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Power transmission wire shape finding method, apparatus and device

A technology for transmission wires and transmission lines, which is applied to cable installation devices, cable installations, electrical components, etc., can solve the problems of inaccurate calculation results and difficulty in obtaining initial state information without prestress, and achieve simple and fast calculation. Effect

Active Publication Date: 2020-04-10
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a form-finding method, device and equipment for a power transmission wire, which solves the problem that the traditional finite element method is difficult to obtain the initial state information without prestress when performing shape-finding on the power transmission wire in the prior art, which leads to inaccurate calculation results question

Method used

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  • Power transmission wire shape finding method, apparatus and device
  • Power transmission wire shape finding method, apparatus and device
  • Power transmission wire shape finding method, apparatus and device

Examples

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Embodiment 2

[0082] In this embodiment, the parameters of the tension gear are shown in Table 1; the model of the wire is LGJQ-300 / 40, and the parameters are shown in Table 2; the left and right strain insulator strings are the same, and the parameters are shown in Table 3; the spacing parameters of the spacers L i (i=1,...,n+1) As shown in Table 4, the weight is 100N.

[0083] Table 1 Typical tensile section parameters

[0084]

[0085] Table 2 wire parameters

[0086]

[0087] Table 3 Parameters of tension insulator strings

[0088]

[0089] Table 4 Spacer Spacing Parameters

[0090] serial number 1 2 3 4 5 6 7 8 9 Left tension file 35 60 70 70 75 70 65 55 32 Leap file 30 50 60 65 70 70 60 55 30 Right tension gear 35 50 55 55 60 55 50 50 30

[0091] The result of form-finding is as follows Figure 7 as shown, Figure 7 Among them, x and z are the horizontal and vertical coordinates of the wire in the tension ...

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Abstract

The invention discloses a power transmission wire shape finding method, system and device. The method comprises the following steps of: obtaining power transmission line information of a wire and determining a wire type; based on the line information and the wire type, establishing a form-finding transcendental equation set and a constraint equation set according to a force balance condition at aspacer; solving the transcendental equation set and the constraint equation set to obtain a spacer height difference, segmenting the conductor based on the spacer height difference, and calculating conductor sag and stress distribution in the conductor segment by adopting a catenary method; and determining the shape of the wire according to the spacer height difference, the wire sag and the stressdistribution. According to the method, the problem of inaccurate shape finding result caused by the fact that the prestress-free initial state information is difficult to obtain in an existing finiteelement method is solved. The method can be used for power transmission wire shape finding under complex conditions such as strain insulator strings, spacers and concentrated loads, and is wide in application range.

Description

technical field [0001] The invention relates to the technical field of form-finding for transmission line structures, in particular to a form-finding method, device and equipment for a transmission line. Background technique [0002] Form-finding of transmission wires is the basis of dynamic analysis of transmission towers, and finite element software or methods are the most commonly used form-finding methods at present. However, when using the finite element method to find form, it is necessary to use the configuration without prestressed state as the initial configuration, and perform nonlinear iterative calculations until the given convergence conditions are met. In the construction of transmission lines, transmission conductors are usually erected in units of a tension section. According to this erection method, it is generally difficult for us to obtain accurate information on the initial stress-free state of the conductor, such as the natural length of each wire in the...

Claims

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Application Information

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IPC IPC(8): H02G1/00
CPCH02G1/00
Inventor 黄正聂铭谢文平雷旭罗啸宇刘小璐
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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