Quantitative description method, wind speed determination method and system for wind speed profiles at various locations in mountainous areas
By constructing a rigid boundary model of a mountain under complex mountain conditions to conduct flow field simulation analysis, determining the wind speed profile type and fitting the objective function, the problem of uneven wind load distribution on transmission towers was solved, and a refined description of the wind speed profile and accurate calculation of the wind load on the tower body were achieved, thus improving the safety and economy of the tower.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- STATE GRID FUJIAN ELECTRIC POWER CO LTD
- Filing Date
- 2021-03-22
- Publication Date
- 2026-06-30
AI Technical Summary
In complex mountainous conditions, the wind load distribution on power transmission towers is uneven, and existing technologies cannot accurately describe the wind speed profile, resulting in insufficient safety and economy.
Flow field simulation analysis is performed based on a pre-constructed mountain rigid body boundary model to determine the prevailing wind direction and wind speed sequence at the wind speed profile data extraction points. The wind speed profile type is determined according to the relative positional relationship between the active wind direction and the selected points in the mountain, and quantitative description is performed by fitting the wind speed profile objective function.
It enables refined classification and quantitative description of wind speed profiles at different locations in complex mountainous terrain, accurately calculates wind loads on towers, and improves the safety and economy of transmission line towers.
Smart Images
Figure CN113158426B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of disaster prevention and mitigation for power transmission lines, specifically to a method for quantitatively describing wind speed profiles at various locations in mountainous areas, a method for determining wind speed, and a system thereof. Background Technology
[0002] The wind load on transmission towers is unevenly distributed along the tower's height, primarily influenced by the wind speed profile. In complex mountainous terrain, the wind speed profile at different locations on the mountain peak, within a 100m height above the mountain surface, exhibits a pattern distinct from the traditional power-law profile due to the strong influence of the terrain. In some cases, wind speeds at lower altitudes (30-70m) may increase sharply before gradually decreasing. These complexities cause significant variations in the wind load on the tower under complex mountainous conditions compared to the profiles used in conventional design calculations, posing numerous safety hazards to the towers. Therefore, it is necessary to describe the wind speed profile at different locations on a mountainside under complex mountainous conditions to improve the accuracy of wind load measurements, the tower's safety, and the economic efficiency of tower construction. Summary of the Invention
[0003] To address the problems existing in the prior art, this invention provides a method for quantitatively describing wind speed profiles at various locations in mountainous areas, including:
[0004] Flow field simulation analysis was performed based on a pre-constructed mountain rigid body boundary model to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points.
[0005] The wind speed profile type is determined based on the relative position of the active wind direction and the selected points in the mountainous area;
[0006] The objective function of the wind speed profile corresponding to the wind speed profile type is determined based on the shape of the wind speed profile type;
[0007] Based on each wind speed profile type, the corresponding wind speed sequence and wind speed profile objective function are fitted to obtain the parameters in the wind speed profile objective function, and then the calculation formula for each wind speed profile type is determined to quantitatively describe the wind speed profile at each location in the mountainous area.
[0008] Preferably, the construction of the mountain rigid body boundary model includes:
[0009] Extract the surface elevation data of the mountainous area and generate a rigid surface boundary model in the wind field simulation analysis software;
[0010] Wind field simulation analysis software was used to perform mesh generation of the wind field in the upper layer of the rigid body boundary of the mountain.
[0011] The parameters for flow field simulation analysis are set for various wind conditions.
[0012] Preferably, the flow field simulation analysis based on a pre-constructed mountain rigid body boundary model to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points includes:
[0013] Based on the definition of wind speed extraction points at any location in the mountainous area, and using the pre-constructed mountain rigid body boundary model, the upward wind speed sequences in the x and y directions within different time spans are extracted under various defined working conditions.
[0014] Vector synthesis is performed on the upward wind speed sequences in the x and y directions within different time spans of the wind speed extraction point to obtain the dominant wind direction of the wind speed extraction point and the upward wind speed sequence in the dominant wind direction.
[0015] Preferably, before determining the wind speed profile objective function corresponding to the wind speed profile type based on the shape of the wind speed profile type, the method further includes:
[0016] The wind speed profile data are categorized according to each wind speed profile type to form a wind speed sequence corresponding to that wind speed profile type.
