A method and device for monitoring on-line the aeolian vibration of a power transmission line

Abstract

This invention discloses an online monitoring method and device for micro-wind vibration of transmission lines, relating to the field of transmission line monitoring technology. It acquires monitoring data of the transmission line through pre-set vibration damping equipment, extracts vibration characteristics from the monitoring data to obtain effective vibration amplitude, vibration energy density, and attenuation rate. Based on the vibration energy density and a pre-acquired benchmark locking force, a locking force prediction is performed to obtain the corresponding locking force. A warning threshold is set using the monitoring data to obtain a corresponding vibration amplitude warning threshold. A vibration risk assessment is performed based on the effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold to obtain the corresponding monitoring results. This invention solves the technical problem of traditional transmission line operation and maintenance models relying on manual inspections, which makes it difficult to capture the vibration state and potential damage of the line in real time, leading to delayed accident warnings and reduced reliability of transmission line operation.

Description

Technical Field

[0001] This invention relates to the field of power transmission line monitoring technology, and in particular to a method and device for online monitoring of micro-wind vibration of power transmission lines. Background Technology

[0002] With the rapid development of the power industry, high-voltage overhead transmission lines, as the core carriers of energy transmission, are expanding their coverage and crossing more and more transportation infrastructure, ecological protection zones, and other areas, making their operating environment increasingly complex. Aerial vibration is one of the main natural disturbances that transmission lines face over the long term. Although the vibration amplitude is small, prolonged and continuous vibration can lead to conductor fatigue, strand breakage, or even wire breakage, seriously threatening the safe and stable operation of transmission lines and consequently affecting the reliable power supply of the power system.

[0003] Currently, the traditional operation and maintenance mode of transmission lines relies on manual inspection, which is not only labor-intensive and costly, but also has blind spots and makes it difficult to capture the vibration status and potential damage of the lines in real time, resulting in delayed accident warnings and reducing the reliability of transmission line operation. Summary of the Invention

[0004] This invention provides a method and device for online monitoring of micro-wind vibration of transmission lines, which solves the technical problems of traditional transmission line operation and maintenance mode relying on manual inspection, which is not only labor-intensive and costly, but also has blind spots, making it difficult to capture the vibration status and potential damage of the line in real time, resulting in delayed accident early warning and reduced reliability of transmission line operation.

[0005] The first aspect of this invention provides a method for online monitoring of micro-wind vibration in transmission lines, comprising:

[0006] Monitoring data of the transmission line is obtained through a pre-set vibration damping device. Vibration characteristics are extracted from the monitoring data to obtain the effective vibration amplitude, vibration energy density and attenuation rate.

[0007] Based on the vibration energy density and the pre-acquired reference locking force, the locking force is predicted to obtain the corresponding locking force;

[0008] The monitoring data is used to adjust the early warning threshold to obtain the corresponding vibration amplitude early warning threshold;

[0009] Vibration risk assessment is performed based on the effective vibration amplitude, the attenuation rate, the locking force, and the vibration amplitude warning threshold to obtain the corresponding monitoring results.

[0010] By adopting the above technical solution, vibration damping equipment collects real-time monitoring data of transmission lines and extracts vibration characteristics, accurately obtaining effective vibration amplitude, vibration energy density, and attenuation rate. This eliminates the reliance on manual inspections in traditional operation and maintenance models, effectively avoiding the problems of high labor intensity, high cost, and numerous blind spots associated with manual inspections, and achieving automation and real-time monitoring. Simultaneously, by combining vibration energy density with the locking force prediction logic based on the reference locking force, the system can dynamically adapt to the line vibration state and output a reasonable locking force, ensuring the stable operation of the vibration damping equipment. Furthermore, by combining environmental monitoring data such as wind speed and temperature to adjust the vibration amplitude warning threshold, the warning standard is aligned with the actual operating environment, avoiding misjudgments or missed judgments caused by a single fixed threshold. Finally, a multi-index vibration risk assessment is conducted by comprehensively considering effective vibration amplitude, attenuation rate, locking force, and early warning threshold. Compared with the traditional single-index judgment method, this approach can comprehensively and objectively reflect the vibration status and potential damage risk of transmission lines, promptly capture line anomalies, and output accurate monitoring results. This significantly reduces the risk of delayed accident early warning, effectively improves the safety, stability, and reliability of transmission line operation, and provides a solid guarantee for reliable power supply to the power system.

[0011] Optionally, the monitoring data includes acceleration signals, transmitted wave amplitude, and reflected wave amplitude. The step of extracting vibration features from the monitoring data to obtain effective vibration amplitude, vibration energy density, and attenuation rate includes:

[0012] The acceleration signal is denoised to obtain the corresponding target acceleration signal, and the target acceleration signal is input into a preset vibration amplitude function to obtain the corresponding effective vibration amplitude.

[0013] The target acceleration signal is subjected to a fast Fourier transform to obtain the corresponding frequency amplitude data;

[0014] The frequency amplitude data is input into a preset energy density function to obtain the corresponding vibration energy density;

[0015] The difference between the transmitted wave amplitude value and the reflected wave amplitude value is processed to obtain the corresponding first difference value;

[0016] The first difference is compared with the transmitted wave amplitude to obtain the corresponding attenuation rate.

[0017] By adopting the above technical solution, environmental interference noise can be effectively filtered out by first denoising the acceleration signal and then calculating the effective vibration amplitude, ensuring the authenticity and accuracy of the vibration intensity characterization parameters. Performing a Fast Fourier Transform on the denoised target acceleration signal converts the time-domain signal into frequency-domain data, enabling precise extraction of vibration frequency characteristics and providing a reliable basis for subsequent vibration energy density calculations. Processing the frequency amplitude data using a preset energy density function quantifies the distribution of transmission line vibration energy, intuitively reflecting the degree of vibration energy concentration. Calculating the attenuation rate using the difference and ratio of the amplitudes of the transmitted and reflected waves accurately captures the energy loss changes of ultrasonic guided waves in the conductor, providing key indicators for identifying conductor strand breakage and other defects. The overall process achieves refined and multi-dimensional extraction of vibration characteristics, with high data reliability and strong feature representativeness, laying a solid data foundation for subsequent locking force prediction, early warning threshold setting, and risk assessment, and improving the accuracy and reliability of transmission line vibration monitoring.

[0018] Optionally, the step of predicting the locking force based on the vibration energy density and the pre-acquired reference locking force to obtain the corresponding locking force includes:

[0019] The vibration energy density, the preset motor locking coefficient, and the preset ratchet mechanism transmission efficiency are multiplied to obtain the corresponding first multiplication value;

[0020] The first multiplier is added to the pre-acquired reference locking force to obtain the corresponding initial locking force;

[0021] The initial locking force is compared with the preset reference contact area to obtain the corresponding first ratio.

[0022] The first ratio is multiplied by a preset friction gain coefficient to obtain the corresponding soft rubber sleeve pressure.

[0023] When the pressure of the soft rubber sleeve is greater than or equal to the preset soft rubber sleeve pressure threshold, the preset locking force threshold is determined as the corresponding locking force.

[0024] When the pressure of the soft rubber sleeve is less than the soft rubber sleeve pressure threshold, the initial locking force is determined as the corresponding locking force.

[0025] By adopting the above technical solution, the initial locking force is dynamically calculated by combining vibration energy density, motor locking coefficient, and ratchet transmission efficiency. Then, the pressure of the soft rubber sleeve is calculated using contact area and friction gain coefficient. The locking force is adaptively locked or maintained based on the soft rubber sleeve pressure threshold. This method can adjust the locking force in real time according to changes in vibration intensity, ensuring stable contact of the vibration damping equipment, while avoiding damage to the conductor due to excessive pressure. It balances vibration damping effect and line safety, making the locking force control precise, reliable, and adaptive.

