Method and system for monitoring and analyzing icing galloping of high-voltage line, terminal and medium

Abstract

The invention discloses a method, a system, a terminal and a medium for monitoring and analyzing icing galloping of a high-voltage line, and relates to the technical field of electric power safety, and the key points of the technical scheme are as follows: actual vibration signals are collected at relatively stable monitoring positions close to a suspension point in the high-voltage line, the influence of the torque effect is relatively small, and the monitoring accuracy is high. The vibration condition of the lowest sag point is deduced reversely according to a pre-constructed amplitude fitting function and a pre-constructed wavelength fitting function, and meanwhile, resistance and lift force determined by a wind attack angle and a wind speed value in wind speed and wind direction data are combined, and the consistency of the resultant force direction of the resistance, lift force and gravity of the lowest sag point and the displacement direction of a corresponding vibration displacement section is taken as a target. According to the method, more real-time data does not need to be collected, the pre-estimated icing thickness can be accurately and reliably determined through simple mechanical analysis, and the implementation difficulty is low.

Description

Technical Field

[0001] The present invention relates to the field of electric power safety technology, and more specifically, to a method, system, terminal and medium for monitoring and analyzing ice dancing of high-voltage lines. Background Art

[0002] The ice-covered dancing of high-voltage lines refers to the phenomenon of large-amplitude low-frequency self-excited vibration caused by ice-covered lines on the surface of lines under specific meteorological conditions, which leads to unstable aerodynamic parameters and a large-scale low-frequency self-excited vibration under the action of wind. Ice-covered lines can change the physical properties of lines, such as increasing the weight of lines and changing the aerodynamic properties of lines. Therefore, ice-covered dancing of high-voltage lines may cause damage to power supply lines, such as line breaks, tower collapses and other serious accidents, affecting the stable operation of the power grid and power supply safety. Through monitoring, timely detection and measures can be taken to reduce the occurrence of accidents. High-voltage line ice-covered dancing monitoring is crucial to ensuring the safe, stable and reliable operation of power systems, and is an indispensable part of the power industry.

[0003] At present, the methods for monitoring the ice dancing of high-voltage lines mainly include monitoring methods based on image recognition technology and monitoring methods based on supervised learning algorithms. For monitoring methods based on image recognition technology, some areas with complex terrain often have heavy fog in winter, and video surveillance lenses are prone to ice formation, making it difficult for the camera to accurately and clearly capture line ice images, resulting in poor accuracy and reliability of high-voltage line ice dancing monitoring. Monitoring methods based on supervised learning algorithms generally require the collection of a large amount of meteorological data. In actual working conditions, high-voltage lines are often far away from meteorological stations, and the prediction accuracy of ice thickness in areas adjacent to line channels is poor.

[0004] Therefore, how to research and design a high-voltage line ice dancing monitoring and analysis method, system, terminal and medium that can overcome the above-mentioned defects is a problem that we urgently need to solve. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a high-voltage line ice dance monitoring and analysis method, system, terminal and medium. This method does not require the collection of a large amount of real-time data, and can accurately and reliably determine the estimated ice thickness through simple mechanical analysis, and is easy to implement.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: In a first aspect, a method for monitoring and analyzing ice dancing of a high-voltage line is provided, comprising the following steps: Simulate and construct the amplitude fitting function to characterize the amplitude change caused by vibration transmission of high-voltage lines in the state of ice dancing, and the wavelength fitting function to characterize the wavelength change caused by vibration transmission; Collect the actual vibration signal of the monitoring position in the high-voltage line and the wind speed and direction data at the lowest point of the sag. The actual vibration signal includes vertical vibration signal, lateral vibration signal and horizontal vibration signal; The estimated vibration signal at the lowest point of the sag is obtained by combining the actual vibration signal, the horizontal length of the line between the monitoring position and the lowest point of the sag, the amplitude fitting function and the wavelength fitting function; Divide the displacement direction of the lowest point of the sag in each vibration displacement segment from the estimated vibration signal; Determine the wind attack angle and wind speed value according to the wind speed and direction data, and determine the drag and lift at the lowest point of the sag according to the wind attack angle and wind speed value; With the goal of keeping the combined force direction of drag, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement segment, the estimated ice thickness at the lowest point of the sag corresponding to the minimum gravity error is solved.

