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Method for Evaluating Lightning Trip Rate of Electrified Railway in Embankment Section of Double Line

A technology of electrified railway and double track, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of electrified railway lightning protection design and lightning protection transformation difficulties

Inactive Publication Date: 2016-12-28
SOUTHWEST JIAOTONG UNIV +1
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  • Abstract
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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 Trip Rate of Electrified Railway in Embankment Section of Double Line
  • Method for Evaluating Lightning Trip Rate of Electrified Railway in Embankment Section of Double Line
  • Method for Evaluating Lightning Trip Rate of Electrified Railway in Embankment Section of Double Line

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Embodiment Construction

[0088] Through the following examples, combined with the attached figure 1 , to further illustrate the technical solution of the present invention.

[0089] The first step is to obtain line parameters. For a double-track embankment section of a railway, 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, and the distance between the return line and the inner side of the pillar is 0.8m. 6m, return line radius 6.25mm, insulator U50% discharge voltage 270kV, lightning current wave head time 2.6μs, lightning day 40 days, insulator string average operating voltage gradient 20.36kV, pillar grounding resistance 10Ω, pillar equivalent inductance 6.72μH, The parallel connection value of the inductance of the adjacent return lines on both sides of the pillar is 36.85μH, and the corona correction coefficient is 1.15.

[0090] Calculation season ...

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Abstract

The invention discloses a method for measuring an electrified railway double-track bank section contact network lightning trip-out rate. 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 back trip-out rate, (5) calculating a double-track shielding failure trip-out rate, and (6) 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 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 embankment section of the double track of the electrified railway, in particular to a method for calculating the tripping rate of the catenary induced lightning strike, counterattack and shielding strike in the embankment section of the double track of the 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 reliabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G06F19/00
Inventor 曹晓斌李瑞芳吴广宁熊万亮朱军周利军高国强高波
Owner SOUTHWEST JIAOTONG UNIV
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