Methods, systems, and storage media for calculating the area of ​​tree felling along the diversion lines of high-voltage overhead transmission lines.

Abstract

This invention provides a method, system, and storage medium for calculating the tree felling range of a high-voltage overhead transmission line's diversion line. This method can more accurately adapt to the spatial morphology of the diversion line, integrate a digital elevation model to achieve terrain-adaptive clearance calculation, and take into account both the natural growth height of trees and the safety verification of tree fall. It relates to the field of power transmission technology. The calculation method includes: obtaining relevant basic parameters of the current diversion line in the overhead transmission line for calculating the tree felling range; constructing a three-dimensional spatial model of the current diversion line and generating discrete point cloud data of the current diversion line; calculating the spatial coordinates of the treetop at each sampling point; generating square cells centered on each sampling point to be felled and with the sampling interval as the side length; merging adjacent or overlapping cells to form a continuous felling area surface to obtain the current tree felling range of the diversion line.

Description

Technical Field

[0001] This invention relates to the field of power transmission technology, specifically a method, system, and storage medium for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead power transmission line. Background Technology

[0002] High-voltage (including ultra-high-voltage and extra-high-voltage) overhead transmission lines have advantages such as large transmission capacity, long transmission distance, and low energy consumption, making them the core carrier for cross-regional power energy allocation in my country. As a key component connecting the transmission tower and the conductor, the sag of the jumper wire (also known as a jumper) is significantly affected by the requirements of horizontal and vertical construction. To reduce the sag and wind deflection angle of the jumper wire, high-voltage overhead transmission lines typically use support pipes (or rigid jumper support pipes) for rigid fixation.

[0003] With the development of power grid construction, route resources are becoming increasingly scarce, and power lines need to traverse long distances through mountainous and forested areas, making the need for clearing passageways around tower bases increasingly urgent. Accurately calculating the scope of tree felling around the diversion lines during the transmission line design phase is a crucial prerequisite for guiding felling operations during the later construction phase, ensuring line construction, and guaranteeing long-term safe operation. Insufficient clearance between trees and diversion lines, or fallen trees touching the diversion lines, can potentially cause safety accidents such as short circuits and power outages. Therefore, it is essential to develop scientific calculation methods during the design phase to provide accurate data for confirming the felling scope during the construction period.

[0004] Currently, existing methods and systems for calculating the logging range of transmission lines have been disclosed, but they still have many shortcomings and are difficult to adapt to the calculation needs of the design phase of high-voltage overhead transmission lines. They cannot provide accurate and efficient technical support for confirming the logging range during the later construction phase. Firstly, existing methods mostly construct spatial models for the main line or side conductors of the transmission line, without considering the horizontal, arc, and vertical construction characteristics of the diversion lines. The constructed spatial models do not match the actual spatial direction and vertical shape of the diversion lines, resulting in significant deviations in the logging range calculation and failing to meet the accuracy requirements of the design phase. Secondly, when calculating the clearance distance between trees and diversion lines, a unified ground reference surface is often used, ignoring the influence of actual terrain undulations and failing to integrate the real ground elevation data from the digital elevation model (DEM). The core deficiency is... The inaccurate benchmark for calculating clearance distance allows for only a rough calculation based on simple topography, resulting in a disconnect between the calculation results and the actual site conditions. This leads to low accuracy and makes it difficult to guide precise felling during the construction phase. Thirdly, while existing technologies consider the natural growth height of trees, they do not combine this with the complex micro-topographical undulations of mountainous areas to verify the clearance distance corresponding to the growth height. The core flaw is that the growth height verification is not adapted to the characteristics of mountainous terrain, leading to inaccurate confirmation of the clearance distance between the trees and the drainage line after growth. At the same time, the complex mountainous terrain and special tree growth environment make it difficult for existing technologies to accurately verify the three-dimensional falling trajectory of mountain trees. This makes it impossible to accurately determine the safety threat to the drainage line after the trees fall, resulting in an incomplete determination of the felling range calculated during the design phase. This can easily lead to omissions or over-feeding during the construction phase, posing potential safety hazards and wasting resources.