[0007] Furthermore, the construction process of the amplitude fitting function is specifically as follows: Collect the amplitude value of each line position when simulating the high-voltage line dancing under different preset ice thicknesses, and convert the amplitude value of each line position into a first relative parameter, which is the ratio of the amplitude value of each line position to the amplitude value corresponding to the monitoring position; The amplitude fitting function corresponding to the preset ice thickness is obtained by fitting the line position as the horizontal coordinate and the first relative parameter corresponding to the amplitude value of the line position as the vertical coordinate; And / or, the construction process of the wavelength fitting function is specifically as follows: The wavelength of each changing vibration wave when the simulated high-voltage line dances under different preset ice thicknesses is collected, and the wavelength of each changing vibration wave is converted into a second relative parameter, which is the ratio of the wavelength of each changing vibration wave to the wavelength of the changing vibration wave corresponding to the monitoring position; The wavelength fitting function corresponding to the preset ice thickness is obtained by fitting with the serial number of the changing vibration wave as the horizontal coordinate and the second relative parameter corresponding to the wavelength of the changing vibration wave as the vertical coordinate.

[0008] Furthermore, the expression of the amplitude fitting function is specifically: ; in, Indicates that the high voltage line is horizontal Upper line position The amplitude variation coefficient at ; Indicates that the preset ice thickness of the high-voltage line is When in horizontal The amplitude fitting function constructed by the above simulation; And / or, the expression of the wavelength fitting function is specifically: ; in, Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates that the preset ice thickness of the high-voltage line is When in horizontal The wavelength fitting function constructed by the simulation above.

[0009] Furthermore, the estimated vibration signal solution process of the sag lowest point is specifically as follows: The horizontal length of the line between the monitoring position and the lowest point of the sag is input into the amplitude fitting function to calculate the amplitude variation coefficient of the lowest point of the sag; The estimated amplitude of the estimated vibration signal is calculated by the product of the actual amplitude in the actual vibration signal and the amplitude variation coefficient; The wavelength of the changing vibration wave corresponding to the lowest point of the sag is obtained based on the wavelength fitting function, the actual wavelength at the monitoring position, and the horizontal length of the line between the monitoring position and the lowest point of the sag; The phase difference is determined by the position of the lowest point of the sag in the corresponding changing vibration wave, and the estimated phase of the estimated vibration signal is calculated in combination with the initial phase in the actual vibration signal; Keeping the vibration frequency unchanged, the estimated vibration signal of the lowest point of the sag is constructed by combining the estimated amplitude and the estimated phase.

[0010] Furthermore, the estimated vibration signal solution expression of the lowest point of the sag is: ; in, Indicates the actual wavelength at the monitoring location; Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates the horizontal length of the line between the monitoring position and the lowest point of the sag; Indicates that the high voltage line is horizontal The phase difference on Indicates the changing vibration wave number of the lowest point of sag on the high-voltage line; Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates the actual vibration signal at the monitoring location; Represents the actual amplitude in the actual vibration signal; represents the angular frequency; Indicates time; represents the initial phase; Indicates that the lowest point of the sag is in the horizontal direction. Vibration signal on Indicates that the high voltage line is horizontal Amplitude variation coefficient of the lowest point of the upper sag; The estimated vibration signal indicating the lowest point of the sag; Indicates that the lowest point of the sag is horizontal Vibration signal on Indicates that the lowest point of the sag is vertical The vibration signal on.

[0011] Furthermore, the process of determining the displacement direction of the vibration displacement section is specifically as follows: The displacement signal is obtained by projecting the estimated vibration signal onto the transverse plane, where the transverse plane is a reference plane constructed by the vertical and transverse directions; The peak points and trough points in the displacement signal are screened out, and the displacement segment between adjacent peak points and trough points is used as the vibration displacement segment, and the direction from the endpoint in front in time to the endpoint in back in time in the vibration displacement segment is used as the displacement direction.

