Anti-typhoon design method for pole tower in coastal area

A design method and anti-typhoon technology, applied in the field of power transmission lines, can solve the problems of insufficient gust effect and the ground wire does not consider the gust effect, etc., and achieve the effect of improving the ability to resist typhoon

Pending Publication Date: 2022-08-05
STATE GRID FUJIAN POWER ELECTRIC CO ECONOMIC RES INST +1
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  • Abstract
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Problems solved by technology

[0006] "Technical Regulations on the Design of Tower Structures for Overhead Power Transmission Lines" (SDGJ94-90, promulgated and implemented in 1990, hereinafter referred to as "90 regulations"); the design safety factor is 1.5, and the design wind speed is once in 30 years (500kV) and once in 15 years ( 220kV and below), the gust effect is not fully considered in the wind load calculation of the tower body, and the gust effect is not considered in the wind load calculation of the ground wire;

Method used

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  • Anti-typhoon design method for pole tower in coastal area
  • Anti-typhoon design method for pole tower in coastal area
  • Anti-typhoon design method for pole tower in coastal area

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Embodiment

[0053] Embodiment: This embodiment provides a typhoon resistance design method for towers in coastal areas, including the following steps:

[0054] Carry out the calculation of the wind load of the whole tower; the calculation method of the wind load of the tower includes designing the maximum wind speed of the typhoon, calculating the coefficient of variation of the wind pressure height of the tower, calculating the wind load of the guide line of the tower and calculating the wind load of the tower body;

[0055] Among them, the method of designing the maximum wind speed of the typhoon includes obtaining the known typhoon wind speed time-history curve, from which the average wind speed can be obtained from the typhoon time-history curve. and standard deviation σ ν , and then design the maximum wind speed of the typhoon according to the following calculation formula combined with the threshold method:

[0056]

[0057] Among them, V is the maximum wind speed of the typhoo...

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Abstract

The invention relates to the technical field of power transmission lines, and discloses a coastal region tower anti-typhoon design method which comprises the following steps: S1, designing the maximum typhoon wind speed according to a known typhoon wind speed time history curve; s2, calculating a tower wind pressure height change coefficient according to a wind pressure height coefficient designed during tower anti-typhoon design; s3, according to the designed typhoon maximum wind speed and the calculated tower wind pressure height change coefficient, the tower ground wire wind load and the tower body wind load are calculated; the method has the advantages that windproof technical guidance can be provided for the power transmission line, and the typhoon resisting capacity of the power transmission line is effectively improved.

Description

technical field [0001] The invention relates to the technical field of transmission lines, in particular to a typhoon-resistant design method for towers in coastal areas. Background technique [0002] Affected by global warming, wind disasters caused by special climates represented by typhoons tend to increase in frequency and severity in all parts of the world. At the same time, the results of a large number of field measurements in recent years have shown that the wind environment characteristics of the typhoon near the ground boundary layer are different from those of the benign climate model. As a structure sensitive to wind load, transmission towers are often collapsed in typhoon transit areas. Therefore, the current primary task is to compare the differences in the characteristic parameters of the typhoon and the conventional wind field, and to clarify the wind load acting on the tower under the action of the typhoon. [0003] For the wind load excitation calculation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/10G06F113/04G06F119/02
CPCG06F30/20G06F17/10G06F2113/04G06F2119/02Y02A50/00
Inventor 黄晓予石建徐晓立宋平林宇彬杨迪珊张劲波程诺陈学东阮筱菲陈国文
Owner STATE GRID FUJIAN POWER ELECTRIC CO ECONOMIC RES INST
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