[0005] In summary, existing technologies suffer from problems such as poor adaptability of diversion line models, inaccurate benchmarks for calculating clearance distances, and incomplete verification of tree growth and fall in mountainous areas. Therefore, there is an urgent need for a method to calculate the logging range that can accurately adapt to the morphological characteristics of high-voltage overhead transmission line diversion lines, integrate DEM elevation models, and take into account tree growth and fall verification. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a method, system and storage medium for calculating the range of tree felling for high-voltage overhead transmission line diversion lines that can more accurately adapt to the spatial morphology of the diversion line, integrate digital elevation models to realize terrain-adaptive clearance calculation, and take into account both the natural growth height of trees and the dual safety verification of falling trees, so as to solve the problems of poor adaptability of diversion line models, inaccurate clearance distance calculation benchmarks and imperfect verification of tree growth and falling in mountainous areas in the existing technology.

[0007] The technical solution adopted by this invention to solve its technical problem is: a method for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line, comprising the following steps: S1. Obtain the relevant basic parameters of the current diversion line for calculating the tree felling range in the overhead transmission line, the basic parameters including: Tower location spatial positioning parameters: including the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, and the plane coordinates of adjacent towers; Hanging point size parameters: including the length of the conductor hanging point crossarm, the length, width, and height of the hanging point crossarm of the current diversion line on the tower; Insulator string size parameters: including the sag length of the insulator string of the current lead wire, the length of the support pipe, the length of the tension strings on both large and small sides, and the downward tilt angle; Current construction control parameters for the diversion line include: construction horizontal arc sag value, specific load, and horizontal stress of the power line; Topography and tree parameters: including digital elevation model data of the area where the current diversion line tower is located, natural tree height, net clearance control distance for natural tree height, and safety control gap for tree falling; S2. Construct a three-dimensional spatial model of the current drainage line based on the aforementioned basic parameters, and generate discretized point cloud data of the current drainage line; S3. Taking the tower where the current diversion line is located as the center, expand outward by a set distance along the line direction and its perpendicular direction to form a sampling area covering the area around the current diversion line; generate dense sampling points within the sampling area according to the set sampling interval; then extract the ground elevation of each sampling point based on the digital elevation model data to obtain the ground coordinates of each sampling point, and then calculate the spatial position coordinates of the treetop of each sampling point by combining the natural growth height of the trees. S4. For each of the sampling points, based on the discretized point cloud data, perform the following calculations and comparisons: Calculate the minimum clearance distance L1 between the sampling point's treetop spatial coordinates and the current drainage line when the tree is standing upright; Using the ground coordinates of the sampling point as the fulcrum for the tree to fall, calculate the minimum clearance distance L2 between the fulcrum and the current drainage line; The L1 is compared with the clearance control distance of the tree's natural growth height, and the L2 is compared with the tree's falling control distance; wherein, the tree falling control distance is equal to the sum of the tree's natural growth height and the tree falling safety control gap; S5. Mark the sampling points that satisfy L1≤natural growth height clearance control distance or L2≤tree falling control distance as sampling points that need to be felled; S6. Generate a square cell with each sampling point to be felled as the center and the sampling interval as the side length. Merge adjacent or overlapping cells to form a continuous felling area to obtain the current tree felling range of the diversion line.

[0008] Further, step S2 includes: S21. Calculate the tower rotation angle based on the plane coordinates of the adjacent towers; S22. Based on the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, the length of the crossarm of the conductor hanging point, the length, width, and height of the crossarm of the diversion line hanging point, as well as the length and downward tilt angle of the tension string on both sides of the current diversion line, and in combination with the tower rotation angle, calculate the spatial coordinates of the hanging point on the diversion line side of the tension string. S23. Based on the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, the length, width, and height of the crossarm of the diversion line hanging point, as well as the drooping length of the insulator string and the length of the support pipe of the current diversion line, calculate the spatial coordinates of the hanging point of the jumper string of the diversion line. S24. Taking the side hanging point of the guide line and the end hanging point of the guide line jumper string of the tension string as the two ends hanging points of the current guide line, and combining the construction control parameters of the current guide line, the shape parameters of the catenary are iteratively calculated using the catenary model until the horizontal arc sag reaches the construction horizontal arc sag control value, thereby constructing a three-dimensional space model of the current guide line. S25. Based on the three-dimensional spatial model, generate a discrete spatial point set of the current drainage line through a discretization algorithm.

