Power transmission line tangent tower head design method, device and equipment, readable storage medium and program product

Abstract

The invention relates to a power transmission line tangent tower head design method, device and equipment, a storage medium and a program product, and relates to the technical field of power design. The accuracy and safety of tower head design can be improved. The method comprises the following steps: acquiring a windage yaw swing angle and an electrical gap threshold value of an insulator string under each preset working condition; constructing three-dimensional space models respectively corresponding to a tangent tower, a power transmission line and an insulator string in the power transmission system; taking a preset swing angle as a starting point, constructing a three-dimensional gap ball model according to a grading ring of the insulator string and an electrical gap threshold value, and constructing a three-dimensional gap cylinder model according to a lead inclination line of the power transmission system and the electrical gap threshold value; and based on the three-dimensional space model, cyclic three-dimensional collision detection is conducted on the three-dimensional gap ball model and the three-dimensional gap cylinder model till collision occurs, an updated target swing angle is obtained, and if the target swing angle is larger than the wind deflection swing angle, it is confirmed that the tower head of the tangent tower meets the size requirement.

Description

Technical Field

[0001] This application relates to the field of power design technology, and in particular to a design method, apparatus, computer equipment, computer-readable storage medium, and computer program product for the tower head of a straight-line transmission line tower. Background Technology

[0002] With the power system evolving towards ultra-high voltage, ultra-large capacity, and inter-regional power transmission driven by the "dual-carbon" strategy, the design of transmission line tower heads faces significant challenges. Enhancing the electrical safety of towers in the face of complex external conditions such as ultra-high voltage, high altitude, and extreme weather has become one of the key difficulties in transmission line design.

[0003] Current design specifications employ a two-dimensional projection method based on constructing a gap circle using static small sag. This method involves drawing the gap circle between the energized parts and tower components based on a pre-defined static small sag and the air gap under various operating conditions, thereby planning the tower head dimensions. While this method demonstrates good applicability in conventional lines, it does not consider the air gap deviations caused by variations in the inclination angle and width of crossarms at different levels and the unequal widths of the cylinder openings at the top and bottom of the tower in three-dimensional space. This presents limitations, especially in complex scenarios such as ultra-high voltage and high-altitude environments, and can easily lead to safety accidents due to insufficient insulation margin, resulting in relatively low safety. Summary of the Invention

[0004] Therefore, it is necessary to provide a design method, apparatus, computer equipment, computer-readable storage medium, and computer program product for the tower head of a straight-line tower of a transmission line, in response to the above-mentioned technical problems.

[0005] In a first aspect, this application provides a design method for the tower head of a straight-line transmission tower, including:

[0006] The wind deflection sway angle of insulator strings in the power transmission system under various preset operating conditions is obtained, and the electrical clearance threshold corresponding to each preset operating condition is obtained; the preset operating conditions include live working, switching overvoltage, power frequency voltage and lightning overvoltage;

[0007] Three-dimensional spatial models of the straight towers, transmission lines, and insulator strings in the power transmission system are constructed using parametric modeling methods.

[0008] Starting from a preset swing angle, a three-dimensional gap sphere model is constructed based on the equalizing ring of the insulator string and the electrical gap threshold, and a three-dimensional gap cylinder model is constructed based on the conductor tilt line of the power transmission system and the electrical gap threshold.

[0009] Based on the three-dimensional spatial model, cyclic three-dimensional collision detection is performed on the three-dimensional gap sphere model and the three-dimensional gap cylinder model until a collision occurs, and the updated target sway angle is obtained. If the target sway angle is greater than the wind sway angle, it is confirmed that the tower head of the straight tower meets the size requirements.

[0010] In one embodiment, the step of performing cyclic three-dimensional collision detection on the three-dimensional gap sphere model and the three-dimensional gap cylinder model based on the three-dimensional spatial model includes:

[0011] Based on the three-dimensional spatial model, the three-dimensional gap sphere model is subjected to a first collision detection with the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower by solving the equation of minimum distance between points and surfaces. Based on the three-dimensional spatial model, the equations of each model are established by geometric intersection detection method, and the surface of the three-dimensional gap cylinder model is subjected to a second collision detection with the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower. If at least one of the first collision detection and the second collision detection fails, the tower head of the straight tower is sized and the process returns to the steps of constructing the three-dimensional gap sphere model based on the equalization ring of the insulator string and the electrical clearance threshold, and constructing the three-dimensional gap cylinder model based on the conductor inclination line of the power transmission system and the electrical clearance threshold.

[0012] In one embodiment, the first collision detection of the three-dimensional gap sphere model with the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower, based on the three-dimensional spatial model and by solving the equation for the minimum distance between points and surfaces, includes:

[0013] Based on the target point and the target plane, the minimum distance between the point and the plane is determined by solving the equation; if the minimum distance between the point and the plane is less than the electrical clearance threshold, the first collision detection is confirmed to have failed; if the minimum distance between the point and the plane is greater than or equal to the electrical clearance threshold, the first collision detection is confirmed to have passed.

[0014] In one embodiment, before constructing a three-dimensional gap sphere model based on the equalizing ring of the insulator string and the electrical gap threshold, the method further includes: determining the first spatial coordinates of the equalizing ring of the insulator string based on the preset swing angle, and determining the height of the equalizing ring based on the first spatial coordinates;

[0015] Constructing a three-dimensional gap sphere model based on the equalizing ring of the insulator string and the electrical gap threshold includes: taking the height of the equalizing ring as the center and the electrical gap threshold as the radius to construct the three-dimensional gap sphere model.

