Direct lightning analysis method for calculation of projected area of ​​three-dimensional exposed arc surface of high-speed railway traction network

Abstract

A direct lightning analyzing method for a high speed railway and adopting traction network three-dimensional exposure arc surface projection area calculation basically includes the following steps: (1) acquiring basic line information of the high speed railway, dividing spans with consistent span length, high level bridge structure height, traction network electric and geological structure characteristic parameters into a class, conducting statistics on lightning activity parameters along the line, and enabling the parameters to correspond to the spans of different classes; (2) building a three-dimensional lightning model of a span of the class i according to the traction network characteristic parameters of the class i, calculating the vertical projection area and the direct lightning striking probability of the traction network three-dimensional exposure arc surface, and combining the lightning parameters of the spans to calculate the comprehensive direct lightning striking probability and the year direct lightning trip-out rate of all the spans of the class i; (3) repeating the step (2) to calculate the comprehensive lightning striking probability and the year direct lightning trip-out rate of traction networks of all classes; (4) calculating the comprehensive direct lightning striking probability and the year direct lightning trip-out rate of the full line. By means of the method, the pertinence and the effectiveness of high speed railway direct lightning protection can be improved.

Description

technical field [0001] The invention relates to the technical field of high-speed railway lightning protection, in particular to a direct lightning analysis method for calculating the projection area of ​​a three-dimensional exposed arc surface of a high-speed railway traction network. Background technique [0002] In recent years, with the continuous increase of the operating mileage of my country's high-speed railways, outages caused by lightning strikes have also increased year by year. In particular, high-speed railways mostly use viaducts, which are more vulnerable to lightning strikes than ordinary electrified railways, seriously threatening safe driving. . The traction network undertakes the important task of continuously and reliably supplying power to locomotives. It is one of the key equipment of high-speed railways. Suffering from lightning strikes may cause interruption of power supply and suspension of driving. Lightning overvoltage may also invade substations o...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the existing high-speed railway direct lightning strike analysis method only calculates the trip rate through two-dimensional parameters, the calculation result is not accurate enough, and does not take into account the influence of the three-dimensional structural parameters of the traction network on it, and proposes a high-speed railway A direct lightning analysis method for calculating the projected area of ​​the three-dimensional exposed arc surface of the traction network. Specifically, the present invention is a comprehensive consideration of the three-dimensional structure characteristics of the high-speed railway traction network and the characteristics of lightning activities along the line, and analyzes by establishing a three-dimensional lightning electrical geometric model of the traction network. The method of direct lightning damage risk of different types of gear distances can realize the accurate calculation of the trip rate of direct lightning strikes on high-speed railways, and enhance the pertinence and effectiveness of direct lightning strike protection

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