[0012] Furthermore, the process of solving the estimated ice thickness at the lowest sag point corresponding to the minimum gravity error is specifically as follows: The preset ice thickness corresponding to the amplitude fitting function and the wavelength fitting function selected by solving the estimated vibration signal matches the corresponding preset gravity; The estimated gravity at the lowest point of the sag is obtained by keeping the direction of the combined force of the drag, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement section; The corresponding gravity error is calculated by the absolute value of the difference between the preset gravity and the estimated gravity, and the preset gravity corresponding to the minimum gravity error among all gravity errors is selected; The preset ice thickness corresponding to the selected preset gravity is used as the estimated ice thickness at the lowest point of the sag.

[0013] In a second aspect, a high-voltage line ice dancing monitoring and analysis system is provided, the system is used to implement a high-voltage line ice dancing monitoring and analysis method as described in any one of the first aspects, including: A simulation analysis module is used to simulate and construct an amplitude fitting function to characterize the amplitude change caused by vibration transmission of a high-voltage line in an ice-covered dancing state, as well as a wavelength fitting function to characterize the wavelength change caused by the vibration transmission; A data acquisition module is used to collect the actual vibration signal of the monitoring position in the high-voltage line and the wind speed and direction data at the lowest point of the sag. The actual vibration signal includes a vertical vibration signal, a lateral vibration signal and a horizontal vibration signal; The vibration tracing module is used to combine the actual vibration signal, the horizontal length of the line between the monitoring position and the lowest point of the sag, the amplitude fitting function and the wavelength fitting function to obtain the estimated vibration signal of the lowest point of the sag; A vibration segmentation module is used to divide the displacement direction of the lowest point of the sag in each vibration displacement segment from the estimated vibration signal; The aerodynamic analysis module is used to determine the wind attack angle and wind speed value according to the wind speed and direction data, and determine the drag and lift at the lowest point of the sag according to the wind attack angle and wind speed value; The ice estimation module is used to solve the estimated ice thickness at the lowest point of the sag corresponding to the minimum gravity error, with the goal of keeping the direction of the combined force of resistance, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement segment.

[0014] In a third aspect, a computer terminal is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for monitoring and analyzing ice dancing of a high-voltage line as described in any one of the first aspects is implemented.