[0009] Furthermore, the catenary model is as follows: ; ; in, This is the specific load of the current diversion line; The horizontal stress of the current drain wire; This represents the horizontal projection distance between the two hanging points at the current drainage line; The elevation difference angle between the two hanging points at the current drainage line; Let the spatial coordinates of the two ends of the drainage line be (x1, y1, z1) and (x2, y2, z2) respectively, then: ; .

[0010] Furthermore, the sampling area is rectangular.

[0011] Furthermore, L1 is obtained by calculating the minimum Euclidean distance between the point where the treetop spatial coordinates are located and the discretized point cloud data; L2 is obtained by calculating the minimum Euclidean distance between the pivot point and the discretized point cloud data.

[0012] Furthermore, the sampling interval is 0.5m to 2m.

[0013] A system for calculating the felling range of trees along the diversion lines of high-voltage overhead transmission lines is used to implement the aforementioned method for calculating the felling range of trees along the diversion lines of high-voltage overhead transmission lines, including: The data acquisition module is configured to execute step S1; The 3D modeling module is configured to perform step S2; The sampling module is configured to perform step S3; A dual verification module is configured to execute steps S4 and S5; A logging area determination module is configured to perform step S6; and, The drawing output module is configured to output logging area drawings with planar coordinates.

[0014] A computer-readable storage medium is characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, it implements the above-mentioned method for calculating the range of tree felling along the diversion line of a high-voltage overhead transmission line.

[0015] The beneficial effects of this invention are as follows: The calculation method of this invention constructs a three-dimensional spatial model and generates a discretized point cloud by acquiring the specific hanging point size, insulator string size and construction control parameters of the diversion line, accurately restoring the actual shape of the diversion line and solving the problem of poor model adaptability; at the same time, it integrates DEM data to generate the ground coordinates of sampling points with the real ground elevation and calculates the tree top coordinates, so that the net distance calculation fits the complex terrain and overcomes the insufficient accuracy caused by the unified reference surface; furthermore, it calculates the tree top growth net distance L1 and the ground point tilting net distance L2 for each sampling point and compares them with the corresponding control values, realizing a comprehensive verification of dual threats and avoiding the omission or over-cutting of felling; finally, it generates cells from the sampling points to be felled and merges them into a continuous area surface to directly output the felling range, forming a complete closed loop from parameters to results, systematically improving the calculation accuracy, judgment comprehensiveness and engineering practicality. Attached Figure Description

[0016] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, the method for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line according to the present invention includes the following steps: S1. Obtain the relevant basic parameters of the current diversion line for calculating the tree felling range in the overhead transmission line, the basic parameters including: Tower location spatial positioning parameters: including the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, and the plane coordinates of adjacent towers; among which, the plane coordinates of adjacent towers include the plane coordinates of the two towers that are adjacent to each other in front and behind. Hanging point size parameters: including the length, width, and height of the crossarm of the current drop line hanging point, as well as the length of the crossarm of the conductor hanging point on the tower where the current drop line is located; Insulator string size parameters: including the sag length of the insulator string of the current lead wire, the length of the support pipe, the length of the tension strings on both large and small sides, and the downward tilt angle; Current construction control parameters for the diversion line include: construction horizontal arc sag value, specific load, and horizontal stress of the power line; Topography and tree parameters: including digital elevation model data of the area where the current diversion line tower is located, natural tree height, net clearance control distance for natural tree height, and safety control gap for tree falling; S2. Construct a three-dimensional spatial model of the current drainage line based on the aforementioned basic parameters, and generate discretized point cloud data of the current drainage line; S3. Taking the tower where the current diversion line is located as the center, expand outward by a set distance along the line direction and its perpendicular direction to form a sampling area covering the area around the current diversion line; generate dense sampling points within the sampling area according to the set sampling interval; then extract the ground elevation of each sampling point based on the digital elevation model data to obtain the ground coordinates of each sampling point, and then calculate the spatial position coordinates of the treetop of each sampling point by combining the natural growth height of the trees. S4. For each of the sampling points, based on the discretized point cloud data, perform the following calculations and comparisons: Calculate the minimum clearance distance L1 between the sampling point's treetop spatial coordinates and the current drainage line when the tree is standing upright; Using the ground coordinates of the sampling point as the fulcrum for the tree to fall, calculate the minimum clearance distance L2 between the fulcrum and the current drainage line; The L1 is compared with the clearance control distance of the tree's natural growth height, and the L2 is compared with the tree's falling control distance; wherein, the tree falling control distance is equal to the sum of the tree's natural growth height and the tree falling safety control gap; S5. Mark the sampling points that satisfy L1≤natural growth height clearance control distance or L2≤tree falling control distance as sampling points that need to be felled; S6. Generate a square cell with each sampling point to be felled as the center and the sampling interval as the side length. Merge adjacent or overlapping cells to form a continuous felling area to obtain the current tree felling range of the diversion line.

