A form-finding method for large-section conductors of overhead transmission lines

A technology for overhead transmission lines and determination methods, which is applied in the field of form-finding determination for large-section conductors of overhead transmission lines, can solve problems such as sag and curvature distribution errors, neglect the bending resistance characteristics of conductors, and difficult engineering promotion, etc., and achieve technical solutions clear effect

Active Publication Date: 2019-08-16
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former adopts the catenary assumption, ignores the bending characteristics of the conductor, and cannot avoid the strong nonlinear characteristics under large spans, resulting in large errors in sag and curvature distribution; the latter is also due to strong nonlinear factors , the modeling process is more complicated, the calculation convergence is difficult to guarantee, and the engineering promotion is more difficult

Method used

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  • A form-finding method for large-section conductors of overhead transmission lines
  • A form-finding method for large-section conductors of overhead transmission lines
  • A form-finding method for large-section conductors of overhead transmission lines

Examples

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Embodiment 1

[0046] The invention of this example provides a method for determining the shape of a large cross-section conductor of an overhead transmission line, including, as figure 1 as shown,

[0047] 1. Line and related design parameter collection

[0048] The required data includes the wire type, span, pay-off tension, observed sag data, etc. used in different lines. Clarify the micrometeorological conditions of the location where the line is located, such as design wind speed, ice type, shape and thickness, etc.

[0049] 2. Theoretical process derivation and arrangement

[0050] Due to the large length-to-diameter ratio of the overhead power transmission conductor, which conforms to the characteristics of a super-long elastic thin rod, and has a circular cross section, the radial bending stiffness is consistent, and the torsion rate remains constant, so the curvature κ(s) of each point on its center line Satisfy the equation shown in formula (1).

[0051]

[0052] It can be s...

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Abstract

The invention relates to a form-finding determination method for a large-section conduction wire of an overhead power transmission line. The form-finding determination method comprises the following steps: obtaining a design parameter and a working environment condition of the power transmission line; determining a Hamiltonian system parameter of the conduction wire of the power transmission line; determining a centre line curvature distribution function of the conduction wire of the power transmission line; and determining sag distribution data of the conduction wire of the power transmission line. In the technical scheme provided in the invention, an effective method and means are provided for analyzing the form-finding problems, such as sag and curvature distribution characteristics of the large-section conduction wire on a horizontal stop, more accurately.

Description

[0001] Technical field: [0002] The invention relates to the field of disaster prevention and mitigation of power grids, and more particularly relates to a form-finding method for large-section conductors of overhead transmission lines. [0003] Background technique: [0004] Under the action of external loads such as gravity and wind force, the conductor of the transmission line will have a large displacement, thus forming the initial configuration of the conductor. The analysis of the displacement and stress distribution of the wire in this state is the so-called form-finding analysis. Large section (cross-sectional area ≥ 900mm 2 ) wire is a type of wire that has been developed and applied more in recent years. Accurately and reasonably performing form-finding calculations for large-section wires of overhead transmission lines is one of the important problems faced by line design and anti-vibration and anti-dance work this year. It is directly related to The sag character...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F2113/16Y02E60/00
Inventor 赵彬程永锋王景朝刘彬朱宽军杨加伦陈予恕
Owner CHINA ELECTRIC POWER RES INST
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