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Mountain area plane gust coefficient calculation method

A technology of coefficient calculation and gust, applied in calculation, computer-aided design, data processing application, etc., can solve problems such as early warning of difficult and strong gust events, reduced reliability of power system operation, and increased risk of power grid operation, so as to achieve management and control of operational risks, The effect of improving the level of operational reliability

Pending Publication Date: 2022-04-12
STATE GRID BEIJING ELECTRIC POWER +2
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  • Application Information

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Problems solved by technology

[0003] However, the existing calculation method of gust coefficient only considers the roughness and height from the ground, and does not consider the influence of terrain undulations on the gust coefficient. Reduced reliability

Method used

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  • Mountain area plane gust coefficient calculation method
  • Mountain area plane gust coefficient calculation method
  • Mountain area plane gust coefficient calculation method

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Embodiment 1

[0036] This embodiment provides the specific structure of the method for calculating the plane gust coefficient in mountainous areas, such as figure 1 As shown, the steps include:

[0037] Create a planar grid;

[0038] Based on the planar grid, calculate the average terrain elevation;

[0039] Calculate the height of the canyon surface based on the planar grid;

[0040] Calculate the height of the mountain surface based on the planar grid;

[0041] Calculate the grid gust coefficient based on the average terrain elevation, canyon face height, and mountain face height.

[0042] Further, the planarized grid is established by using the Lambert conformal conic projection to project the area of ​​interest onto a 1km×1km grid.

[0043] Further, the calculation of the average terrain elevation is to use the refined terrain elevation data to obtain the average terrain elevation data of each grid point, and the terrain elevation of the i-th grid point is represented by Z i expres...

Embodiment 2

[0066] Such as figure 2 and image 3 As shown, the calculation method of the plane gust coefficient in mountainous areas includes:

[0067] Option 1: Utilize the technical method of the present invention to calculate such as figure 2 The distribution of gust coefficients in the Beijing area shown;

[0068] Scheme 2: Based on the data of 150 ground observation stations in the Beijing area, select the period of time when the wind speed is relatively high and calculate as follows image 3 The gust coefficient plane distribution shown.

[0069] By comparing the results of the two schemes, the following conclusions can be drawn:

[0070] The gust coefficient distribution maps obtained by the two schemes are relatively similar in terms of distribution shape and magnitude. This method simulates the large-value area of ​​​​the gust coefficient in the valley in the northern mountainous area of ​​western Beijing, which is consistent with most of the ground observation stations in ...

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Abstract

The invention discloses a mountain area plane gust coefficient calculation method. The method comprises the following steps: establishing a planar grid; calculating an average terrain elevation based on the planarized grid; calculating the height of the canyon surface based on the planarized grid; calculating the height of a peak surface based on the planarized grid; based on the average terrain elevation, the canyon surface height and the peak surface height, the lattice gust coefficient is calculated, the method is suitable for the technical field of power grid wind disaster prevention, the correlation model between the gust coefficient and the topographic relief is established, and the influence of the topographic relief on the gust coefficient is fully considered; according to the method, the plane distribution of gust coefficients under different atmospheric motion backgrounds is calculated, early warning can be carried out on possible strong gust events, the operation risk of a power grid can be managed and controlled in a targeted mode, and the operation reliability level of a power system is improved.

Description

technical field [0001] The invention belongs to the technical field of power grid wind disaster prevention, in particular to a method for calculating plane gust coefficients in mountainous areas. Background technique [0002] The research on the gust coefficient mainly considers the ground roughness and the height from the ground. The "Building Structure Load Code" divides the ground roughness into four categories: A, B, C, and D, respectively: A, offshore sea surface and islands, coasts, Lakeshore and desert areas; B, fields, villages, jungles, hills and towns with sparse houses; C, urban areas with dense buildings; D, urban areas with dense buildings and high houses, for different heights The gust coefficient gives a reference value; [0003] However, the existing calculation method of gust coefficient only considers the roughness and height from the ground, and does not consider the influence of terrain undulations on the gust coefficient. Reduced reliability. Content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T11/20G06Q10/06G06Q50/06G06F113/08
Inventor 肖擎曜王鹏闫春江吕瑞谭磊何晓凤赵留学齐伟强王晓峰赵东
Owner STATE GRID BEIJING ELECTRIC POWER