Analysis Methods and Systems for the Effect of Topographic Slope on Wind Speed ​​Acceleration under Prevailing Wind

Abstract

This invention provides a method and system for analyzing the relationship between terrain slope and wind speed acceleration effect under prevailing wind direction. The method includes: determining the terrain slope under prevailing wind direction based on hillside terrain parameters within the range of the prevailing wind direction angle; obtaining the wind speed acceleration ratio corresponding to the hillside terrain based on fluid simulation analysis; and constructing a relationship curve between the terrain slope and the wind speed acceleration ratio based on the terrain slope and the wind speed acceleration ratio. The method provided by this invention constructs a relationship curve between the terrain slope and the wind speed acceleration ratio under prevailing wind direction using the terrain slope determined by hillside terrain parameters and the wind speed acceleration ratio obtained from simulation analysis. This provides data support for analyzing the intrinsic relationship of wind speed acceleration effect caused by hillside slope and provides a technical path for directly obtaining the wind speed acceleration ratio through hillside slope.

Description

Technical Field

[0001] This invention relates to the technical field of disaster prevention and mitigation for power transmission lines, specifically to an analysis method and system for the effect of terrain slope and wind speed acceleration under the prevailing wind direction. Background Technology

[0002] In complex terrain surrounding mountainous areas, the slope of the windward slope has a significant impact on the acceleration effect of wind speed, especially in the prevailing wind direction where the terrain slope is steep. This results in a large initial energy input, and the wind speed, accelerated by the terrain, is more likely to damage transmission lines. While geographic information systems (GIS) provide automatic slope calculation functions, they do not consider wind direction, and the benchmark for slope calculation is unclear. It largely relies on the average slope of a certain area, making it impossible to directly determine the wind speed acceleration ratio at the tower location of transmission lines in mountainous areas. Summary of the Invention

[0003] To address the problem that existing slope calculation techniques lack a clear benchmark and, more broadly, rely on the average slope within a certain area, making it impossible to directly determine the wind speed acceleration ratio at the tower location of a transmission line in a mountainous region, this invention proposes an analytical method for the relationship between terrain slope and wind speed acceleration under the prevailing wind direction, including:

[0004] The slope of the terrain under the prevailing wind direction is determined based on the topographic parameters of the hillside within the range of the dominant direction angle.

[0005] Based on fluid simulation analysis, the wind speed acceleration ratio corresponding to the hillside terrain was obtained;

[0006] Based on the terrain slope under the prevailing wind direction and the wind speed acceleration ratio, a curve showing the relationship between terrain slope under the prevailing wind direction and wind speed acceleration ratio is constructed.

[0007] Preferably, determining the terrain slope under the prevailing wind direction based on the hillside terrain parameters within the range of the dominant direction angle includes:

[0008] The spherical projection distance between any two points is calculated based on the hillside topographic parameters and the spherical arc length calculation function between any two points.

[0009] The slope of the terrain under the prevailing wind direction is determined based on the hillside topographic parameters and the spherical projection distance between any two points.

[0010] Preferably, obtaining the hillside topographic parameters within the dominant direction angle range includes:

[0011] Obtain the slope apex near the top of the slope within the range of the dominant direction angle, and record the latitude and longitude coordinates of the slope apex;

[0012] Obtain the toe point of the hillside near the toe point within the range of the dominant direction angle, and record the latitude and longitude coordinates of the toe point;

[0013] Based on the nearest point search function, search for the latitude and longitude coordinates and elevation data of the nearest adjacent slope peak on the hillside within the range of the dominant direction angle;

[0014] Based on the nearest point search function, search for the latitude and longitude coordinates and elevation data of the nearest adjacent toe point on the hillside within the range of the dominant direction angle.

[0015] Preferably, the spherical arc length between any two points is calculated using the following formula:

[0016] arclen i-j = distance(LAT) i ,LON i ,Lat j Lon j ,R earth );

[0017] Among them, arclen i-j LAT is the spherical projection distance from the i-th slope vertex to the j-th slope toe; i Let LON be the longitude coordinates of the i-th slope vertex; i Let Lat be the latitude coordinate of the i-th slope vertex; j Lon represents the longitude coordinates of the j-th slope toe point. j R represents the latitude coordinates of the j-th slope toe point; earth This is the average radius of the Earth.