[0026] Optionally, the monitoring data further includes ambient wind speed and ambient temperature. The step of using the monitoring data to adjust the warning threshold and obtain the corresponding vibration amplitude warning threshold includes:

[0027] The difference between the ambient temperature and the preset temperature reference value is processed to obtain the corresponding second difference value;

[0028] The absolute value of the second difference is multiplied by a preset first adjustment coefficient to obtain the corresponding second multiplier value;

[0029] The environmental wind speed is multiplied by a preset second tuning coefficient to obtain the corresponding third multiplication value;

[0030] The preset third adjustment coefficient is summed with the third multiplication value to obtain the corresponding first sum value;

[0031] The difference between the first sum and the second multiplication value is calculated to obtain the corresponding third difference value;

[0032] The third difference is multiplied by a preset baseline warning threshold to obtain the corresponding vibration amplitude warning threshold.

[0033] By adopting the above technical solution, the ambient temperature, wind speed and the benchmark warning threshold are linked. The vibration amplitude warning threshold is dynamically adjusted through multi-step difference, multiplication and summation calculations. It can adapt to the line vibration characteristics under different temperature and wind conditions in real time, effectively eliminate the defects of fixed thresholds that are prone to false alarms and missed alarms in complex environments, make the warning standard fit the actual site, and improve the accuracy and environmental adaptability of vibration monitoring and warning.

[0034] Optionally, the step of performing a vibration risk assessment based on the effective vibration amplitude, the attenuation rate, the locking force, and the vibration amplitude warning threshold to obtain the corresponding monitoring results includes:

[0035] The effective vibration amplitude is compared with the vibration amplitude warning threshold to obtain the corresponding second ratio.

[0036] Based on preset warning weights, the attenuation rate, the locking force, and the second ratio are analyzed to obtain the corresponding warning index;

[0037] The pre-defined warning index is used to retrieve a list of pre-defined warning levels and match the corresponding monitoring results.

[0038] By adopting the above technical solution, a warning index is generated by weighting and integrating multiple indicators such as the ratio of effective vibration amplitude to vibration amplitude warning threshold, attenuation rate, and locking force. The monitoring results are then matched with the warning level, breaking through the limitations of single indicator judgment. This comprehensively reflects the vibration intensity, conductor damage risk, and vibration damping device working status, making risk assessment more comprehensive and objective, and the graded warnings clear and explicit. This facilitates maintenance personnel to quickly grasp the line safety status and accurately handle risks.

[0039] Optionally, the step of performing early warning analysis on the attenuation rate, the locking force, and the second ratio based on a preset early warning weight to obtain a corresponding early warning index includes:

[0040] The pre-obtained baseline attenuation rate is summed with the preset attenuation rate mutation threshold to obtain the corresponding second sum value;

[0041] The ratio of the attenuation rate to the second sum is processed to obtain the corresponding third ratio;

[0042] The locking force is compared with a preset locking force threshold to obtain a corresponding fourth ratio.

[0043] The second ratio, the third ratio, and the fourth ratio are weighted according to preset warning weights to obtain the corresponding warning index.

[0044] By adopting the above technical solution, the warning index is obtained by correcting the benchmark attenuation rate and attenuation mutation threshold, calculating the ratio of attenuation rate and second sum value, and then combining the preset weights to perform multi-indicator weighted fusion. This can quantify the degree of abnormal deviation of each parameter, take into account the risk of conductor strand breakage, the locking status of vibration damping device and the situation of vibration amplitude exceeding the standard, avoid the one-sided judgment of a single parameter, make the calculation of the warning index scientific, objective and comprehensive, and improve the accuracy and reliability of risk identification.

[0045] A second aspect of the present invention provides an online monitoring device for micro-wind vibration of transmission lines, comprising:

[0046] The acquisition module is used to acquire monitoring data of the transmission line through a preset vibration damping device, extract vibration characteristics from the monitoring data, and obtain the effective vibration amplitude, vibration energy density and attenuation rate.

[0047] The locking force prediction module is used to predict the locking force based on the vibration energy density and the pre-acquired reference locking force, and obtain the corresponding locking force.

[0048] The tuning module is used to tune the warning threshold using the monitoring data to obtain the corresponding vibration amplitude warning threshold.

[0049] The early warning module is used to assess vibration risk based on the effective vibration amplitude, the attenuation rate, the locking force, and the vibration amplitude early warning threshold, and obtain corresponding monitoring results.

[0050] A third aspect of the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the online monitoring method for micro-wind vibration of transmission lines as described above.

[0051] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the online monitoring method for micro-wind vibration of transmission lines as described above.

[0052] The fifth aspect of the present invention provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein, when the program instructions are executed by a computer, the computer performs the online monitoring method for micro-wind vibration of transmission lines as described above.

[0053] As can be seen from the above technical solutions, the present invention has the following advantages:

[0054] This invention acquires monitoring data of transmission lines through pre-set vibration damping equipment, extracts vibration characteristics from the monitoring data to obtain effective vibration amplitude, vibration energy density, and attenuation rate, predicts the locking force based on the vibration energy density and a pre-acquired benchmark locking force, and obtains the corresponding locking force. It then uses the monitoring data to set a warning threshold, obtaining a corresponding vibration amplitude warning threshold. Finally, it conducts a vibration risk assessment based on the effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold, obtaining the corresponding monitoring results. This invention overcomes the technical problem of traditional transmission line operation and maintenance models that rely on manual inspections, making it difficult to capture the vibration status and potential damage of the line in real time, leading to delayed accident warnings and reduced reliability of transmission line operation. Compared with traditional transmission line operation and maintenance methods, this invention acquires monitoring data of transmission lines through pre-set vibration damping equipment, extracts vibration characteristics from the monitoring data to obtain effective vibration amplitude, vibration energy density, and attenuation rate. Monitoring data of transmission lines can be collected without manual intervention. Vibration risk assessment is performed based on effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold to obtain corresponding monitoring results. This allows for real-time risk assessment of transmission lines. Compared with the single-indicator judgment of existing technologies, it can more comprehensively reflect the safety status of the line and improve the reliability of transmission line operation. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a flowchart illustrating the steps of an online monitoring method for micro-wind vibration of transmission lines according to Embodiment 1 of the present invention.

[0057] Figure 2 This is a schematic diagram of the vibration damping device provided in Embodiment 1 of the present invention;

[0058] Figure 3 This is a flowchart illustrating the steps of an online monitoring method for micro-wind vibration of transmission lines provided in Embodiment 2 of the present invention.

[0059] Figure 4 This is a structural block diagram of an online monitoring device for micro-wind vibration of transmission lines provided in Embodiment 3 of the present invention;

[0060] Figure 5 This is a structural block diagram of an electronic device provided in Embodiment 4 of the present invention.

[0061] in, Figure 2 middle:

[0062] 1. Wire; 2. Soft rubber sleeve; 3. Clamp; 301. Bearing mounting seat; 4. Bearing; 5. Motor; 501. Motor shaft; 502. Motor shaft limit cap; 503. Ratchet mechanism gear plate; 504. Ratchet mechanism baffle; 6. Vibration damper; 601. Vibration damper connecting rod; 602. Vibration damper hammer head; 7. Power module including power supply coil; 8. Controller. Detailed Implementation

[0063] This invention provides a method and device for online monitoring of micro-wind vibration of transmission lines, which solves the technical problem that the traditional operation and maintenance mode of transmission lines relies on manual inspection, which is not only labor-intensive and costly, but also has blind spots, making it difficult to capture the vibration status and potential damage of the line in real time, resulting in delayed accident warnings and reduced reliability of transmission line operation.