[0015] In a fourth aspect, a computer-readable medium is provided, on which a computer program is stored, and the computer program is executed by a processor to implement a high-voltage line ice dancing monitoring and analysis method as described in any one of the first aspects.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. A high-voltage line ice dancing monitoring and analysis method provided by the present invention collects actual vibration signals at a relatively stable monitoring position near the suspension point in the high-voltage line, and is less affected by the torque effect. The vibration condition of the lowest point of the sag is inversely deduced based on the pre-constructed amplitude fitting function and wavelength fitting function. At the same time, the resistance and lift determined by the wind attack angle and wind speed value in the wind speed and direction data are combined, and the direction of the combined force of the resistance, lift and gravity at the lowest point of the sag is kept consistent with the displacement direction of the corresponding vibration displacement section. The estimated ice thickness at the lowest point of the sag corresponding to the minimum gravity error is solved. This method does not require the collection of a large amount of real-time data, and the estimated ice thickness can be accurately and reliably determined through simple mechanical analysis, and the implementation difficulty is low; 2. When establishing the amplitude fitting function and the wavelength fitting function, the present invention converts the amplitude value of each line position and the wavelength of each changing vibration wave into relative parameters, so as to facilitate direct deformation processing based on the expression of the actual vibration signal, thereby quickly obtaining the expression of the estimated vibration signal; 3. When dividing the vibration displacement segments, the present invention takes into account that the vertical direction is the main vibration direction of the high-voltage line, while the vibration degree in the horizontal direction is relatively weak. Therefore, the estimated vibration signal is projected onto the horizontal plane to obtain the displacement signal, and the displacement direction of each vibration displacement segment is determined according to the peak points and trough points in the displacement signal, which can reduce the error influence of the mechanical analysis process and effectively improve the accuracy of the solution of the estimated ice thickness. 4. When solving the estimated ice thickness at the lowest point of the sag, the present invention traverses and analyzes the amplitude fitting function and the wavelength fitting function under different preset ice thicknesses to obtain the preset gravity corresponding to the minimum gravity error, and uses the preset ice thickness corresponding to the selected preset gravity as the estimated ice thickness at the lowest point of the sag, which effectively ensures the rationality of the selection of the amplitude fitting function and the wavelength fitting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 is a flow chart of Embodiment 1 of the present invention; Figure 2 It is a system block diagram in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0019] Embodiment 1: A method for monitoring and analyzing ice dancing of high-voltage lines, such as Figure 1 As shown, the following steps are included: S1: Simulate and construct the amplitude fitting function and wavelength fitting function of the amplitude change caused by the vibration transmission of the high-voltage line in the state of ice dancing, which are caused by the change of wavelength; S2: Collect the actual vibration signal of the monitoring position in the high-voltage line and the wind speed and direction data at the lowest point of the sag. The actual vibration signal includes vertical vibration signal, lateral vibration signal and horizontal vibration signal; S3: The estimated vibration signal at the lowest point of the sag is obtained by combining the actual vibration signal, the horizontal length of the line between the monitoring position and the lowest point of the sag, the amplitude fitting function and the wavelength fitting function; S4: Divide the displacement direction of the lowest point of the sag in each vibration displacement segment from the estimated vibration signal; S5: determining the wind attack angle and wind speed value according to the wind speed and wind direction data, and determining the drag and lift at the lowest point of the sag according to the wind attack angle and wind speed value; S6: With the goal of keeping the combined force direction of the drag, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement segment, the estimated ice thickness at the lowest point of the sag corresponding to the minimum gravity error is solved.

[0020] In step S1, the simulation construction of the amplitude fitting function and the wavelength fitting function can be carried out by collecting data through wind tunnel tests, or by using ANSYS software for simulation analysis.

[0021] Taking ANSYS software as an example, the structural parameters of high-voltage lines are established through finite element analysis methods, including but not limited to data such as transmission tower height, line span, and line sag.

[0022] The construction process of the amplitude fitting function is specifically as follows: collecting the amplitude value of each line position when the simulated high-voltage line is dancing under different preset ice cover thicknesses, and converting the amplitude value of each line position into a first relative parameter, which is the ratio of the amplitude value of each line position to the amplitude value corresponding to the monitoring position; using the line position as the horizontal coordinate and the first relative parameter corresponding to the amplitude value of the line position as the vertical coordinate to fit the amplitude fitting function corresponding to the preset ice cover thickness.

[0023] For example, the amplitude value of line position 1 is 2m, and the amplitude value of the monitoring position is 0.4m, then the first relative parameter of line position 1 is 5.

[0024] The expression of the amplitude fitting function is as follows: ; in, Indicates that the high voltage line is horizontal Upper line position Amplitude variation coefficient at ; Indicates that the preset ice thickness of the high-voltage line is When in horizontal Amplitude fitting function constructed in the above simulation.

[0025] It should be noted that the amplitude value of the line position may not be converted into the first relative parameter, but the amplitude value of the line position may be directly sampled and fitted with a curve by the least square method, which is not limited here.

[0026] The specific process of constructing the wavelength fitting function is as follows: collecting the wavelengths of each changing vibration wave when the simulated high-voltage line dances under different preset ice cover thicknesses, and converting the wavelength of each changing vibration wave into a second relative parameter, the second relative parameter being the ratio of the wavelength of each changing vibration wave to the wavelength of the changing vibration wave corresponding to the monitoring position; using the serial number of the changing vibration wave as the horizontal coordinate and the second relative parameter corresponding to the wavelength of the changing vibration wave as the vertical coordinate to obtain the wavelength fitting function corresponding to the preset ice cover thickness.

