Calculation method for large-area region cloud-to-ground lightning density based on improved grid method

It is a technique for ground flash density and large area, which is applied in calculation, special data processing applications, instruments, etc. It can solve the problems of reducing the amount of calculation and inaccurate calculation results of ground flash density, and achieves the effect of accurate calculation results
CN104063602AInactive Publication Date: 2014-09-24TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2014-09-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a calculation method for large-area region cloud-to-ground lightning density based on an improved grid method. The calculation method belongs to the technical field of power line design. The calculation method comprises the steps that a ground lightning database is created, and the database contains ground lightning time and geographical position information; the longitude range and latitude range of a selected region are divided into different grid cells according to selected accuracy, the left and right sides of the grid cell coincide with the longitude line, and the upper and lower sides of the grid cell coincide with the altitude line, the division accuracy is set to be p, the altitude of one side, close to the equator, of the upper and lower sides of the grid cell is lat, and the area of each grid cell is calculated; the annual ground lightning times of each grid cell is calculated according to the data statistics of the ground lightning database; the cloud-to-ground density of each grid cell is calculated according to the divided grid areas; the calculation result is displayed in a digital map. The calculation method can calculate the cloud-to-ground lightning density of regions with large latitude difference more accurately and provide an effective reference frame for the selection of lightning protection level in power line design and reconstruction.
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Description

technical field

[0001] The invention belongs to the technical field of power circuit design, and in particular relates to an improved method for calculating ground flash density by using a grid method for a large area. Background technique

[0002] The ground flash density is the number of cloud-to-ground lightning strikes per square kilometer per year, which characterizes the frequency of lightning discharges from thunder clouds to the ground, and is one of the basic parameters for evaluating the lightning resistance level of transmission lines. At present, in the design and transformation of power lines, the annual average lightning days, ground lightning strikes, ground flash density and other information collected by conventional ground meteorological observation stations are still used as the basic data for the assessment of the lightning resistance level of transmission lines. According to the relevant regulations: if a weather station manually records a sound of light...

Claims

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