[0017] Preferably, the objective function for the wind speed profile includes:
[0018] The objective function of the first wind speed profile is determined based on the shape of the wind speed profile on the windward side of the mountain, the objective function of the second wind speed profile is determined based on the mountain top, and the objective function of the third wind speed profile is determined based on the leeward side of the mountain.
[0019] The wind speed profile types include: windward slope, mountain top, and leeward slope.
[0020] Preferably, the objective function for the first wind speed profile is calculated as follows:
[0021]
[0022] In the formula, H G V represents the gradient wind height, z represents the extraction point height, and V represents the wind height. G V is the wind speed at the gradient wind height. z Let z be the wind speed at a height z above the ground, and a be the coefficient to be fitted.
[0023] Preferably, the objective function for the second wind speed profile is calculated as follows:
[0024]
[0025] In the formula, z max The height at which the maximum wind speed occurs, z is the height of the extraction point, and V max denoted as , where is the maximum wind speed distributed along the height, and a, b, c, d, and e are the coefficients to be fitted.
[0026] Preferably, the objective function for the third wind speed profile is calculated as follows:
[0027]
[0028] In the formula, z max The height at which the maximum wind speed occurs, z is the height of the extraction point, and V max denoted as , where is the maximum wind speed distributed along the height, and a, b, c, d, and e are the coefficients to be fitted.
[0029] Based on the same inventive concept, this invention also provides a quantitative description system for wind speed profiles at various locations in mountainous areas, comprising:
[0030] The acquisition module is used to perform flow field simulation analysis based on a pre-built mountain rigid body boundary model, and to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points.
[0031] The wind speed profile classification module is used to determine the wind speed profile type based on the relative positional relationship between the active wind direction and the selected points in the mountainous area.
[0032] The function corresponding module is used to determine the wind speed profile objective function corresponding to the wind speed profile type based on the shape of the wind speed profile type;
[0033] The fitting module is used to fit the corresponding wind speed sequence and wind speed profile objective function according to each wind speed profile type, obtain the parameters in the wind speed profile objective function, and then determine the calculation formula for each wind speed profile type.
[0034] Based on the same inventive concept, the present invention also provides a method for determining wind speed, including:
[0035] The location of the power transmission tower, the height of the tower, the gradient wind height, and the wind speed at the gradient wind height are obtained.
[0036] The wind speed profile type is determined based on the location of the power transmission tower;
[0037] Based on the tower height, gradient wind height, and wind speed at the gradient wind height, the wind load at the tower body of the power transmission tower is calculated using the wind speed profile type calculation formula corresponding to the wind speed profile type.
[0038] The wind speed profile type calculation formula is determined using the quantitative description method of wind speed profiles at various locations in the mountainous area as described in any one of claims 1 to 8.
[0039] Based on the same inventive concept, the present invention also provides a wind speed determination system, comprising:
[0040] The wind speed acquisition module is used to acquire the location of the power transmission tower, the height of the tower, the gradient wind height, and the wind speed at the gradient wind height.
[0041] The type determination module is used to determine the wind speed profile type based on the location of the transmission tower.
[0042] The wind load calculation module is used to calculate the wind load at the tower body of the power transmission tower based on the tower height, gradient wind height and wind speed at the gradient wind height, using the wind speed profile type calculation formula corresponding to the wind speed profile type.
[0043] The wind speed profile type calculation formula is determined using the quantitative description method of wind speed profiles at various locations in the mountainous area as described in any one of claims 1 to 8.
[0044] The beneficial effects of this invention are as follows:
[0045] 1. This patent proposes a method and system for quantitatively describing wind speed profiles at various locations in mountainous areas, including: performing flow field simulation analysis based on a pre-constructed rigid boundary model of the mountain to determine the prevailing wind direction and wind speed sequence at the wind speed profile data extraction points; determining the wind speed profile type based on the relative positional relationship between the prevailing wind direction and the selected points in the mountain; determining the wind speed profile objective function corresponding to the wind speed profile type based on its shape; fitting the corresponding wind speed sequence and the wind speed profile objective function according to each wind speed profile type to obtain the parameters in the wind speed profile objective function, and then determining the calculation formula for each wind speed profile type. The purpose is to establish a system that can accurately reflect the influence of complex mountainous terrain changes on the wind speed distribution along the height.
