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Real-time lightning stroke power transmission line risk assessment method

A transmission line and risk assessment technology, applied in the field of lightning protection of transmission lines, can solve problems affecting the strength and insulation properties of insulators, transmission line risks, hidden dangers, etc., to save time for search and line repair, ensure effectiveness and reliability, The effect of strong versatility and practicality

Inactive Publication Date: 2019-12-06
SOUTH CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

This large current may cause a short circuit of the transmission line, and a flashover may occur at the insulator near the lightning strike point
After a flashover occurs, the flashover area where the lightning current flows will emit a large amount of heat energy to ablate the insulator, affecting the strength and insulation characteristics of the insulator, making the transmission line after the lightning strike have potential risks and hidden dangers

Method used

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  • Real-time lightning stroke power transmission line risk assessment method
  • Real-time lightning stroke power transmission line risk assessment method
  • Real-time lightning stroke power transmission line risk assessment method

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Embodiment

[0053] The object of the present invention is achieved through the following technical solutions:

[0054] Such as figure 1 Shown is a flow chart of a real-time lightning strike transmission line risk assessment method, including steps:

[0055] S1. Collect transmission line information, and detect the real-time lightning situation in the square lightning monitoring area containing the transmission line;

[0056] The transmission line information includes the position of the towers at all levels of the line, the distance S between the towers, the height h of each lightning protection line of the line, the distance b between each lightning protection line, and the inclination angle θ between the horizontal line of the tower and the ground;

[0057] The length of the square area is the distance from the first level tower to the last level tower;

[0058] The real-time lightning situation includes the lightning occurrence point P (longitude, latitude) and the lightning current ...

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Abstract

The invention discloses a real-time lightning stroke power transmission line risk assessment method, which comprises the steps: S1, acquiring power transmission line information, and detecting a real-time lightning falling condition of a square lightning monitoring area; S2, calculating the average height of each lightning conductor of the power transmission line and the average distance between the lightning conductors, and establishing an equation; S3, solving a critical lightning current amplitude; S4, calculating the relationship between the abscissa of the intersection point of the lightning conductor lightning leading surface and the earth lightning leading surface and the lightning current amplitude; S5, solving the total lightning leading width according to the probability distribution of the lightning current amplitude, and solving a lightning leading region of the power transmission line; and S6, judging and evaluating the lightning stroke power transmission line probabilityaccording to the thunder leading area of the power transmission line. According to the real-time lightning stroke power transmission line risk assessment method, a reliable judgment basis is providedfor rapid searching and repairing of the power transmission line damage caused by lightning stroke of a power system; rapid searching and repairing of the line damaged by lightning stroke can be realized through cumulative analysis of the evaluation data; and the searching and line repairing time of the lightning stroke fault of the power transmission line is saved.

Description

technical field [0001] The invention relates to the technical field of lightning protection for transmission lines, in particular to a real-time lightning strike risk assessment method for transmission lines. Background technique [0002] Transmission lines have the characteristics of high voltage level, large space span, harsh operating environment, and complex terrain of line corridors. Therefore, they become the part with the highest failure probability in the power system, and their failure probability is much higher than that of transformers, busbars and other equipment. The main causes of transmission line failures are lightning strikes, wind deflection, bird damage, tree barriers, etc., and the proportion of lightning strike failures is the highest. [0003] At present, the research on the lightning induced width of transmission lines mostly stays in the statistics of lightning monitoring data in a certain area, and the factors considered are relatively single. Moreo...

Claims

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Application Information

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IPC IPC(8): G06F17/11
CPCG06F17/11
Inventor 邓红雷刘刚唐崇旺张莉彬刘昭
Owner SOUTH CHINA UNIV OF TECH
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