[0027] The specific expression of the wavelength fitting function is: ; in, Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates that the preset ice thickness of the high-voltage line is When in horizontal The wavelength fitting function constructed by the simulation above.

[0028] Similarly, the wavelength of the changing vibration wave can also be converted into the second relative parameter without changing the wavelength of the vibration wave, and the least square method can be directly sampled to perform curve fitting on the wavelength of the changing vibration wave, which is not limited here. In addition, corresponding amplitude fitting functions and wavelength fitting functions are constructed in the vertical, lateral and horizontal directions.

[0029] When establishing the amplitude fitting function and the wavelength fitting function, the present invention converts the amplitude value of each line position and the wavelength of each changing vibration wave into relative parameters, so as to directly perform deformation processing on the basis of the expression of the actual vibration signal, thereby quickly obtaining the expression of the estimated vibration signal.

[0030] In step S2, the monitoring position needs to ensure that effective vibration signals can be taken, which is generally 5-20m away from the suspension point. Vibration source tracing processing is required for vertical vibration signals, lateral vibration signals and horizontal vibration signals.

[0031] In step S3, the solution process of the estimated vibration signal at the lowest point of the sag is specifically as follows: the horizontal length of the line between the monitoring position and the lowest point of the sag is input into the amplitude fitting function to calculate the amplitude variation coefficient of the lowest point of the sag; the estimated amplitude of the estimated vibration signal is calculated by the product of the actual amplitude in the actual vibration signal and the amplitude variation coefficient; the wavelength of the changing vibration wave corresponding to the lowest point of the sag is solved according to the wavelength fitting function, the actual wavelength of the monitoring position and the horizontal length of the line between the monitoring position and the lowest point of the sag; the phase difference is determined by the position of the lowest point of the sag in the corresponding changing vibration wave, and the estimated phase of the estimated vibration signal is calculated in combination with the initial phase in the actual vibration signal; the vibration frequency is kept unchanged, and the estimated vibration signal of the lowest point of the sag is constructed by combining the estimated amplitude and the estimated phase.

[0032] Taking the amplitude fitting function and wavelength fitting function constructed in step S1 as an example, the estimated vibration signal solution expression at the lowest point of the sag is: ; in, Indicates the actual wavelength at the monitoring location; Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates the horizontal length of the line between the monitoring position and the lowest point of the sag; Indicates that the high voltage line is horizontal The phase difference on Indicates the changing vibration wave number of the lowest point of sag on the high-voltage line; Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates the actual vibration signal at the monitoring location; Represents the actual amplitude in the actual vibration signal; represents the angular frequency; Indicates time; represents the initial phase; Indicates that the lowest point of the sag is in the horizontal direction. Vibration signal on Indicates that the high voltage line is horizontal Amplitude variation coefficient of the lowest point of the upper sag; The estimated vibration signal indicating the lowest point of the sag; Indicates that the lowest point of the sag is horizontal Vibration signal on Indicates that the lowest point of the sag is vertical The vibration signal on.

[0033] In step S4, the process of determining the displacement direction of the vibration displacement segment is specifically as follows: the estimated vibration signal is projected onto the transverse vertical plane to obtain the displacement signal, and the transverse vertical plane is a reference plane constructed by the vertical and transverse directions; the peak points and trough points in the displacement signal are screened out, and the displacement segment between adjacent peak points and trough points is taken as the vibration displacement segment, and the direction from the endpoint in front in time to the endpoint in back in time in the vibration displacement segment is taken as the displacement direction.

[0034] When dividing the vibration displacement segments, the present invention takes into account that the vertical direction is the most important vibration direction of the high-voltage line, while the vibration degree in the horizontal direction is relatively weak. Therefore, the estimated vibration signal is projected onto the horizontal plane to obtain the displacement signal, and the displacement direction of each vibration displacement segment is determined based on the peak points and trough points in the displacement signal. This can reduce the error influence of the mechanical analysis process and effectively improve the accuracy of the solution for the estimated ice thickness.

[0035] In step S5, the corresponding drag coefficient and lift coefficient may be matched from a database according to the wind attack angle. The drag coefficient and lift coefficient may be obtained through simulation analysis or wind tunnel testing.