[0046] 2. This invention provides a method and system for determining wind speed, comprising: obtaining the location of a transmission tower, the height of the tower body, the gradient wind height, and the wind speed at the gradient wind height; determining a wind speed profile type based on the location of the transmission tower; and calculating the wind load at the transmission tower body using a wind speed profile type calculation formula corresponding to the wind speed profile type, based on the height of the tower body, the gradient wind height, and the wind speed at the gradient wind height; wherein the wind speed profile type calculation formula is determined using the quantitative description method of wind speed profiles at various locations in mountainous areas as described in any one of claims 1 to 8. This invention enables accurate calculation of the wind load on the tower body, thereby improving the safety and economy of transmission towers under complex mountainous conditions.
[0047] 3. The technical means provided by this invention can realize the fine classification and quantitative description of wind speed profiles at different locations in complex mountainous areas, providing a technical means for accurately calculating the wind load on the tower body of transmission line in complex mountainous areas. This makes it possible to significantly improve the safety of transmission lines in mountainous areas while appropriately increasing construction costs. Attached Figure Description
[0048] Figure 1 Flowchart of the method for quantitatively describing wind speed profiles at various locations in mountainous areas according to the present invention;
[0049] Figure 2 Complex mountain rigid body boundary model;
[0050] Figure 3 Mesh generation of upper-layer wind field on rigid body boundaries in complex mountainous terrain;
[0051] Figure 4 Set the wind speed profile extraction points;
[0052] Figure 5a Power-law wind speed profile data on the windward side;
[0053] Figure 5b Wind speed profile data for a gourd-shaped mountaintop;
[0054] Figure 5c Leeward side funnel wall wind speed profile data;
[0055] Figure 6a Results of curve fitting for gourd-shaped wind profile;
[0056] Figure 6b Fitting results of wind profile curves for funnel-shaped walls;
[0057] Figure 7 Block diagram of the quantitative description system for wind speed profiles at various locations in mountainous areas according to the present invention;
[0058] Figure 8 Flowchart of the wind speed determination method of this invention;
[0059] Figure 9 Block diagram of the wind speed determination system of this invention. Detailed Implementation
[0060] The technical solution provided by this invention can be used to analyze the wind speed profile variation curves at different locations in complex mountainous terrain and to accurately and quantitatively calculate the wind load on the tower body at different locations on the mountain.
[0061] To better understand this invention, the following description, in conjunction with the accompanying drawings and examples, will further illustrate the invention.
[0062] Example 1:
[0063] This invention provides a method for quantitatively describing wind speed profiles at different locations in complex mountainous terrain, such as... Figure 1 As shown, it includes:
[0064] S1: Based on the pre-constructed mountain rigid body boundary model, perform flow field simulation analysis to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points;
[0065] S2 determines the wind speed profile type based on the relative position of the active wind direction and the selected points in the mountainous area;
[0066] S3 determines the wind speed profile objective function corresponding to the wind speed profile type based on the shape of the wind speed profile type;
[0067] S4 fits the corresponding wind speed sequence and wind speed profile objective function according to each wind speed profile type to obtain the parameters in the wind speed profile objective function, and then determines the calculation formula for each wind speed profile type, thus quantitatively describing the wind speed profile at various locations in the mountainous area.
[0068] The specific implementation steps and analysis methods are as follows:
[0069] S1 performs flow field simulation analysis based on a pre-built mountain rigid body boundary model to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points, including;
[0070] (1) Establish a complex mountain rigid body boundary model, divide the flow field mesh on the mountain rigid body boundary model, set the calculation parameters for flow field simulation analysis, and perform flow field simulation analysis.
[0071] (2) Set up wind speed profile data extraction points at complex mountainous locations of interest to the user, and extract horizontal wind speed data sequences U over different time spans within the height range of interest. (t，x，z) and U (t，y，z) After vector synthesis, the wind speed U in the prevailing wind direction is obtained. (t，z)
[0072] S2 determines the wind speed profile type based on the relative position of the active wind direction and the selected points in the mountainous terrain, including...
[0073] Based on the relative positional relationship between the active wind direction and the selected points in complex mountainous terrain, determine which of the three positional relationships the point belongs to: the windward slope, the leeward slope, or the summit. Then, combine all wind speed profile data belonging to the same category. (t，z) They are also categorized and stored.
