Method and device for drawing a distribution map of the amount of aeolian vibration of a power transmission line

Abstract

The application relates to the technical field of line operation and maintenance, and discloses a method and device for drawing a micro-wind vibration quantity ratio distribution diagram of a power transmission line, which comprises the following steps: obtaining historical wind environment data of multiple meteorological points in a target area, and calculating the joint probability density distribution of wind speed and wind direction of each meteorological point based on the historical wind environment data; traversing multiple preset line directions, and respectively calculating the micro-wind vibration quantity ratio of each meteorological point under each line direction; and drawing a micro-wind vibration quantity ratio distribution diagram in the target area based on the micro-wind vibration quantity ratio of each meteorological point. The application classifies line directions, and carries out differential micro-wind vibration quantity ratio evaluation on different line directions, so that quantitative evaluation and spatial distribution visualization of the micro-wind vibration action intensity of different regions and different line directions are realized.

Description

Technical Field

[0001] This invention relates to the field of power line operation and maintenance technology, specifically to a method and apparatus for drawing a distribution map of the micro-wind vibration ratio of power transmission lines. Background Technology

[0002] Existing designs for vibration damping of transmission lines are mostly based on line structural parameters and macroscopic wind zone divisions, lacking detailed consideration of the local wind environment characteristics along the line and failing to reflect the spatial differences in the intensity of wind vibration in different regions and along different routes.

[0003] Therefore, in actual engineering projects, it is difficult to identify areas with strong aerobatic vibration and sensitive line routes. Vibration prevention measures are usually configured uniformly across the entire line, which is insufficient in terms of specificity and cost-effectiveness. During the operation and maintenance phase, conductor strand breakage and fatigue damage mainly rely on manual inspection. Due to the lack of regional aerobatic vibration intensity distribution maps, inspection work often adopts a large-scale, indiscriminate inspection approach, which is inefficient and makes it difficult to achieve key control. Summary of the Invention

[0004] This invention provides a method and apparatus for drawing a distribution map of the magnitude of wind vibration in transmission lines, in order to solve the problem that existing technologies cannot quantitatively reflect the spatial distribution of the intensity of wind vibration in different regions and along different routes.

[0005] In a first aspect, the present invention provides a method for drawing a distribution map of the wind-induced vibration ratio of a transmission line, the method comprising: Historical wind environment data of multiple meteorological points within the target area are obtained, and the joint probability density distribution of wind speed and wind direction of each meteorological point is calculated based on the historical wind environment data. Traverse multiple preset route directions and calculate the ratio of light wind vibration at each meteorological point under each route direction; Based on the ratio of wind vibration at each meteorological point, a distribution map of the wind vibration ratio within the target area is drawn.

[0006] This invention provides a method for drawing a distribution map of the micro-wind vibration ratio of transmission lines. By introducing a joint probability density distribution of wind speed and direction, the method quantifies the regional wind environment characteristics and calculates the micro-wind vibration ratio for various preset line orientations. Finally, it draws a distribution map of the micro-wind vibration ratio in the target area, classifies the line orientations, and conducts differentiated evaluation of the micro-wind vibration ratio for lines with different orientations. This enables a quantitative evaluation and spatial distribution visualization of the intensity of micro-wind vibration in different regions and for lines with different orientations, solving the problem that existing technologies cannot quantitatively reflect the spatial distribution of the intensity of micro-wind vibration in different regions and for lines with different orientations.

[0007] In one alternative implementation, historical wind environment data includes historical wind speed and historical wind direction; Based on historical wind environment data, the joint probability density distribution of wind speed and wind direction at each meteorological point is calculated, including: Based on historical wind speeds, the kernel density estimation method is used to calculate the wind speed probability density distribution. Historical wind speeds are divided into intervals, historical wind directions within each interval are selected, and the probability density distribution of wind direction within each interval is calculated using the kernel density estimation method. Based on the probability density distributions of wind speed and wind direction, the joint probability density distribution of wind speed and wind direction is calculated.

[0008] In the above technical solution, the probability density distribution of wind speed and the probability density distribution of wind direction are calculated separately by using the kernel density estimation method, and then a joint probability density distribution of wind speed and wind direction is constructed. This can more accurately reflect the probability of different combinations of wind speed and wind direction in the actual wind environment, provide basic data that is more in line with the characteristics of the real wind field for the subsequent quantitative calculation of the micro-vibration ratio, and establish a method for determining the degree of micro-vibration of transmission lines that considers the wind environment characteristics of the transmission line area.

[0009] In one optional implementation, multiple preset route orientations are traversed, and the ratio of light wind vibration at each meteorological point under each route orientation is calculated, including: Based on the conductor type of the transmission line, the wind speed characteristic range of the micro-vibration is determined; By iterating through each preset route, based on the joint probability density distribution of wind speed and direction at meteorological points, wind speed and direction combinations that satisfy preset conditions and whose wind speed is within the wind speed characteristic range are selected. By summing the combined probability density values ​​of wind speed and wind direction, the ratio of micro-vibration under each route direction is obtained.

