exceeding the limit to prevent equipment damage, power transmission efficiency reduction, and even potential fire risks caused by overheating, thereby improving the safety of equipment operation; the third-level abnormal warning module monitors the maximum current carrying capacity of the wire clamp to determine whether it exceeds the preset current carrying capacity threshold. Once the current carrying capacity reaches or exceeds the set threshold, the system will trigger a third-level alarm. By monitoring the maximum current carrying capacity, the equipment is prevented from running for a long time under overload conditions, and the equipment is prevented from overheating, damage or failure caused by overload, thereby ensuring the stability of the power system.

[0062] The embodiment of the present invention ensures that the wire clamp uses appropriate tightening force during the installation process by acquiring the relationship between historical tightening force data and real-time monitoring of the current tightening force, thereby avoiding poor contact or material deformation caused by insufficient or excessive tightening force. The installation is guided by the standard tightening force range based on historical data, making the tightening force control more accurate, avoiding human errors in the traditional installation process, and thus improving the overall installation quality and reliability. By constructing a temperature change model of tightening force and contact resistance and determining the optimal tightening force through an optimization algorithm, this process can monitor the working state of the wire clamp in real time to ensure that the wire clamp operates under the conditions of the lowest temperature and the smallest contact resistance. Through the temperature optimization model, material aging, poor contact or efficiency reduction caused by excessive temperature can be effectively avoided, ensuring the safe operation and long-term stability of the wire clamp. It can analyze the influence of tightening force and temperature on current carrying capacity, calculate the maximum current carrying capacity of the wire clamp under optimal conditions, and achieve the optimal current carrying performance of the wire clamp. Maximizing the current carrying capacity can improve the power transmission efficiency, reduce the resistance increase caused by poor tightening force, and thus reduce power loss, providing support for the efficient operation of the power system. The embodiment of the present invention acquires historical tightening force data, monitors the relationship between the current tightening force and the contact resistance in real time, constructs a temperature change model, and determines the optimal tightening force based on the optimization model of the tightening force and temperature. Then, based on the analysis of the influence of the tightening force and temperature on the current-carrying capacity of the wire clamp, the maximum current-carrying capacity of the wire clamp under the optimal conditions is determined, thereby achieving an all-round improvement from installation quality control, temperature optimization to maximum current-carrying capacity analysis, ensuring the efficient and safe operation of the wire clamp, and setting a three-level alarm for warning, which further enhances the safety of the system, significantly extends the service life of the equipment, and helps to reduce maintenance costs.

[0063] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0064] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A copper-aluminum transition temporary drainage wire clamp current carrying capacity analysis system, comprising a copper-aluminum transition temporary drainage wire clamp, a wire clamp fastening force analysis module, a current carrying capacity impact analysis module and a wire clamp abnormality warning module; characterized in that: The wire clamp tightening force analysis module is used to obtain historical tightening force data, monitor the relationship between the current tightening force and the contact resistance in real time, build a temperature change model, and determine the optimal tightening force based on the tightening force and temperature optimization model; the first-level wire clamp analysis module includes a first parameter acquisition unit, a wire clamp performance analysis unit, and a tightening force control unit; the wire clamp performance analysis unit is used to obtain the tightening force and contact resistance when the wire clamp is installed, where the initial tightening force applied is F0 and the initial contact resistance is R c (F0), a clamp temperature change analysis model is constructed based on the tightening force and contact resistance; the tightening force control unit is used to obtain the clamp temperature T when the tightening force is F. c (F), based on T c (F) Develop a tightening force optimization model to find the optimal tightening force F that minimizes the clamp temperature opt , select the initial tightening force F0, and calculate the temperature T under the initial tightening force F0 c (F0), the clamp temperature T when the tightening force is F is adjusted by the tightening force optimization model c (F) is minimized to obtain the optimal tightening force F opt , the tightening force optimization model formula is: F min ≤F≤F max ; F min ≤F opt ≤F max ; Where: T am is the ambient temperature, A(F) is the contact area when the tightening force is F, T min (F opt ) is the optimal tightening force F opt The minimum clamp temperature value when c (F) is the minimum clamp temperature when the clamping force is F, F min is the minimum value in the second tightening force range, F max It is the maximum value in the second tightening force range.

