Tower pole icing disaster risk prediction method based on safety margin

A safety margin and tower technology, applied in the fields of instrumentation, calculation, electrical and digital data processing, etc., can solve the problems such as the inability to fully reflect the safety status of the middle tower structure, and reduce the probability of ice-covered tower collapse accidents. The effect of improving operational reliability

Active Publication Date: 2013-03-13
WUHAN UNIV
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Problems solved by technology

At present, the lack of prediction methods for icing disaster accidents on transmission lines cannot fully reflect the safety status of tower structures in overhead transmission lines under various operating conditions.

Method used

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  • Tower pole icing disaster risk prediction method based on safety margin
  • Tower pole icing disaster risk prediction method based on safety margin
  • Tower pole icing disaster risk prediction method based on safety margin

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Embodiment Construction

[0028] The method of the invention combines finite element numerical simulation with data regression analysis, adopts the finite element method to construct the pole-tower coupling model in the overhead transmission line according to the size ratio of 1:1, and fully considers the main force factors of the line under various static conditions, and the overlay The force simulation of various operating conditions of the ice pole tower coupling model is carried out; on this basis, the concept of safety margin value is proposed, the regression analysis and data fitting are carried out on the force simulation results, and the safety margin curve of the pole tower is obtained. The margin curve obtains the real-time safety margin value of the tower, and judges the icing risk of the tower in real time based on the safety margin value. The flow chart of the inventive method is referring to figure 1 .

[0029] figure 2 It is a schematic diagram of the tower coupling model constructed ...

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Abstract

The invention provides a tower pole icing disaster risk prediction method based on the safety margin. With the method, finite element numerical value simulation and data regression analysis are combined; a finite element method is adopted to build a 1:1 overhead transmission line tower pole coupling model; the main stressed factor of a line under various static conditions is comprehensively considered; simulation calculation is carried out to various operation working conditions of an icing line model; and on the basis, a simulation result is subjected to regression analysis and data fitting by the concept of the safety margin to obtain the safety margin curve of a power transmission tower line system so as to obtain the safety level of the power transmission tower line system. The method disclosed by the invention belongs to the safety evaluation field of the power transmission tower line system, the icing and tower falling risk of the power transmission tower line system can be solved, the safety margin range of the tower line system is given in real time so as to determine the line icing risk level at present, a basis is given for formulating an icing-proof transformation scheme, the formulation principle of the icing-proof transformation scheme is determined, and the operation reliability of the power transmission tower line system is improved.

Description

technical field [0001] The invention belongs to the field of safety evaluation of power transmission tower line systems, in particular to a method for predicting the risk of tower icing disasters based on safety margins. Background technique [0002] Icing is one of the common phenomena in nature, and the icing of conductors, ground wires and insulators of overhead transmission lines will pose a threat to its safe and stable operation, especially the collapse of the tower caused by icing, once it occurs, it will cause serious damage. Economic loss and social impact. With the rapid development of my country's economy, along with the large-scale construction of ultra-high voltage and ultra-high voltage power lines, the requirements for the safety and stability of the power system are getting higher and higher. Preventing a series of disasters and accidents caused by icing One of the major problems that the industry urgently needs to solve. [0003] Icing disasters in my count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 阮江军周蠡杜志叶刘超
Owner WUHAN UNIV
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