A method for lightning risk assessment of traction network of high-speed railway based on analytic hierarchy process

Abstract

A high-speed railway traction net lightening net lightening disaster risk evaluation method based on a hierarchy analysis method comprises the following steps: S1, setting each piece of information of high-speed railway; S2, dividing the high-speed railway to a plurality of spatial grid sections which correspond with each power supply arm section according to a grid method; S3, calculating for obtaining a direct lightening strike trip-out rate, indirect lightening strike trip-out rate and a total lightening strike trip-out rate of each grid section; S4, performing weighted arithmetic averaging on the total lightening strike trip-out rate for obtaining a full-line average lightening strike trip-out rate, performing lightening-proof performance evaluation on the total lightening strike trip-out rate of each grid section through utilizing the full-line average lightening strike trip-out rate as a reference value, and determining lightening disaster risk grade; S5, calculating each percentage between the grid sections where the lightening disaster risk in each power supply arm section is in a certain grade and total grid sections in each power supply arm section; and S6, determining a lightening disaster risk weight vector of each power supply arm section based on an easy-flash section hierarchy model of the high-speed railway. The high-speed railway traction net lightening net lightening disaster risk evaluation method has the beneficial effects of: realizing accurate evaluation for lightening disaster risk of each power supply arm section of the high-speed railway, and improving lightening-proof level of the high-speed railway.

Description

technical field [0001] The invention relates to the field of lightning protection for electrified railways, in particular to an analytic hierarchy process-based lightning risk assessment method for traction networks of high-speed railways, and is especially suitable for evaluating flash-prone sections of traction networks for electrified railways. Background technique [0002] China has a vast territory, complex and changeable terrain and climate, and the distribution of frequency and intensity of lightning activities is very uneven, and lightning hazards are very serious in some areas. At the same time, due to the large area of ​​high-speed railways adopting the viaduct laying method, the characteristics and impact of lightning strikes are quite different from those of ordinary speed railways and power transmission lines. Faults such as tripping of railway traction substations and damage to insulators occur frequently. Therefore, conducting a more scientific and targeted l...

AI Technical Summary

Problems solved by technology

The lightning risk results of each grid section and power supply arm section of the high-speed rail line can be obtained by this method, but the disadvantage of this invention is that the method only uses a simple arithmetic mean method to obtain the average lightning strike of each power supply arm section Trip rate, while individual differences may be ignored in the process of arithmetic mean, it is easily affected by extreme values, there is a certain error, and it cannot accurately reflect the strength of lightning risk of each power supply arm section

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