Power transmission tower remaining life evaluation method based on corrosion model

A technology for transmission tower and life evaluation, which is applied in the field of electric power engineering, can solve problems such as remaining life evaluation of transmission towers that cannot be used, and achieves the effect of less parameters involved, strong practicability, and reduced research workload.

Active Publication Date: 2017-03-22
CENT CHINA BRANCH OF STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects and problems in the prior art that cannot evaluate the overall remaining life of the transmission tower, and provide a method for evaluating the remaining life of the transmission tower based on a corrosion model that can evaluate the overall remaining life of the transmission tower

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  • Power transmission tower remaining life evaluation method based on corrosion model
  • Power transmission tower remaining life evaluation method based on corrosion model
  • Power transmission tower remaining life evaluation method based on corrosion model

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Embodiment

[0103] A method for evaluating the remaining life of a transmission tower based on a corrosion model, taking a spanning transmission tower that has been used for 29 years in central China as the research object, the evaluation method includes the following steps:

[0104] a. Through the modeling analysis of the finite element model, determine the failure corrosion thickness δ of the transmission tower lim ;

[0105] First, if figure 1 , figure 2 As shown, the transmission tower models with different geometric slenderness ratios λ (20-250, interval 5) are established. In the model, the weakened thickness range δ of the gusset plate is considered to be increased from 0.1mm to 1.0mm. A set of models is calculated every 0.1mm, and Compare the mechanical properties of the weakened nodes with the intact nodes, study the changes in the mechanical properties of the transmission tower due to corrosion, apply constraints and loads, and use the nonlinear solution method to obtain the ...

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Abstract

The invention discloses a power transmission tower remaining life evaluation method based on a corrosion model. The evaluation method comprises the steps of a, determining invalid corrosion thickness delta<lim> of a power transmission tower through modeling analysis of a finite element model; b, calculating serving time t<max> when the power transmission tower reaches the invalid corrosion thickness delta<lim> according to a formula delta=At<n>, wherein the A and n are constant numbers; c, calculating serving time t<0> when the power transmission tower reaches current corrosion thickness delta<0> according to the formula delta=At<n>, wherein the A and n are constant numbers, and the current corrosion thickness delta<0> is obtained through actual detection; and d, calculating the remaining service life N<t> of the power transmission tower according to the formula N<t>=t<max>-t<0>. According to the design, the integrated remaining life of the power transmission tower can be evaluated, the accuracy is high, the application range is wide, the operation is simple and convenient, the cost is low, and the practicability is high.

Description

technical field [0001] The invention relates to the field of electric power engineering, in particular to a method for evaluating the remaining life of a transmission tower based on a corrosion model, which is mainly suitable for evaluating the overall remaining life of a power transmission tower. Background technique [0002] In recent years, with the rapid and steady growth of the national economy, my country's electric power industry has entered a stage of rapid development, among which high-voltage and ultra-high-voltage transmission lines have become the most important lifelines in my country's electric power projects. Industry already has a high technological level. The power transmission network undertakes the task of national power transmission. The safe and reliable operation of the transmission tower is crucial to ensure the reliable transmission of the entire power. As the main component of the transmission line, the transmission tower structure is the most importa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 刘溟何勇陈颢元金李薛雪涂长庚郭耀杰刘汉生
Owner CENT CHINA BRANCH OF STATE GRID CORP OF CHINA
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