Full-parallel AT traction network fault location method

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: 2020-10-20
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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  • Full-parallel AT traction network fault location method
  • Full-parallel AT traction network fault location method
  • Full-parallel AT traction network fault location method

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Embodiment Construction

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

[0072] Generally, the fully parallel AT traction network has 2-3 AT segments. However, in the case of cross-regional power supply, etc., the AT segments of the traction network can reach 4-6. In order to express the versatility of the method of the present invention, adopt as figure 1 Indicates fully parallel AT traction network. In the figure, ATP1 represents the traction substation, ATPi (i=2...n, where n≥3) represents the AT substation or divisional substation, T, R, F represent the contact line, rail, and feeder respectively, and D i (i=1...n-1) indicates the length of each power supply section, QF 2i-1 (i=1...n), QF 2i (i=1...n) represent the double-pole feeder circuit breakers of the uplink and downlink kiosks respectively, Respectively represent the circuit breaker QF 2i-1 , QF 2i The current flowing through the T line; Resp...

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Abstract

The invention discloses a full-parallel AT traction network fault location t method, which comprises the following steps that: when a fault occurs, synchronously acquiring the states of uplink and downlink bipolar feeder circuit breakers of each kiosk and the current flowing through the circuit breakers, and constructing a traction network parallel state matrix and a feeder current matrix; constructing a current state matrix and a fault state matrix; and judging whether the fault section is an uplink and downlink parallel section post-ranging section, or judging whether the fault section is asingle-line AT section post-ranging section, or judging the fault type post-ranging section. The invention has the following beneficial effects: the operation mode of the traction network is characterized 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 classified fault location methods, which can realize the fault location in normal power supply operation mode and various abnormal power supply operation modes. The method has the characteristics of accurate distance measurement, high applicability and the like.

Description

technical field [0001] The invention relates to electrified railway traction network technology, in particular to a method for fault distance measurement of fully parallel AT traction network. Background technique [0002] The electrified railway traction network 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 on-off state of each switch. In normal power supply mode, all traction network switches are closed. However, due to different power supply requirements of users, some equipment failures or maintenance exits, some circuit breakers of the traction network will be in the disconnected state, and the traction network is in an abnormal power supply operation mode at this...

Claims

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Application Information

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Patent Type & Authority Applications(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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