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that in the optional embodiments of the present invention, the object information and other related data involved require the permission or consent of the object when the embodiments of the present invention are applied to specific products or technologies, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. That is to say, if the embodiments of the present invention involve data related to the object, it needs to be obtained with the authorization and consent of the object, the authorization and consent of the relevant departments, and in compliance with the relevant laws, regulations, and standards of the country and region. If personal information is involved in the embodiments, the acquisition of all personal information requires the consent of the individual. If sensitive information is involved, the separate consent of the information subject is required, and the embodiments also need to be implemented with the authorization and consent of the object.

[0065] Please see Figure 1 , Figure 1 The flowchart illustrates the steps of an online monitoring method for micro-wind vibration of power transmission lines provided in Embodiment 1 of the present invention.

[0066] This invention provides an online monitoring method for micro-wind vibration of transmission lines, comprising:

[0067] Step 101: Obtain monitoring data of the transmission line through the preset vibration damping equipment, extract vibration characteristics from the monitoring data, and obtain the effective vibration amplitude, vibration energy density and attenuation rate.

[0068] Monitoring data refers to the datasets collected in real time by various sensors and related modules of the vibration damping device, including but not limited to acceleration signals, transmitted wave amplitude, reflected wave amplitude, ambient wind speed, and ambient temperature.

[0069] Effective vibration amplitude, derived from FFT spectrum analysis of the denoised acceleration signal, is a core parameter characterizing the vibration intensity of transmission lines and can objectively reflect the actual effect of vibration on the line.

[0070] Vibration energy density refers to the distribution of vibration energy of transmission lines within a unit frequency range, calculated based on sampling duration, spectral amplitude, and frequency resolution. It is used to quantify the distribution of vibration energy within a unit frequency range and to intuitively reflect the concentration of vibration energy.

[0071] The attenuation rate, calculated from the amplitude of the emitted and reflected waves of the ultrasonic guided wave, reflects the degree of energy loss when the ultrasonic guided wave propagates in the conductor. Its variation characteristics are a key basis for identifying conductor strand breakage defects.

[0072] In this embodiment of the invention, the acceleration signal of the transmission line is collected in real time by a triaxial accelerometer of a pre-set vibration damping device. A detection wave is continuously emitted towards the conductor by an ultrasonic guided wave transmitter of the vibration damping device, and the amplitude of the emitted wave is recorded. Simultaneously, the amplitude of the reflected wave after propagation through the conductor is received. Environmental wind speed and temperature data are collected synchronously through an environmental monitoring module. The acceleration signal is denoised to obtain the corresponding target acceleration signal, which is then input into a pre-set vibration amplitude function to obtain the corresponding effective vibration amplitude. The target acceleration signal is subjected to a fast Fourier transform to obtain the corresponding frequency amplitude data. The frequency amplitude data is input into a pre-set energy density function to obtain the corresponding vibration energy density. The difference between the emitted wave amplitude and the reflected wave amplitude is processed to obtain the corresponding first difference. The ratio of the first difference to the emitted wave amplitude is processed to obtain the corresponding attenuation rate.

[0073] It should be noted that, for reference Figure 2As shown, the vibration damping device includes a soft rubber sleeve, a clamp, a motor, a power supply module 7 with a power take-off coil, and a vibration damper. The soft rubber sleeve 2 directly covers the surface of the conductor 1 of the transmission line, and the diamond-shaped anti-slip groove on its outer surface forms a friction surface with the conductor 1 and the outer layer components. The clamp 3 is coaxially sleeved on the outside of the soft rubber sleeve 2. The clamp 3 has an integrally formed bearing mounting seat 301 and an inner hexagonal nut mounting cavity. The bearing 4 is fixed in the bearing mounting seat 301 of the clamp 3 by embedded installation, ensuring that the inner ring of the bearing can rotate freely. The motor 5 is fixedly installed on the outer wall of the clamp 3 by bolts. The motor shaft 501 extends horizontally through the clamp, and the motor shaft limiting cap 502 and the ratchet mechanism gear plate 503 are sequentially sleeved and fixed. The motor shaft limiting cap 502 is precisely embedded in the inner hexagonal nut mounting cavity of the clamp 3 to achieve axial limiting of the motor shaft 501. The ratchet mechanism gear plate 503 and the ratchet mechanism baffle 504 fixed on the inner wall of the clamp 3 form a one-way meshing relationship, which together constitute a one-way locking mechanism to ensure that the locking force accumulates only in a fixed direction. The soft rubber sleeve 2 has a pressure sensor and an ultrasonic waveguide transmitter pre-embedded inside, and the two are connected to the controller 8 via built-in wires. The vibration damper 6 has a vibration damper connecting rod 601 inserted into the inner ring of the bearing 4 and fixed by interference fit, so that the vibration damper 6 can swing freely around the bearing 4 to achieve the vibration damping function. The vibration damper head 602 has a triaxial acceleration sensor embedded inside, and the sensor is connected to the controller 8 via a wire passing through the vibration damper connecting rod 601. The controller 8 is fixed to the outside of the clamp 3 by a bracket. It integrates a low-power embedded processor and establishes control and signal transmission connections with the motor 5, pressure sensor, ultrasonic waveguide transmitter and triaxial acceleration sensor via wires. The power module 7 is mounted on the conductor 1 and maintains a non-contact inductive connection with the conductor 1. It obtains electrical energy through electromagnetic induction. The power module 7 is connected to the controller 8, motor 5, pressure sensor, ultrasonic wave transmitter, and triaxial accelerometer through the power supply conductors, providing a continuous and stable power supply for all electrical components and ensuring the coordinated operation of each system. At the same time, the controller is equipped with an environmental monitoring module to collect ambient wind speed and ambient temperature.

[0074] It is worth mentioning that by directly collecting transmission line monitoring data through pre-set vibration damping equipment, and extracting three core features—effective vibration amplitude, vibration energy density, and attenuation rate—automatic and integrated acquisition and analysis of vibration data can be achieved. Key parameters reflecting line vibration intensity, energy distribution, and conductor damage risk can be accurately obtained without manual intervention. The data acquisition is efficient and the feature extraction is comprehensive, providing reliable and complete data support for subsequent locking force control, early warning threshold setting, and risk assessment, significantly improving the real-time performance and basic data quality of transmission line vibration monitoring.

[0075] Step 102: Based on the vibration energy density and the pre-obtained reference locking force, predict the locking force to obtain the corresponding locking force.

[0076] The reference locking force refers to the locking force obtained in the previous sampling period.

[0077] In this embodiment of the invention, the vibration energy density and a pre-acquired reference locking force are input into a locking force function to obtain the corresponding initial locking force. The initial locking force and a preset reference contact area are input into a preset soft rubber sleeve pressure function to obtain the corresponding soft rubber sleeve pressure. When the soft rubber sleeve pressure is greater than or equal to a preset soft rubber sleeve pressure threshold, the preset locking force threshold is determined as the corresponding locking force. When the soft rubber sleeve pressure is less than the soft rubber sleeve pressure threshold, the initial locking force is determined as the corresponding locking force.

[0078] It should be noted that the pressure function of the soft rubber sleeve is as follows:

[0079]

[0080] in, The initial locking force after the k-th locking is... The locking force after the (k-1)th locking is... This is the motor locking coefficient. Let be the vibration energy density of the kth sampling period. The efficiency of the ratchet mechanism transmission.

[0081] It should be noted that the pressure function of the soft rubber sleeve is as follows:

[0082]

[0083] in, For the pressure of the soft rubber sleeve, This refers to the contact area between the soft rubber sleeve and the wire. This is the friction gain coefficient.

[0084] It is worth mentioning that by predicting the locking force through vibration energy density and benchmark locking force, the locking force can be dynamically adjusted according to the actual vibration energy changes of the line, so that the locking state of the vibration damping equipment matches the vibration intensity of the line in real time, avoiding slippage or excessive damage to the conductor due to insufficient locking force, ensuring stable and reliable vibration damping effect, and improving the adaptive control capability of the equipment and the safety of line operation.

