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Initial shape-finding analysis method and system for icing stress of power transmission line

A transmission line and form-finding analysis technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effect of improving pertinence and calculation accuracy

Active Publication Date: 2019-11-08
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an initial form-finding analysis method and system for power transmission line icing stress, which is used to solve the technical problem that form-finding analysis is required before using finite element method combined with dynamic equations to analyze power transmission line icing stress

Method used

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  • Initial shape-finding analysis method and system for icing stress of power transmission line
  • Initial shape-finding analysis method and system for icing stress of power transmission line
  • Initial shape-finding analysis method and system for icing stress of power transmission line

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Embodiment 1

[0032] The initial form-finding analysis method for the icing force of the transmission line in this embodiment includes the following steps:

[0033] (1) Assuming that the wire is divided into N wire unit segments on average in the horizontal direction within the entire span, the wire unit nodes at both ends of the i-th unit segment are respectively recorded as i and i+1, and their displacement vectors are respectively recorded as:

[0034] {u i}={x i ,y i ,z i},{u i+1}={x i+1 ,y i+1 ,z i+1} (1)

[0035] Among them, (x i ,y i ,z i ) is the spatial coordinate position of the i wire unit node.

[0036] (2) Regardless of the windage in the initial state, there are:

[0037] z i =z i+1 =0 (2)

[0038] (3) According to the uniform distribution of wire unit nodes in the horizontal direction within the span, there are:

[0039]

[0040] (4) According to x i and x i+1 y can be obtained by the catenary equation i and y i+1 , so the initial displacement vector of...

Embodiment 2

[0052] This embodiment is an application example of Embodiment 1.

[0053] Set the wires within a certain span, the parameter is: E=68830(N / mm 2 ), A=425.24 (mm 2 ), γ / σ 0 =6×10 -4 (1 / m), L=1000(m), H=0(m), T 0 =30011(N).

[0054] According to the initial form-finding analysis method of power transmission line icing force provided by the present invention, the initial form-finding image of the wire can be obtained as figure 2 shown.

Embodiment 3

[0056] This embodiment provides a computer system, including a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the steps in any of the foregoing embodiments are implemented.

[0057] In summary, the method and system for initial form-finding analysis of transmission line icing force of the present invention can provide an initial calculation basis for iterative calculations, and improve the pertinence and calculation accuracy of transmission line icing force analysis.

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Abstract

The invention discloses an initial shape-finding analysis method and system for icing stress of a power transmission line. The method comprises: equally dividing a wire into a plurality of wire unit sections in the horizontal direction in the whole span; determining an initial displacement vector of each conductor unit node through a catenary equation; and according to the elastic modulus, calculating and obtaining the initial original length and the elastic rigidity of each conductor unit section. The initial original length and the elastic rigidity of each conductor unit section can be quickly determined, initial calculation data are provided for iterative calculation when a finite element method is combined with a kinetic equation to analyze the icing stress of the power transmission line, and the pertinence and the calculation precision of icing stress analysis of the power transmission line are improved.

Description

technical field [0001] The invention relates to the technical field of power transmission line protection, in particular to an initial form-finding analysis method and system for power transmission line icing stress. Background technique [0002] Icing of transmission lines in winter has become an important factor affecting the safe and stable operation of power grids. To study the problem of icing on transmission lines, it is necessary to analyze the force of transmission lines under icing conditions. [0003] At present, the force analysis of icing on transmission lines usually adopts finite element method, combined with dynamic equations for iterative calculation, but before iterative calculation, the initial form-finding analysis of icing on transmission lines is the basis. Contents of the invention [0004] The invention provides an initial form-finding analysis method and system for ice-covered force of transmission lines, which are used to solve the technical proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陆佳政简洲郭俊杨莉怀晓伟邸悦伦
Owner STATE GRID HUNAN ELECTRIC POWER
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