[0019] The natural growth height of trees is generally determined based on the tree species and statistical values. For example, the typical growth height of pine trees is 15-20m, so the natural growth height of pine trees is taken within the range of 15-20m. In this embodiment of the invention, the natural growth height of the pine tree is taken as 18m.

[0020] The clearance control distance based on the natural growth height of trees refers to the minimum permissible clearance distance between trees and power lines. This distance is determined according to the transmission voltage level of the power line, and specific values ​​can be found in relevant industry design manuals or regulations.

[0021] The tree fall safety control clearance refers to the minimum distance that must be maintained between the treetop and the drain line to meet electrical safety requirements when the treetop approaches the drain line during the fall process. This clearance is checked against the minimum operating voltage clearance and determined according to the voltage level and altitude conditions of the transmission line. Specific values ​​can be found in relevant industry regulations or design manuals.

[0022] The specific calculation process for the ground coordinates and treetop coordinates of the sampling points: For each sampling point within the sampling area (with planar coordinates Xi, Yi), the corresponding ground elevation value Zi is first obtained from the Digital Elevation Model (DEM) data based on its planar coordinates. This elevation value is then combined with the planar coordinates of the sampling point to obtain the ground coordinates Pi = (Xi, Yi, Zi). Next, based on the natural growth height H of the local trees, the height H is added vertically upwards from the ground coordinates to obtain the treetop spatial coordinates Qi = (Xi, Yi, Zi + H). This same process is repeated for each sampling point to obtain the ground coordinates and treetop coordinates for all sampling points.

[0023] Centered on the tower where the current diversion line is located, a set distance is extended outward along the line direction and its perpendicular direction. This set distance should cover all trees that the diversion line may affect, satisfying the following conditions: areas where the clearance between the trees and the diversion line is insufficient after natural growth; areas where fallen trees may touch the diversion line; and considering uncertainties such as wind deflection and terrain undulations. In other words, the set distance is determined by the sag range of the diversion line, the radius of the fallen trees, the wind deflection range, and the safety margin. In engineering practice, the set distance is typically 50-100m forward and backward, and 30-50m to the left and right, and can be adjusted according to voltage level and site conditions. The resulting sampling area can be circular (with the tower as the center and the maximum influence distance as the radius), irregular polygonal, elliptical, etc. In this embodiment of the invention, the transmission line voltage is 800kV, and the sampling area extends 50m forward and backward along the line direction and 50m to the left and right along the direction perpendicular to the line (i.e., the crossarm direction), forming a rectangular sampling area of ​​100m × 100m centered on the tower's center pile. The rectangular sampling area has the following advantages: it can completely cover the sag range of the diversion line and the fallen tree area along the route direction and vertical direction, avoiding omissions; at the same time, the regular row and column grid facilitates the generation of dense sampling points at fixed intervals, which can efficiently extract ground elevation from DEM in batches; in addition, the square cells generated with the sampling points to be felled as the center can be naturally aligned with the rectangular area, so that the felled area surface formed by subsequent merging is neat and fragmented, and no complex coordinate transformation is required, the amount of calculation is controllable, and it is suitable for batch application in engineering.

[0024] The sampling interval directly affects the accuracy and efficiency of the calculation: a smaller interval results in denser sampling points, more detailed descriptions of terrain and tree locations, and more accurate calculations of clearance distances and logging boundaries, but the computational load (number of sampling points) increases quadratically; a larger interval results in faster calculations, but may miss critical locations (such as localized protruding terrain or individual prominent trees), leading to rough logging boundaries or omission of dangerous points. A spacing of 0.5m to 2m is typically used to balance accuracy and efficiency. Ideally, the sampling interval is 0.5m.