[0010] In the above technical solution, by determining the wind speed characteristic range for different conductor types and traversing multiple preset line directions, the wind speed and wind direction combinations that meet the preset conditions and whose wind speed is within the characteristic range are selected. The combined probability density values ​​are accumulated to calculate the micro-vibration ratio, thereby realizing the differentiated quantitative evaluation of the intensity of micro-vibration under different conductor types and different line directions.

[0011] In one alternative implementation, the preset route is set in the following manner: Using the north-south orientation as the baseline degree, the degree increments are set within the range of 0° to 180° at preset degree intervals.

[0012] In the above technical solution, by using the north-south orientation as a reference and setting multiple line orientations in increments of 0° to 180° with preset degree intervals, the system can cover all possible transmission line directions, providing a complete evaluation dimension for subsequent calculation of the micro-wind vibration ratio of different orientation lines.

[0013] In one optional implementation, wind speed and direction combinations that satisfy preset conditions for the angle between the wind direction and the transmission line alignment, and whose wind speed is within the wind speed characteristic range, are selected, including: Calculate the angle between the wind direction and the direction of the transmission line; Determine whether the included angle is less than or equal to the first preset threshold or greater than or equal to the second preset threshold. If so, determine that the wind direction meets the preset conditions. Determine whether the wind speed falls within the wind speed characteristic range. If so, determine that the wind speed meets the wind speed characteristic range condition. The wind speed and wind direction that simultaneously meet the preset wind direction conditions and the wind speed characteristic range conditions are combined to determine the selected wind speed and wind direction combinations.

[0014] In the above technical solution, the angle between the wind direction and the route is calculated, and it is determined whether the angle is less than or equal to a first preset threshold or greater than or equal to a second preset threshold. At the same time, it is determined whether the wind speed falls within the wind speed characteristic range. Only when the wind direction condition and the wind speed condition are met at the same time, the corresponding wind speed and wind direction combination is selected, thereby achieving accurate screening of wind environment conditions that effectively induce micro-wind vibration.

[0015] In one alternative implementation, the formula for calculating the wind vibration ratio is as follows:

[0016] in, The ratio of aerodynamic vibrations under each route orientation; This represents the total number of wind speed ranges. This represents the total number of wind direction zones. This is the wind direction statistical coefficient. For wind speed statistics, This represents the joint probability density value of wind speed and wind direction. The sequence number of the wind speed range, This refers to the sequence number of the wind direction zone.

[0017] In one optional implementation, a distribution map of the wind vibration ratio within the target area is drawn based on the wind vibration ratio at each meteorological point, including: Based on the wind vibration ratio at each meteorological point, a wind vibration ratio distribution map of the entire route is drawn, as well as a wind vibration ratio distribution map of each preset route.

[0018] In the above technical solution, by drawing the distribution map of the ratio of micro-wind vibration along the entire route and the distribution map of the ratio of micro-wind vibration under each preset route, the spatial distribution of the intensity of micro-wind vibration is presented from the two levels of overall comprehensive risk and differentiated risk by route, providing a visual basis for comprehensively identifying the risk distribution characteristics of different route routes.

[0019] In one optional implementation, plotting the distribution of aerodynamic vibration ratios along the entire route includes: The ratio of light wind vibration at each meteorological point under all preset route directions is summed to obtain the comprehensive ratio of the entire route direction for each meteorological point. Based on the comprehensive ratio of the entire route along the meteorological line at each meteorological point, a distribution map of the ratio of aerodynamic vibrations along the entire route was drawn using spatial interpolation.

[0020] In the above technical solution, the ratio of aerodynamic vibration at each meteorological point under all preset route directions is accumulated to obtain the comprehensive ratio of the entire route direction. Then, a distribution map is drawn using spatial interpolation, thereby realizing a comprehensive assessment of the overall intensity of aerodynamic vibration in the target area and a visual representation of its continuous spatial distribution.

[0021] In one optional implementation, plotting the distribution of aerodynamic vibration ratios along each preset route includes: Based on the wind vibration ratio at each meteorological point under each preset route, spatial interpolation was used to draw the wind vibration ratio distribution map under each route, resulting in multiple wind vibration ratio distribution maps.

[0022] In the above technical solution, by using spatial interpolation to draw distribution maps of the micro-wind vibration ratio at each meteorological point under each preset route, multiple distribution maps of the micro-wind vibration ratio corresponding to different route routes are generated, thereby realizing the independent presentation and visualization of the spatial distribution of the micro-wind vibration intensity for each route.

[0023] In a second aspect, the present invention provides a device for plotting the distribution map of wind-induced vibration ratio of transmission lines, the device comprising: The joint probability density distribution calculation module is used to acquire historical wind environment data of multiple meteorological points within the target area, and calculate the joint probability density distribution of wind speed and wind direction of each meteorological point based on the historical wind environment data. The micro-vibration ratio calculation module is used to traverse multiple preset route directions and calculate the micro-vibration ratio of each meteorological point under each route direction. The distribution map drawing module is used to draw a distribution map of the wind vibration ratio within a target area based on the wind vibration ratio of each meteorological point.