2. According to claim 1, a copper-aluminum transition temporary drainage clamp current carrying capacity analysis system is characterized in that: The first parameter acquisition unit is used to obtain the first tightening force range value when the historical copper-aluminum transition temporary drainage wire clamp is installed, screen out the maximum value and the minimum value based on the first tightening force range value, obtain the second tightening force range value after deleting the maximum value and the minimum value, and determine the standard wire clamp tightening force range based on the maximum value and the minimum value in the second tightening force range value.

3. The current carrying capacity analysis system of a copper-aluminum transition temporary drainage clamp according to claim 1 is characterized in that: The current carrying capacity impact analysis module includes a second parameter acquisition module and a current carrying capacity analysis unit; the second parameter acquisition module is connected to the current carrying capacity analysis unit; the second parameter acquisition module is used to obtain the optimal fastening force F opt The minimum clamp temperature value when the clamp temperature is minimized and the optimal tightening force F opt , and obtain the first real-time temperature and the first tightening force during the installation of the wire clamp, respectively based on the optimal tightening force F opt The first influencing index calculation model is constructed based on the minimum clamp temperature value and the first real-time temperature to obtain the first influencing index, and the optimal fastening force F that minimizes the clamp temperature is obtained. opt And the first tightening force constructs a second influencing index calculation model to obtain the second influencing index.

4. The current carrying capacity analysis system of a copper-aluminum transition temporary drainage clamp according to claim 3 is characterized in that: The formula for the calculation model of the first impact indicator is: Where: μ T is the first influencing indicator, n is the number of first real-time temperature acquisitions during the installation process, T i is the first real-time temperature of the ith c (F) is the clamp temperature when the clamping force is F, T max The maximum value of the first real-time temperature during the installation process, T min is the minimum value of the first real-time temperature during the installation process, and ε is the adjustment coefficient to prevent the denominator from being zero.

5. The current carrying capacity analysis system of a copper-aluminum transition temporary drainage clamp according to claim 3 is characterized in that: The formula for the second impact indicator calculation model is: Where: μ F is the second influencing index, n is the number of first tightening forces obtained during installation, and F i is the i-th first tightening force, F opt is the optimal tightening force, F min is the minimum value in the second tightening force range, F max is the maximum value in the second tightening force range, and ε is the adjustment coefficient to prevent the denominator from being zero.

6. The current carrying capacity analysis system of a copper-aluminum transition temporary drainage clamp according to claim 3 is characterized in that: The current carrying capacity analysis unit is used to calculate the optimal tightening force based on F opt The minimum clamp temperature value when the clamp temperature is minimized and the optimal tightening force F opt Construct a current carrying capacity analysis model for the wire clamp to analyze the maximum current carrying capacity of the wire clamp. The formula for the current carrying capacity analysis model for the wire clamp is: Where: I max is the maximum current carrying capacity of the wire clamp, μ T is the first influencing indicator, μ F is the second influencing indicator, T max is the preset clamp temperature threshold, T min (F opt ) is the optimal tightening force F opt The minimum clamp temperature value when k1 is the clamp material constant, F opt is the optimal tightening force, A heat is the effective heat dissipation area of ​​the wire clamp, k is the thermal conductivity of the wire clamp material, and ρ is the resistivity of the wire clamp material.

7. The current carrying capacity analysis system of a copper-aluminum transition temporary drainage clamp according to claim 1 is characterized in that: The wire clamp abnormal warning module includes a first-level abnormal warning module, a second-level abnormal warning module and a third-level abnormal warning module; The first-level abnormal warning module is used for the tightening force of the copper-aluminum transition temporary drainage wire clamp during installation. If the tightening force value is within the standard wire clamp tightening force range, the first-level alarm will not be triggered; otherwise, the first-level alarm will be triggered; The secondary abnormal warning module is used to obtain the clamp temperature T when the tightening force is F. c (F), the clamp temperature T when the tightening force is F c (F) is compared with the preset clamp temperature threshold. If the clamp temperature T is c (F) is greater than or equal to the preset clamp temperature threshold, a level 1 alarm will be triggered; if the clamp temperature T when the tightening force is F c (F) If the temperature is less than the preset clamp temperature threshold, the first level alarm will not be triggered; The third-level abnormal warning module is used to obtain the maximum current-carrying capacity of the wire clamp, and compare the maximum current-carrying capacity of the wire clamp with the preset maximum current-carrying capacity threshold. If the maximum current-carrying capacity of the wire clamp is greater than or equal to the preset maximum current-carrying capacity threshold, a third-level alarm will be triggered; if the maximum current-carrying capacity of the wire clamp is less than the preset maximum current-carrying capacity threshold, the third-level alarm will not be triggered.

Images