[0085] Step 103: Use monitoring data to adjust the early warning threshold and obtain the corresponding vibration amplitude early warning threshold.

[0086] The vibration amplitude warning threshold refers to the critical vibration amplitude obtained after the warning threshold is set, and it is the standard for judging whether the vibration intensity of the transmission line exceeds the safe range.

[0087] In this embodiment of the invention, the ambient temperature and ambient wind speed of the monitoring data are input into a preset warning threshold tuning function to obtain the corresponding vibration amplitude warning threshold.

[0088] It should be noted that the specific function for setting the early warning threshold is as follows:

[0089]

[0090] in, As the baseline warning threshold, For ambient wind speed, The ambient temperature.

[0091] It is worth mentioning that by dynamically adjusting the vibration amplitude warning threshold using monitoring data, the warning standard can be adjusted in real time according to the actual working conditions on site. This overcomes the shortcomings of fixed thresholds, such as poor adaptability and easy false alarms and missed alarms, and makes the warning boundary fit environmental changes and line status, significantly improving the accuracy, rationality and environmental adaptability of the warning.

[0092] Step 104: Conduct a vibration risk assessment based on the effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold to obtain the corresponding monitoring results.

[0093] In this embodiment of the invention, the effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold are input into a preset vibration risk assessment function to obtain the corresponding warning index. When the warning index is less than 0.8, the monitoring result is determined to be normal. When the warning index is greater than or equal to 0.8 and less than 1.2, the monitoring result is determined to be cautious. When the warning index is greater than 1.2, the monitoring result is determined to be urgent.

[0094] It is worth mentioning that by comprehensively considering effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold, vibration risk assessment is carried out. This allows for a comprehensive evaluation of the line safety status from multiple dimensions, including vibration intensity, conductor damage, and the status of vibration damping devices. This avoids the one-sidedness of judging by a single indicator, making the risk assessment results more objective and accurate. It also facilitates timely identification of potential hazards and graded early warning, thereby improving the safety and maintenance efficiency of transmission line operation.

[0095] It should be noted that by collecting real-time monitoring data of transmission lines and extracting vibration characteristics through vibration damping equipment, the effective vibration amplitude, vibration energy density, and attenuation rate can be accurately obtained. This eliminates the reliance on manual inspections in traditional operation and maintenance models, effectively avoiding the problems of high labor intensity, high cost, and numerous blind spots associated with manual inspections, and achieving automation and real-time monitoring. Simultaneously, by combining vibration energy density with the locking force prediction logic based on the benchmark locking force, the appropriate locking force can be dynamically adapted to the line vibration state, ensuring the stable operation of the vibration damping equipment. Furthermore, by combining environmental monitoring data such as wind speed and temperature to adjust the vibration amplitude warning threshold, the warning standard is aligned with the actual operating environment, avoiding misjudgments or omissions caused by a single fixed threshold. Finally, a multi-index vibration risk assessment is conducted by comprehensively considering the effective vibration amplitude, attenuation rate, locking force, and warning threshold. Compared to traditional single-index judgment methods, this approach can comprehensively and objectively reflect the vibration state and potential damage risks of transmission lines, promptly capture line anomalies, and output accurate monitoring results, significantly reducing the risk of delayed accident warnings and effectively improving the safety, stability, and reliability of transmission line operation, providing a solid guarantee for reliable power supply to the power system.

[0096] In this embodiment of the invention, monitoring data of the transmission line is acquired through a preset vibration damping device. Vibration characteristics are extracted from the monitoring data to obtain the effective vibration amplitude, vibration energy density, and attenuation rate. Based on the vibration energy density and a pre-acquired benchmark locking force, the locking force is predicted to obtain the corresponding locking force. A warning threshold is set using the monitoring data to obtain the corresponding vibration amplitude warning threshold. A vibration risk assessment is performed based on the effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold to obtain the corresponding monitoring results. This overcomes the technical problem of traditional transmission line operation and maintenance models relying on manual inspections, which makes it difficult to capture the vibration state and potential damage of the line in real time, leading to delayed accident warnings and reduced reliability of transmission line operation. Compared with traditional transmission line operation and maintenance methods, this invention acquires monitoring data of transmission lines through pre-set vibration damping equipment, extracts vibration characteristics from the monitoring data to obtain effective vibration amplitude, vibration energy density, and attenuation rate. Monitoring data of transmission lines can be collected without manual intervention. Vibration risk assessment is performed based on effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold to obtain corresponding monitoring results. This allows for real-time risk assessment of transmission lines. Compared with the single-indicator judgment of existing technologies, it can more comprehensively reflect the safety status of the line and improve the reliability of transmission line operation.

[0097] Please see Figure 3 , Figure 3 This is a flowchart illustrating the steps of an online monitoring method for micro-wind vibration of power transmission lines, as provided in Embodiment 2 of the present invention.

[0098] This invention provides an online monitoring method for micro-wind vibration of transmission lines, comprising:

[0099] Step 201: Obtain monitoring data of the transmission line through the preset vibration damping equipment, extract vibration characteristics from the monitoring data, and obtain the effective vibration amplitude, vibration energy density and attenuation rate.

[0100] Furthermore, the monitoring data includes acceleration signals, transmitted wave amplitude, and reflected wave amplitude. Step 201 includes the following sub-steps:

[0101] S11. The acceleration signal is denoised to obtain the corresponding target acceleration signal, and the target acceleration signal is input into the preset vibration amplitude function to obtain the corresponding effective vibration amplitude.

[0102] The target acceleration signal refers to the pure signal obtained after the acceleration signal has been denoised. It eliminates the noise caused by environmental interference and can truly and accurately reflect the actual vibration state of the transmission line.

[0103] In this embodiment of the invention, the acceleration signal is denoised to obtain the corresponding target acceleration signal, and the corresponding effective vibration amplitude is determined based on the target acceleration signal according to the preset vibration amplitude function.

[0104] It should be noted that the vibration amplitude function is specifically as follows:

[0105]

[0106] in, For sampling duration, For acceleration signals, The effective vibration amplitude is represented by t, which is the time index.

[0107] It is worth mentioning that by first denoising the acceleration signal to filter out environmental interference and noise, a pure target acceleration signal is obtained. Then, the effective vibration amplitude is calculated by using a preset vibration amplitude function, which effectively avoids amplitude distortion caused by noise, ensures the authenticity and reliability of vibration intensity characterization results, improves the accuracy and stability of vibration feature extraction, and provides high-quality basic data for subsequent analysis.

[0108] S12. Perform a fast Fourier transform on the target acceleration signal to obtain the corresponding frequency amplitude data.

[0109] Frequency amplitude data refers to the frequency domain data obtained after the target acceleration signal undergoes a fast Fourier transform.

[0110] In this embodiment of the invention, a Fast Fourier Transform (FFT) is performed on the target acceleration signal to obtain the corresponding frequency amplitude data.

[0111] It should be noted that the Fast Fourier Transform (FFT) is a highly efficient Fourier transform algorithm that can convert signals in the time domain (such as acceleration signals) into spectral data in the frequency domain.

[0112] It is worth mentioning that by performing a fast Fourier transform on the denoised target acceleration signal, the time-domain vibration signal can be efficiently converted into frequency amplitude data in the frequency domain. This can clearly reveal the frequency distribution characteristics of the vibration, accurately identify the dominant vibration frequency and energy distribution, and provide a reliable frequency domain basis for subsequent vibration energy density calculation and vibration characteristic analysis, thereby improving the depth and accuracy of vibration characteristic analysis.

[0113] S13. Input the frequency amplitude data into the preset energy density function to obtain the corresponding vibration energy density.

[0114] In this embodiment of the invention, a preset energy density function is used to determine the corresponding vibration energy density.