[0024] Thirdly, the present invention provides an electronic device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the method for drawing the distribution map of wind vibration of transmission lines as described in the first aspect or any corresponding embodiment.

[0025] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the method for drawing a distribution map of wind-induced vibration of a transmission line according to the first aspect or any corresponding embodiment described above.

[0026] Fifthly, the present invention provides a computer program product, including computer instructions, which are used to cause a computer to execute the method for drawing a distribution map of wind-induced vibration of a transmission line according to the first aspect or any corresponding embodiment described above. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the first process for drawing a distribution map of the aerodynamic vibration of a transmission line according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the second process for drawing a distribution map of the aerodynamic vibration of a transmission line according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a target area according to an embodiment of the present invention; Figure 4 This is a schematic diagram of meteorological data monitoring points (hereinafter referred to as meteorological points) in a target area according to an embodiment of the present invention; Figure 5 This is a distribution diagram of the aerodynamic vibration ratio along the entire route according to an embodiment of the present invention; Figure 6(a) is a distribution diagram of the wind vibration ratio of the first preset routing according to an embodiment of the present invention; Figure 6(b) is a distribution diagram of the wind vibration ratio of the second preset routing according to an embodiment of the present invention; Figure 6(c) is a distribution diagram of the wind vibration ratio of the third preset routing according to an embodiment of the present invention; Figure 6(d) is a distribution diagram of the wind vibration ratio of the fourth preset routing according to an embodiment of the present invention; Figure 6(e) is a distribution diagram of the wind vibration ratio of the fifth preset routing according to an embodiment of the present invention; Figure 6(f) is a distribution diagram of the wind vibration ratio of the sixth preset routing according to an embodiment of the present invention; Figure 6(g) is a distribution diagram of the wind vibration ratio of the seventh preset routing according to an embodiment of the present invention; Figure 6(h) is a distribution diagram of the wind vibration ratio of the eighth preset route according to an embodiment of the present invention; Figure 7 This is a structural block diagram of a device for drawing a distribution map of the wind vibration of a transmission line according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0029] 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.

[0030] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] According to an embodiment of the present invention, a method for drawing a distribution map of the wind vibration ratio of a transmission line is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0033] This embodiment provides a method for drawing a distribution map of wind-induced vibration ratio in transmission lines, which can be used in the aforementioned electronic equipment. Figure 1 This is a flowchart of a method for drawing a distribution map of the aerodynamic vibration ratio of a transmission line according to an embodiment of the present invention, as shown below. Figure 1 As shown, the process includes the following steps: Step S101: Obtain historical wind environment data of multiple meteorological points within the target area, and calculate the joint probability density distribution of wind speed and wind direction for each meteorological point based on the historical wind environment data.

[0034] The target area refers to the geographical region where the transmission line is located, for which a micro-wind vibration ratio distribution map needs to be drawn. Multiple meteorological stations are distributed within this area, and drawing the distribution map can reflect the differences in the intensity of micro-wind vibration at different locations within the region.

[0035] The specific geographical locations within the target area where meteorological monitoring equipment is installed are called meteorological monitoring data points (or simply meteorological points). Each meteorological point can provide historical wind speed and historical wind direction data for that location, serving as the basic input for subsequent calculations.

[0036] Historical wind environment data refers to wind speed and wind direction data recorded by meteorological stations over a past period. Specifically, it includes historical wind speed and historical wind direction, used for statistical analysis of the probability distribution of wind speed, probability distribution of wind direction, and the joint probability distribution of the two at that location.

[0037] The joint probability density distribution of wind speed and wind direction is used to describe the probability distribution of different wind speeds and different wind directions occurring simultaneously at a certain meteorological point.

[0038] For example, wind speed can be divided into several intervals (such as 0-0.5 m / s, 0.5-1 m / s, etc.), and wind direction can be divided into several intervals (such as 0°-10°, 10°-20°, etc.). Each combination of wind speed interval and wind direction interval corresponds to a probability value, which represents the relative frequency of the combination in historical wind environment data.

[0039] Specifically, historical wind speed and direction data from multiple meteorological points within the target area are obtained, and the joint occurrence frequency of wind speed and direction is independently calculated for each meteorological point to construct a joint probability density distribution of wind speed and direction that reflects the wind environment characteristics of that location.

[0040] Step S102: Traverse multiple preset route directions and calculate the ratio of light wind vibration at each meteorological point under each route direction.

[0041] The preset route alignment is a pre-defined route direction used to assess the sensitivity of transmission lines in different directions to aerodynamic vibrations. This can also be understood as the transmission lines running in different directions (north-south, east-west, diagonally, etc.). The preset route alignment involves pre-setting a set of route angles covering all possible directions, calculating the aerodynamic vibration ratio for each direction, and thus identifying which direction of the line is most prone to aerodynamic vibrations in the windy environment of that region.