[0018] Preferably, determining the terrain slope under the prevailing wind direction based on the hillside topographic parameters and the spherical projection distance between any two points includes:

[0019] The slope between any two points is calculated based on the spherical projection distance between them, the elevation data of the adjacent slope apex and the elevation data of the adjacent slope toe, combined with the slope calculation formula from the slope apex to the slope toe.

[0020] The maximum value of the slope between any two points is selected as the terrain slope under the prevailing wind direction.

[0021] Preferably, the slope from the top of the slope to the bottom of the slope is calculated using the following formula:

[0022]

[0023] Among them, arclen i-j ALT is the spherical projection distance from the i-th slope vertex to the j-th slope toe. i This provides the elevation data of the adjacent vertices of the i-th slope vertex; Altj The slope provides elevation data for adjacent slope toe points of the j-th slope toe point. i-j Let be the slope from the i-th slope vertex to the j-th slope toe.

[0024] Preferably, the terrain slope under the prevailing wind direction is calculated using the following formula:

[0025] slope = max(slope) i-j );

[0026] Where slope is the terrain slope under the prevailing wind direction; slope i-j Let be the slope from the i-th slope vertex to the j-th slope toe.

[0027] Preferably, the wind speed acceleration ratio is calculated using the following formula:

[0028]

[0029] Where wsr is the wind speed acceleration ratio; U inlet U represents the inflow wind speed on the hillside. hill This refers to the wind speed at the top of the hillside.

[0030] Based on the same inventive concept, this invention also provides an analysis system for the effect of terrain slope and wind speed acceleration under the prevailing wind direction, characterized in that it includes:

[0031] The acquisition module is used to acquire hillside topographic parameters within the range of the dominant direction angle;

[0032] The terrain slope calculation module is used to determine the terrain slope under the prevailing wind direction based on the mountain slope terrain parameters within the range of the dominant direction angle.

[0033] The wind speed acceleration ratio calculation module is used to obtain the wind speed acceleration ratio corresponding to the terrain slope under the prevailing wind direction based on fluid simulation analysis.

[0034] The relationship curve construction module is used to construct a relationship curve between the terrain slope and the wind speed acceleration ratio under the prevailing wind direction based on the terrain slope under the prevailing wind direction and the wind speed acceleration ratio.

[0035] Preferably, the terrain slope calculation module includes:

[0036] The spherical projection distance calculation submodule is used to calculate the spherical projection distance between any two points based on the hillside topography parameters and the spherical arc length calculation function between any two points.

[0037] The prevailing wind slope calculation submodule is used to determine the prevailing wind slope based on the hillside topographic parameters and the spherical projection distance between any two points.

[0038] Preferably, the acquisition module includes:

[0039] The first acquisition submodule is used to acquire the latitude and longitude coordinates of the slope apex and slope toe.

[0040] The second acquisition submodule is used to acquire the latitude and longitude coordinates and elevation data of the adjacent slope peak that is closest to the slope peak, and the latitude and longitude coordinates and elevation data of the adjacent slope foot that is closest to the slope foot.

[0041] The third acquisition submodule is used to acquire the inflow wind speed on the hillside and the wind speed at the top of the hillside.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] This invention provides a method and system for analyzing the relationship between terrain slope and wind speed acceleration effect under prevailing wind direction. The method includes: determining the terrain slope under prevailing wind direction based on hillside terrain parameters within the range of the prevailing wind direction angle; obtaining the wind speed acceleration ratio corresponding to the hillside terrain based on fluid simulation analysis; and constructing a relationship curve between the terrain slope and the wind speed acceleration ratio based on the terrain slope and the wind speed acceleration ratio. The method provided by this invention constructs a relationship curve between the terrain slope and the wind speed acceleration ratio under prevailing wind direction using the terrain slope determined by hillside terrain parameters and the wind speed acceleration ratio obtained from simulation analysis. This provides data support for analyzing the intrinsic relationship of wind speed acceleration effect caused by hillside slope and provides a technical path for directly obtaining the wind speed acceleration ratio through hillside slope. Attached Figure Description

[0044] Figure 1 This is a flowchart illustrating the analytical method for the effect of terrain slope and wind speed acceleration under the prevailing wind direction, according to the present invention.

