Method for evaluating lightning protection performance of high-speed railway traction network

Abstract

The invention relates to a method for evaluating the lightning protection performance of a high-speed railway traction network. The method comprises the following steps of: dividing an evaluation area into a plurality of space grids by adopting a grid method, and counting a cloud-to-ground lightning density parameter and a lightning current probability density distribution parameter of each space grid within specific time based on massive lightning positioning system data by utilizing a computer by adopting a method for counting high-speed railway passage lightning parameters; establishing a calculation mode of calculating direct-lightning lightning strip-out rate, inductive thunder lightning strip-out rate and total lightning strip-out rate of each zone and the whole line of a high-speed railway within the specific time period by adopting a lightning strip-out rate calculation method; and taking the lightning strip-out rate of each zone as the basis, taking the whole-line lightning strip-out rate as the reference, acquiring thunder damage risk data information of each zone relative to the whole line within the specific time period, and realizing the lightning protection performance evaluation of the spatial and temporal difference of the high-speed railway traction network. According to the method, the calculated lightning strip-out rate is close to real conditions based on the massive perennial lightning positioning system observation data.

Description

technical field [0001] The invention relates to the field of lightning protection for electrified railways, in particular to a lightning protection performance evaluation method for a traction network of a high-speed railway, which is suitable for evaluating the lightning protection performance of an electrified railway traction network. Background technique [0002] The traction network of electrified railways is often attacked by lightning, causing failures such as tripping of traction substations, burning out of catenary cables, breaking of contact wires, and destruction of insulators. Statistics show that in China, the tripping of the traction network caused by lightning strike accounts for more than 30% of the total fault tripping, and lightning strike has become one of the important factors causing the tripping of the electrified railway traction network. In addition, the electrified railway traction network has no backup. Once the equipment is damaged or tripped due t...

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Problems solved by technology

According to the type of lightning strike on the transmission line, this method divides direct lightning strikes into counterattack and shielding strikes to analyze and calculate the tripping rate of lightning strikes, but does not consider the lightning strike risk of induced lightning; The network structure is different, so the calculation method of the lightning tripping rate of the transmission line is not suitable for the calculation of the lightning tripping rate of the high-speed railway line

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