[0042] The micro-vibration ratio is used to quantify the relative intensity of micro-vibration experienced by a transmission line at a specific meteorological point and under a predetermined line orientation. It can be understood as the sum of the probabilities of all effective wind conditions (suitable wind speed and wind direction that can cause vibration) occurring at a certain location for a certain line orientation.

[0043] Specifically, for each meteorological point, its joint probability density distribution of wind speed and direction is substituted into the vibration calculation model of each preset route. By accumulating the joint probability density values ​​corresponding to the effective wind direction and effective wind speed intervals, the ratio of light wind vibration at that meteorological point under each route is calculated.

[0044] Step S103: Based on the wind vibration ratio of each meteorological point, draw a distribution map of the wind vibration ratio in the target area.

[0045] Among them, the wind vibration ratio distribution map refers to a graphic reflecting the spatial distribution of wind vibration intensity based on the wind vibration ratio of each meteorological point in the target area, drawn by spatial interpolation method.

[0046] Specifically, it includes two categories: Distribution map of aerodynamic vibration ratio along the entire route: The distribution map is drawn by summing the aerodynamic vibration ratios of each meteorological point under the entire preset route, reflecting the overall intensity distribution of aerodynamic vibration in the region.

[0047] Distribution of wind vibration ratio for each preset route: For each preset route, the distribution of wind vibration ratio at each meteorological point under that route is plotted to reflect the spatial distribution of wind vibration intensity for different routes.

[0048] The method for drawing the micro-wind vibration ratio distribution map of transmission lines provided in this embodiment quantifies the regional wind environment characteristics by introducing the joint probability density distribution of wind speed and wind direction, and calculates the micro-wind vibration ratio for various preset line directions. Finally, it draws the micro-wind vibration ratio distribution map of the target area, classifies the line directions, and conducts differentiated micro-wind vibration ratio evaluation for lines with different directions. This enables the quantitative evaluation and spatial distribution visualization of the intensity of micro-wind vibration in different regions and lines with different directions, solving the problem that existing technologies cannot quantitatively reflect the spatial distribution of the intensity of micro-wind vibration in different regions and lines with different directions.

[0049] This embodiment provides a method for drawing a distribution map of wind-induced vibration ratio in transmission lines, which can be used in the aforementioned electronic equipment. Figure 2 This is a flowchart of a method for drawing a distribution map of the aerodynamic vibration ratio of a transmission line according to an embodiment of the present invention, as shown below. Figure 2 As shown, the process includes the following steps: Step S201: Obtain historical wind environment data of multiple meteorological points within the target area, and calculate the joint probability density distribution of wind speed and wind direction for each meteorological point based on the historical wind environment data.

[0050] Specifically, historical wind environment data includes historical wind speed and historical wind direction; based on the historical wind speed and historical wind direction data, and meteorological points, the probability density distribution of wind speed and wind direction at each meteorological point is calculated. Step S201 includes: Step S2011: Based on historical wind speeds, calculate the wind speed probability density distribution using the kernel density estimation method.

[0051] Specifically, a probability density distribution analysis of historical wind speed data is conducted. The kernel density distribution method is used to calculate the wind speed probability density distribution, as shown in the following expression: (1); in, Indicates wind speed as Wind speed probability density distribution at time, This represents the total number of historical wind speed samples. For kernel function, , For historical wind speed, Historical wind speed threshold The historical wind speed sample is segmented by interval. It is the ratio of the difference between the wind speed value and a certain historical wind speed sample to the interval between segments of the historical wind speed sample.

[0052] Step S2012: Divide the historical wind speed into intervals, filter the historical wind direction within each wind speed interval, and use the kernel density estimation method to calculate the wind direction probability density distribution within each wind speed interval.

[0053] Specifically, a joint probability density analysis of historical wind speed and direction was conducted. First, wind speeds were divided into magnitudes, with 0.5 m / s as the dividing line, ranging from 0.5 to 15 m / s. Wind speeds greater than 15 m / s were statistically analyzed as 15 m / s. Wind direction data within each wind speed range were then selected, and the probability density distribution of wind direction under specific wind speed conditions was calculated using kernel density analysis. The calculation formula is as follows: (2); in, For the wind direction within the corresponding wind speed range Wind direction probability density distribution at time, This represents the total number of wind direction samples within the corresponding wind speed range. The wind direction sample is segmented at intervals of 10°, with a range of 0-350°. This is the historical wind direction threshold.

[0054] Step S2013: Calculate the joint probability density distribution of wind speed and wind direction based on the probability density distribution of wind speed and wind direction.

[0055] Specifically, the joint probability density distribution function of wind speed and wind direction is calculated using the following formula: (3); in, This represents the joint probability density distribution of wind speed and wind direction.

[0056] The calculated joint probability distribution of wind speed and wind direction is shown in Table 1 below: Table 1 Joint Probability Density Distribution

[0057] Step S202: Traverse multiple preset route directions and calculate the ratio of light wind vibration at each meteorological point under each route direction.

[0058] Specifically, the preset route is set in the following way: Using the north-south orientation as the baseline degree, the degree increments are set within the range of 0° to 180° at preset degree intervals.