[0016] In one embodiment, before constructing the three-dimensional gap cylinder model based on the conductor tilt line of the power transmission system and the electrical clearance threshold, the method further includes: determining the second spatial coordinates corresponding to the split conductor based on the preset swing angle, and determining the conductor tilt line based on the second spatial coordinates and the sag angle;

[0017] The step of constructing a three-dimensional gap cylinder model based on the conductor inclination line of the power transmission system and the electrical clearance threshold includes: using the conductor inclination line as the central axis of the three-dimensional gap cylinder model and the electrical clearance threshold as the radius to construct the three-dimensional gap cylinder model.

[0018] In one embodiment, obtaining the wind deflection sway angle of the insulator string in the power transmission system under various preset operating conditions includes:

[0019] The vertical load of the transmission line is determined based on the vertical load of the power line, the vertical span, and the number of power line splits under each preset working condition. The wind load of the insulator string under each preset working condition is determined based on the number of insulators connected in the vertical wind direction, the wind load shielding reduction factor of the insulators in the wind direction, the basic wind speed under each preset working condition, the height and story height of the straight tower, the length of the insulator string, the wind load amplification factor of the insulator string icing, and the number of single insulator pieces in the insulator string. The horizontal load of the transmission line on the insulator string is determined based on the horizontal load and tension of the transmission line under each preset working condition, the rotation angle of the straight tower, and the horizontal span under each preset working condition. The wind deflection sway angle is obtained based on the string weight of the insulator string, the vertical load, the wind load of the insulator string, and the horizontal load.

[0020] Secondly, this application also provides a design device for the tower head of a straight-line transmission tower, comprising:

[0021] The data acquisition module is used to acquire the wind deflection sway angle of the insulator string in the power transmission system under various preset operating conditions, and to acquire the electrical clearance threshold corresponding to each preset operating condition; the preset operating conditions include live working, switching overvoltage, power frequency voltage and lightning overvoltage;

[0022] The first construction module is used to construct three-dimensional spatial models of the straight towers, transmission lines and insulator strings in the power transmission system through parametric modeling methods.

[0023] The second construction module is used to construct a three-dimensional gap sphere model based on the equalizing ring of the insulator string and the electrical gap threshold, with a preset swing angle as the starting point, and to construct a three-dimensional gap cylinder model based on the conductor tilt line of the power transmission system and the electrical gap threshold.

[0024] The collision detection module is used to perform cyclical three-dimensional collision detection on the three-dimensional gap sphere model and the three-dimensional gap cylinder model based on the three-dimensional spatial model until a collision occurs, and obtain the updated target sway angle. If the target sway angle is greater than the wind sway angle, it is confirmed that the tower head of the straight tower meets the size requirements.

[0025] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0026] The wind-induced sway angle of insulator strings in a power transmission system under various preset operating conditions is obtained, and the corresponding electrical clearance threshold for each preset operating condition is also obtained. The preset operating conditions include live-line working, switching overvoltage, power frequency voltage, and lightning overvoltage. A three-dimensional spatial model is constructed for the straight-line tower, transmission line, and insulator strings in the power transmission system using a parametric modeling method. Starting from the preset sway angle, a three-dimensional gap sphere model is constructed based on the equalization ring of the insulator string and the electrical clearance threshold, and a three-dimensional gap cylinder model is constructed based on the conductor tilt line of the power transmission system and the electrical clearance threshold. Based on the three-dimensional spatial model, a cyclic three-dimensional collision detection is performed on the three-dimensional gap sphere model and the three-dimensional gap cylinder model until a collision occurs, resulting in an updated target sway angle. If the target sway angle is greater than the wind-induced sway angle, the tower head of the straight-line tower is confirmed to meet the size requirements.

[0027] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0028] The wind-induced sway angle of insulator strings in a power transmission system under various preset operating conditions is obtained, and the corresponding electrical clearance threshold for each preset operating condition is also obtained. The preset operating conditions include live-line working, switching overvoltage, power frequency voltage, and lightning overvoltage. A three-dimensional spatial model is constructed for the straight-line tower, transmission line, and insulator strings in the power transmission system using a parametric modeling method. Starting from the preset sway angle, a three-dimensional gap sphere model is constructed based on the equalization ring of the insulator string and the electrical clearance threshold, and a three-dimensional gap cylinder model is constructed based on the conductor tilt line of the power transmission system and the electrical clearance threshold. Based on the three-dimensional spatial model, a cyclic three-dimensional collision detection is performed on the three-dimensional gap sphere model and the three-dimensional gap cylinder model until a collision occurs, resulting in an updated target sway angle. If the target sway angle is greater than the wind-induced sway angle, the tower head of the straight-line tower is confirmed to meet the size requirements.

[0029] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0030] The wind-induced sway angle of insulator strings in a power transmission system under various preset operating conditions is obtained, and the corresponding electrical clearance threshold for each preset operating condition is also obtained. The preset operating conditions include live-line working, switching overvoltage, power frequency voltage, and lightning overvoltage. A three-dimensional spatial model is constructed for the straight-line tower, transmission line, and insulator strings in the power transmission system using a parametric modeling method. Starting from the preset sway angle, a three-dimensional gap sphere model is constructed based on the equalization ring of the insulator string and the electrical clearance threshold, and a three-dimensional gap cylinder model is constructed based on the conductor tilt line of the power transmission system and the electrical clearance threshold. Based on the three-dimensional spatial model, a cyclic three-dimensional collision detection is performed on the three-dimensional gap sphere model and the three-dimensional gap cylinder model until a collision occurs, resulting in an updated target sway angle. If the target sway angle is greater than the wind-induced sway angle, the tower head of the straight-line tower is confirmed to meet the size requirements.

