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A fault location method and system suitable for electrified railway multi-branch lines

A technology for electrifying railways, branch lines, applied to fault locations, detecting faults by conductor type, measuring electrical direction

Active Publication Date: 2021-05-18
NARI NANJING CONTROL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a fault location method and system suitable for electrified railway multi-branch lines, to solve the above-mentioned multiple defects or one of the defects caused in the prior art

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  • A fault location method and system suitable for electrified railway multi-branch lines
  • A fault location method and system suitable for electrified railway multi-branch lines
  • A fault location method and system suitable for electrified railway multi-branch lines

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0042] This embodiment provides a fault location method suitable for multi-branch lines of electrified railways, including the following steps:

[0043] A: Install the local collection unit;

[0044] On-site collection units are installed on the phase-splitting lines near the network points of each traction substation and divisional substation, each branch line of the hub station, and at the entrance throat and exit of the branch line of the hub station to collect real-time The current and the line-to-ground electric field at the location of the ground collection unit.

[0045] B: The on-site acquisition unit collects the line current Ii and the line-to-ground electric field Ui, and performs t...

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Abstract

The invention discloses a fault location method and system suitable for multi-branch lines of electrified railways. By installing on-site acquisition units on each branch line, including phase-splitting lines and hub station multi-branch lines, each on-site acquisition unit can be collected according to real-time The current of the line at the location and the line-to-ground electric field are used to determine the start-up of the local collection unit. The activated local collection unit collects the fault current of the branch line where it is located, and the fault current of the non-started local collection unit is zero; according to each branch The distribution characteristics of the fault current of the line, determine the location of the branch line where the fault point is located, and use the reactance method to accurately locate the fault of the multi-branch line, provide a reliable basis for the fault repair of the electrified railway branch line, and shorten the power supply recovery time.

Description

technical field [0001] The invention relates to a fault location method and system suitable for electrified railway multi-branch lines, belonging to the technical field of electrified railway traction power supply. Background technique [0002] At present, the special fault location device used in domestic high-speed railways and passenger dedicated lines is aimed at the line with no bifurcation of the catenary on the power supply arm, that is, the fault location accuracy of the single-line single-branch catenary or the double-line double-branch catenary line is very high. The error is generally in the range of ±500 meters, but when the fault point occurs in a multi-branch hub station, the ranging accuracy is not high, and manual inspection can only be used to find the location of the fault point. Such as figure 1 As shown, in some large hub stations, due to the large number of branch tracks, the method of manual inspection consumes a lot of manpower, and it takes a long ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088
Inventor 王丹覃曦佟英杰
Owner NARI NANJING CONTROL SYST
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