[0059] For example, taking a north-south route as the baseline (i.e., 0°), each rotation of 22.5° represents one route direction, resulting in a total of 8 possible route directions, as shown in Table 2 below: Table 2 Route Direction Table

[0060] In Table 2, to It indicates 8 preset route directions.

[0061] Step S202 above includes: Step S2021: Determine the wind speed characteristic range of the micro-vibration based on the conductor type of the transmission line.

[0062] Specifically, based on the existing theory of aerodynamic vibration calculation for conductors of different transmission line types, the wind speed characteristic range of aerodynamic vibration for specific conductor types is obtained. .

[0063] Step S2022: Traverse each preset route and, based on the joint probability density distribution of wind speed and direction at meteorological points, select wind speed and direction combinations that satisfy preset conditions and whose wind speed is within the wind speed characteristic range.

[0064] In some optional implementations, step S2022 above includes: Step a: Calculate the angle between the wind direction and the transmission line direction; determine whether the angle is less than or equal to the first preset threshold or greater than or equal to the second preset threshold. If so, the wind direction is determined to meet the preset conditions; determine whether the wind speed falls within the wind speed characteristic range. If so, the wind speed is determined to meet the wind speed characteristic range conditions; combine the wind speeds and wind directions that simultaneously meet the wind direction preset conditions and the wind speed characteristic range conditions to determine the selected wind speed and wind direction combinations.

[0065] Specifically, for each wind speed and direction combination, the angle between the wind direction and the route is first calculated. If the angle is less than or equal to a first preset threshold or greater than or equal to a second preset threshold, the wind direction is considered to meet the directional condition for inducing micro-vibration. Simultaneously, it is determined whether the wind speed of this combination falls within a pre-determined micro-vibration wind speed characteristic range. If it does, the wind speed is considered to meet the intensity condition. When both the wind direction and wind speed conditions are met, the wind speed and direction combination is selected as a valid combination. The first preset threshold is 45°, and the second preset threshold is 135°.

[0066] Step S2023: Accumulate the joint probability density values ​​of wind speed and wind direction combinations to obtain the micro-vibration ratio under each route direction.

[0067] The formula for calculating the wind vibration ratio is as follows: (4); in, The ratio of aerodynamic vibrations under each route orientation; This represents the total number of wind speed ranges. This represents the total number of wind direction zones. This is the wind direction statistical coefficient. For wind speed statistics, This represents the joint probability density value of wind speed and wind direction. The sequence number of the wind speed range, This refers to the sequence number of the wind direction zone.

[0068] Wind direction statistical coefficient Calculated using the following formula: (5); Angle between wind direction and transmission line Calculated using the following formula: (6); in, For the route direction angle, values ​​can be taken from Table 2 above. To correct for wind direction, use the following formula: (7); Wind speed statistical coefficient Calculated using the following formula: (8); in, , This represents the converted wind speed in the direction perpendicular to the conductor of the transmission line.

[0069] For each of the eight preset route directions, the relative proportion of aerobatic vibration was calculated. , The values ​​are 1,...,8.

[0070] Step S203: Based on the wind vibration ratio of each meteorological point, draw a distribution map of the wind vibration ratio in the target area.

[0071] Specifically, step S203 includes: Step S2031: Based on the wind vibration ratio of each meteorological point, draw a distribution map of the wind vibration ratio along the entire route.

[0072] In an optional implementation, step S2031 includes: Step b: Sum the ratios of light wind vibration at each meteorological point under all preset route directions to obtain the comprehensive ratio of light wind vibration at each meteorological point under the entire route direction; based on the comprehensive ratio of light wind vibration at each meteorological point under the entire route direction, use spatial interpolation to draw a distribution map of the distribution of light wind vibration ratio under the entire route direction.

[0073] Specifically, consider the distribution map of the aeolian vibration ratio along the entire route. The aeolian vibration ratios of the eight routes at each meteorological station are summed, i.e. Then, based on the coordinates of the meteorological points, the Kriging interpolation method is used to obtain the distribution map of the wind vibration ratio along the entire route of the target area.

[0074] Step S2032: Based on the wind vibration ratio of each meteorological point, draw a distribution map of the wind vibration ratio under each preset route.

[0075] In an optional implementation, step S2032 includes: Step c: Based on the wind vibration ratio of each meteorological point under each preset route, spatial interpolation method is used to draw the wind vibration ratio distribution map under each route, resulting in multiple wind vibration ratio distribution maps.

[0076] Specifically, a distribution map of the aerodynamic vibration ratio for each route was established. Based on the coordinates of meteorological points, the Kriging interpolation method was used to calculate the distribution map of the aerodynamic vibration ratio for each route in the entire target area, resulting in a total of 8 distribution maps.

[0077] Ultimately, based on the distribution map of aerodynamic vibration, corresponding aerodynamic vibration prevention design measures can be formulated for high-risk aerodynamic vibration areas. At the same time, operation and maintenance strategies for inspecting strand breakage caused by wind vibration of transmission line conductors can also be further developed.

