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Method and system for calculating icing thickness of tension resistant tower wire based on weighing method

A technology of ice thickness and calculation method, which is applied in calculation, special data processing applications, instruments, etc., and can solve problems such as calculation result errors

Active Publication Date: 2014-10-08
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It aims to solve the problem of large calculation result errors in engineering applications in the prior art

Method used

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  • Method and system for calculating icing thickness of tension resistant tower wire based on weighing method
  • Method and system for calculating icing thickness of tension resistant tower wire based on weighing method
  • Method and system for calculating icing thickness of tension resistant tower wire based on weighing method

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Embodiment 1

[0153] The Haiyang Township section of the 500kV Guishan Line A and B under the jurisdiction of the EHV transmission company is a key area of ​​icing. There have been accidents of tower collapse and disconnection due to icing, and it is a key observation area of ​​the company's icing. In this study, the icing process of this section on December 16, 2013 was selected for analysis and verification. Figure 7 It is a schematic diagram of the geographic location of the Haiyang Township section of Guishan Line A and B.

[0154] It can be seen that the middle part of the Haiyang Township section of Guishan Line A and B is a basin, with hills on both sides. When the South China stationary front passes through in winter, the ice cover is light because the basin has the function of wind protection and heat preservation, and the ice cover thickness of the hillsides on both sides increases sharply, and the ice cover is the thickest at the tuyeres on the top of the mountain.

[0155] Acc...

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Abstract

The invention discloses a method and a system for calculating the icing thickness of a tension resistant tower wire based on a weighing method. The method comprises the following steps: firstly, obtaining the vertical force and the horizontal tension of the tension resistant tower wire without icing; then, calculating and obtaining the horizontal stress of the wire without icing according to the horizontal tension without icing; obtaining the air temperature and the second monitoring tension value of a suspension point during icing; calculating the vertical force and the horizontal tension during icing; calculating the angle of inclination during icing, and further obtaining the weight per unit length of the iced wire; and finally, obtaining the icing thickness of the wire according to the weight per unit length of the iced wire, and the dead weight per unit length of the wire without icing. Therefore, the defect that a model for calculating the icing thickness of the tension resistant tower wire is lacked in the engineering application is remedied. Besides, the method has the advantages of few input monitoring parameters, low requirements for monitoring equipment, high calculating accuracy and the like. The effect of the method in the practical engineering application is good, and the method has good popularization and application prospects.

Description

technical field [0001] The invention relates to the field of icing calculation of power transmission lines, in particular to a method and system for calculating the icing thickness of strain tower conductors based on a weighing method. Background technique [0002] Icing of transmission lines is a major threat to the safe operation of power grids. Severe icing will lead to major accidents such as downed towers and disconnected lines. In order to timely and effectively monitor and warn ice conditions during the icing period, China Southern Power Grid has established an icing early warning system, which provides huge technical support for anti-icing staff to make anti-icing and ice-melting decisions. [0003] The ice thickness calculation model is an important part of the ice early warning system. The basic data collected by the icing monitoring terminal can be converted into the on-site ice thickness through the ice thickness calculation model, so as to directly and accurate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 张厚荣
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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