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Method for evaluating lightning strike tripping rate of electrified railway in single-track elevated section

A single-line technology for electrified railways, applied in the direction of measuring electricity, measuring electrical variables, forecasting, etc., can solve problems such as lightning protection design and lightning protection transformation difficulties for electrified railways

Inactive Publication Date: 2016-12-07
SOUTHWEST JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the lightning strike types of electrified railway catenary are divided into three types: induction lightning (lightning strikes the ground), counterattack (lightning strikes the return line, the top of the pillar and other grounded parts), and shielding strikes (lightning strikes the catenary cable, contact line). The accurate calculation of the three lightning tripping rates of railways has brought great difficulties to the targeted lightning protection design and lightning protection transformation of my country's electrified railways.

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  • Method for evaluating lightning strike tripping rate of electrified railway in single-track elevated section
  • Method for evaluating lightning strike tripping rate of electrified railway in single-track elevated section
  • Method for evaluating lightning strike tripping rate of electrified railway in single-track elevated section

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Embodiment Construction

[0076] Through the following examples, combined with the attached figure 1 , to further illustrate the technical solution of the present invention.

[0077] The first step is to obtain line parameters. For a single-track elevated section of a railway, the height of the viaduct is 10m, the height of the return line to the viaduct deck is 8m, the height of the catenary cable to the viaduct deck is 7.8m, the distance between the catenary cable and the inner side of the pillar is 3m, and the distance between the return line and the inner side of the pillar is 0.8m. The line radius is 6.25mm, the insulator U50% discharge voltage is 270kV, the lightning current wave head time is 2.6μs, the lightning day is 40 days, the average operating voltage gradient of the insulator string is 20.36kV, the grounding resistance of the pillar is 10Ω, the equivalent inductance of the pillar is 6.72μH, and the phase The parallel connection value of the inductance adjacent to the return line is 36.85...

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Abstract

The invention discloses a method for measuring an electrified railway single-track elevated section lightning trip-out rate. The method comprises the steps of (1) obtaining electrified railway line parameters, (2) calculating the coordinates of lightning type dividing points and determining the influence areas of different lightning types of a contact network, (3) calculating an induction lightning trip-out rate, (4) calculating a back trip-out rate, (5) calculating a shielding failure trip-out rate, and (6) determining a total trip-out rate. The method is convenient to calculate, and a problem of the difficult calculation of the electrified railway lightning trip-out rate is solved.

Description

technical field [0001] The present invention relates to a method for measuring the lightning strike tripping rate of the catenary in the single-line elevated section of the electrified railway, in particular to a method for calculating the tripping rate of the catenary induced by lightning, counterattack and shielding in the single-line elevated section of the electrified railway based on an electrical geometric model. It is suitable for lightning protection design and lightning protection transformation of electrified railways, and belongs to the field of overvoltage of railway systems. Background technique [0002] The lightning tripping of the traction power supply system has seriously affected the safe and stable operation of my country's electrified railways. In order to ensure the reliability of train operation, accurately calculate the lightning tripping rate of the catenary power supply line, and evaluate its impact on the reliability of traction power supply, it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G06Q10/04G06Q50/06
Inventor 曹晓斌周利军李瑞芳吴广宁熊万亮朱军高国强高波
Owner SOUTHWEST JIAOTONG UNIV
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