[0078] The method for drawing the distribution map of micro-wind vibration of transmission lines provided in this embodiment firstly clarifies the wind environment characteristics of the target area, mainly including the distribution characteristics of wind speed and wind direction. Then, it analyzes the probability of micro-wind vibration occurring at each location of the conductor in the entire target area under different wind direction conditions, and clarifies the probability ratio of occurrence at different locations. Finally, it formulates a graded distribution map of the area based on the degree of micro-wind vibration under the overall wind direction, so as to realize the quantitative assessment and spatial distribution visualization of the intensity of micro-wind vibration of lines in different areas and different directions. This solves the problem that the existing technology cannot quantitatively reflect the spatial distribution of the intensity of micro-wind vibration of lines in different areas and different directions.

[0079] Taking a specific target area as an example, such as Figure 3 As shown, a risk classification map of micro-wind vibration of transmission lines in the region was drawn.

[0080] like Figure 4 As shown, meteorological data monitoring points (i.e., meteorological points) within the target area are first collected. Then, for each meteorological point, the probability density distribution of wind speed and wind direction is calculated using formulas (1) to (3), as shown in Table 3 below: Table 3 Joint probability distribution of a certain meteorological point

[0081] Next, using formulas (4) to (8), the relative ratio of light vibrations occurring under different line orientations was calculated for each meteorological point: Taking a north-south route as an example, the route direction The value is 0°. Calculate according to formula (6):

[0082] when When the wind direction is between 0-45° and 135-180°, the angle between the wind direction and the transmission line is less than 45°, and the wind direction statistical coefficient is... The value is 1; calculate according to formula (7):

[0083] For 0°-45° and 135°-180°, the corresponding wind direction The wind direction ranges are 0°-45°, 135°-180°, 180°-225°, and 315°-360°.

[0084] For wind direction screening, the conditions for micro-vibration are calculated according to formula (8). For the micro-vibration risk zone within this scope, mainly targeting 500kV and above transmission lines, the micro-vibration wind speed threshold is... and The wind speeds were set to 2 m / s and 8 m / s respectively, and the ratio of the wind vibration along the route was calculated to be 0.2123.

[0085] Based on this method, the ratio of light wind vibrations at this meteorological point under eight different line orientations was calculated, as shown in Table 4 below: Table 4 Calculation of Light Wind Vibration Ratio

[0086] Finally, the information on the ratio of light wind vibration of power transmission lines at all meteorological points in the entire region is calculated.

[0087] Finally, a distribution map of the wind vibration ratio in the target area was drawn: 1) First type of distribution map: A distribution map considering the ratio of aerodynamic vibration along the entire route, such as... Figure 5 As shown.

[0088] 2) Second type of distribution map: Establish the distribution map of the aerodynamic vibration ratio for each route direction, as shown in Figures 6(a), 6(b), 6(c), 6(d), 6(e), 6(f), 6(g), and 6(h). Figure 6(a) is the aerodynamic vibration ratio distribution map under the (south-north, 0°) route direction; Figure 6(b) is the aerodynamic vibration ratio distribution map under the (southwest-northeast, 22.5°, 22.5°) route direction; Figure 6(c) is the aerodynamic vibration ratio distribution map under the (southwest-northeast, 45°) route direction; Figure 6(d) is the aerodynamic vibration ratio distribution map under the (west-northeast, 45°) route direction; Figure 6(d) is the aerodynamic vibration ratio distribution map under the (south-northeast, 45°) route direction; Figure 6(h ... Figure 6(e) shows the distribution of the wind vibration ratio under the line direction of (22.5° south - 22.5° east of north, 67.5°), Figure 6(f) shows the distribution of the wind vibration ratio under the line direction of (22.5° west of north - 22.5° east of south, 112.5°), Figure 6(g) shows the distribution of the wind vibration ratio under the line direction of (northwest - southeast, 135°), and Figure 6(h) shows the distribution of the wind vibration ratio under the line direction of (22.5° north of west - 22.5° south of east, 157.5°).

[0089] The method for drawing the distribution map of wind-induced vibration ratio of transmission lines provided in this embodiment establishes a method for determining the degree of wind-induced vibration of transmission lines that considers the wind environment characteristics of the transmission line area. It classifies the line orientation and performs differentiated wind-induced vibration ratio assessments for lines with different orientations. It provides a distribution map of the wind-induced vibration ratio of transmission lines throughout the entire area, quantifies the degree of wind-induced vibration, and supports the identification of dangerous locations and line orientations within the area.

[0090] This embodiment also provides a device for plotting the distribution map of wind vibration ratio of transmission lines. This device is used to implement the above embodiments and preferred embodiments, and will not be repeated for details already described. As used below, the term "module" can be a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0091] This embodiment provides a device for drawing a distribution map of the wind vibration ratio of a power transmission line, such as... Figure 7 As shown, it includes: The joint probability density distribution calculation module 701 is used to acquire historical wind environment data of multiple meteorological points within the target area, and calculate the joint probability density distribution of wind speed and wind direction of each meteorological point based on the historical wind environment data.

