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

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

Inactive Publication Date: 2014-03-26
SOUTHWEST JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0065] Through the following examples, combined with the attached figure 1 , to further illustrate the technical solution of the present invention.

[0066] The first step is to obtain line parameters. For a railway single line embankment section line, the distance between the positive feeder and the ground is 8m, the height of the catenary cable to the ground 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, the radius of the positive feeder is 6.25mm, and the insulator U50% The 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 inductance parallel connection value of the adjacent positive feeder on both sides of the pillar i...

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Abstract

The invention discloses a method for measuring an electrified railway single-track bank section contact network 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 present invention relates to a method for measuring the lightning strike tripping rate of catenary section catenary in single-line embankment section under AT power supply mode of electrified railway, in particular to a calculation method based on electrical geometric model for inductive lightning strike in catenary section of single-line embankment section under AT power supply mode of electrified railway , The method of shielding tripping rate is applicable to the lightning protection design and lightning protection transformation of electrified railways under the 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 suppl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G06Q10/04G06Q50/06
Inventor 曹晓斌邓云川林宗良陈纪纲熊万亮李瑞芳朱军吴广宁周利军高国强
Owner SOUTHWEST JIAOTONG UNIV
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