[0025] The calculation method of this invention constructs a three-dimensional spatial model and generates a discretized point cloud by acquiring the specific hanging point size, insulator string size, and construction control parameters of the diversion line, accurately restoring the actual shape of the diversion line and solving the problem of poor model adaptability. At the same time, it integrates DEM data to generate ground coordinates of sampling points based on real ground elevation and calculates tree top coordinates, making the clearance distance calculation fit the complex terrain and overcoming the insufficient accuracy caused by a unified reference surface. Furthermore, it calculates the tree top growth clearance distance L1 and the ground point tilt clearance distance L2 for each sampling point and compares them with the corresponding control values, realizing comprehensive verification of dual threats and avoiding missed or excessive felling. Finally, it generates cells from the sampling points to be felled and merges them into a continuous area surface to directly output the felling range, forming a complete closed loop from parameters to results, systematically improving the calculation accuracy, judgment comprehensiveness, and engineering practicality.

[0026] In this embodiment of the invention, specifically, step S2 includes: S21. Calculate the tower rotation angle based on the plane coordinates of the adjacent towers; S22. Based on the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, the length of the crossarm of the conductor hanging point, the length, width, and height of the crossarm of the diversion line hanging point, as well as the length and downward tilt angle of the tension string on both sides of the current diversion line, and in combination with the tower rotation angle, calculate the spatial coordinates of the hanging point on the diversion line side of the tension string. S23. Based on the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, the length, width, and height of the crossarm of the diversion line hanging point, as well as the drooping length of the insulator string and the length of the support pipe of the current diversion line, calculate the spatial coordinates of the hanging point of the jumper string of the diversion line. S24. Using the side hanging point of the drain line and the end hanging point of the drain line jumper string of the tension string as the two hanging points of the current drain line, and combining the construction control parameters of the current drain line (construction horizontal sag value, drain line specific load and wire horizontal stress), the shape parameters of the catenary are iteratively calculated using the catenary model until the horizontal sag reaches the construction horizontal sag control value, thereby constructing a three-dimensional spatial model of the current drain line. S25. Based on the three-dimensional spatial model, generate a discrete spatial point set of the current drainage line through a discretization algorithm.

[0027] The specific process of calculating the tower's rotation angle: Let the tower where the current diversion line is located (the current tower) be B, the previous tower be A, and the next tower be C. The planar coordinates of the three towers are (xA, yA), (xB, yB), and (xC, yC), respectively. Calculate the direction angle from B to A (the direction of the line's smaller side): ; Calculate the direction angle from B to C (direction on the larger side of the line): ; Calculate the direction angle difference: ; Convert the difference to line angle: ; Simultaneously record the turning direction (left or right) for subsequent coordinate rotation transformations.

[0028] Calculation of the spatial coordinates of the side hanging point of the tension string's drain line: Tension tower side hanging point The coordinates are obtained by adding the crossarm offset and the line offset to the center coordinates of the tower: ; Where (xB, yB, zB) are the center coordinates of the tower where the current diversion line is located, zB is the center pile elevation (ground elevation) of the tower where the current diversion line is located, and xB and yB are the plane coordinates of the tower where the current diversion line is located. W is the height of the crossarm at the current drop line hanging point on the tower where the current drop line is located; W is the width of the crossarm at the current drop line hanging point on the tower. The length of the crossarm at the current drop line hanging point on the tower where the drop line is located; The unit vector is the crossarm direction of the current diversion line hanging point on the tower where the current diversion line is located. The unit direction vector is the vector pointing from the current tower to the towers on both sides. The direction of the angle bisector of the line turning angle is obtained by summing the vectors and then normalizing the calculation. The unit vector representing the direction of travel (from the smaller side to the larger side), and... They are perpendicular to each other; the ± sign is selected based on the size: the larger size is positive, and the smaller size is negative.

[0029] The length of the tension string extending from the side hanging point of the tower along the direction of the tension string The side hanging point of the drain wire of the tension string is obtained. : ); in, This is the length of the tension string on the corresponding side of the current drainage line (the length of the tension string on the smaller side is used when calculating the smaller side, and the length of the tension string on the larger side is used when calculating the larger side). The downward inclination angle of the tension string on the corresponding side of the current drainage line; It is a vertically upward unit vector (in the opposite direction of gravity). ; The unit vector representing the extension direction of the tension string is the normalized unit direction vector from the anchor point of this tower to the anchor point of the next base tower.