[0092] The light wind vibration ratio calculation module 702 is used to traverse multiple preset route directions and calculate the light wind vibration ratio of each meteorological point under each route direction.

[0093] The distribution map drawing module 703 is used to draw a distribution map of the wind vibration ratio within the target area based on the wind vibration ratio of each meteorological point.

[0094] In some optional implementations, historical wind environment data includes historical wind speed and historical wind direction; the joint probability density distribution calculation module 701 includes: The wind speed probability density distribution calculation unit is used to calculate the wind speed probability density distribution based on historical wind speeds using the kernel density estimation method. The wind direction probability density distribution calculation unit is used to divide the historical wind speed into intervals, filter the historical wind direction in each wind speed interval, and use the kernel density estimation method to calculate the wind direction probability density distribution in each wind speed interval. The joint probability density distribution calculation unit is used to calculate the joint probability density distribution of wind speed and wind direction based on the probability density distribution of wind speed and the probability density distribution of wind direction.

[0095] In some alternative implementations, the aerodynamic vibration ratio calculation module 702 includes: The characteristic interval determination unit is used to determine the wind speed characteristic interval of aerodynamic vibration based on the conductor type of the transmission line.

[0096] The wind speed and direction combination unit is used to traverse each preset line direction and, based on the joint probability density distribution of wind speed and direction at meteorological points, select wind speed and direction combinations that satisfy preset conditions for the angle between the wind direction and the transmission line direction and that the wind speed is within the wind speed characteristic range.

[0097] The micro-vibration ratio calculation unit is used to accumulate the joint probability density values ​​of wind speed and wind direction combinations to obtain the micro-vibration ratio under each route orientation.

[0098] In one alternative implementation, the preset route is set in the following manner: Using the north-south orientation as the baseline degree, the degree increments are set within the range of 0° to 180° at preset degree intervals.

[0099] In one optional implementation, the wind speed and direction combination unit includes: The wind speed and direction combination screening subunit is used to calculate the angle between the wind direction and the transmission line direction; determine whether the angle is less than or equal to a first preset threshold or greater than or equal to a second preset threshold. If so, the wind direction is determined to meet the preset conditions; determine whether the wind speed falls within the wind speed characteristic range. If so, the wind speed is determined to meet the wind speed characteristic range conditions; combine the wind speeds and directions that simultaneously meet the wind direction preset conditions and the wind speed characteristic range conditions to determine the screened wind speed and direction combinations.

[0100] In one alternative implementation, the formula for calculating the wind vibration ratio is as follows:

[0101] in, The ratio of aerodynamic vibrations under each route orientation; This represents the total number of wind speed ranges. This represents the total number of wind direction zones. This is the wind direction statistical coefficient. For wind speed statistics, This represents the joint probability density value of wind speed and wind direction. The sequence number of the wind speed range, This refers to the sequence number of the wind direction zone.

[0102] In one optional implementation, the distribution map drawing module 703 includes: The first type of distribution map drawing unit is used to draw a distribution map of the wind vibration ratio along the entire route based on the wind vibration ratio of each meteorological point. The second type of distribution map drawing unit is used to draw the distribution map of the wind vibration ratio under each preset route based on the wind vibration ratio of each meteorological point.

[0103] In one optional implementation, the first type of distribution map drawing unit includes: The first interpolation subunit is used to accumulate the ratio of light wind vibration at each meteorological point under all preset route directions to obtain the comprehensive ratio of light wind vibration at each meteorological point under all route directions; based on the comprehensive ratio of light wind vibration at each meteorological point under all route directions, a distribution map of light wind vibration ratio under all route directions is drawn using spatial interpolation.

[0104] In one optional implementation, the second type of distribution map drawing unit includes: The second interpolation subunit is used to draw a distribution map of the wind vibration ratio under each route based on the wind vibration ratio of each meteorological point under each preset route using spatial interpolation, resulting in multiple wind vibration ratio distribution maps.

[0105] The transmission line aerodynamic vibration ratio distribution map drawing device provided in this embodiment of the invention can execute the transmission line aerodynamic vibration ratio distribution map drawing method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method. Further functional descriptions of the above modules and units are the same as in the corresponding embodiments described above, and will not be repeated here.

[0106] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0107] The following is a detailed reference. Figure 8 The diagram illustrates a structural schematic suitable for implementing an electronic device according to embodiments of the present invention. The electronic device may include a processor (e.g., a central processing unit, a graphics processing unit, etc.) 801, which can perform various appropriate actions and processes according to a program stored in read-only memory (ROM) 802 or a program loaded from memory 808 into random access memory (RAM) 803. The RAM 803 also stores various programs and data required for the operation of the electronic device. The processor 801, ROM 802, and RAM 803 are interconnected via a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0108] Typically, the following devices can be connected to I / O interface 805: input devices 806 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 807 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; memory devices 808 including, for example, magnetic tapes, hard disks, etc.; and communication devices 809. Communication device 809 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 8 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown, and more or fewer devices may be implemented or have instead.

