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Method for evaluating double-track elevated section electrified railway lightning trip-out rate in AT mode

A technology for electrified railways and double lines, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., and can solve the problems of lightning protection design and lightning protection transformation difficulties.

Inactive Publication Date: 2014-03-26
SOUTHWEST JIAOTONG UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

At present, the lightning strike types of electrified railway catenary under AT power supply mode are divided into two types: induced lightning strike (lightning strikes the ground) and shielding strike (lightning strikes positive feeder, catenary cable, contact line). This method of accurately calculating the lightning tripping rate has brought great difficulties to the targeted lightning protection design and lightning protection transformation of electrified railways under the AT power supply mode in my country.

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  • Method for evaluating double-track elevated section electrified railway lightning trip-out rate in AT mode
  • Method for evaluating double-track elevated section electrified railway lightning trip-out rate in AT mode
  • Method for evaluating double-track elevated section electrified railway lightning trip-out rate in AT mode

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Embodiment Construction

[0072] Through the following examples, combined with the attached figure 1 , to further illustrate the technical solution of the present invention.

[0073] The first step is to obtain line parameters. For a double-track elevated section of a railway, the height of the viaduct to the ground is 10m, the height of the positive feeder 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 positive feeder and the inner side of the pillar is 0.8m. The center distance of the running line is 6m, the radius of the positive feeder 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 pillar grounding resistance is 10Ω, and the pillar equivalent The inductance is 6.72μH, the parallel conn...

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Abstract

The invention discloses a method for measuring an electrified railway double-track elevated section contact network lightning trip-out rate in an AT mode. The method comprises the steps of (1) obtaining electrified railway line parameters, (2) determining the influence areas of different lightning types of a contact network and calculating the coordinates of single side lightning type dividing points, (3) calculating a double-track induction lightning trip-out rate, (4) calculating a double-track shielding failure trip-out rate, and (5) determining a double-track 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 in the AT mode is solved.

Description

technical field [0001] The invention relates to a method for measuring the lightning strike tripping rate of the catenary in the double-track elevated section of the electrified railway under the AT power supply mode, in particular to a method based on an electrical geometric model to calculate the lightning strike and tripping rate of the catenary in the double-track elevated section of the electrified railway under the AT power supply mode. The method of tripping rate is suitable for lightning protection design and lightning protection transformation of electrified railway under AT power supply mode, and belongs to the field of railway system overvoltage. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G06Q50/00
Inventor 曹晓斌邓云川林宗良陈纪纲熊万亮
Owner SOUTHWEST JIAOTONG UNIV
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