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Reynolds number and shielding effect-based multi-split conductor shape coefficient calculation method

A technology of shielding effect and shape coefficient, applied in calculation, data processing application, instrument, etc., can solve problems such as large wind load calculation value, too conservative tower structure design, improper value selection, etc., to optimize numerical calculation and improve overall investment Economical effect

Pending Publication Date: 2019-08-16
CENT SOUTHERN CHINA ELECTRIC POWER DESIGN INST CHINA POWER ENG CONSULTING GROUP CORP
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AI Technical Summary

Problems solved by technology

Conductor shape factor C d Improper value selection may lead to too large wind load calculation value, making the tower structure design too conservative, and the resulting economic losses cannot be ignored

Method used

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  • Reynolds number and shielding effect-based multi-split conductor shape coefficient calculation method
  • Reynolds number and shielding effect-based multi-split conductor shape coefficient calculation method
  • Reynolds number and shielding effect-based multi-split conductor shape coefficient calculation method

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

[0027] In this embodiment, LGJ-630 / 45 wire is used in a uniform flow field.

[0028] figure 1 Shown is the derivation process of the calculation formula of the multi-split wire shape coefficient based on the Reynolds number and the shielding effect.

[0029] Step 1 will affect the wire shape coefficient C d The factors are divided into Reynolds number effect and shielding effect; Step 2, use the experimental data to derive the Reynolds number R e Variation relationship with wind speed v and wire cross-sectional diameter D; step 3, deduce the middle value C of the wire shape coefficient d1 with Reynolds number R e , the change relationship of turbulence degree; Step 4, deduce the shielding effect coefficient C s with Reynolds ...

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Abstract

The invention provides a Reynolds number and shielding effect-based multi-split conductor shape coefficient calculation method. The method is characterized by comprising the following steps: obtaininga Reynolds number Re and a shielding effect coefficient Cs and substituting the Reynolds number Re and the shielding effect coefficient Cs into the following formula to obtain a conductor shape coefficient Cd: wherein v is the wind speed, D is the section diameter of a conductor, n is the number of split conductors, S is the splitting interval, and Cd1 is the intermediate quantity of the conductor shape coefficient. The invention aims to provide a multi-split conductor shape coefficient calculation method based on Reynolds number and shielding effect for the defects in the prior art, and aimsto optimize the calculation and analysis of multi-split conductor shape coefficient Cd influence factors in the existing theory.

Description

technical field [0001] The invention belongs to the field of transmission line engineering, and more specifically relates to a method for calculating the shape coefficient of multi-split conductors based on Reynolds number and shielding effect. Background technique [0002] UHV transmission lines generally use six-split and eight-split conductors. How to reasonably determine the wind load acting on the conductors is of great significance when designing lines. [0003] After years of development, my country's transmission line design standards have formed a standard specification system with national standards, industry standards and enterprise standards as the core. The code considers the influence of the dynamic effect of the wind on the conductor, and introduces a correlation coefficient to adjust the wind pressure, and converts the fluctuating wind load into a static wind load for calculation, which is called the wind load adjustment coefficient. [0004] The American st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 周古月张瑚刘文勋李健岳浩雷雨泽
Owner CENT SOUTHERN CHINA ELECTRIC POWER DESIGN INST CHINA POWER ENG CONSULTING GROUP CORP
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