[0109] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device 809, or installed from a memory 808, or installed from a ROM 802. When the computer program is executed by the processor 801, it performs the functions defined in the method for drawing a distribution map of the wind-induced vibration ratio of transmission lines according to embodiments of the present invention.

[0110] Figure 8 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments of the present invention.

[0111] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that the computer, processor, microprocessor controller, or programmable hardware includes storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the method for drawing the distribution map of wind-induced vibration of transmission lines shown in the above embodiments is implemented.

[0112] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0113] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for drawing a distribution map of wind-induced vibration ratio in a transmission line, characterized in that, The method includes: Historical wind environment data of multiple meteorological points within the target area are obtained, and based on the historical wind environment data, the joint probability density distribution of wind speed and wind direction of each meteorological point is calculated. Traverse multiple preset route directions and calculate the ratio of light wind vibration at each meteorological point under each route direction; Based on the ratio of wind vibration at each meteorological point, a distribution map of the wind vibration ratio within the target area is drawn.

2. The method according to claim 1, characterized in that, The historical wind environment data includes historical wind speed and historical wind direction; The calculation of the joint probability density distribution of wind speed and direction at each meteorological point based on the historical wind environment data includes: Based on historical wind speeds, the kernel density estimation method is used to calculate the wind speed probability density distribution. Historical wind speeds are divided into intervals, historical wind directions within each interval are selected, and the probability density distribution of wind direction within each interval is calculated using the kernel density estimation method. Based on the wind speed probability density distribution and the wind direction probability density distribution, the joint probability density distribution of wind speed and wind direction is calculated.

3. The method according to claim 1, characterized in that, The process of traversing multiple preset route directions and calculating the ratio of light wind vibration at each meteorological point under each route direction includes: Based on the conductor type of the transmission line, the wind speed characteristic range of the micro-vibration is determined; By traversing each preset route, based on the joint probability density distribution of wind speed and direction at meteorological points, wind speed and direction combinations that satisfy preset conditions and whose wind speed is within the wind speed characteristic range are selected. By summing the combined probability density values ​​of the wind speed and wind direction combinations, the micro-vibration ratio under each route direction is obtained.

4. The method according to claim 3, characterized in that, The preset route is set in the following manner: Using the north-south orientation as the baseline degree, the degree increments are set within the range of 0° to 180° at preset degree intervals.

5. The method according to claim 3, characterized in that, The selection of wind speed and direction combinations that meet preset conditions for the angle between the wind direction and the transmission line direction, and whose wind speed is within the wind speed characteristic range, includes: Calculate the angle between the wind direction and the direction of the transmission line; Determine whether the included angle is less than or equal to a first preset threshold or greater than or equal to a second preset threshold. If so, determine that the wind direction meets the preset conditions. Determine whether the wind speed falls within the wind speed characteristic range. If so, determine that the wind speed meets the wind speed characteristic range condition. The wind speed and wind direction that simultaneously meet the preset wind direction conditions and the wind speed characteristic range conditions are combined to determine the selected wind speed and wind direction combinations.

6. The method according to claim 1 or 3, characterized in that, The formula for calculating the micro-wind vibration ratio is as follows: in, The ratio of aerodynamic vibrations under each route orientation; This represents the total number of wind speed ranges. This represents the total number of wind direction zones. This is the wind direction statistical coefficient. For wind speed statistics, This represents the joint probability density value of wind speed and wind direction. The sequence number of the wind speed range, This refers to the sequence number of the wind direction zone.

7. The method according to claim 1, characterized in that, The step of drawing a distribution map of the wind vibration ratio within the target area based on the wind vibration ratio at each meteorological point includes: Based on the wind vibration ratio at each meteorological point, a wind vibration ratio distribution map of the entire route is drawn, as well as a wind vibration ratio distribution map of each preset route.

8. The method according to claim 7, characterized in that, The process of drawing a distribution map of the aerodynamic vibration ratio along the entire route includes: The ratio of light wind vibration at each meteorological point under all preset route directions is summed to obtain the comprehensive ratio of the entire route direction for each meteorological point. Based on the comprehensive ratio of the entire route along the meteorological line at each meteorological point, a distribution map of the ratio of aerodynamic vibrations along the entire route was drawn using spatial interpolation.

9. The method according to claim 7, characterized in that, The step of drawing the distribution map of the aerodynamic vibration ratio under each preset route includes: Based on the wind vibration ratio at each meteorological point under each preset route, spatial interpolation was used to draw the wind vibration ratio distribution map under each route, resulting in multiple wind vibration ratio distribution maps.

10. A device for plotting the distribution map of wind-induced vibration ratio of transmission lines, characterized in that, The device includes: The joint probability density distribution calculation module is used to acquire historical wind environment data of multiple meteorological points within the target area, and calculate the joint probability density distribution of wind speed and wind direction of each meteorological point based on the historical wind environment data. The micro-vibration ratio calculation module is used to traverse multiple preset route directions and calculate the micro-vibration ratio of each meteorological point under each route direction. The distribution map drawing module is used to draw a distribution map of the wind vibration ratio within a target area based on the wind vibration ratio of each meteorological point.

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