[0036] In step S6, the process of solving the estimated ice thickness at the lowest point of the sag corresponding to the minimum gravity error is specifically as follows: matching the preset gravity with the preset ice thickness corresponding to the amplitude fitting function and the wavelength fitting function selected for solving the estimated vibration signal; solving the estimated gravity at the lowest point of the sag by keeping the direction of the combined force of the resistance, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement segment; calculating the corresponding gravity error with the absolute value of the difference between the preset gravity and the estimated gravity, and selecting the preset gravity corresponding to the minimum gravity error among all gravity errors; and taking the preset ice thickness corresponding to the selected preset gravity as the estimated ice thickness at the lowest point of the sag.

[0037] When solving the estimated ice thickness at the lowest point of the sag, the present invention traverses and analyzes the amplitude fitting function and the wavelength fitting function under different preset ice thicknesses to obtain the preset gravity corresponding to the minimum gravity error, and uses the preset ice thickness corresponding to the selected preset gravity as the estimated ice thickness at the lowest point of the sag, effectively ensuring the rationality of the selection of the amplitude fitting function and the wavelength fitting function.

[0038] It should be noted that the lift is perpendicular to the direction of application of the wind load, while the drag is in the same direction as the direction of application of the wind load, and the wind attack angle is the angle between the direction of application of the wind load and the axis direction of the high-voltage line.

[0039] Embodiment 2: A high-voltage line ice dancing monitoring and analysis system, the system is used to implement a high-voltage line ice dancing monitoring and analysis method as described in Embodiment 1, such as Figure 2 As shown, it includes a simulation analysis module, a data acquisition module, a vibration source tracing module, a vibration segmentation module, an aerodynamic analysis module and an ice estimation module.

[0040] Among them, the simulation and analysis module is used to simulate and construct an amplitude fitting function and a wavelength fitting function to characterize the amplitude change caused by vibration transmission of the high-voltage line in the ice-covered dancing state; the data acquisition module is used to collect the actual vibration signal of the monitoring position in the high-voltage line and the wind speed and direction data of the lowest point of the sag, and the actual vibration signal includes a vertical vibration signal, a lateral vibration signal and a horizontal vibration signal; the vibration tracing module is used to combine the actual vibration signal, the horizontal length of the line between the monitoring position and the lowest point of the sag, the amplitude fitting function and the wavelength fitting function to solve the estimated vibration signal of the lowest point of the sag; the vibration segmentation module is used to divide the displacement direction of the lowest point of the sag in each vibration displacement segment from the estimated vibration signal; the aerodynamic analysis module is used to determine the wind attack angle and wind speed value according to the wind speed and direction data, and determine the resistance and lift of the lowest point of the sag according to the wind attack angle and wind speed value; the ice estimation module is used to solve the estimated ice thickness of the lowest point of the sag corresponding to the minimum gravity error with the goal of keeping the direction of the combined force of the resistance, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement segment.

[0041] The present invention also records a computer terminal, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, a method for monitoring and analyzing ice dancing of a high-voltage line as described in Example 1 is implemented.

[0042] The present invention also records a computer-readable medium on which a computer program is stored. The computer program is executed by a processor to implement a high-voltage line ice dancing monitoring and analysis method as described in Example 1.

[0043] Working principle: The present invention collects actual vibration signals at a relatively stable monitoring position near the suspension point in the high-voltage line, and is less affected by the torque effect. The vibration condition of the lowest point of the sag is inversely deduced based on the pre-constructed amplitude fitting function and wavelength fitting function. At the same time, the resistance and lift determined by the wind attack angle and wind speed value in the wind speed and direction data are combined. The goal is to keep the direction of the combined force of resistance, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement segment. The estimated ice thickness at the lowest point of the sag corresponding to the minimum gravity error is solved. This method does not require the collection of a large amount of real-time data, and the estimated ice thickness can be accurately and reliably determined through simple mechanical analysis, and the implementation difficulty is low.