[0030] Calculation of spatial coordinates of the jumper connection point of the drainage line: First, determine the coordinates of the suspension point of the jumper cable on the tower. : ; The drain cable has a support tube. First, extend the support tube horizontally along the crossarm direction (perpendicular to the line) to the end of the support tube, then vertically lower the jumper string by its drooping length. = ; ; in, The spatial coordinates of the connection point of the jumper wire of the drainage line; This is the current droop length of the insulator string of the drain wire; This is the length of the support tube for the current drainage line.

[0031] The specific process of constructing a three-dimensional spatial model of the drainage line: Let the spatial coordinates of the two ends of the drainage line be (x1, y1, z1) and (x2, y2, z2) respectively. Then the horizontal projection distance between the two ends of the drainage line is... : ; The height difference angle between the hanging points at both ends of the drainage line ; ; Based on the horizontal stress of the drain wire Given the specific load γ, the sag is calculated using the catenary equation: ; Calculated The horizontal and vertical control values ​​required for construction In comparison, if Then adjust Recalculate until convergence. Wherein, This is the preset allowable error.

[0032] After convergence, the equation of the catenary that satisfies the construction principle of horizontal arc and vertical slope is obtained. In the local coordinate system (with the origin at one end and the x-axis pointing horizontally to the other end), the coordinates of any point on the drainage line are: ; Finally, the curve in the local coordinate system is transformed to the global coordinate system through rotation and translation transformations to obtain the three-dimensional spatial model of the drainage line.

[0033] The specific process of generating discrete spatial point sets based on a three-dimensional spatial model: In the local coordinate system, along the x-axis from 0 to... lPoints are taken at equal intervals, with a step size Δx = d (which can also be adaptively adjusted according to the curve length). Each discrete point (xi, yi) is calculated using the catenary equation; The discrete points in the local coordinate system are transformed to the global coordinate system through rotation and translation transformation matrices to obtain the global coordinate points (Xi, Yi, Zi); For the jumper support tube (rigid part), it is discretized as a straight line segment at equal intervals to obtain the global coordinate point set of the support tube; The point cloud of the drainage line is merged with the point cloud of the support pipe to form a complete discrete spatial point set {Si} of the drainage line; this point set is used for subsequent calculation of the minimum clearance distance with the tree sampling points. The distance from the sampling step d should be less than the sampling interval (for example, when the sampling interval is 1m, the distance from the sampling step can be 0.5m) to ensure that the calculated minimum clearance distance has sufficient accuracy.

[0034] In this embodiment of the invention, L1 is obtained by calculating the minimum Euclidean distance between the point where the tree top spatial coordinates are located (tree vertex) and the discretized point cloud data: traversing all discrete points in the point cloud, calculating the Euclidean distance between the tree vertex and each discrete point in turn, and taking the minimum value as L1. L2 is obtained by calculating the minimum Euclidean distance between the pivot point and the discretized point cloud data, and its calculation method is the same as that of L1, which will not be described in detail here.

[0035] It is understood that in other embodiments, analytical methods or other optimization algorithms may be used to directly calculate the shortest distance from the spatial point to the spatial curve of the drainage line.

[0036] This invention also provides a system for calculating the felling range of trees along the diversion line of a high-voltage overhead transmission line, used to implement the above-mentioned method for calculating the felling range of trees along the diversion line of a high-voltage overhead transmission line, including: The data acquisition module is configured to execute step S1; The 3D modeling module is configured to perform step S2; The sampling module is configured to perform step S3; A dual verification module is configured to execute steps S4 and S5; A logging area determination module is configured to perform step S6; and, The drawing output module is configured to output logging area drawings with planar coordinates.

[0037] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-described method for calculating the felling range of trees along the diversion line of a high-voltage overhead transmission line.