[0045] Figure 2 This is a schematic diagram of the prevailing wind direction, the corresponding hillside, the top of the hillside, and the bottom of the hillside, which is the dominant wind direction of the present invention.

[0046] Figure 3 This is a graph showing the relationship between terrain slope and wind speed acceleration ratio under the prevailing wind direction, as presented in this invention. Detailed Implementation

[0047] This invention discloses an analysis method and system for the relationship between terrain slope and wind speed acceleration effect under prevailing wind direction. By using the terrain slope under prevailing wind direction determined by mountain slope parameters and the wind speed acceleration ratio obtained from simulation analysis, a relationship curve between terrain slope and wind speed acceleration ratio under prevailing wind direction is constructed. This provides data support for analyzing the intrinsic relationship of wind speed acceleration effect caused by mountain slope and provides a technical path for directly obtaining the wind speed acceleration ratio through mountain slope.

[0048] Example 1:

[0049] An analytical method for the effect of terrain slope and wind speed acceleration under prevailing wind direction, such as... Figure 1 As shown, it includes:

[0050] S1: Determine the slope of the terrain under the prevailing wind direction based on the topographic parameters of the hillside within the range of the dominant direction angle;

[0051] S2: Based on fluid simulation analysis, the wind speed acceleration ratio corresponding to the hillside terrain is obtained;

[0052] S3: Based on the terrain slope under the prevailing wind direction and the wind speed acceleration ratio, construct a curve showing the relationship between terrain slope under the prevailing wind direction and wind speed acceleration ratio.

[0053] The steps of this invention are described in detail below:

[0054] Prior to S1, the hillside topographic parameters within the dominant direction range were obtained, such as... Figure 2 As shown, it includes:

[0055] (1) Obtain the top of the hillside near the top of the hillside within the range of the dominant direction angle, and record the latitude and longitude coordinates of the top of the hillside;

[0056] (2) Obtain the toe point of the hillside near the toe point within the range of the dominant direction angle, and record the latitude and longitude coordinates of the toe point;

[0057] (3) Based on the nearest point search function, search for the latitude and longitude coordinates and elevation data of the nearest adjacent slope peak within the range of the dominant direction angle;

[0058] (4) Based on the nearest point search function, search for the latitude and longitude coordinates and elevation data of the nearest adjacent toe point on the hillside within the range of the dominant direction angle.

[0059] S1, which determines the terrain slope under the prevailing wind direction based on the hillside terrain parameters within the range of the dominant direction angle, specifically includes:

[0060] (1) The spherical projection distance between any two points is calculated based on the hillside topographic parameters and the spherical arc length calculation function between any two points, specifically including:

[0061] The spherical projection distance between any two points can be calculated using the latitude and longitude coordinates of the slope apex and slope toe, combined with the spherical arc length calculation function between any two points.

[0062] The function for calculating the arc length of a sphere between any two points is as follows:

[0063] arclen i-j = distance(LAT) i ,LON i,Lat j Lon j ,R earth );

[0064] Among them, arclen i-j LAT is the spherical projection distance from the i-th slope vertex to the j-th slope toe; i Let LON be the longitude coordinates of the i-th slope vertex; i Let Lat be the latitude coordinate of the i-th slope vertex; j Lon represents the longitude coordinates of the j-th slope toe point. j R represents the latitude coordinates of the j-th slope toe point; earth This is the average radius of the Earth.

[0065] (2) The determination of the terrain slope under the prevailing wind direction based on the hillside topographic parameters and the spherical projection distance between any two points specifically includes:

[0066] The slope between any two points is calculated using the spherical projection distance between any two points, the elevation data of adjacent slope apex and adjacent slope toe, and the slope calculation formula from slope apex to slope toe.

[0067] Choose the maximum value of the slope between any two points as the terrain slope under the prevailing wind direction.

[0068] The slope from the top to the bottom of the slope is calculated using the following formula:

[0069]

[0070] Among them, arclen i-j ALT is the spherical projection distance from the i-th slope vertex to the j-th slope toe. i This provides the elevation data of the adjacent vertices of the i-th slope vertex; Alt j The slope provides elevation data for adjacent slope toe points of the j-th slope toe point. i-j Let be the slope from the i-th slope vertex to the j-th slope toe.