[0074] S3 determines the wind speed profile objective function corresponding to the wind speed profile type based on the shape of the wind speed profile type, including:
[0075] (1) For the windward slope, the shape of the wind speed profile is very close to the shape of the power function curve. Therefore, the objective function shown in formula (1) is used to fit the wind speed profile obtained at different times at this location.
[0076]
[0077] In the formula, H G V represents the gradient wind height, z represents the extraction point height, and V represents the wind height. GV is the wind speed at the gradient wind height. z Let z be the wind speed at a height z above the ground, and α be a coefficient whose value is obtained by fitting simulation experiments.
[0078] (2) For the mountain top, the shape of the wind speed profile is very close to the shape of the gourd-shaped function curve. Therefore, the objective function shown in formula (2) is used to fit the wind speed profile obtained at different times at this location.
[0079]
[0080] In the formula, V z Let z be the wind speed at a height z above the ground. max The height at which the maximum wind speed occurs, z is the height of the extraction point, and V max denoted as , where is the maximum wind speed distributed along the height, and a, b, c, d, and e are the coefficients to be fitted.
[0081] (3) For the leeward slope, the shape of the wind speed profile is very close to the shape of the funnel wall function curve. Therefore, the objective function shown in formula (3) is used to fit the wind speed profile obtained at different times at this location.
[0082]
[0083] In the formula, z max The height at which the maximum wind speed occurs, z is the height of the extraction point, and V max denoted as , where is the maximum wind speed distributed along the height, and a, b, c, d, and e are the coefficients to be fitted.
[0084] 4. Fit the corresponding wind speed sequence and wind speed profile objective function according to each wind speed profile type to obtain the parameters in the wind speed profile objective function, and then determine the calculation formula for each wind speed profile type to quantitatively describe the wind speed profile at various locations in the mountainous area, including:
[0085] A nonlinear least squares fitting method is used to fit multiple wind speed sequences U belonging to the same class. (t，z) Based on the corresponding objective function, a unified fitting is performed to determine the undetermined coefficients in the above three types of objective functions, and finally, the mathematical expression of the wind speed profile is given.
[0086] Example 2:
[0087] Based on the quantitative description of wind speed profile in a complex mountainous terrain, this paper introduces a patent application example.
[0088]
[0089] Table 1
[0090] (1) Extract surface elevation data of complex mountainous terrain, and generate a rigid surface boundary model in wind field simulation analysis software, such as... Figure 2 As shown.
[0091] (2) In the wind field simulation analysis software, the wind field above the rigid body boundary of the complex mountain is meshed as follows: Figure 3 As shown.
[0092] (3) Set the parameters for the flow field simulation analysis according to the solution options shown in Table 1.
[0093] (4) After the wind field simulation analysis is completed, as follows Figure 4 As shown, wind speed extraction points can be defined at any location in complex mountainous terrain according to user needs, and U values can be extracted within any 10-minute time period. (10min，x，z) and U (10min，y，z) After vector synthesis, the wind speed U in the prevailing wind direction is obtained. (10min，z) .
[0094] (5) Based on the relative position of the monitoring points selected by the user and the wind direction, for example... Figure 5a The windward power-law wind speed profile data shown are categorized; for example... Figure 5b The data of the gourd-shaped wind speed profile at the mountain top shown are classified; for example... Figure 5c The wind speed profile data of the leeward funnel wall type shown are classified.
[0095] (6) For the objective function types of the windward slope, the mountain top and the leeward slope respectively, a nonlinear least squares fitting program is developed to achieve unified fitting of the wind speed profile data classified in step (5) for multiple samples at different times, and to determine the undetermined coefficients in the objective function.
[0096] (7) After fitting, Figure 6a The fitting results of the gourd-shaped wind profile curve are given. Figure 6b The fitting results of the funnel-wall type wind profile curves are given. The fitting curves of the two sets of non-power exponential wind profile functions show good fitting results. Finally, the undetermined coefficients in the objective function forms of the windward slope, the mountain top and the leeward slope were determined, forming a complex mountain wind speed profile quantitative expression function as shown in Equation (4).
[0097]
[0098] Example 3:
[0099] Based on the above method, the present invention also provides a quantitative description system for wind speed profiles at various locations in mountainous areas, such as... Figure 7 As shown, it includes:
[0100] The acquisition module is used to perform flow field simulation analysis based on a pre-built mountain rigid body boundary model, and to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points.
