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Subway train position detection system

A technology for detection systems and trains, applied in the fields of electric vehicles, vehicle parts, railway signals and safety, etc., can solve the problems of electromagnetic field interference, large maintenance, high cost, etc., and achieve improved positioning accuracy, good anti-interference performance, and low equipment cost Effect

Active Publication Date: 2020-07-10
BEIJING JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

[0005] 1. Susceptible to the electromagnetic field interference generated by the traction current, etc., which reduces the positioning accuracy
[0006] 2. The integration process leads to the accumulation of positioning errors, resulting in a large gap between the train positioning results and the actual train position, which needs to be coordinated with the positioning correction plan
[0007] 3. The position detection devices are either too sparse or installed on the whole line, with high cost and heavy maintenance, which cannot meet the train positioning requirements of the negative resistance converter system

Method used

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Embodiment Construction

[0046] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0047] Such as figure 1 , figure 2 The negative resistance converter traction power supply scheme 1 shown above, the subway traction power supply system adopts unilateral power supply, including: traction substation 1, catenary (or contact rail) 3 and running rail 4, negative resistance converter 7, several switch units 8 and the return cable 9, wherein the train 2 obtains energy through the catenary 3, the negative resistance converter 7, several switch units 8, the return cable 9 and the running rail 4.

[0048]The negative terminal 11 of the traction substation 1 is connected to the running rail 4, t...

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Abstract

The invention, which belongs to the technical field of electrified rail transit and power electronic converters, particularly relates to a subway train position detection system which comprises a plurality of position detection units. And the position detection units are used for detecting the dynamic change of a rail pressure drop, comparing magnitudes and products of voltages output by the adjacent position detection units, and further judging the real-time position of the train. The system has the advantages of dynamic real-time train position judgment, simple principle, low cost, small maintenance amount and the like.

Description

technical field [0001] The invention relates to the technical field of electrified rail transit and power electronic converters, in particular to a subway train position detection system suitable for a traction power supply system that reduces the rail potential of a subway train. Background technique [0002] Due to the advantages of high efficiency, environmental protection, lightness and speed, the subway has developed rapidly, and has become one of the effective ways to solve the problem of traffic congestion and achieve sustainable energy development. With the passage of subway operation time, the problems of stray current and track potential become more and more serious. Therefore, in the patent "a system for reducing the potential of subway train tracks", a traction power supply system for reducing the potential of subway train tracks, also known as a negative resistance converter traction power supply system, is proposed to solve such problems. [0003] The negative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61L25/02B60L9/00
CPCB60L9/00B61L25/02
Inventor 杨晓峰郑琼林顾靖达
Owner BEIJING JIAOTONG UNIV
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