[0115] It should be noted that the energy density function is specifically:

[0116]

[0117] in, For spectral amplitude, For frequency resolution, For vibrational energy density, For frequency indexing.

[0118] It is worth mentioning that by substituting the frequency amplitude data into the preset energy density function, the vibration energy distribution of transmission lines at different frequencies can be accurately quantified, intuitively reflecting the concentration and intensity of vibration energy, providing a quantitative basis for assessing vibration hazards and dynamically adjusting locking force, and improving the scientific nature and accuracy of vibration energy assessment.

[0119] S14. Perform difference processing on the transmitted wave amplitude value and the reflected wave amplitude value to obtain the corresponding first difference value.

[0120] The amplitude of the transmitted wave refers to the magnitude of the detection wave emitted by the ultrasonic guided wave transmitter towards the conductor.

[0121] The amplitude of the reflected wave refers to the amplitude of the signal reflected back after the detection wave encounters a broken strand defect or the end of the conductor while propagating in the conductor.

[0122] In this embodiment of the invention, the difference between the amplitude of the transmitted wave and the amplitude of the reflected wave is calculated to obtain the corresponding first difference.

[0123] S15. Ratio the first difference with the transmitted wave amplitude to obtain the corresponding attenuation rate.

[0124] In this embodiment of the invention, the ratio between the first difference and the transmitted wave amplitude is calculated to obtain the corresponding attenuation rate.

[0125] It is worth mentioning that by denoising the acceleration signal before calculating the effective vibration amplitude, environmental interference noise can be effectively filtered out, ensuring the authenticity and accuracy of the vibration intensity characterization parameters. Performing a Fast Fourier Transform on the denoised target acceleration signal converts the time-domain signal into frequency-domain data, enabling precise extraction of vibration frequency characteristics and providing a reliable basis for subsequent vibration energy density calculations. Processing the frequency amplitude data using a preset energy density function quantifies the distribution of transmission line vibration energy, intuitively reflecting the degree of vibration energy concentration. Calculating the attenuation rate using the difference and ratio of the amplitudes of the transmitted and reflected waves accurately captures the energy loss changes of ultrasonic guided waves in the conductor, providing key indicators for identifying conductor strand breakage and other defects. The overall process achieves refined and multi-dimensional extraction of vibration characteristics, with high data reliability and strong feature representativeness, laying a solid data foundation for subsequent locking force prediction, early warning threshold setting, and risk assessment, and improving the accuracy and reliability of transmission line vibration monitoring.

[0126] Step 202: Based on the vibration energy density and the pre-obtained reference locking force, predict the locking force to obtain the corresponding locking force.

[0127] Further, step 202 includes the following sub-steps:

[0128] S21. Multiply the vibration energy density, the preset motor locking coefficient, and the preset ratchet mechanism transmission efficiency to obtain the corresponding first multiplication value.

[0129] The transmission efficiency of a ratchet mechanism refers to the energy transfer efficiency of the ratchet mechanism in converting the power transmitted by the motor into the clamping force.

[0130] The motor locking coefficient is a fixed coefficient pre-calibrated based on the motor's output power, speed, and other performance parameters, representing the efficiency of converting the motor's output power into locking driving force.

[0131] In this embodiment of the invention, the multiplication value between the vibration energy density, the preset motor locking coefficient, and the preset ratchet mechanism transmission efficiency is calculated to obtain the corresponding first multiplication value.

[0132] It is worth mentioning that by multiplying the vibration energy density, the motor locking coefficient, and the ratchet mechanism transmission efficiency, the influence of vibration on the locking force can be accurately quantified by comprehensively considering vibration energy, motor performance, and transmission losses. This provides a scientific basis for subsequent initial locking force calculations, ensuring that the locking force adjustment conforms to actual working conditions and improving the adaptive capability and control accuracy of the vibration damping device.

[0133] S22. Add the first multiplier to the pre-acquired reference locking force to obtain the corresponding initial locking force.

[0134] In this embodiment of the invention, the sum of the first multiplier and the pre-acquired reference locking force is calculated to obtain the corresponding initial locking force.

[0135] It is worth mentioning that by adding the first multiplier to the reference locking force to obtain the initial locking force, the additional locking requirements brought about by vibration energy can be superimposed on the original reference locking force, so that the locking force can dynamically increase with the vibration intensity, making the initial locking force conform to the real-time vibration state of the line, ensuring the stable fit of the anti-vibration device, and improving the continuity and adaptability of locking control.

[0136] S23. The initial locking force is compared with the preset reference contact area to obtain the corresponding first ratio.

[0137] The reference contact area refers to the standard contact area between the soft rubber sleeve and the wire, which is determined by factors such as the structural design of the soft rubber sleeve and the diameter of the wire.

[0138] In this embodiment of the invention, the ratio between the initial locking force and the preset reference contact area is calculated to obtain the corresponding first ratio.

[0139] S24. Multiply the first ratio by the preset friction gain coefficient to obtain the corresponding soft rubber sleeve pressure.

[0140] The friction gain coefficient refers to a coefficient pre-calibrated based on the structural design and material properties of the diamond-shaped anti-slip grooves on the surface of the soft rubber sleeve.

[0141] In this embodiment of the invention, the multiplication between the first ratio and the preset friction gain coefficient is calculated to obtain the corresponding soft rubber sleeve pressure.

[0142] It is worth mentioning that by converting the initial locking force into the force per unit area based on the reference contact area, and then combining it with the friction gain coefficient to obtain the pressure of the soft rubber sleeve, the actual contact pressure between the soft rubber sleeve and the wire can be accurately quantified. This takes into account the locking force, contact area and friction characteristics, avoids pressure estimation deviation, provides a reliable basis for subsequent pressure threshold judgment and locking force optimization, and ensures that the anti-vibration device clamps stably without damaging the wire.

[0143] S25. When the pressure of the soft rubber sleeve is greater than or equal to the preset soft rubber sleeve pressure threshold, the preset locking force threshold is determined as the corresponding locking force.

[0144] The soft rubber sleeve pressure threshold refers to the maximum soft rubber sleeve pressure value that is preset to avoid damage to the wire.

[0145] In this embodiment of the invention, when the pressure of the soft rubber sleeve is greater than or equal to the preset soft rubber sleeve pressure threshold, it indicates that the vibration damping device has stopped working after adjusting the locking force to the preset locking force threshold, and the preset locking force threshold is determined as the corresponding locking force.

[0146] It is worth mentioning that when the pressure of the soft rubber sleeve is greater than or equal to the preset soft rubber sleeve pressure threshold, it automatically locks to the locking force threshold, which can effectively prevent excessive pressure from damaging the conductor, limit the maximum clamping force of the vibration damping device, take into account both vibration damping stability and line safety, realize the safe upper limit control of the locking force, and ensure the long-term reliable operation of the transmission line.

[0147] S26. When the pressure of the soft rubber sleeve is less than the pressure threshold of the soft rubber sleeve, the initial locking force is determined as the corresponding locking force.

[0148] In this embodiment of the invention, when the pressure of the soft rubber sleeve is less than the soft rubber sleeve pressure threshold, the initial locking force is used as the locking force at the current moment.

[0149] It should be noted that when the pressure of the soft rubber sleeve is less than the soft rubber sleeve pressure threshold, the initial locking force is directly used. The locking force can be dynamically adjusted according to the change of vibration energy to keep the anti-vibration device and the wire tightly attached, avoid insufficient locking leading to slippage failure, and take into account both the anti-vibration effect and the adaptive control capability.

[0150] It is worth mentioning that the initial locking force is dynamically calculated by combining vibration energy density, motor locking coefficient, and ratchet transmission efficiency. Then, the pressure of the soft rubber sleeve is converted by contact area and friction gain coefficient. The locking force is adaptively locked or maintained based on the soft rubber sleeve pressure threshold. This allows for real-time adjustment of the locking force according to changes in vibration intensity, ensuring stable contact of the vibration damping equipment, while avoiding damage to the conductors due to excessive pressure. It balances vibration damping effect and line safety, making the locking force control precise, reliable, and adaptive.