[0101] The wind speed profile classification module is used to determine the wind speed profile type based on the relative positional relationship between the active wind direction and the selected points in the mountainous area.
[0102] The function corresponding module is used to determine the wind speed profile objective function corresponding to the wind speed profile type based on the shape of the wind speed profile type;
[0103] The fitting module is used to fit the corresponding wind speed sequence and wind speed profile objective function according to each wind speed profile type, obtain the parameters in the wind speed profile objective function, and then determine the calculation formula for each wind speed profile type to quantitatively describe the wind speed profile at each location in the mountain.
[0104] The functions implemented by the above modules are the same as those in Examples 1 and 2, and will not be repeated here.
[0105] Example 4
[0106] This invention also provides a method for determining wind speed. By using the various wind speed profile types and calculation formulas provided by this invention, the wind load at any point on the tower body of any complex mountain transmission tower can be accurately calculated, thereby improving the safety and economy of the tower under complex mountain conditions.
[0107] like Figure 8 As shown, the wind speed determination method provided in this embodiment includes: obtaining the location of the transmission tower, the height of the tower body, the gradient wind height, and the wind speed at the gradient wind height; determining the wind speed profile type based on the location of the transmission tower; and calculating the wind load at the transmission tower body using the wind speed profile type calculation formula corresponding to the wind speed profile type based on the height of the tower body, the gradient wind height, and the wind speed at the gradient wind height. The wind speed profile type calculation formula is determined using the quantitative description method of wind speed profiles at various locations in mountainous terrain as described in any one of claims 1 to 8. Using this invention, the wind load on the tower body can be accurately calculated, thereby improving the safety and economy of the transmission tower under complex mountainous conditions.
[0108] The specific design method for calculating wind speed profile types is as shown in the above embodiments, and will not be repeated here.
[0109] Example 5
[0110] To implement the method of Example 4, the present invention also provides a wind speed determination system, such as... Figure 9 As shown, it includes:
[0111] The wind speed acquisition module is used to acquire the location of the power transmission tower, the height of the tower, the gradient wind height, and the wind speed at the gradient wind height.
[0112] The type determination module is used to determine the wind speed profile type based on the location of the transmission tower.
[0113] The wind load calculation module is used to calculate the wind load at the tower body of the power transmission tower based on the tower height, gradient wind height and wind speed at the gradient wind height, using the wind speed profile type calculation formula corresponding to the wind speed profile type.
[0114] The wind speed profile type calculation formula is determined using the quantitative description method of wind speed profiles at various locations in the mountainous area as described in any one of claims 1 to 8.
[0115] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0116] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0117] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0118] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0119] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0120] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.
Claims
1. A method for quantitatively describing wind speed profiles at various locations in mountainous areas, characterized in that, include: Flow field simulation analysis was performed based on a pre-constructed mountain rigid body boundary model to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points. The wind speed profile type is determined based on the relative position of the prevailing wind direction and the selected points in the mountainous area; The objective function of the wind speed profile corresponding to the wind speed profile type is determined based on the shape of the wind speed profile type; According to each wind speed profile type, the corresponding wind speed sequence and wind speed profile objective function are fitted to obtain the parameters in the wind speed profile objective function, and then the calculation formula for each wind speed profile type is determined to quantitatively describe the wind speed profile at each location in the mountain. The objective function for the wind speed profile includes: The objective function of the first wind speed profile is determined based on the shape of the wind speed profile on the windward side of the mountain, the objective function of the second wind speed profile is determined based on the mountain top, and the objective function of the third wind speed profile is determined based on the leeward side of the mountain. The wind speed profile types include: windward slope, mountain top, and leeward slope; The objective function for the first wind speed profile is calculated as follows: (1) In the formula, For gradient wind height, For the extraction point height, The wind speed at the gradient wind height. Height above ground z Wind speed, a The coefficients are to be fitted. The objective function for the second wind speed profile is calculated as follows: (2) In the formula, The altitude at which the maximum wind speed occurs. For the extraction point height, Height above ground z Wind speed, The maximum wind speed distributed along the altitude. a, b, c, d, e The coefficients are to be fitted. The objective function for the third wind speed profile is calculated as follows: (3) In the formula, The altitude at which the maximum wind speed occurs. For the extraction point height, Height above ground z Wind speed, The maximum wind speed distributed along the altitude. a, b, c, d, e The coefficients are to be fitted.
