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

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: 2014-03-26
SOUTHWEST JIAOTONG UNIV
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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 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). These two methods of accurately calculating the lightning tripping rate have brought great difficulties to the targeted lightning protection design and lightning protection transformation of electrified railways under the AT power supply mode in our country.

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

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Embodiment Construction

[0066] Through the following examples, combined with the attached figure 1 , to further illustrate the technical solution of the present invention.

[0067] 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 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, the distance between the positive feeder and the inner side of the pillar is 0.8m, and the radius of the positive feeder is 6.25 mm, insulator U50% discharge voltage 270kV, lightning current wave head time 2.6μs, lightning day 40 days, average operating voltage gradient of insulator string 20.36kV, pillar grounding resistance 10Ω, pillar equivalent inductance 6.72μH, adjacent positive feeder on both sides of the pillar The parallel inductance value is 36.85μH, and the corona correction coefficien...

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Abstract

The invention discloses a method for measuring a single-track elevated section electrified railway lightning trip-out rate in an AT mode. 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 shielding failure trip-out rate, and (5) 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 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 single-line 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 single-line 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 ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G06Q10/04G06Q50/06
Inventor 曹晓斌李瑞芳朱军熊万亮吴广宁周利军高国强
Owner SOUTHWEST JIAOTONG UNIV
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