[0044] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0045] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0046] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0047] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0048] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for monitoring and analyzing ice dancing of high-voltage lines, characterized in that: The following steps are involved: Simulate and construct the amplitude fitting function to characterize the amplitude change caused by vibration transmission of high-voltage lines in the state of ice dancing, and the wavelength fitting function to characterize the wavelength change caused by vibration transmission; Collect the actual vibration signal of the monitoring position in the high-voltage line and the wind speed and direction data at the lowest point of the sag. The actual vibration signal includes vertical vibration signal, lateral vibration signal and horizontal vibration signal; The estimated vibration signal at the lowest point of the sag is obtained by combining the actual vibration signal, the horizontal length of the line between the monitoring position and the lowest point of the sag, the amplitude fitting function and the wavelength fitting function; Divide the displacement direction of the lowest point of the sag in each vibration displacement segment from the estimated vibration signal; Determine the wind attack angle and wind speed value according to the wind speed and direction data, and determine the drag and lift at the lowest point of the sag according to the wind attack angle and wind speed value; With the goal of keeping the combined force direction of drag, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement segment, the estimated ice thickness at the lowest point of the sag corresponding to the minimum gravity error is solved.

2. A method for monitoring and analyzing ice dancing of high-voltage lines according to claim 1, characterized in that: The construction process of the amplitude fitting function is specifically as follows: Collect the amplitude value of each line position when simulating the high-voltage line dancing under different preset ice thicknesses, and convert the amplitude value of each line position into a first relative parameter, which is the ratio of the amplitude value of each line position to the amplitude value corresponding to the monitoring position; The amplitude fitting function corresponding to the preset ice thickness is obtained by fitting the line position as the horizontal coordinate and the first relative parameter corresponding to the amplitude value of the line position as the vertical coordinate; And / or, the construction process of the wavelength fitting function is specifically as follows: The wavelength of each changing vibration wave when the simulated high-voltage line dances under different preset ice thicknesses is collected, and the wavelength of each changing vibration wave is converted into a second relative parameter, which is the ratio of the wavelength of each changing vibration wave to the wavelength of the changing vibration wave corresponding to the monitoring position; The wavelength fitting function corresponding to the preset ice thickness is obtained by fitting with the serial number of the changing vibration wave as the horizontal coordinate and the second relative parameter corresponding to the wavelength of the changing vibration wave as the vertical coordinate.

3. A method for monitoring and analyzing ice dancing of high-voltage lines according to claim 2, characterized in that: The expression of the amplitude fitting function is specifically: ； in, Indicates that the high voltage line is horizontal Upper line position The amplitude variation coefficient at ; Indicates that the preset ice thickness of the high-voltage line is When in horizontal The amplitude fitting function constructed by the above simulation; And / or, the expression of the wavelength fitting function is specifically: ； in, Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates that the preset ice thickness of the high-voltage line is When in horizontal The wavelength fitting function constructed by the simulation above.

4. The method for monitoring and analyzing ice dancing of high-voltage lines according to claim 1 is characterized in that: The specific solution process of the estimated vibration signal at the lowest point of the sag is as follows: The horizontal length of the line between the monitoring position and the lowest point of the sag is input into the amplitude fitting function to calculate the amplitude variation coefficient of the lowest point of the sag; The estimated amplitude of the estimated vibration signal is calculated by the product of the actual amplitude in the actual vibration signal and the amplitude variation coefficient; The wavelength of the changing vibration wave corresponding to the lowest point of the sag is obtained based on the wavelength fitting function, the actual wavelength at the monitoring position, and the horizontal length of the line between the monitoring position and the lowest point of the sag; The phase difference is determined by the position of the lowest point of the sag in the corresponding changing vibration wave, and the estimated phase of the estimated vibration signal is calculated in combination with the initial phase in the actual vibration signal; Keeping the vibration frequency unchanged, the estimated vibration signal of the lowest point of the sag is constructed by combining the estimated amplitude and the estimated phase.

