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Quantitative description method and system for wind speed profile of each position of mountainous region and wind speed determination method and system

A quantitative description and wind speed technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as hidden safety hazards of iron towers, and achieve the effect of improving safety and economy

Pending Publication Date: 2021-07-23
STATE GRID FUJIAN ELECTRIC POWER CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The occurrence of these complex situations has greatly changed the wind load of the tower body under complex mountainous conditions and the section used in conventional design calculations, and has also brought many hidden dangers to the safety of the iron tower.

Method used

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  • Quantitative description method and system for wind speed profile of each position of mountainous region and wind speed determination method and system
  • Quantitative description method and system for wind speed profile of each position of mountainous region and wind speed determination method and system
  • Quantitative description method and system for wind speed profile of each position of mountainous region and wind speed determination method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The present invention provides a method for quantitatively describing wind speed profiles at different positions in complex mountains, such as figure 1 shown, including:

[0064] S1: Perform flow field simulation analysis based on the pre-built mountain rigid body boundary model, and determine the dominant wind direction and wind speed sequence at the extraction point of the wind speed profile data;

[0065] S2 Determine the type of wind speed profile according to the relative position relationship between the active wind direction and the selected point in the mountain;

[0066] S3 determines the wind speed profile objective function corresponding to the wind speed profile type according to the shape of the wind speed profile type;

[0067] S4 Fit the corresponding wind speed sequence and the 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 calcul...

Embodiment 2

[0087] Based on the quantitative description of the wind speed profile of complex mountainous terrain in a mountainous area, the application of patent examples is introduced.

[0088]

[0089] Table 1

[0090] (1) Extract the surface elevation data of complex mountains, and generate a rigid body surface boundary model in the wind field simulation analysis software such as figure 2 shown.

[0091] (2) In the wind field simulation analysis software, the wind field on the upper layer of the complex mountain rigid body boundary is meshed as follows: image 3 shown.

[0092] (3) According to the solution options shown in Table 1, set the parameters of the flow field simulation analysis.

[0093] (4) After the wind field simulation analysis is completed, if Figure 4 As shown, according to the user's needs, define the wind speed extraction point at any position in the complex mountainous area, and extract the U within any 10min period (10min，x，z) and U (10min，y，z) , after ...

Embodiment 3

[0099] Based on realizing the above method, the present invention also provides a quantitative description system for wind speed profiles at various positions in mountainous areas, such as Figure 7 shown, including:

[0100] The acquisition module is used to perform flow field simulation analysis based on the pre-built mountain rigid body boundary model, and determine the dominant wind direction and wind speed sequence of the wind speed profile data extraction point;

[0101] The partial velocity profile classification module is used to determine the wind speed profile type according to the relative positional relationship between the active wind direction and the selected point in the mountain;

[0102] A function correspondence module, configured to determine a wind speed profile objective function corresponding to the wind speed profile type according to the shape of the wind speed profile type;

[0103] The fitting module is used to fit the corresponding wind speed seque...

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Abstract

The invention provides a quantitative description method and system for a wind speed profile of each position of a mountainous region, and a wind speed determination method and system, and the method comprises the steps: carrying out flow field simulation analysis based on a mountainous region rigid body boundary model, determining wind speed profile data, and extracting a point location prevailing wind direction and a wind speed sequence; determining a wind speed profile type and a corresponding wind speed profile objective function according to the relative position relationship between the active wind direction and the mountain selection point; fitting the corresponding wind speed sequence and the wind speed profile objective function according to each wind speed profile type to obtain parameters in the wind speed profile objective function, further determining a calculation formula of each wind speed profile type, and then calculating a wind load at any position of the tower body of the power transmission tower by using the calculation formula of the wind speed profile type corresponding to the wind speed profile type; the method and system aim to accurately reflect the influence of complex mountain land surface topography change on wind speed distribution along the height, accurately calculate the wind load of a tower body and further improve the safety and economical efficiency of an iron tower under the complex mountain conditions.

Description

technical field [0001] The invention relates to the field of disaster prevention and mitigation of power transmission lines, in particular to a method for quantitatively describing wind speed profiles at various positions in mountainous areas, a method and system for determining wind speed. Background technique [0002] The wind load of the transmission tower is unevenly distributed along the height direction of the tower, and is mainly affected by the wind speed profile. Under complex mountain conditions, the wind speed profiles at different positions of the mountain peaks, within the height range of 100m above the mountain surface, due to the strong surface topography, the wind speeds at different heights are different from the traditional power exponent profile , even at a low altitude of 30-70m, the wind speed increases sharply and then decreases slowly. The occurrence of these complex situations has greatly changed the wind load of the tower body under complex mountain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F113/04G06F113/08
CPCG06F30/20G06F2113/04G06F2113/08
Inventor 罗克伟鄢庆锰尹元李扬森林瑞宗刘志伟傅本钊张宏杰邵帅杨风利黄国李茂华
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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