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Method for judging cloud-to-ground lightning high-risk section of line corridor in combination with topographic parameters

A technology for line corridors and terrain parameters, applied in structured data retrieval, geographic information databases, data processing applications, etc., can solve the problem of low practical value, no consideration of topographic features, analysis of cloud-to-ground lightning parameter distribution and lightning strike status of line corridors Low efficiency and other issues

Inactive Publication Date: 2016-07-27
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for judging the high-risk section of cloud-to-ground lightning in line corridors in combination with terrain parameters, so as to solve the existing technical method for judging the high-risk section of cloud-to-ground lightning in line corridors. Topographic and geomorphic characteristics lead to low efficiency and low precision in analyzing cloud-to-ground lightning parameter distribution and lightning strike status in line corridors, and the practical value of engineering applications is low

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  • Method for judging cloud-to-ground lightning high-risk section of line corridor in combination with topographic parameters
  • Method for judging cloud-to-ground lightning high-risk section of line corridor in combination with topographic parameters
  • Method for judging cloud-to-ground lightning high-risk section of line corridor in combination with topographic parameters

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Embodiment Construction

[0082] In the following, the present invention will be further described in detail in conjunction with an example of judging high-risk sections of cloud flashes in corridors of transmission lines above 330kV in a certain area.

[0083] The present invention combines terrain parameters to determine the method for high-risk sections of cloud-to-ground flashes in line corridors, comprising the following steps:

[0084] (1) Based on about 2.6 million pieces of positioning data of 3 or more stations in a certain region’s lightning monitoring system from 2005 to 2012, and about 110,000 artificial lightning records from meteorological observation stations in the region from 1998 to 2012, the lightning Day T d and flash density N g Fitting the relationship, we get

[0085] T d Based on 30 lightning days, N g =2.58 times / (km 2 · a), sort out the line through N g ≥2.5 times / (km 2 ·A) mine damage risk assessment for sections of the area, that is, for Ng2 ·A) The line section in ...

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Abstract

The invention discloses a method for judging a cloud-to-ground lightning high-risk section of a line corridor in combination with topographic parameters.The method comprises the steps of firstly, fitting the relation between a thunder and lightning day and the cloud-to-ground lightning density, conducting preliminary screening on lightning hazard risks of the line combination with the cloud-to-ground lightning density value and a line lightning stroke historical failure database, subsequently, conducting TPI analysis, combining the cloud-to-ground lightning density with topographic features, conducting further screening on the TPI threshold value, then calculating the back-striking, the shielding failure and total lightning trip-out rate, and finally according to a lightning trip-out rate control range, judging the cloud-to-ground lightning high-risk of the line corridor.By means of the method, organic combination of the cloud-to-ground lightning density, topographic position indexes and line lightning stroke historical data is achieved, the defect that the topographic features are not considered in traditional methods is made up, and the judgment result is more objective and scientific.

Description

technical field [0001] The invention relates to the technical field of state evaluation and diagnosis of power equipment, in particular to a method for judging high-risk sections of cloud-to-ground lightning in power line corridors. Background technique [0002] In recent years, the overhead transmission lines of 220kV and above in the power grid have grown rapidly. With the expansion of the scale of the power grid and the expansion of radiation areas, in the operation and maintenance of power transmission and transformation equipment, overhead transmission lines have become the weakness of the power grid operation, and the terrain and landforms along the transmission lines are different. , is greatly affected by the natural environment, among which lightning strikes are the most common, and the impact of lightning damage on line operation continues to increase, seriously endangering the safe and stable operation of the power grid. When the scale of the power grid is small, ...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
CPCG06Q50/06G06F16/29
Inventor 琚泽立蒲路赵学风任双赞杨传凯
Owner STATE GRID CORP OF CHINA
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