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Fault locating method and system for multiple branch lines of electric railway

A technology for electrified railways and branch lines, which is applied to the fault location, detects faults according to the type of conductor, and measures electricity and other directions to achieve the effect of shortening the recovery time of power supply

Active Publication Date: 2019-09-17
NARI NANJING CONTROL SYST
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  • Description
  • Claims
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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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  • Fault locating method and system for multiple branch lines of electric railway
  • Fault locating method and system for multiple branch lines of electric railway
  • Fault locating method and system for multiple branch lines of electric railway

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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 locating method and system for multiple branch lines of an electric railway. Field collection units are installed on all branch lines including phase splitting lines and multiple branch lines of a hub station; startup of the field collection unit is determined according to line current collected in real time of a position where the field collection unit is and a line-to-ground field; a started field collection unit collects fault current of a branch line in which the started field collection unit is, but fault current of a non-started field collection unit is zero; and a position of a branch line with the fault is determined according to a distribution characteristic of fault current of each branch line, and faults of multiple branch lines are located accurately by using a reactance method. The method and system provide reliable basis for fault correction of the electric railway branch lines, and shorten power supply restoration 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 Applications(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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