5. A method for monitoring and analyzing ice dancing of high-voltage lines according to claim 4, characterized in that: The estimated vibration signal solution expression at the lowest point of the sag is: ； in, Indicates the actual wavelength at the monitoring location; Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates the horizontal length of the line between the monitoring position and the lowest point of the sag; Indicates that the high voltage line is horizontal The phase difference on Indicates the changing vibration wave number of the lowest point of sag on the high-voltage line; Indicates that the high voltage line is horizontal Previous The wavelength variation coefficient of the changing vibration wave; Indicates the actual vibration signal at the monitoring location; Represents the actual amplitude in the actual vibration signal; represents the angular frequency; Indicates time; represents the initial phase; Indicates that the lowest point of the sag is in the horizontal direction. Vibration signal on Indicates that the high voltage line is horizontal Amplitude variation coefficient of the lowest point of the upper sag; The estimated vibration signal indicating the lowest point of sag; Indicates that the lowest point of the sag is horizontal Vibration signal on Indicates that the lowest point of the sag is vertical The vibration signal on.

6. The method for monitoring and analyzing ice dancing of high-voltage lines according to claim 1 is characterized in that: The displacement direction determination process of the vibration displacement section is specifically as follows: The displacement signal is obtained by projecting the estimated vibration signal onto the transverse plane, where the transverse plane is a reference plane constructed by the vertical and transverse directions; The peak points and trough points in the displacement signal are screened out, and the displacement segment between adjacent peak points and trough points is used as the vibration displacement segment, and the direction from the endpoint in front in time to the endpoint in back in time in the vibration displacement segment is used as the displacement direction.

7. The method for monitoring and analyzing ice dancing of high-voltage lines according to claim 1 is characterized in that: The process of solving the estimated ice thickness at the lowest sag point corresponding to the minimum gravity error is specifically as follows: The preset ice thickness corresponding to the amplitude fitting function and the wavelength fitting function selected by solving the estimated vibration signal matches the corresponding preset gravity; The estimated gravity at the lowest point of the sag is obtained by keeping the direction of the combined force of the drag, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement section; The corresponding gravity error is calculated by the absolute value of the difference between the preset gravity and the estimated gravity, and the preset gravity corresponding to the minimum gravity error among all gravity errors is selected; The preset ice thickness corresponding to the selected preset gravity is used as the estimated ice thickness at the lowest point of the sag.

8. A high-voltage line ice dancing monitoring and analysis system, characterized in that: The system is used to implement a high-voltage line ice dancing monitoring and analysis method as described in any one of claims 1 to 7, comprising: A simulation analysis module is used to simulate and construct an amplitude fitting function to characterize the amplitude change caused by vibration transmission of a high-voltage line in an ice-covered dancing state, as well as a wavelength fitting function to characterize the wavelength change caused by the vibration transmission; A data acquisition module is used to collect the actual vibration signal of the monitoring position in the high-voltage line and the wind speed and direction data at the lowest point of the sag. The actual vibration signal includes a vertical vibration signal, a lateral vibration signal and a horizontal vibration signal; The vibration tracing module is used to combine the actual vibration signal, the horizontal length of the line between the monitoring position and the lowest point of the sag, the amplitude fitting function and the wavelength fitting function to obtain the estimated vibration signal of the lowest point of the sag; A vibration segmentation module is used to divide the displacement direction of the lowest point of the sag in each vibration displacement segment from the estimated vibration signal; The aerodynamic analysis module is used to determine the wind attack angle and wind speed value according to the wind speed and direction data, and determine the drag and lift at the lowest point of the sag according to the wind attack angle and wind speed value; The ice estimation module is used to solve the estimated ice thickness at the lowest point of the sag corresponding to the minimum gravity error, with the goal of keeping the direction of the combined force of resistance, lift and gravity at the lowest point of the sag consistent with the displacement direction of the corresponding vibration displacement segment.

9. A computer terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, a high-voltage line ice dancing monitoring and analysis method as described in any one of claims 1-7 is implemented.

10. A computer readable medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement a high-voltage line ice dancing monitoring and analysis method as described in any one of claims 1 to 7.

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