[0151] Step 203: Use monitoring data to adjust the early warning threshold and obtain the corresponding vibration amplitude early warning threshold.

[0152] Furthermore, the monitoring data also includes ambient wind speed and ambient temperature. Step 203 includes the following sub-steps:

[0153] S31. Perform difference processing on the ambient temperature and the preset temperature reference value to obtain the corresponding second difference value.

[0154] The temperature reference value refers to the reference temperature value pre-calibrated based on the design parameters of the transmission line, the conductor material tolerance requirements, and the safety operation standards.

[0155] In this embodiment of the invention, the difference between the ambient temperature and a preset temperature reference value is calculated to obtain the corresponding second difference.

[0156] It is worth mentioning that by calculating the difference between the ambient temperature and the benchmark value, the degree of temperature deviation from the standard operating conditions is quantified, the impact of temperature changes on line vibration characteristics is accurately captured, and a reliable basis is provided for the temperature correction of the subsequent warning threshold, thereby enhancing the adaptability of the warning standard to temperature fluctuations.

[0157] S32. Multiply the absolute value of the second difference with the preset first tuning coefficient to obtain the corresponding second multiplier.

[0158] The first setting coefficient refers to a coefficient pre-calibrated based on the vibration characteristics of the transmission line, the temperature sensitivity of the conductor material, and the requirements for safe operation. It is used to quantify the correction weight of temperature deviation on the benchmark warning threshold and has a value of 0.002.

[0159] In this embodiment of the invention, the product between the absolute value of the second difference and the preset first tuning coefficient is calculated to obtain the corresponding second product.

[0160] It is worth mentioning that by multiplying the absolute value of the temperature difference by the first setting coefficient, the correction amount of the temperature deviation on the warning threshold is quantified, avoiding the mutual cancellation of positive and negative temperature deviations, making the threshold adjustment more reasonable and accurate, and improving the adaptability of the warning standard to temperature changes.

[0161] S33. Multiply the ambient wind speed by the preset second tuning coefficient to obtain the corresponding third multiplication value.

[0162] The second setting factor is a factor pre-calibrated based on the wind resistance design parameters of the transmission line, the sensitivity of conductor vibration to wind speed, and the safety operation and maintenance standards, and its value is 0.1.

[0163] In this embodiment of the invention, the multiplication between the ambient wind speed and the preset second tuning coefficient is calculated to obtain the corresponding third multiplication value.

[0164] It is worth mentioning that by multiplying the ambient wind speed by the second tuning coefficient, the influence weight of wind speed on vibration amplitude is quantified, accurately reflecting the excitation intensity of light wind vibration, providing a quantitative basis for wind speed correction of the warning threshold, and enhancing the adaptability of the warning standard to changes in wind conditions.

[0165] S34. Add the preset third adjustment coefficient and the third multiplication value to obtain the corresponding first sum value.

[0166] The third setting coefficient refers to the coefficient that is pre-calibrated based on the overall adaptability of the transmission line early warning system and the basic weight of the impact of wind speed on vibration.

[0167] In this embodiment of the invention, the sum between the preset third adjustment coefficient and the third multiplication value is calculated to obtain the corresponding first sum.

[0168] It is worth mentioning that by adding the third adjustment coefficient to the third multiplication value corresponding to the wind speed to obtain the first sum, the basic numerical integration can be completed based on the fixed reference parameters and the wind speed influence, and the correction reference range under the wind speed condition can be reasonably defined, so that the subsequent threshold calculation has a stable and reliable numerical basis, and the calculation logic of the wind speed related correction link is regular and orderly.

[0169] S35. Difference between the first sum and the second multiplication value to obtain the corresponding third difference.

[0170] In this embodiment of the invention, the difference between the first sum and the second multiplication value is calculated to obtain the corresponding third difference.

[0171] It is worth mentioning that by calculating the difference between the first sum and the second multiplication, the influence of wind speed and the temperature correction are integrated, and the comprehensive influence deviation brought about by the two types of environmental factors is taken into account. The overall correction difference of the environmental conditions is accurately obtained, so that the environmental interference factors are uniformly quantified, laying a solid computational foundation for the accurate setting of the subsequent warning threshold.

[0172] S36. Multiply the third difference with the preset benchmark warning threshold to obtain the corresponding vibration amplitude warning threshold.

[0173] In this embodiment of the invention, the multiplication between the third difference and the preset benchmark warning threshold is calculated to obtain the corresponding vibration amplitude warning threshold.

[0174] It is worth mentioning that by linking ambient temperature, wind speed and benchmark warning thresholds, and dynamically adjusting the vibration amplitude warning threshold through multi-step difference, multiplication and summation operations, the line vibration characteristics under different temperature and wind conditions can be adapted in real time. This effectively eliminates the defects of fixed thresholds that are prone to false alarms and missed alarms in complex environments, making the warning standard fit the actual site conditions and improving the accuracy and environmental adaptability of vibration monitoring and warning.

[0175] Step 204: Calculate the ratio between the effective vibration amplitude and the vibration amplitude warning threshold to obtain the corresponding second ratio.

[0176] In this embodiment of the invention, the ratio between the effective vibration amplitude and the vibration amplitude warning threshold is calculated to obtain the corresponding second ratio.

[0177] It is worth mentioning that by calculating the ratio between the effective vibration amplitude and the vibration amplitude warning threshold, the deviation of the actual vibration amplitude from the warning threshold can be intuitively quantified, the extent of the vibration exceeding the standard can be clearly determined, and the vibration state can be standardized and quantitatively compared, providing an intuitive and effective quantitative reference indicator for subsequent multi-dimensional comprehensive early warning analysis.

[0178] Step 205: Based on the preset warning weights, perform warning analysis on the attenuation rate, locking force and second ratio to obtain the corresponding warning index.

[0179] Furthermore, step 205 includes the following sub-steps:

[0180] S41. The pre-obtained baseline attenuation rate is summed with the preset attenuation rate mutation threshold to obtain the corresponding second sum value.

[0181] The attenuation rate mutation threshold refers to the preset critical difference value used to identify conductor strand breakage defects, which characterizes the mutation range of the attenuation rate from the normal state to the abnormal state.

[0182] The reference attenuation rate refers to the basic attenuation rate value pre-calibrated based on the conductor material, structure, and ultrasonic wave propagation characteristics. It reflects the inherent energy loss of ultrasonic waves propagating in a normal, defect-free conductor.

[0183] In this embodiment of the invention, the sum between the pre-obtained baseline attenuation rate and the preset attenuation rate mutation threshold is calculated to obtain the corresponding second sum.

[0184] It is worth mentioning that by adding the baseline attenuation rate to the attenuation rate mutation threshold to determine the judgment benchmark value, the upper limit range of normal fluctuation of attenuation rate is reasonably defined, and the normal loss of conductors and abnormal mutation state are clearly distinguished. This establishes an accurate reference standard for subsequent attenuation rate abnormality judgment and improves the rigor of line damage hazard identification.

[0185] S42. Ratio the attenuation rate with the second sum to obtain the corresponding third ratio.

[0186] In this embodiment of the invention, the ratio between the attenuation rate and the second sum is calculated to obtain the corresponding third ratio.

[0187] It is worth mentioning that by calculating the ratio of the attenuation rate to the second sum, the deviation of the actual attenuation rate from the critical upper limit can be standardized and measured, the degree of abnormal conductor loss can be accurately quantified, the data evaluation scale can be unified, and standardized and effective quantitative data support can be provided for subsequent multi-parameter weighted assessment of potential risks.

