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

A technology for electrified railways and embankments, which is applied in the direction of measuring electricity, measuring electrical variables, and forecasting, and can solve problems such as the difficulty of electrified railway lightning protection design and lightning protection transformation

Inactive Publication Date: 2014-03-26
SOUTHWEST JIAOTONG UNIV +1
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  • Abstract
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  • 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 single-track bank section electrified railway lightning trip-out rate
  • Method for evaluating single-track bank section electrified railway lightning trip-out rate
  • Method for evaluating single-track bank section electrified railway lightning trip-out rate

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Embodiment Construction

[0075] Through the following examples, combined with the attached Figure 1 , to further illustrate the technical solution of the present invention.

[0076] The first step is to obtain line parameters. For a railway single-line embankment section, the distance between the return line 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 return line and the inner side of the pillar is 0.8m, and the radius of the return line is 6.25mm. 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 return lines on both sides of the pillar The inductance parallel value is 36.85μH, and the corona correction coefficient is 1.15. Calculation season and a 0 =10,b 0 =0.65; ...

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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. 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 catenary in single embankment section of electrified railway, in particular to a method for calculating the tripping rate of catenary induced lightning strike, counterattack and shielding strike in embankment section of electrified railway based on an electrical geometric model The method is suitable for lightning protection design and lightning protection transformation of electrified railways, 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 evaluate its impact on the reliability of traction power supply, it is often necessary to dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G06Q10/04G06Q50/06
Inventor 曹晓斌吴广宁李瑞芳熊万亮朱军高波周利军高国强
Owner SOUTHWEST JIAOTONG UNIV
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