[0031] The aforementioned design method, device, computer equipment, computer-readable storage medium, and computer program product for the tower head of a straight-line transmission line tower constructs an actual three-dimensional scene of the straight-line tower, transmission line, and insulator string. It performs cyclical three-dimensional collision detection on a three-dimensional gap sphere model and a three-dimensional gap cylinder model until a collision occurs, obtaining an updated target sway angle. The tower head dimensions are then verified based on the target sway angle. If the target sway angle is greater than the wind-induced sway angle, the tower head is confirmed to meet the dimensional requirements. This application addresses the challenge of collision detection on curved surfaces by performing high-precision scene analysis. Through logical problem decomposition and coordinate matrix transformation, it achieves accurate calculations of spherical, cylindrical, and straight-line tower components. Solving the three-dimensional parametric equations avoids insufficient or excessive clearance margins caused by spatial deviations, significantly improving the accuracy and safety of tower head design. It also reduces errors and omissions in the design process and effectively avoids safety hazards in engineering. This is of great significance for controlling engineering costs and reducing the workload and construction difficulty in later stages. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is an application environment diagram of the design method for the tower head of a straight-line transmission line in one embodiment;

[0034] Figure 2 This is a flowchart illustrating a design method for the tower head of a straight-line transmission line in one embodiment;

[0035] Figure 3 This is a schematic diagram of a model of a straight-line tower for a transmission line in one embodiment;

[0036] Figure 4 This is a flowchart illustrating the cyclical 3D collision detection steps in one embodiment;

[0037] Figure 5 This is a schematic diagram illustrating the stress analysis of an insulator string in one embodiment;

[0038] Figure 6 This is a flowchart illustrating a design method for the tower head of a straight-line transmission line in one application embodiment.

[0039] Figure 7 This is a structural block diagram of a design device for the tower head of a straight-line transmission line in one embodiment;

[0040] Figure 8 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0042] Current methods for designing the tower head of straight-line towers transform the tower head plan onto a two-dimensional projection plane, primarily relying on a pre-set static small sag and selecting appropriate dimensions by drawing gap circles. This method does not consider the differences in crossarm dimensions and upper and lower opening dimensions, and the mapping in two-dimensional space deviates from the actual three-dimensional spatial distance, easily leading to insufficient air gaps or increased investment costs. To improve the accuracy and safety of straight-line tower head design, this application proposes a precise verification method for tower head dimensions by establishing a refined parametric model of the three-dimensional scene, combining an iterative method with a three-dimensional collision detection algorithm. This method meets the requirements of current digital design and management, significantly reducing errors and omissions in the design process and effectively avoiding safety hazards in engineering.

[0043] The design method for the tower head of a straight-line transmission tower provided in this application embodiment can be applied to, for example... Figure 1 The application environment shown illustrates this. In this environment, the terminal can communicate with the server via a network. The data storage system can store the data that the server needs to process. The data storage system can be integrated onto the server or located on the cloud or other network servers. In situations such as... Figure 1 In the application environment shown, the terminal can be, but is not limited to, various personal computers, laptops, smartphones, and tablets. The server can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0044] In one embodiment, such as Figure 2 As shown, a design method for the tower head of a straight-line transmission line tower is provided, which can be applied to... Figure 1 In the terminal, the method may include the following steps:

[0045] Step S201: Obtain the wind deflection sway angle of the insulator string in the power transmission system under each preset operating condition, and obtain the electrical clearance threshold corresponding to each preset operating condition.

[0046] The preset operating conditions include live-line work, switching overvoltage, power frequency voltage, and lightning overvoltage.

[0047] Specifically, the terminal responds to the design instructions of the tower head of the straight tower of the transmission line, calculates the load of the conductor and insulator string according to the meteorological zone alignment and the planned use conditions of the straight tower, obtains the wind deflection sway angle of the insulator string under four working conditions: live working, switching overvoltage, power frequency voltage and lightning overvoltage, and takes the electrical clearance value for the above four working conditions according to the regulations and specifications.

[0048] Step S202: Construct three-dimensional spatial models of straight towers, transmission lines, and insulator strings in the power transmission system using parametric modeling methods.

[0049] Specifically, the terminal uses the center point of the cylinder opening at the bottom of the straight tower as the origin of the three-dimensional coordinate system. Through three-dimensional modeling, it can obtain parametric representations of the three-dimensional spatial models corresponding to the straight tower, transmission line, and insulator strings. Since the tower head typically performs electrical checks on the upper crossarm surface, lower crossarm surface, and tower side, and these surfaces are all trapezoidal finite planes, the tower geometry can be represented as follows: Figure 3 Modeling is performed as shown (only the middle crossarm is given as an example of specific 3D coordinates; the other crossarms are modeled in a similar manner as described below).

[0050] The length, width, and height of the crossbeam on this floor are respectively... , and The top and bottom widths of the main tower body connected to the crossarm are respectively , Therefore, the spatial coordinates of each point can be obtained. , , , , , , , , , .

[0051] The crossbeam plane CDEF of this layer: Lower crossbeam inclined surface : The sloping surface of the tower can be accessed by a straight line. : The spatial coordinates of the equalizing ring of the insulator string are: ( ), The height of the equalizing ring; the actual hanging point of the wire (height of the suspension clamp) is ( If the conductor is four-split and the spacing between the splits is... The corresponding hanging points are ( ), ( ), ( )as well as( ).

[0052] Step S203: Using a preset swing angle as the starting point, construct a three-dimensional gap sphere model based on the equalization ring of the insulator string and the electrical gap threshold, and construct a three-dimensional gap cylinder model based on the conductor tilt line of the power transmission system and the electrical gap threshold.

[0053] Specifically, the terminal uses the height of the equalizing ring of the insulator string as the center, calculates the electrical clearance value under each preset working condition, and uses it as the radius to draw a three-dimensional gap sphere model; then, according to the planned length of five meters from the outlet of the suspension angle clamp, it draws the conductor inclination line as the central axis of the three-dimensional gap cylinder, and uses the electrical clearance threshold corresponding to each preset working condition as the radius to draw the corresponding three-dimensional gap cylinder model. The specific model is referenced... Figure 3 .

