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An Improved Calculation Method for Lightning Trip Rate of Distribution Lines

A technology of distribution lines and calculation methods, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve problems such as inability to perform accurate calculations, and achieve the effect of improving effectiveness and scientificity

Inactive Publication Date: 2019-05-21
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The calculation of the trip rate of this method is still in accordance with the original regulations, and it is also impossible to calculate accurately

Method used

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  • An Improved Calculation Method for Lightning Trip Rate of Distribution Lines
  • An Improved Calculation Method for Lightning Trip Rate of Distribution Lines
  • An Improved Calculation Method for Lightning Trip Rate of Distribution Lines

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Embodiment Construction

[0061] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0062] The calculation method of the improved distribution line lightning tripping rate of the present embodiment includes the following steps:

[0063] (1) Number each base tower of the entire power distribution line, respectively 1, 2, ..., n. Obtain the latitude and longitude coordinates of each base tower through the GIS system, and then use the lightning positioning system to count the number of lightning strikes within the line corridor of each tower, and then conv...

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Abstract

The present invention proposes an improved calculation method for the lightning tripping rate of distribution lines, which includes the following steps: (1) Obtain the latitude and longitude coordinates of each base tower, and then count the number of lightning strikes within the line corridor of each tower, and then convert the lightning strike density of the line corridor to is the direct lightning strike density of the line; (2) collect the basic parameter configuration of the line; (3) according to the lightning current data within the line corridor, fit the lightning current cumulative probability distribution formula and the probability density formula, and then combine the lightning location system’s line corridor lightning (4) Calculate the trip rate of direct lightning strikes for each base tower; (5) Calculate the trip rate of induced lightning for each base tower by interval combination statistics; (6) The lightning strike rate for the entire line Calculate the trip rate and analyze the lightning damage status of the line. Beneficial effects: it is possible to obtain a relatively accurate lightning trip rate of the distribution network, provide accurate data for lightning protection performance evaluation, and improve the effectiveness and scientificity of taking lightning protection measures.

Description

technical field [0001] The invention belongs to the field of lightning protection for power systems, and relates to the precise path of transmission line corridors based on lightning positioning data and GIS, and more specifically, relates to a calculation method for improving the lightning tripping rate of power distribution lines. Background technique [0002] As an important part of the power distribution system, the power distribution line undertakes the important task of distributing electric energy to the load, and its safe and stable operation is very important. Due to the low insulation level of distribution lines and weak protection against lightning, tripping accidents caused by lightning strikes account for a large proportion of distribution network faults. Both direct lightning strikes and induced lightning strikes may cause insulator flashovers and cause line trips. Some lightning flashover trips have no obvious traces afterwards, and it is difficult to confirm...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 杨仲江刘健卢慧慧肖扬
Owner NANJING UNIV OF INFORMATION SCI & TECH