Claims

1. A method for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line, characterized in that, Includes the following steps: S1. Obtain the relevant basic parameters of the current diversion line for calculating the tree felling range in the overhead transmission line, the basic parameters including: Tower location spatial positioning parameters: including the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, and the plane coordinates of adjacent towers; Hanging point size parameters: including the length of the conductor hanging point crossarm, the length, width, and height of the hanging point crossarm of the current diversion line on the tower; Insulator string size parameters: including the sag length of the insulator string of the current lead wire, the length of the support pipe, the length of the tension strings on both large and small sides, and the downward tilt angle; Current construction control parameters for the diversion line include: construction horizontal arc sag value, specific load, and horizontal stress of the power line; Topography and tree parameters: including digital elevation model data of the area where the current diversion line tower is located, natural tree height, net clearance control distance for natural tree height, and safety control gap for tree falling; S2. Construct a three-dimensional spatial model of the current drainage line based on the aforementioned basic parameters, and generate discretized point cloud data of the current drainage line; S3. Taking the tower where the current diversion line is located as the center, expand outward by a set distance along the line direction and its perpendicular direction to form a sampling area covering the area around the current diversion line; generate dense sampling points within the sampling area according to the set sampling interval; then extract the ground elevation of each sampling point based on the digital elevation model data to obtain the ground coordinates of each sampling point, and then calculate the spatial position coordinates of the treetop of each sampling point by combining the natural growth height of the trees. S4. For each of the sampling points, based on the discretized point cloud data, perform the following calculations and comparisons: Calculate the minimum clearance distance L1 between the sampling point's treetop spatial coordinates and the current drainage line when the tree is standing upright; Using the ground coordinates of the sampling point as the fulcrum for the tree to fall, calculate the minimum clearance distance L2 between the fulcrum and the current drainage line; The L1 is compared with the clearance control distance of the tree's natural growth height, and the L2 is compared with the tree's falling control distance; wherein, the tree falling control distance is equal to the sum of the tree's natural growth height and the tree falling safety control gap; S5. Mark the sampling points that satisfy L1≤natural growth height clearance control distance or L2≤tree falling control distance as sampling points that need to be felled; S6. Generate a square cell with each sampling point to be felled as the center and the sampling interval as the side length. Merge adjacent or overlapping cells to form a continuous felling area to obtain the current tree felling range of the diversion line.

2. The method for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line as described in claim 1, characterized in that, Step S2 includes: S21. Calculate the tower rotation angle based on the plane coordinates of the adjacent towers; S22. Based on the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, the length of the crossarm of the conductor hanging point, the length, width, and height of the crossarm of the diversion line hanging point, as well as the length and downward tilt angle of the tension string on both sides of the current diversion line, and in combination with the tower rotation angle, calculate the spatial coordinates of the hanging point on the diversion line side of the tension string. S23. Based on the plane coordinates of the tower where the current diversion line is located, the elevation of the center pile, the length, width, and height of the crossarm of the diversion line hanging point, as well as the drooping length of the insulator string and the length of the support pipe of the current diversion line, calculate the spatial coordinates of the hanging point of the jumper string of the diversion line. S24. Taking the side hanging point of the guide line and the end hanging point of the guide line jumper string of the tension string as the two ends hanging points of the current guide line, and combining the construction control parameters of the current guide line, the shape parameters of the catenary are iteratively calculated using the catenary model until the horizontal arc sag reaches the construction horizontal arc sag control value, thereby constructing a three-dimensional space model of the current guide line. S25. Based on the three-dimensional spatial model, generate a discrete spatial point set of the current drainage line through a discretization algorithm.

3. The method for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line as described in claim 2, characterized in that, The catenary model is as follows: ； ； in, This is the specific load of the current diversion line; The horizontal stress of the current drain wire; This represents the horizontal projection distance between the two hanging points at the current drainage line; The elevation difference angle between the two hanging points at the current drainage line; Let the spatial coordinates of the two ends of the drainage line be (x1, y1, z1) and (x2, y2, z2) respectively, then: ； 。 4. The method for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line as described in claim 1, characterized in that, The sampling area is rectangular.

5. The method for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line as described in claim 1, characterized in that, L1 is obtained by calculating the minimum Euclidean distance between the point where the treetop spatial coordinates are located and the discretized point cloud data; L2 is obtained by calculating the minimum Euclidean distance between the pivot point and the discretized point cloud data.

6. The method for calculating the felling range of trees along the diversion line of a high-voltage overhead transmission line as described in claim 1, characterized in that, The sampling interval is 0.5m to 2m.

7. A system for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line, used to implement the method for calculating the area of ​​tree felling along the diversion line of a high-voltage overhead transmission line as described in any one of claims 1 to 6, characterized in that, include: The data acquisition module is configured to execute step S1; The 3D modeling module is configured to perform step S2; The sampling module is configured to perform step S3; A dual verification module is configured to execute steps S4 and S5; A logging area determination module is configured to perform step S6; and, The drawing output module is configured to output logging area drawings with planar coordinates.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method for calculating the felling range of trees along the diversion line of a high-voltage overhead transmission line as described in any one of claims 1 to 6.

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