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Method for determining wind load of overhead transmission line at hill or cliff micro terrain

A technology for overhead transmission lines and transmission lines, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as inaccurate calculation methods, and achieve the effect of easy methods

Active Publication Date: 2014-10-01
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the previous calculation method is not accurate enough

Method used

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  • Method for determining wind load of overhead transmission line at hill or cliff micro terrain
  • Method for determining wind load of overhead transmission line at hill or cliff micro terrain
  • Method for determining wind load of overhead transmission line at hill or cliff micro terrain

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Embodiment 1

[0047] like figure 2 The transmission line shown in the figure is taken as an example for illustration. The reference wind speed at a height of 10m is 30m / s, and the design wind speed is calculated when the tower is located at different positions on the hill.

[0048] 1. Use a total station to measure the mountain height H and ground inclination β. Measure the mountain height H=50m, slope s=0.1, judge whether the power line tower is located on the hill or cliff micro-topography, the transmission line tower is located on the hill micro-topography; simplify the calculation model, calculate the parameter L h =250m, determine the hill micro-topography height correction coefficient α according to the following table:

[0049] hills:

[0050] When H≥100m, α=0.4+s (when s≥0.3, take s=0.3)

[0051] When H≤50m, α=0.3+s (when s≥0.3, take s=0.3)

[0052] When 50m

[0053] So α=0.4.

[0054] 2. According to the reference positio...

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Abstract

The invention relates to a method for determining the wind load of an overhead transmission line at hill or cliff micro terrain. The wind speed or wind pressure, at an optional position of a hill or a cliff, of the overhead transmission line is determined to accurately determine the wind load of the overhead transmission line at the hill or the cliff. Compared with a traditional wind load determining method, the method is more accurate, and reference is provided for overhead transmission line construction at the hill or cliff micro terrain.

Description

Technical field: [0001] The invention relates to the field of determining the wind load of an overhead transmission line, in particular to a method for determining the wind load of an overhead transmission line on hills or cliff micro-topography. Background technique: [0002] Overhead transmission line corridors are hundreds of kilometers long, and UHV transmission lines are thousands of kilometers long. Transmission lines will pass through various terrains and be affected by various meteorological environments. In the past, wind loads in mountainous areas were generally calculated by increasing coefficients to determine wind loads. [0003] The existing "Building Structure Load Code" uses correction coefficients to modify the wind pressure height variation coefficient of buildings in mountainous areas. For mountain peaks (hills), only the correction of the top of the mountain is given, and other places are obtained by linear interpolation. As follows. [0004] For moun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 高雁杨靖波
Owner STATE GRID CORP OF CHINA