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A Fault Location Method for Fully Parallel AT Traction Network

A technology of fault distance measurement and traction network, which is applied to fault location, fault detection according to conductor type, and electrical measurement, etc., which can solve problems such as poor adaptability and complex implementation

Active Publication Date: 2021-04-13
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current fault location scheme has problems such as complex implementation and poor adaptability

Method used

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  • A Fault Location Method for Fully Parallel AT Traction Network
  • A Fault Location Method for Fully Parallel AT Traction Network
  • A Fault Location Method for Fully Parallel AT Traction Network

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Embodiment Construction

[0071] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0072] In general, the fully parallel AT traction network has 2-3 AT segments. But in the case of cross-regional power supply, etc., the traction network AT segment can reach 4-6. In order to express the generality of the method of the present invention, figure 1 Indicates a fully parallel AT traction network. In the figure, ATP1 represents the traction substation, ATPi (i=2...n, where n≥3) represents the AT station or sub-station, T, R, F represent the contact line, rail, and positive feeder respectively, D i (i=1...n-1) represents the length of each power supply section, QF 2i-1 (i=1...n), QF 2i (i=1...n) represent the bipolar feeder circuit breakers of the upper and lower pavilions, respectively, Respectively represent the circuit breaker QF 2i-1 , QF 2i The T line current flowing through; Respectively represent the circuit breake...

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Abstract

The invention discloses a method for fault distance measurement of a fully parallel AT traction network, comprising the steps of: when a fault occurs, synchronously collect the states of the uplink and downlink bipolar feeder circuit breakers of each kiosk and the current flowing through the circuit breakers, and construct a parallel connection of the traction network State matrix and feeder current matrix; construction of current state matrix and fault state matrix; distance measurement after judging whether the fault section is an uplink and downlink parallel section, or judging whether the fault section is a single-line AT section, or judging the type of fault After ranging. The beneficial effect of the present invention is that the operation mode of the traction network is represented by the switch state matrix, the fault section is identified by the current state matrix and the fault state matrix, and finally the fault distance calculation is realized by three kinds of classification fault distance measurement methods, and the normal power supply operation mode can be realized It has the characteristics of accurate distance measurement and strong applicability.

Description

technical field [0001] The invention relates to an electrified railway traction network technology, in particular to a fault location method for a fully parallel AT traction network. Background technique [0002] The traction network of electrified railway has the characteristics of complex structure and high failure rate. Accurate and reliable fault location is very important for quickly finding fault points, repairing fault lines in time, shortening power outage time and ensuring transportation order. [0003] The power supply operation mode of the fully parallel AT traction network is determined by the opening and closing states of its various switches. In normal power supply operation mode, all traction network switches are closed. However, due to the different power supply requirements of users, some equipment failures or the withdrawal of maintenance and other reasons, some circuit breakers of the traction network will be disconnected, and the traction network is in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08G01R19/10
CPCG01R19/10G01R31/086G01R31/088
Inventor 韩正庆刘淑萍李帅高仕斌沈睿吴海波韦晓广
Owner SOUTHWEST JIAOTONG UNIV
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