[0054] Step S204: Based on the three-dimensional spatial model, perform cyclic three-dimensional collision detection on the three-dimensional gap sphere model and the three-dimensional gap cylinder model until a collision occurs, and obtain the updated target sway angle. If the target sway angle is greater than the wind sway angle, it is confirmed that the tower head of the straight tower meets the size requirements.

[0055] It should be noted that the updated target sway angle is the sway angle allowed under the current tower head size.

[0056] Specifically, based on a three-dimensional spatial model, the terminal performs a first collision detection on the three-dimensional gap sphere model and the sides, upper crossarms, and lower crossarms of the straight-line tower by solving the equation for the minimum distance between points and surfaces. Then, based on the three-dimensional spatial model, it establishes the equations for each model using a geometric intersection detection method, and performs a second collision detection on the three-dimensional gap cylinder model and the sides, upper crossarms, and lower crossarms of the straight-line tower. If at least one of the first and second collision detections fails, the tower head of the straight-line tower is sized, and the process returns to the steps of constructing a three-dimensional gap sphere model based on the equalization ring of the insulator string and the electrical clearance threshold, and constructing a three-dimensional gap cylinder model based on the conductor tilt line and the electrical clearance threshold of the power transmission system. If both the first and second collision detections pass, the updated target sway angle is obtained. If the target sway angle is greater than the wind sway angle, the loop ends, and it is confirmed that the tower head size of the straight-line tower meets the electrical safety requirements.

[0057] For example, ( For the updated swing angle, The previous swing angle, (where the iteration step size is), if If the wind sway angle is greater than that under the calculated operating condition, it indicates that the tower head dimensions meet the clearance requirements under the calculated operating condition, and the verification ends; if If the wind yaw angle is less than or equal to the calculated operating condition, then jump back to step three.

[0058] In this embodiment, by constructing an actual 3D scene of a straight-line tower, transmission line, and insulator string, cyclical 3D collision detection is performed on the 3D gap sphere model and the 3D gap cylinder model until a collision occurs, obtaining an updated target sway angle. Then, the tower head dimensions are verified based on the target sway angle. If the target sway angle is greater than the wind sway angle, the tower head of the straight-line tower is confirmed to meet the dimensional requirements. This application addresses the challenge of collision detection on curved surfaces by performing high-precision scene analysis. Through logical problem decomposition and coordinate matrix transformation, accurate calculations are achieved for spherical, cylindrical, and straight-line tower components. Solving the 3D parametric equations avoids insufficient or excessive clearance margins caused by spatial deviations, significantly improving the accuracy and safety of tower head design. It also reduces errors and omissions in the design process and effectively avoids safety hazards in engineering. This is of great significance for controlling engineering costs and reducing the workload and construction difficulty in later stages.

[0059] In one embodiment, such as Figure 4 As shown, in step S204 above, based on the three-dimensional spatial model, cyclic three-dimensional collision detection is performed on the three-dimensional gap sphere model and the three-dimensional gap cylinder model, which may include the following steps:

[0060] Step S401: Based on the three-dimensional spatial model, the first collision detection is performed on the three-dimensional gap sphere model with the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower by solving the equation of minimum distance between points and surfaces.

[0061] Step S402: Based on the three-dimensional spatial model, establish the equations of each model through the geometric intersection detection method, and perform a second collision detection on the three-dimensional gap cylinder model surface with the side of the tower body, the upper crossarm surface and the lower crossarm surface of the straight tower.

[0062] Step S403: If at least one of the first and second collision detections fails, the tower head of the straight tower is sized and the process returns to the steps of constructing a three-dimensional gap sphere model based on the equalization ring of the insulator string and the electrical clearance threshold, and constructing a three-dimensional gap cylinder model based on the conductor tilt line and the electrical clearance threshold of the power transmission system.

[0063] Specifically, the terminal performs 3D collision detection on the 3D gap sphere model and its interaction with the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower. Collision verification is performed by solving for the minimum distance between the sphere's center and the surfaces. If a point exists... ,flat The minimum distance between its points and surfaces The solution formula is as follows:

[0064]

[0065] Since the equations of each plane and the coordinates of the center of the circle have been solved in the above steps, substitute them into the minimum distance between the points and planes mentioned above. In the solution formula, if at this time If a collision occurs, the tower head dimensions need to be readjusted and recalibrated. If the gap requirement is met, continue the verification.

[0066] For the 3D gap cylinder model, 3D collision detection with the tower side, upper crossarm surface, and lower crossarm surface of the straight-line tower is also required. Parametric equations are established using the geometric intersection detection method. The specific judgment steps are as follows:

[0067] a) Determine the relative position of the plane and the gap cylinder:

[0068] Assume a finite plane lies in a plane Above, its four vertices are respectively , , and Then the plane normal vector And the plane equation is expressed as The equation for the axis of the gap cylinder is expressed as follows: Solving the two equations simultaneously, we can obtain the answer. As shown in the following formula:

[0069]

[0070] If the denominator is not zero, it means that the cylinder axis intersects the plane at... The point corresponding to the value, if This indicates that the intersection of the cylinder and the plane is an ellipse, with its center point O= If the minimum distance between the axis and the plane is checked, proceed to step b); otherwise, proceed to step c).

