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Overhead line system fault identification device and method thereof for electrified railway AT power supply system

A technology for electrified railways and power supply systems, which is applied in the direction of fault location and detection of faults according to conductor types, etc., can solve the problems of difficulty in setting up the catenary sectionalizer nearby, burnt contact wires, burn out contact wires, etc., and reduce the scope of power outages. , Improve reliability and facilitate the effect of old line transformation

Active Publication Date: 2018-12-07
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are many mountains and rivers in our country, which often make it difficult to set up the AT station and its catenary segmenter nearby, and even have to open a long distance, some as long as 2km, which requires the AT station and its segment long power lines between
The greater the length of the power supply line and the catenary between the AT station and its sectionalizer, the greater its inductance. When the live train passes through the sectionalizer, the sudden change of the train current between the power supply line and the catenary will cause Overvoltage and arcing, arcing will burn the contact wire, or even burn the contact wire, causing an accident

Method used

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  • Overhead line system fault identification device and method thereof for electrified railway AT power supply system
  • Overhead line system fault identification device and method thereof for electrified railway AT power supply system
  • Overhead line system fault identification device and method thereof for electrified railway AT power supply system

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Embodiment 1

[0026] according to figure 1 and figure 2 As shown, the embodiment of the present invention provides a catenary fault identification device for an AT power supply system of an electrified railway. is an interval, the three AT stations are respectively the left neighbor AT station, the middle AT station and the right neighbor AT station, the fault identification device is arranged in the middle AT station, and the input terminals of the fault recognition device are respectively arranged in parallel with the middle AT station A voltage transformer YHa between the catenary T and the rail R, a voltage transformer YHb installed in parallel between the catenary T where the middle AT is located and the rail R, the left adjacent AT station, and the middle AT The test terminal of the station and the right neighbor AT station is connected, and its output terminal is respectively connected with the control terminals of the left neighbor AT station, the middle AT station and the right n...

Embodiment 2

[0035] according to image 3 As shown, the embodiment of the present invention provides a catenary fault identification method for an electrified railway AT power supply system. The specific steps of the catenary fault identification method are as follows:

[0036] Compare the relationship between the voltage value measured by voltage transformer one YHa or voltage transformer two YHb and the state threshold;

[0037] If the voltage measured by voltage transformer 1 YHa or voltage transformer 2 YHb is lower than the state threshold, there is a fault in the catenary of the electrified railway AT power supply system; if the voltage measured by voltage transformer 1 YHa or voltage transformer 2 YHb is equal to or greater than the state threshold, then there is no fault in the catenary of the electrified railway AT power supply system. In the embodiment of the present invention, the state threshold means that the catenary voltage drops to a voltage value that makes the train unab...

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Abstract

The invention discloses an overhead line system fault identification device and a method thereof for an electrified railway AT power supply system and belongs to the technical field of alternating current electrified railway traction power supply measurement and control. An input end of the fault identification device is connected to test ends of a voltage transformer, a left adjacent AT station,an intermediate AT station, and a right adjacent AT station; the voltage transformer is connected in parallel between an overhead line system in which the intermediate AT station is positioned and steel rails; an output end of the fault identification device is connected to control ends of the left adjacent AT station, the intermediate AT station, and a right adjacent AT station; control ends of the intermediate AT include a control end of a bypass short circuiting device connected in parallel in the overhead line system where the intermediate AT is located. Therefore, the overhead line systemfault identification device and the method thereof disclosed in the present invention can help timely discover, distinguish, and isolate various overhead line system faults and calibrate specific locations of the faults; that a faultless section continues to supply power can be ensured, a power outage range can be reduced to a maximum degree, expansion of impacts caused by the faults can be prevented, and reliability of traction network power supply can be further improved.

Description

technical field [0001] The invention belongs to the technical field of traction power supply measurement and control for AC electrified railways. Background technique [0002] Compared with the direct power supply method, the AT power supply method of the electrified railway has stronger power supply capacity and longer power supply arm length, which can reduce electric phase separation and dead zones. Therefore, almost all high-speed railways in my country choose the AT power supply method. [0003] However, there are many mountains and rivers in our country, which often make it difficult to set up the AT station and its catenary segmenter nearby, and even have to open a long distance, some as long as 2km, which requires the AT station and its segment Long power supply lines between devices. The greater the length of the power supply line and the catenary between the AT station and its sectionalizer, the greater its inductance. When the live train passes through the sectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086Y04S10/52
Inventor 李群湛易东陈民武
Owner SOUTHWEST JIAOTONG UNIV
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