[0071] The slope of the terrain under the prevailing wind direction is calculated using the following formula:

[0072] slope = max(slope) i-j );

[0073] Where slope is the terrain slope under the prevailing wind direction; slope i-j Let be the slope from the i-th slope vertex to the j-th slope toe.

[0074] Based on fluid simulation analysis in S2, the wind speed acceleration ratio corresponding to the hillside terrain is obtained, including:

[0075] The wind speed acceleration ratio corresponding to the hillside terrain is calculated using the following formula:

[0076]

[0077] Where wsr is the wind speed acceleration ratio; U inlet U represents the inflow wind speed on the hillside. hill This refers to the wind speed at the top of the hillside.

[0078] S3 constructs a curve relating the terrain slope to the prevailing wind direction and the wind speed acceleration ratio based on the terrain slope under the prevailing wind direction and the wind speed acceleration ratio, including:

[0079] We selected mountain slopes with different gradients and performed slope and wind speed acceleration ratio calculations to construct a curve representing the wind speed acceleration ratio of the windward slope that depends on the slope. i ,wsr i},like Figure 3 As shown, the wind speed acceleration ratio corresponding to any slope can then be obtained within the range of this curve.

[0080] Example 2:

[0081] This paper introduces a patent application example based on the terrain slope calculation under the prevailing wind direction in a certain mountainous area.

[0082] (1) Delineation of the prevailing wind direction angle range:

[0083] Based on meteorological data, the prevailing wind direction in this area was determined to be 270°, and the range of 255° to 285° was defined as the prevailing wind direction range for this area.

[0084] (2) Selection of start and end points for slope calculation:

[0085] Within the range of 255° to 285°, select five apex points near the top of the slope, record their latitude and longitude coordinates, and store them in a vector. In the middle section, select five points near the foot of the slope in the hillside terrain, record the latitude and longitude coordinates of these five points, and store them in a vector. middle.

[0086] (3) Search for the nearest points at the top and bottom of the slope:

[0087] Based on the nearest point search function dsearchn, in a hillside topographic map, search for points on the hillside within the dominant direction angle range that are closest to the nearest point. Find the nearest adjacent slope vertex and extract its latitude, longitude, and elevation data.

[0088] Based on the nearest point search function dsearchn, in a hillside topographic map, search for points on the hillside within the dominant direction angle range that are closest to the nearest point. Find the nearest adjacent slope toe point and extract its latitude, longitude, and elevation data.

[0089] (4) Calculation of the spherical projection distance between two points at the top and bottom of the slope:

[0090] Based on the spherical arc length calculation function distance between any two points, the spherical projection distance from the first slope vertex to the first slope toe is calculated using the following formula:

[0091] arclen i-j = distance(LAT) i ,LON i ,Lat j Lon j ,R earth )

[0092] Among them, arclen i-j LAT is the spherical projection distance from the i-th slope vertex to the j-th slope toe; i Let LON be the longitude coordinates of the i-th slope vertex; i Let Lat be the latitude coordinate of the i-th slope vertex; j Lon represents the longitude coordinates of the j-th slope toe point. j R represents the latitude coordinates of the j-th slope toe point; earth The average radius of the Earth is taken as 6,371,393 m.

[0093] We can obtain:

[0094] arclen 1-1 =distance(LAT1,LON1,Lat1,Lon1,R earth ) = 322.737

[0095] arclen 2-2 =distance(LAT2,LON2,Lat2,Lon2,R earth ) = 295.7

[0096] arclen 3-3 =distance(LAT3,LON3,Lat3,Lon3,R earth ) = 285.9324

[0097] arclen 4-4 =distance(LAT4,LON4,Lat4,Lon4,R earth ) = 277.8676

[0098] arclen 5-5 =distance(LAT5,LON5,Lat5,Lon5,R earth ) = 272.1064

[0099] (5) Calculation of slope between the top and bottom of the slope:

[0100] The slope from the first slope peak to the first slope toe is calculated using the following formula. 1-1 :

[0101]

[0102] Among them, arclen i-j ALT is the spherical projection distance from the i-th slope vertex to the j-th slope toe. i This provides the elevation data of the adjacent vertices of the i-th slope vertex; Alt j The slope provides elevation data for adjacent slope toe points of the j-th slope toe point. i-j Let be the slope from the i-th slope vertex to the j-th slope toe.