[0071] b) Determine the intersection of the ellipses:

[0072] The intersection point O obtained in step a) is the center of the ellipse, and the major axis is... The minor axis is , The angle between the axis and the plane, in the plane In the local coordinate system, the equation of the ellipse is:

[0073]

[0074] With the center O of the ellipse as the origin of the local coordinate system, its major axis direction... For the plane along the axis The projection direction on the surface, and its projected vector, can be obtained by the following formula:

[0075]

[0076]

[0077] Its minor axis direction and Orthogonality can be determined using the following formula:

[0078]

[0079] Next, a coordinate transformation from three-dimensional space to two-dimensional space is constructed, transforming the four vertices of the finite plane into an elliptical local coordinate system. , Corresponding projection and The direction coordinates are given by the following formula:

[0080]

[0081]

[0082] Substitute the transformed vertices into the ellipse equation for judgment. If at least one vertex is inside the ellipse, it indicates that the gap cylinder collides with the plane, and the tower head size needs to be readjusted. Jump to the steps of constructing a three-dimensional gap sphere model based on the equalizing ring of the insulator string and the electrical clearance threshold, and constructing a three-dimensional gap cylinder model based on the conductor tilt line of the power transmission system and the electrical clearance threshold. If none of them exist, it indicates that no collision occurs and the gap requirement is met, and the verification continues.

[0083] c) Verify the minimum distance between lines and surfaces:

[0084] The direction vector of the central axis of the known gap cylinder and the plane The equation of the line segment is given. The minimum distance to the plane can be obtained using the following formula:

[0085]

[0086] if This indicates that the gap meets the requirements and there is no collision, so proceed to the next verification step;

[0087] If it appears Then it is necessary to verify whether the four vertices of the finite plane are on the side of the gap cylinder and the plane. On the line of intersection. Let the axis be projected onto the plane. The straight line on is So in the plane The actual intersection distance on for Two straight lines.

[0088] From axis to plane Let the foot of the perpendicular be the origin O of the local coordinate system, and let its x-axis direction vector be... The y-axis is the projection direction of the axis, and the y-axis direction vector is... For plane Inward perpendicular to The direction can be calculated using the following formula:

[0089]

[0090]

[0091] The equations of the two lines in the projection plane are as follows:

[0092]

[0093] The local coordinate system transformation is performed on the four vertices of the finite plane, and the specific calculation is as follows:

[0094]

[0095]

[0096] The following formula can be used to determine whether a vertex lies between two lines:

[0097]

[0098] All line segments connecting vertices can be parameterized as Then, by transforming the coordinate system and simultaneously solving the equations of the vertex line segment and the line, the corresponding t value can be obtained, and its validity can be determined to determine whether they intersect.

[0099] If there is a situation where the vertex is located between two lines or the line segment connecting the vertex intersects with two straight lines, then it can be determined that the gap cylinder has collided with the finite plane. The tower head size needs to be readjusted, and the process should proceed to the steps of constructing a three-dimensional gap sphere model based on the equalization ring of the insulator string and the electrical clearance threshold, and constructing a three-dimensional gap cylinder model based on the conductor tilt line of the power transmission system and the electrical clearance threshold. If none of the above situations exist, it means that no collision has occurred and the gap requirement is met, and the verification continues.

[0100] In one embodiment, step S401, based on the three-dimensional spatial model, performs a first collision detection on the three-dimensional gap sphere model with the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower by solving the equation for the minimum distance between points and surfaces. This may include the following steps:

[0101] Based on the target point and the target plane, the minimum distance between the point and the plane is determined by solving the equation. If the minimum distance between the point and the plane is less than the electrical clearance threshold, the first collision detection is confirmed to have failed. If the minimum distance between the point and the plane is greater than or equal to the electrical clearance threshold, the first collision detection is confirmed to have passed.

[0102] Specifically, the terminal determines the minimum distance between the point and the plane by solving the equation for the minimum distance between the point and the plane based on the target point and the target plane. Then, it judges the relationship between the minimum distance between the point and the plane and the electrical clearance threshold. If the minimum distance between the point and the plane is less than the electrical clearance threshold, the first collision detection is confirmed to have failed. If the minimum distance between the point and the plane is greater than or equal to the electrical clearance threshold, the first collision detection is confirmed to have passed.

[0103] In one embodiment, before constructing a three-dimensional gap sphere model based on the equalizing rings of the insulator string and the electrical gap threshold, the method of this application further includes the following steps:

[0104] The first spatial coordinates of the equalizing ring of the insulator string are determined according to the preset swing angle, and the height of the equalizing ring is determined according to the first spatial coordinates.

[0105] Step S203, which involves constructing a three-dimensional gap sphere model based on the equalizing rings of the insulator string and the electrical gap threshold, may include the following steps:

[0106] A three-dimensional gap sphere model is constructed by taking the height of the equalizing ring as the center and the electrical clearance threshold as the radius.

[0107] Specifically, since the sides and crossarms of a straight-line tower may be inclined, there exists a sway angle during the swaying of the insulator string due to wind pressure that minimizes the distance between the charged conductor and the tower. Determining this sway angle is difficult and computationally complex. Therefore, this application combines an iterative method, using 0.5 degrees as the calculation step for the sway angle, iteratively verifying the calculation from 0 degrees to the maximum sway angle under the calculated operating conditions. If the calculated sway angle is... Then, the spatial coordinates of the equalizing ring of the insulator string at this time are:

[0108] ( )

[0109] The three-dimensional gap sphere model is as follows:

[0110]

[0111]

[0112] In one embodiment, before constructing a three-dimensional clearance cylinder model based on the conductor tilt line and electrical clearance threshold of the power transmission system, the method of this application further includes the following steps:

[0113] The second spatial coordinates corresponding to the split conductor are determined based on the preset swing angle, and the conductor inclination is determined based on the second spatial coordinates and the suspension angle.