2. The method as described in claim 1, characterized in that, The construction of the mountain rigid body boundary model includes: Extract the surface elevation data of the mountainous area and generate a rigid surface boundary model in the wind field simulation analysis software; Wind field simulation analysis software was used to perform mesh generation of the wind field in the upper layer of the rigid body boundary of the mountain. The parameters for flow field simulation analysis are set for various wind conditions.
3. The method as described in claim 1, characterized in that, The flow field simulation analysis based on the pre-constructed mountain rigid body boundary model determines the prevailing wind direction and wind speed sequence at the wind speed profile data extraction points, including: Based on the definition of wind speed extraction points at any location in the mountainous area, and using the pre-constructed mountain rigid body boundary model, the upward wind speed sequences in the x and y directions within different time spans are extracted under various defined working conditions. Vector synthesis is performed on the upward wind speed sequences in the x and y directions within different time spans of the wind speed extraction point to obtain the dominant wind direction of the wind speed extraction point and the upward wind speed sequence in the dominant wind direction.
4. The method as described in claim 1, characterized in that, Before determining the wind speed profile objective function corresponding to the wind speed profile type based on its shape, the method further includes: The wind speed profile data are categorized according to each wind speed profile type to form a wind speed sequence corresponding to that wind speed profile type.
5. A quantitative description system for wind speed profiles at various locations in mountainous areas, characterized in that, include: The acquisition module is used to perform flow field simulation analysis based on a pre-built mountain rigid body boundary model, and to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points. The wind speed profile classification module is used to determine the wind speed profile type based on the relative position of the prevailing wind direction and the selected points in the mountainous area. The function corresponding module is used to determine the wind speed profile objective function corresponding to the wind speed profile type based on the shape of the wind speed profile type; The fitting module is used to fit the corresponding wind speed sequence and wind speed profile objective function according to each wind speed profile type, obtain the parameters in the wind speed profile objective function, and then determine the calculation formula for each wind speed profile type to quantitatively describe the wind speed profile at each location in the mountain. The objective function for the wind speed profile includes: The objective function of the first wind speed profile is determined based on the shape of the wind speed profile on the windward side of the mountain, the objective function of the second wind speed profile is determined based on the mountain top, and the objective function of the third wind speed profile is determined based on the leeward side of the mountain. The wind speed profile types include: windward slope, mountain top, and leeward slope; The objective function for the first wind speed profile is calculated as follows: (1) In the formula, For gradient wind height, For the extraction point height, The wind speed at the gradient wind height. Height above ground z Wind speed, a The coefficients are to be fitted. The objective function for the second wind speed profile is calculated as follows: (2) In the formula, The altitude at which the maximum wind speed occurs. For the extraction point height, Height above ground z Wind speed, The maximum wind speed distributed along the altitude. a, b, c, d, e The coefficients are to be fitted. The objective function for the third wind speed profile is calculated as follows: (3) In the formula, The altitude at which the maximum wind speed occurs. For the extraction point height, Height above ground z Wind speed, The maximum wind speed distributed along the altitude. a, b, c, d, e The coefficients are to be fitted.
6. A method for determining wind speed, characterized in that, include: The location of the power transmission tower, the height of the tower, the gradient wind height, and the wind speed at the gradient wind height are obtained. The wind speed profile type is determined based on the location of the power transmission tower; Based on the tower height, gradient wind height, and wind speed at the gradient wind height, the wind load at the tower body of the power transmission tower is calculated using the wind speed profile type calculation formula corresponding to the wind speed profile type. The wind speed profile type calculation formula is determined using the quantitative description method of wind speed profiles at various locations in the mountainous area as described in any one of claims 1 to 4.
7. A wind speed determination system, characterized in that, include: The wind speed acquisition module is used to acquire the location of the power transmission tower, the height of the tower, the gradient wind height, and the wind speed at the gradient wind height. The type determination module is used to determine the wind speed profile type based on the location of the transmission tower. The wind load calculation module is used to calculate the wind load at the tower body of the power transmission tower based on the tower height, gradient wind height and wind speed at the gradient wind height, using the wind speed profile type calculation formula corresponding to the wind speed profile type. The wind speed profile type calculation formula is determined using the quantitative description method of wind speed profiles at various locations in the mountainous area as described in any one of claims 1 to 4.