[0188] S43. The locking force is compared with the preset locking force threshold to obtain the corresponding fourth ratio.

[0189] In this embodiment of the invention, the ratio between the locking force and the preset locking force threshold is calculated to obtain the corresponding fourth ratio.

[0190] It is worth mentioning that by calculating the ratio of the actual locking force to the locking force threshold, the current locking force relative to the safety limit can be intuitively quantified, the clamping force of the anti-vibration device can be clearly determined, the locking allowance and force margin can be accurately grasped, and the standardized quantitative evaluation of the locking state can be achieved, providing standardized and reliable force dimension reference data for comprehensive risk assessment.

[0191] S44. Based on the preset warning weights, perform a weighted calculation on the second ratio, the third ratio, and the fourth ratio to obtain the corresponding warning index.

[0192] In this embodiment of the invention, the second ratio, the third ratio, and the fourth ratio are weighted using preset warning weights to obtain the corresponding warning index.

[0193] It is worth mentioning that by correcting the baseline attenuation rate and the attenuation mutation threshold, calculating the ratio of the attenuation rate to the second sum, and then combining the preset weights to perform multi-indicator weighted fusion, the early warning index can be obtained. This can quantify the degree of abnormal deviation of each parameter, take into account the risk of conductor strand breakage, the locking status of vibration damping devices, and the situation of vibration amplitude exceeding the standard, avoid the one-sided judgment of a single parameter, make the calculation of the early warning index scientific, objective, and comprehensive, and improve the accuracy and reliability of risk identification.

[0194] Step 206: Use the early warning index to retrieve the preset list of early warning levels and match the corresponding monitoring results.

[0195] In this embodiment of the invention, a pre-defined list of warning levels is retrieved using a warning index, and the corresponding monitoring results are matched. For example, when the warning index is less than 0.8, the monitoring result is determined to be that the transmission line is operating normally. When the warning index is in the range of [0.8, 1.2], the monitoring result is determined to be a warning (i.e., the conductor vibration intensity exceeds the standard, or there is a suspected strand breakage defect, and the vibration damping device may face the risk of slippage, which needs to be investigated and confirmed in time to avoid the risk from expanding). When the warning index is greater than 1.2, the monitoring result is determined to be an emergency repair (i.e., the conductor has a clear strand breakage defect or a strong vibration risk, the anti-slip locking of the vibration damping device has been activated, and if not handled in time, it may lead to the expansion of strand breakage, slippage and detachment of the vibration damping hammer, or even a line breakage accident).

[0196] It is worth mentioning that by weighting and integrating multiple indicators such as the ratio of effective vibration amplitude to vibration amplitude warning threshold, attenuation rate, and locking force to generate a warning index, and then matching the warning level to obtain the monitoring results, the limitations of single indicator judgment are broken. It comprehensively reflects the vibration intensity, conductor damage risk and vibration damping device working status, making risk assessment more comprehensive and objective, and the graded warning clear and specific, which makes it easier for operation and maintenance personnel to quickly grasp the line safety status and accurately handle risks.

[0197] In this embodiment of the invention, monitoring data of the transmission line is acquired through a preset vibration damping device. Vibration characteristics are extracted from the monitoring data to obtain the effective vibration amplitude, vibration energy density, and attenuation rate. Based on the vibration energy density and a pre-acquired benchmark locking force, the locking force is predicted to obtain the corresponding locking force. A warning threshold is set using the monitoring data to obtain the corresponding vibration amplitude warning threshold. A vibration risk assessment is performed based on the effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold to obtain the corresponding monitoring results. This overcomes the technical problem of traditional transmission line operation and maintenance models relying on manual inspections, which makes it difficult to capture the vibration state and potential damage of the line in real time, leading to delayed accident warnings and reduced reliability of transmission line operation. Compared with traditional transmission line operation and maintenance methods, this invention acquires monitoring data of transmission lines through pre-set vibration damping equipment, extracts vibration characteristics from the monitoring data to obtain effective vibration amplitude, vibration energy density, and attenuation rate. Monitoring data of transmission lines can be collected without manual intervention. Vibration risk assessment is performed based on effective vibration amplitude, attenuation rate, locking force, and vibration amplitude warning threshold to obtain corresponding monitoring results. This allows for real-time risk assessment of transmission lines. Compared with the single-indicator judgment of existing technologies, it can more comprehensively reflect the safety status of the line and improve the reliability of transmission line operation.

[0198] Please see Figure 4 , Figure 4 This is a structural block diagram of an online monitoring device for micro-wind vibration of power transmission lines provided in Embodiment 3 of the present invention.

[0199] This invention provides an online monitoring device for micro-wind vibration of power transmission lines, comprising:

[0200] The acquisition module 301 is used to acquire monitoring data of the transmission line through a preset vibration damping device, extract vibration characteristics from the monitoring data, and obtain the effective vibration amplitude, vibration energy density and attenuation rate.

[0201] The locking force prediction module 302 is used to predict the locking force based on the vibration energy density and the pre-acquired reference locking force, and obtain the corresponding locking force.

[0202] The tuning module 303 is used to tune the early warning threshold using monitoring data to obtain the corresponding vibration amplitude early warning threshold.

[0203] The early warning module 304 is used to assess vibration risk based on effective vibration amplitude, attenuation rate, locking force and vibration amplitude early warning threshold, and obtain corresponding monitoring results.

[0204] Furthermore, the monitoring data includes acceleration signals, transmitted wave amplitude, and reflected wave amplitude. The acquisition module 301 includes:

[0205] The noise reduction submodule is used to denoise the acceleration signal to obtain the corresponding target acceleration signal, and input the target acceleration signal into a preset vibration amplitude function to obtain the corresponding effective vibration amplitude.

[0206] The vibration feature extraction submodule is used to perform a fast Fourier transform on the target acceleration signal to obtain the corresponding frequency amplitude data.

[0207] Input the frequency amplitude data into the preset energy density function to obtain the corresponding vibration energy density;

[0208] The difference between the transmitted wave amplitude and the reflected wave amplitude is processed to obtain the corresponding first difference value;

[0209] The attenuation rate is obtained by comparing the first difference with the transmitted wave amplitude.

[0210] Furthermore, the locking force prediction module 302 includes:

[0211] The first locking force prediction submodule is used to multiply the vibration energy density, the preset motor locking coefficient and the preset ratchet mechanism transmission efficiency to obtain the corresponding first multiplication value.

[0212] The first multiplier is added to the pre-acquired reference locking force to obtain the corresponding initial locking force;

[0213] The initial locking force is compared with the preset reference contact area to obtain the corresponding first ratio.

[0214] The first ratio is multiplied by the preset friction gain coefficient to obtain the corresponding soft rubber sleeve pressure.

[0215] The second locking force prediction submodule is used to determine the preset locking force threshold as the corresponding locking force when the soft rubber sleeve pressure is greater than or equal to the preset soft rubber sleeve pressure threshold.

[0216] When the pressure of the soft rubber sleeve is less than the soft rubber sleeve pressure threshold, the initial locking force is determined as the corresponding locking force.

[0217] Furthermore, the monitoring data also includes ambient wind speed and ambient temperature. The tuning module 303 includes:

[0218] The first tuning submodule is used to perform difference processing between the ambient temperature and the preset temperature reference value to obtain the corresponding second difference value;

[0219] The absolute value of the second difference is multiplied by the preset first tuning coefficient to obtain the corresponding second multiplier value;

[0220] The second tuning submodule is used to multiply the ambient wind speed by a preset second tuning coefficient to obtain the corresponding third multiplication value.

[0221] The preset third adjustment coefficient and the third multiplication value are summed to obtain the corresponding first sum value;

[0222] The difference between the first sum and the second multiplication is calculated to obtain the corresponding third difference.