[0114] Step S203, which involves constructing a three-dimensional clearance cylinder model based on the conductor tilt line and electrical clearance threshold of the power transmission system, may include the following steps:

[0115] The three-dimensional gap cylinder model is constructed by using the conductor inclination line as the central axis and the electrical clearance threshold as the radius.

[0116] Specifically, the coordinates corresponding to the split traverse are as follows:

[0117] ( )

[0118] ( )

[0119]

[0120]

[0121] Since the width of the crossarm is generally much less than ten meters, a length of five meters is selected for the front and rear guide wires, based on the suspension angle. and the coordinates of the aforementioned split traverse The inclination lines of the front and rear guide lines can be obtained as follows:

[0122]

[0123]

[0124] The central axis of the cylindrical model is the aforementioned conductor inclination line, and the radius is the electrical clearance threshold under the calculated operating conditions. The three-dimensional gap cylinder model is as follows:

[0125]

[0126]

[0127] In one embodiment, obtaining the wind deflection sway angle of the insulator string in the power transmission system under various preset operating conditions in step S201 may include the following steps:

[0128] The vertical load of the transmission line is determined based on the vertical load of the power line, the vertical span, and the number of power line splits under each preset working condition. The wind load of the insulator string under each preset working condition is determined based on the number of insulators connected in the vertical wind direction, the wind load shielding reduction factor of the insulators in the wind direction, the basic wind speed under each preset working condition, the height and story height of the straight tower, the length of the insulator string, the wind load amplification factor of the insulator string icing, and the number of single insulator pieces in the insulator string. The horizontal load of the transmission line on the insulator string is determined based on the horizontal load and tension of the transmission line under each preset working condition, the rotation angle of the straight tower, and the horizontal span under each preset working condition. The wind deflection sway angle is obtained based on the string weight, vertical load, wind load of the insulator string, and horizontal load.

[0129] Specifically, the terminal performs stress analysis and disassembly on the insulator string, such as... Figure 5 As shown, the specific calculation steps are as follows:

[0130]

[0131] In the above formula, Corresponding to the wind deflection angle under various operating conditions, The string weight of the insulator string. For the vertical load on the conductor, For the wind load on the insulator string under the corresponding working conditions, This refers to the horizontal load on the insulator string from the conductor.

[0132]

[0133] In the above formula, To calculate the vertical load on the power line under the operating conditions, The number of wire splits, To calculate the vertical span for the working conditions.

[0134]

[0135] In the above formula, This refers to the number of insulator connections perpendicular to the wind direction. This is the wind load shielding reduction factor for downwind insulators. To calculate the basic wind speed under the operating conditions, The call to action for the tower For floor height, For the length of the insulator string, Insulator string icing wind load amplification factor This represents the number of insulator segments in a single string.

[0136]

[0137] In the above formula, To calculate the horizontal load on the power line under operating conditions, To calculate the horizontal span under operating conditions, To calculate the tension of the wire under operating conditions, This refers to the angle of the tower.

[0138]

[0139] In the above formula, This is the gust coefficient. This is the reduction factor for the distance between gears. This represents the average height of the power line. This is the wire shape factor. This refers to the outer diameter of the wire.

[0140]

[0141]

[0142] In the above formula, This is the wind load reduction factor for the conductor and ground wire. Average height of conductor ground wire The intensity of the current flow, This is the integral factor for the correlation between the gear range and the gear interval.

[0143]

[0144]

[0145]

[0146] To more clearly illustrate the design method for the tower head of a straight-line transmission line tower provided in this application embodiment, the following specific description uses an application embodiment to illustrate the design method for the tower head of a straight-line transmission line tower. In one embodiment, such as Figure 6 As shown, this application also provides a design method for the tower head of a straight-line transmission line tower, specifically including the following steps:

[0147] Step 1: Obtain the wind deflection angle of the insulator string:

[0148] The loads on conductors and insulator strings are calculated based on the meteorological zone alignment and tower planning conditions. The wind sway angle of the insulator strings under four working conditions—live working, switching overvoltage, power frequency voltage, and lightning overvoltage—is obtained. The electrical clearance values ​​for the above four working conditions are determined according to the regulations and specifications.

[0149] Step 2: Perform parametric modeling of the straight-line tower:

[0150] A three-dimensional spatial model of the straight tower, insulator string, and conductor is constructed using the parametric modeling method. A three-dimensional parameter module for the straight tower is then built. The swing angle of the insulator string is set to zero, and verification is performed under four different working conditions.

[0151] Step 3: Draw the 3D gap sphere and 3D gap cylinder and establish a parametric model:

[0152] Using the height of the insulator string equalizing ring and suspension clamp as the center, the electrical clearance value under the working condition is calculated and used as the radius to draw a three-dimensional gap sphere; then, according to the planned length of five meters from the outlet of the suspension clamp, the conductor inclination line is drawn as the central axis of the three-dimensional gap cylinder, and the electrical clearance is used as the radius to draw the corresponding three-dimensional model.

[0153] Step 4: Perform 3D collision detection between the gap sphere and the tower body and crossarm:

[0154] By solving the equation for the minimum distance between points and surfaces, collision detection is performed on the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight-line tower. If a collision occurs, the tower head size is adjusted and the process returns to step three; if no collision occurs, the next detection step is performed.

[0155] Step 5: Perform 3D collision detection between the gap cylinder, tower body, and crossarm.

[0156] The equations for each model are established using the geometric intersection detection method, and collision detection is performed on the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the gap cylinder and the straight tower. If a collision is found, the tower head size is adjusted and the process returns to step three; if no collision occurs, the next detection step is performed.

[0157] Step 6, Iterative detection of the swing angle:

[0158] Add the iteration step size to the swing angle of the insulator string. If the swing angle at this time is less than or equal to the wind deflection swing angle under each working condition, then jump back to step 3; otherwise, end the loop. At this time, the tower head size meets the electrical safety requirements.

