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Statistical method of cumulative probability distribution of multi-section lightning current amplitude

A technology of cumulative probability distribution and lightning current amplitude, which is applied in calculation, complex mathematical operations, instruments, etc., can solve problems such as unreasonable distribution characteristics and inability to reflect the regional differences of passing through, and achieve the cumulative probability distribution of lightning current amplitude Flexible and accurate lightning activity law, the effect of refined lightning current amplitude cumulative probability distribution parameters

Active Publication Date: 2016-08-31
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

For cross-district and long-distance transmission lines, a single formula can only represent the comprehensive distribution characteristics of the lightning current in the corridor of the entire line, and cannot reflect the differences in the areas it passes through.
[0007] Therefore, in the context of cross-district and long-distance power transmission projects, it is unreasonable to still use a single distribution function to characterize the distribution characteristics of the lightning current amplitude in the entire line corridor

Method used

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  • Statistical method of cumulative probability distribution of multi-section lightning current amplitude
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  • Statistical method of cumulative probability distribution of multi-section lightning current amplitude

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] A multi-section lightning current amplitude cumulative probability distribution statistical method of the present invention comprises the following steps:

[0030] Step 1: Based on the latitude and longitude coordinates of the line towers, divide the transmission line into multiple grids of equal size along the corridor direction of the transmission line, and number all the grids in sequence;

[0031] Step 2: Start from the first grid that has not been traversed, traverse the grids in ascending order of grid numbers, and calculate the sum N of the number of flashes in the traversed grid L , until N L ≥2000 (when it is possible to traverse to a certain grid, N L =1990, when traversing the next grid, N L =2030, the two grids are still divided into a statistical section at this time), and the traversed grid is regarded as a sta...

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Abstract

The invention discloses a statistical method of the cumulative probability distribution of multi-section lightning current amplitude. Flashes of different frequencies of the same line are compared to fit a statistical result, a fit curve and a fitting residual error quadratic sum of the cumulative probability of the lightning current amplitude, and 2000 frequencies of lightning flashes are selected as threshold values to segment a line corridor. After the line corridor finishes being divided, curve fitting is carried out by sections to obtain the cumulative probability distribution formula of the lightning current amplitude among the intervals of a power transmission line corridor. Therefore, cumulative probability distribution parameter, which is obtained by statistics, of the lightning current amplitude of the power transmission line corridor can more accurately reflect the lightning activity routines of the line, and guide is provided for the anti-lightning calculation and the engineering design of the line.

Description

technical field [0001] The invention relates to the technical field of power grid lightning protection, in particular to a statistical method for the cumulative probability distribution of multi-section lightning current amplitudes. Background technique [0002] The cumulative probability distribution of lightning current amplitude is one of the basic lightning parameters to characterize lightning activities, carry out calculation analysis of lightning protection and lightning protection engineering design. Therefore, accurately obtaining the cumulative probability distribution of lightning current amplitude is of great significance for understanding the laws and characteristics of lightning activities, objectively evaluating the lightning resistance performance of transmission lines and towers, and guiding lightning protection engineering design. [0003] In the current calculation of lightning strikes, the formula recommended by IEEE is used to characterize the cumulative ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G06Q50/06
CPCG06F17/18G06Q50/06
Inventor 赵淳雷梦飞王佩谷山强吴军吴敏许衡林卿
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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