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Differentiated lightning protection method for power transmission lines

A transmission line, differentiated technology, applied in the installation of electrical components, cables, overhead installation, etc., can solve the problem of low lightning protection performance, and achieve the effect of improving lightning protection performance and finely managing the power grid

Active Publication Date: 2013-08-07
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a differential lightning protection method for transmission lines, which solves the problem of low lightning protection performance in the prior art

Method used

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Experimental program
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Embodiment

[0020] Technical scheme of the present invention comprises the following steps:

[0021] Step 1, collect statistical transmission line information; collect statistical information including line corridor lightning parameter statistics and line characteristic parameter statistics; described lightning parameter statistics is based on the lightning data accumulated in the operation of the lightning monitoring system, and the line corridor is carried out in the form of a grid Divide, count, analyze and obtain lightning parameters that can reflect the lightning density of the line corridor and the cumulative probability distribution of lightning current amplitude at different times and in different regions; the line characteristic parameter statistics include line basic information, tower structure And insulation, corridor topographic parameters statistics.

[0022] Step 2: Lightning protection calculation and lightning protection performance risk assessment are carried out base by...

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Abstract

The invention relates to a differentiated lightning protection method for power transmission lines. The differentiated lightning protection method includes: collecting and making statistics on information of a power transmission line; performing lightning protection computation and lightning protection performance risk assessment for every base tower; specifically making lightning protecting measures according to the results of the risk assessment, risk determining factors and characters of lightning protection measures and combining with the line operation situations; and performing safety risk assessment again and economic evaluation for the made lightning protection measures. Differences of the power transmission line in time and space are fully taken into consideration, various factors and characters like thunder and lightning activities and structures of the power transmission line and the topography are comprehensively taken into consideration, lightning protection computation for the power transmission line for every base tower is performed by utilizing thunder and lightning parameters obtained by statistic analysis of data monitored by a thunder and lightning monitoring system, degrees of corresponding lightning protection performance for base towers in one power transmission line are reflected, a power transmission line designing and operating department is effectively assisted to improve the lightning protection performance of the power transmission line by taking the lightning protection measures more meticulously in a targeted manner, and a power grid can be managed in a more elaborate manner.

Description

technical field [0001] The invention relates to a lightning protection method, in particular to a differential lightning protection method for transmission lines. Background technique [0002] In the prior art, the lightning risk assessment of transmission lines mainly relies on the calculation of the lightning resistance level and lightning trip rate of the transmission line, and generally only calculates the lightning trip rate of several typical towers in the line under typical topography and traditional lightning parameters. When evaluating the lightning flashover characteristics of the entire line, the calculated lightning trip rate of typical towers is generally only weighted and averaged according to the ratio of various topography and landforms in the line corridor, and the analysis content is not comprehensive and detailed; The relative risk of tower lightning flashover, the evaluation result is not intuitive. Contents of the invention [0003] Aiming at the pro...

Claims

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Application Information

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IPC IPC(8): H02G7/00
Inventor 于鑫刘明慧
Owner STATE GRID CORP OF CHINA
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