[0159] The beneficial effects of the above embodiments are as follows:

[0160] 1) This application proposes a tower head design method based on gap spheres and gap cylinders in three-dimensional space. By constructing an actual three-dimensional scene of the tower, the tower head dimensions are verified according to the actual dimensions of the upper and lower inlets and crossarms of each layer. This breaks through the technical barriers of existing small sag design methods and significantly improves the electrical safety and engineering economy of straight-line tower head design. This is of great significance for controlling engineering costs and reducing the workload and construction difficulty in later stages.

[0161] 2) This application proposes a 3D collision detection algorithm combining iterative methods based on 3D parametric modeling to achieve accurate verification of gap spheres and gap cylinders. Addressing the challenge of collision detection on curved surfaces, high-precision scene analysis is performed. Through logical problem decomposition and coordinate matrix transformation, accurate calculations are achieved for spherical surfaces, cylinder surfaces, and tower components. Furthermore, solving the 3D parametric equations avoids insufficient or excessive gap margins caused by spatial deviations, significantly improving the accuracy of tower head design.

[0162] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0163] Based on the same inventive concept, this application also provides a design device for the tower head of a straight-line transmission line tower, used to implement the design method for the tower head of the aforementioned straight-line transmission line tower. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the design device for the tower head of a straight-line transmission line tower provided below can be found in the limitations of the design method for the tower head of a straight-line transmission line tower described above, and will not be repeated here.

[0164] In one exemplary embodiment, such as Figure 7This invention provides a design device for the tower head of a straight-line transmission line tower, the device comprising:

[0165] The data acquisition module 701 is used to acquire the wind deflection sway angle of the insulator string in the power transmission system under various preset working conditions, and to acquire the electrical clearance threshold corresponding to each preset working condition; the preset working conditions include live working, switching overvoltage, power frequency voltage and lightning overvoltage.

[0166] The first construction module 702 is used to construct three-dimensional spatial models corresponding to the straight towers, transmission lines and insulator strings in the power transmission system through parametric modeling methods.

[0167] The second construction module 703 is used to construct a three-dimensional gap sphere model based on the equalizing ring of the insulator string and the electrical gap threshold, with a preset swing angle as the starting point, and to construct a three-dimensional gap cylinder model based on the conductor tilt line of the power transmission system and the electrical gap threshold.

[0168] The collision detection module 704 is used to perform cyclic three-dimensional collision detection on the three-dimensional gap sphere model and the three-dimensional gap cylinder model based on the three-dimensional spatial model until a collision occurs, and obtain the updated target sway angle. If the target sway angle is greater than the wind sway angle, it is confirmed that the tower head of the straight tower meets the size requirements.

[0169] In one embodiment, the collision detection module 704 is further configured to perform a first collision detection on the three-dimensional gap sphere model and the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower based on the three-dimensional spatial model and by solving the equation for the minimum distance between points and surfaces; based on the three-dimensional spatial model, establish the equations of each model by using the geometric intersection detection method, and perform a second collision detection on the surface of the three-dimensional gap cylinder model and the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower; if at least one of the first collision detection and the second collision detection fails, adjust the size of the tower head of the straight tower, and return to execute the steps of constructing the three-dimensional gap sphere model based on the equalization ring of the insulator string and the electrical clearance threshold, and constructing the three-dimensional gap cylinder model based on the conductor inclination line of the power transmission system and the electrical clearance threshold.

[0170] In one embodiment, the collision detection module 704 is further configured to determine the minimum distance between the point and the plane by solving the equation based on the target point and the target plane; if the minimum distance between the point and the plane is less than the electrical clearance threshold, the first collision detection is confirmed to have failed; if the minimum distance between the point and the plane is greater than or equal to the electrical clearance threshold, the first collision detection is confirmed to have passed.

[0171] In one embodiment, the device may further include: a first spatial module, configured to determine the first spatial coordinates of the equalizing ring of the insulator string according to the preset swing angle, and to determine the height of the equalizing ring according to the first spatial coordinates; and a second construction module 703, configured to construct the three-dimensional gap sphere model by taking the height of the equalizing ring as the center and the electrical clearance threshold as the radius.

[0172] In one embodiment, the device may further include: a second spatial module, configured to determine the second spatial coordinates corresponding to the split conductor according to the preset swing angle, and to determine the conductor tilt line according to the second spatial coordinates and the suspension angle; and a second construction module 703, configured to construct the three-dimensional gap cylinder model by using the conductor tilt line as the central axis of the three-dimensional gap cylinder model and the electrical clearance threshold as the radius.

[0173] In one embodiment, the data acquisition module 701 is further configured to: determine the vertical load of the transmission line based on the vertical load of the power line, the vertical span, and the number of power line splits under each preset working condition; determine the wind load of the insulator string under each preset working condition based on the number of insulators connected in the vertical wind direction, the wind load shielding reduction factor of the insulators in the wind direction, the basic wind speed under each preset working condition, the height and story height of the straight tower, the length of the insulator string, the icing wind load amplification factor of the insulator string, and the number of single insulator pieces in the insulator string; determine the horizontal load of the transmission line on the insulator string based on the horizontal load and tension of the transmission line under each preset working condition, the rotation angle of the straight tower, and the horizontal span under each preset working condition; and obtain the wind deflection sway angle based on the string weight of the insulator string, the vertical load, the wind load of the insulator string, and the horizontal load.