[0103] The slopes of other points are calculated in the same manner as shown below:

[0104]

[0105] (6) Calculation of terrain slope under prevailing wind direction:

[0106] The terrain slope under the prevailing wind direction is calculated using the following formula.

[0107] slope = max(slope) 1-1 slope 2-2 slope 3-3 slope 4-4 slope 5-5 ) = 0.5404

[0108] (7) Calculation of wind speed acceleration ratio on the windward slope:

[0109] When performing fluid simulation calculations, the inflow velocity U is set. inlet The wind speed at the top of the hillside is 10 m / s, U hill The wind speed acceleration ratio for this windward slope is 15.34 m / s. Therefore, the acceleration ratio for this windward slope is calculated using the following formula:

[0110]

[0111] (8) Establish the relationship curve between windward slope and wind speed acceleration ratio:

[0112] Ten windward slopes with different gradients in mountainous areas were selected for slope and wind speed acceleration ratio calculations. A curve showing the wind speed acceleration ratio of the windward slope depending on the slope was constructed, such as... Figure 3 As shown, the wind speed acceleration ratio corresponding to any slope can then be obtained within the slope range of the curve.

[0113] Example 3

[0114] Based on the same inventive concept, the present invention also provides a system for calculating terrain slope under the prevailing wind direction, comprising:

[0115] The acquisition module is used to acquire hillside topographic parameters within the range of the dominant direction angle;

[0116] The terrain slope calculation module is used to determine the terrain slope under the prevailing wind direction based on the mountain slope terrain parameters within the range of the dominant direction angle.

[0117] The wind speed acceleration ratio calculation module is used to obtain the wind speed acceleration ratio corresponding to the terrain slope under the prevailing wind direction based on fluid simulation analysis.

[0118] The relationship curve construction module is used to construct a relationship curve between the terrain slope and the wind speed acceleration ratio under the prevailing wind direction based on the terrain slope under the prevailing wind direction and the wind speed acceleration ratio.

[0119] The acquisition module includes:

[0120] The first acquisition submodule is used to acquire the latitude and longitude coordinates of the slope apex and slope toe.

[0121] The second acquisition submodule is used to acquire the latitude and longitude coordinates and elevation data of the adjacent slope peak that is closest to the slope peak, and the latitude and longitude coordinates and elevation data of the adjacent slope foot that is closest to the slope foot.

[0122] The third acquisition submodule is used to acquire the inflow wind speed on the hillside and the wind speed at the top of the hillside.

[0123] The terrain slope calculation module includes:

[0124] The spherical projection distance calculation submodule is used to calculate the spherical projection distance between any two points based on the hillside topography parameters and the spherical arc length calculation function between any two points.

[0125] The prevailing wind slope calculation submodule is used to determine the prevailing wind slope based on the hillside topographic parameters and the spherical projection distance between any two points.

[0126] The topographic slope calculation module under the prevailing wind direction includes:

[0127] The terrain slope calculation submodule under the prevailing wind direction is used to calculate the slope between any two points based on the spherical projection distance between the two points, the elevation data of the adjacent slope apex and the elevation data of the adjacent slope toe, combined with the slope calculation formula from the slope apex to the slope toe.

[0128] The prevailing wind slope comparison submodule is used to select the maximum value of the slope between any two points as the prevailing wind slope.

[0129] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention 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.

[0130] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0131] 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.

[0132] 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.