[0223] The third difference is multiplied by the preset baseline warning threshold to obtain the corresponding vibration amplitude warning threshold.

[0224] Furthermore, the early warning module 304 includes:

[0225] The first early warning submodule is used to process the ratio between the effective vibration amplitude and the vibration amplitude early warning threshold to obtain the corresponding second ratio.

[0226] The second early warning submodule is used to perform early warning analysis on the attenuation rate, locking force and second ratio based on preset early warning weights, and obtain the corresponding early warning index;

[0227] The third early warning submodule is used to retrieve a preset list of early warning levels using an early warning index and match the corresponding monitoring results.

[0228] Furthermore, the second early warning submodule includes:

[0229] The summation unit is used to sum the pre-acquired baseline attenuation rate with a preset attenuation rate mutation threshold to obtain the corresponding second sum value;

[0230] The first ratio unit is used to ratio the attenuation rate with the second sum to obtain the corresponding third ratio.

[0231] The second ratio unit is used to perform ratio processing on the locking force and the preset locking force threshold to obtain the corresponding fourth ratio;

[0232] The weighting unit is used to perform weighted calculations on the second ratio, the third ratio, and the fourth ratio based on preset warning weights to obtain the corresponding warning index.

[0233] Please see Figure 5 , Figure 5 This is a structural block diagram of an electronic device provided in Embodiment 4 of the present invention.

[0234] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402. The memory 401 stores a computer program. When the computer program is executed by the processor 402, the processor 402 performs the online monitoring method for micro-wind vibration of transmission lines as described in any of the above embodiments.

[0235] Memory 401 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 401 has storage space 403 for program code 413 for performing any of the method steps described above. For example, storage space 403 for program code may include individual program codes 413 for implementing the various steps in the methods described above. This program code may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When run by a computing processing device, this code causes the computing processing device to perform the various steps in the methods described above. This program code may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When this code is run by a computing processing device, it causes the device to perform the various steps in the online monitoring method for micro-wind vibration of transmission lines described above.

[0236] Embodiment 5 of the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the online monitoring method for micro-wind vibration of transmission lines as described in any of the above embodiments.

[0237] Embodiment 6 of the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer performs the online monitoring method for micro-wind vibration of transmission lines as described in any of the above embodiments.

[0238] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0239] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0240] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0241] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0242] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0243] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for online monitoring of micro-wind vibration in transmission lines, characterized in that, include: Monitoring data of the transmission line is obtained through a pre-set vibration damping device. Vibration characteristics are extracted from the monitoring data to obtain the effective vibration amplitude, vibration energy density and attenuation rate. Based on the vibration energy density and the pre-acquired reference locking force, the locking force is predicted to obtain the corresponding locking force; The monitoring data is used to adjust the early warning threshold to obtain the corresponding vibration amplitude early warning threshold; Vibration risk assessment is performed based on the effective vibration amplitude, the attenuation rate, the locking force, and the vibration amplitude warning threshold to obtain the corresponding monitoring results.

2. The online monitoring method for micro-wind vibration of transmission lines according to claim 1, characterized in that, The monitoring data includes acceleration signals, emitted wave amplitude, and reflected wave amplitude. The step of extracting vibration features from the monitoring data to obtain effective vibration amplitude, vibration energy density, and attenuation rate includes: The acceleration signal is denoised to obtain the corresponding target acceleration signal, and the target acceleration signal is input into a preset vibration amplitude function to obtain the corresponding effective vibration amplitude. The target acceleration signal is subjected to a fast Fourier transform to obtain the corresponding frequency amplitude data; The frequency amplitude data is input into a preset energy density function to obtain the corresponding vibration energy density; The difference between the transmitted wave amplitude value and the reflected wave amplitude value is processed to obtain the corresponding first difference value; The first difference is compared with the transmitted wave amplitude to obtain the corresponding attenuation rate.

3. The online monitoring method for micro-wind vibration of transmission lines according to claim 1, characterized in that, The step of predicting the locking force based on the vibration energy density and the pre-acquired reference locking force to obtain the corresponding locking force includes: The vibration energy density, the preset motor locking coefficient, and the preset ratchet mechanism transmission efficiency are multiplied to obtain the corresponding first multiplication value; The first multiplier is added to the pre-acquired reference locking force to obtain the corresponding initial locking force; The initial locking force is compared with the preset reference contact area to obtain the corresponding first ratio. The first ratio is multiplied by a preset friction gain coefficient to obtain the corresponding soft rubber sleeve pressure. When the pressure of the soft rubber sleeve is greater than or equal to the preset soft rubber sleeve pressure threshold, the preset locking force threshold is determined as the corresponding locking force. When the pressure of the soft rubber sleeve is less than the soft rubber sleeve pressure threshold, the initial locking force is determined as the corresponding locking force.

4. The online monitoring method for micro-wind vibration of transmission lines according to claim 1, characterized in that, The monitoring data also includes ambient wind speed and ambient temperature. The step of using the monitoring data to adjust the early warning threshold and obtain the corresponding vibration amplitude early warning threshold includes: The difference between the ambient temperature and the preset temperature reference value is processed to obtain the corresponding second difference value; The absolute value of the second difference is multiplied by a preset first adjustment coefficient to obtain the corresponding second multiplier value; The environmental wind speed is multiplied by a preset second tuning coefficient to obtain the corresponding third multiplication value; The preset third adjustment coefficient is summed with the third multiplication value to obtain the corresponding first sum value; The difference between the first sum and the second multiplication value is calculated to obtain the corresponding third difference value; The third difference is multiplied by a preset baseline warning threshold to obtain the corresponding vibration amplitude warning threshold.

5. The online monitoring method for micro-wind vibration of transmission lines according to claim 1, characterized in that, The step of conducting a vibration risk assessment based on the effective vibration amplitude, the attenuation rate, the locking force, and the vibration amplitude warning threshold to obtain the corresponding monitoring results includes: The effective vibration amplitude is compared with the vibration amplitude warning threshold to obtain the corresponding second ratio. Based on preset warning weights, the attenuation rate, the locking force, and the second ratio are analyzed to obtain the corresponding warning index; The pre-defined warning index is used to retrieve a list of pre-defined warning levels and match the corresponding monitoring results.

6. The online monitoring method for micro-wind vibration of transmission lines according to claim 5, characterized in that, The step of performing early warning analysis on the attenuation rate, the locking force, and the second ratio based on preset early warning weights to obtain the corresponding early warning index includes: The pre-obtained baseline attenuation rate is summed with the preset attenuation rate mutation threshold to obtain the corresponding second sum value; The ratio of the attenuation rate to the second sum is processed to obtain the corresponding third ratio; The locking force is compared with a preset locking force threshold to obtain a corresponding fourth ratio. The second ratio, the third ratio, and the fourth ratio are weighted according to preset warning weights to obtain the corresponding warning index.

7. An online monitoring device for micro-wind vibration of transmission lines, characterized in that, include: The acquisition module is used to acquire monitoring data of the transmission line through a preset vibration damping device, extract vibration characteristics from the monitoring data, and obtain the effective vibration amplitude, vibration energy density and attenuation rate. The locking force prediction module is used to predict the locking force based on the vibration energy density and the pre-acquired reference locking force, and obtain the corresponding locking force. The tuning module is used to tune the warning threshold using the monitoring data to obtain the corresponding vibration amplitude warning threshold. The early warning module is used to assess vibration risk based on the effective vibration amplitude, the attenuation rate, the locking force, and the vibration amplitude early warning threshold, and obtain corresponding monitoring results.

8. An electronic device, characterized in that, The method includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the online monitoring method for micro-wind vibration of transmission lines as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the online monitoring method for micro-wind vibration of transmission lines as described in any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, wherein when the program instructions are executed by a computer, the computer performs the online monitoring method for micro-wind vibration of transmission lines as described in any one of claims 1-6.

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