[0174] The various modules in the design device for the tower head of the aforementioned straight-line transmission line tower can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0175] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 8As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a design method for the tower head of a straight-line transmission line tower. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0176] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0177] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0178] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0179] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0180] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0181] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0182] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0183] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A design method for the tower head of a straight-line transmission line tower, characterized in that, The method includes: The wind deflection sway angle of insulator strings in the power transmission system under various preset operating conditions is obtained, and the electrical clearance threshold corresponding to each preset operating condition is obtained; the preset operating conditions include live working, switching overvoltage, power frequency voltage and lightning overvoltage; Three-dimensional spatial models of the straight towers, transmission lines, and insulator strings in the power transmission system are constructed using parametric modeling methods. Starting from a preset swing angle, a three-dimensional gap sphere model is constructed based on the equalizing ring of the insulator string and the electrical gap threshold, and a three-dimensional gap cylinder model is constructed based on the conductor tilt line of the power transmission system and the electrical gap threshold. Based on the three-dimensional spatial model, cyclic three-dimensional collision detection is performed on the three-dimensional gap sphere model and the three-dimensional gap cylinder model until a collision occurs, and the updated target sway angle is obtained. If the target sway angle is greater than the wind sway angle, it is confirmed that the tower head of the straight tower meets the size requirements.

2. The method according to claim 1, characterized in that, The step of performing cyclic 3D collision detection on the 3D gap sphere model and the 3D gap cylinder model based on the 3D spatial model includes: Based on the three-dimensional spatial model, the first collision detection between the three-dimensional gap sphere model and the side of the tower body, the upper crossarm surface and the lower crossarm surface of the straight tower is performed by solving the equation of minimum distance between points and surfaces. Based on the three-dimensional spatial model, the equations of each model are established by the geometric intersection detection method, and the second collision detection is performed on the three-dimensional gap cylinder model surface with the side of the tower body of the straight tower, the upper crossarm surface and the lower crossarm surface; If at least one of the first and second collision detections fails, the tower head of the straight tower is sized and the process returns to the steps of constructing a three-dimensional gap sphere model based on the equalization ring of the insulator string and the electrical clearance threshold, and constructing a three-dimensional gap cylinder model based on the conductor inclination line of the power transmission system and the electrical clearance threshold.

3. The method according to claim 2, characterized in that, Based on the three-dimensional spatial model, the first collision detection of the three-dimensional gap sphere model with the side of the tower body, the upper crossarm surface, and the lower crossarm surface of the straight tower is performed by solving the equation for the minimum distance between points and surfaces. This includes: Based on the target point and the target plane, the minimum distance between the point and the plane is determined by solving the equations. If the minimum distance between the points and surfaces is less than the electrical clearance threshold, then the first collision detection is confirmed to have failed. If the minimum distance between the points and surfaces is greater than or equal to the electrical clearance threshold, then the first collision detection is confirmed to be successful.

4. The method according to claim 1, characterized in that, Before constructing the three-dimensional gap sphere model based on the equalizing ring of the insulator string and the electrical gap threshold, the method further includes: The first spatial coordinates of the equalizing ring of the insulator string are determined according to the preset swing angle, and the height of the equalizing ring is determined according to the first spatial coordinates; A three-dimensional gap sphere model is constructed based on the equalizing ring of the insulator string and the electrical gap threshold, including: The three-dimensional gap sphere model is constructed by taking the height of the equalizing ring as the center and the electrical clearance threshold as the radius.

5. The method according to claim 1, characterized in that, Before constructing the three-dimensional clearance cylinder model based on the conductor tilt line of the power transmission system and the electrical clearance threshold, the method further includes: The second spatial coordinates corresponding to the split conductor are determined according to the preset swing angle, and the conductor inclination is determined according to the second spatial coordinates and the suspension angle. The construction of a three-dimensional clearance cylinder model based on the conductor tilt line of the power transmission system and the electrical clearance threshold includes: The three-dimensional gap cylinder model is constructed by using the conductor inclination line as the central axis and the electrical clearance threshold as the radius.

6. The method according to any one of claims 1 to 5, characterized in that, The method for obtaining the wind deflection sway angle of insulator strings in the power transmission system under various preset operating conditions includes: The vertical load of the transmission line is determined based on the vertical load of the wire, the vertical span, and the number of wire splits under each preset working condition. The wind load of the insulator string under each preset working condition is determined based on the number of insulators in the vertical wind direction, the wind load shielding reduction factor of the insulators in the wind direction, the basic wind speed under each preset working condition, the height and floor height of the straight tower, the length of the insulator string, the wind load amplification factor of the insulator string icing, and the number of single insulator pieces in the insulator string. The horizontal load of the transmission line on the insulator string is determined based on the horizontal load and tension of the transmission line under each preset working condition, the rotation angle of the straight tower, and the horizontal span under each preset working condition. The wind sway angle is obtained based on the string weight of the insulator string, the vertical load, the wind load on the insulator string, and the horizontal load.

7. A design device for the tower head of a straight-line transmission line tower, characterized in that, The device includes: The data acquisition module is used to acquire the wind deflection sway angle of the insulator string in the power transmission system under various preset operating conditions, and to acquire the electrical clearance threshold corresponding to each preset operating condition; the preset operating conditions include live working, switching overvoltage, power frequency voltage and lightning overvoltage; The first construction module is used to construct three-dimensional spatial models of the straight towers, transmission lines and insulator strings in the power transmission system through parametric modeling methods. The second construction module is used to construct a three-dimensional gap sphere model based on the equalizing ring of the insulator string and the electrical gap threshold, with a preset swing angle as the starting point, and to construct a three-dimensional gap cylinder model based on the conductor tilt line of the power transmission system and the electrical gap threshold. The collision detection module is used to perform cyclical three-dimensional collision detection on the three-dimensional gap sphere model and the three-dimensional gap cylinder model based on the three-dimensional spatial model until a collision occurs, and obtain the updated target sway angle. If the target sway angle is greater than the wind sway angle, it is confirmed that the tower head of the straight tower meets the size requirements.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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