[0133] 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 of analyzing the effect of wind speed acceleration by topographic slope in the direction of prevailing winds, characterized by, include: The slope of the terrain under the prevailing wind direction is determined based on the topographic parameters of the hillside within the range of the dominant direction angle. Based on fluid simulation analysis, the wind speed acceleration ratio corresponding to the hillside terrain was obtained; The wind speed acceleration ratio is calculated using the following formula: ； in, The wind speed acceleration ratio; The inflow wind speed on the hillside; Wind speed at the top of the hillside; Based on the terrain slope under the prevailing wind and the wind speed acceleration ratio, a curve showing the relationship between terrain slope under the prevailing wind and the wind speed acceleration ratio is constructed. The determination of the terrain slope under the prevailing wind direction based on the hillside terrain parameters within the range of the dominant direction angle includes: The spherical projection distance between any two points is calculated based on the hillside topographic parameters and the spherical arc length calculation function between any two points. The slope of the terrain downwind is determined based on the hillside topographic parameters and the spherical projection distance between any two points. The determination of the terrain slope under the prevailing wind direction based on the hillside topographic parameters and the spherical projection distance between any two points includes: The slope between any two points is calculated based on the spherical projection distance between them, the elevation data of adjacent slope apex and adjacent slope toe, and the slope calculation formula from slope apex to slope toe. Select the maximum value of the slope between any two points as the terrain slope downwind of the prevailing wind. The slope from the top of the slope to the bottom of the slope is calculated using the following formula: ； in, For the first i From the top of the slope to the first j The spherical projection distance of each slope foot point; The elevation data are the adjacent vertices of the i-th slope vertex. The elevation data of the adjacent toe points of the j-th toe point are provided. Let be the slope from the i-th slope vertex to the j-th slope toe.

2. The method according to claim 1, characterized in that, The acquisition of hillside topographic parameters within the dominant direction angle range includes: Obtain the slope apex near the top of the slope within the range of the dominant direction angle, and record the latitude and longitude coordinates of the slope apex; Obtain the toe point of the hillside near the toe point within the range of the dominant direction angle, and record the latitude and longitude coordinates of the toe point; Based on the nearest point search function, search for the latitude and longitude coordinates and elevation data of the nearest adjacent slope peak on the hillside within the range of the dominant direction angle; Based on the nearest point search function, search for the latitude and longitude coordinates and elevation data of the nearest adjacent toe point on the hillside within the range of the dominant direction angle.

3. The method according to claim 1, characterized in that, The function for calculating the spherical arc length between any two points is as follows: ； in, For the first i From the top of the slope to the first j The spherical projection distance of each slope foot point; For the first i The longitude coordinates of the apex of the slope; For the first i The latitude coordinates of the apex of the slope; For the first j The longitude coordinates of the slope toe point; For the first j The latitude coordinates of the foot of the slope; is the average radius of the Earth; distance is the function for calculating the arc length of the sphere between any two points.

4. The method according to claim 1, characterized in that, The terrain slope under the prevailing wind direction is calculated using the following formula: ； in, The slope of the terrain is determined by the prevailing wind direction; From the i-th slope vertex to the i-th slope vertex j The slope of the foot of the slope.

5. An analysis system for the effect of terrain slope and wind speed acceleration under prevailing wind direction, applicable to the method described in claim 1, characterized in that, include: The acquisition module is used to acquire hillside topographic parameters within the range of the dominant direction angle; The terrain slope calculation module is used to determine the terrain slope under the prevailing wind direction based on the mountain slope terrain parameters within the range of the dominant direction angle. The wind speed acceleration ratio calculation module is used to obtain the wind speed acceleration ratio corresponding to the terrain slope under the prevailing wind direction based on fluid simulation analysis. The relationship curve construction module is used to construct a relationship curve between the terrain slope and the wind speed acceleration ratio under the prevailing wind direction based on the terrain slope under the prevailing wind direction and the wind speed acceleration ratio. The terrain slope calculation module includes: The spherical projection distance calculation submodule is used to calculate the spherical projection distance between any two points based on the hillside topography parameters and the spherical arc length calculation function between any two points. The prevailing wind slope calculation submodule is used to determine the prevailing wind slope based on the hillside topographic parameters and the spherical projection distance between any two points.

6. The system according to claim 5, characterized in that, The acquisition module includes: The first acquisition submodule is used to acquire the latitude and longitude coordinates of the slope apex and slope toe. The second acquisition submodule is used to acquire the latitude and longitude coordinates and elevation data of the adjacent slope peak that is closest to the slope peak, and the latitude and longitude coordinates and elevation data of the adjacent slope foot that is closest to the slope foot. The third acquisition submodule is used to acquire the inflow wind speed on the hillside and the wind speed at the top of the hillside.

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