System and method for limiting rail potential of electrified railways in arid regions

A technology for electrified railways and rails, applied to electrical components, circuit devices, emergency protection circuit devices, etc.

Inactive Publication Date: 2013-12-18
LANZHOU JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a method for limiting the rail potential of electrified railways in arid areas, aiming at solving the urgent need to study the influence of high leakage resistance on the potential of electrified railway rails in arid areas, and proposes that in the case of high leakage resistance Next, the problem of the method of reducing the potential of railway rails in arid areas

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  • System and method for limiting rail potential of electrified railways in arid regions

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] figure 1 It is a schematic diagram of the traction return system in the AT power supply mode provided by the embodiment of the present invention. For ease of illustration, only the parts relevant to the present invention are shown.

[0032] Under the AT power supply mode, the railway traction return system consists of six parts: traction substation 1, autotransformer 2, catenary 3, positive feeder 4, protection line 5 and locomotive 6.

[0033] Traction substation 1, using a 55kV AC voltage source model, is connected to autotransformer 2;

[0034] Autotransformer 2, that is, the AT transf...

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Abstract

The invention discloses a system and a method for limiting rail potential of electrified railways in arid regions. The system comprises a traction substation, an autotransformer, a contact net, a positive feeder and a guard wire. A comprehensive grounding system is applied to the railways in the arid regions, a limiting scheme aiming for the rail potential of the electrified railways in the arid regions is provided, and for the railways in the arid regions, the guard line and a rail are sufficiently transversely connected in AT zones to reduce the rail potential; and through ground wires are led in to reduce rail potential in high-leak-resistance regions. For the railways in the arid regions, the guard wire and the rail are sufficiently transversely connect in the AT zones, so that the rail potential can be well reduced; due to leading in of the through ground wires, an effect of reducing the rail potential in the high-leak-resistance regions is obvious.

Description

technical field [0001] The invention belongs to the technical field of railway rails, and in particular relates to a system and method for limiting the potential of electrified railway rails in arid regions. Background technique [0002] With the rapid development and improvement of railway mileage, speed and load capacity in western my country, the electrified traction load current and short-circuit fault current have increased a lot, and the western part of my country is mostly in arid desert areas. Due to its geological structure, natural climate and other reasons, arid areas belong to areas with high soil resistivity. With the increase of train speed, load capacity and locomotive traction power increase, the corresponding traction backflow increases greatly, and the track potential raised. The rise of the rail potential in the electrified railway section will definitely pose a threat to the life safety of equipment and personnel along the line, easily cause malfunction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60M5/00H02H9/04
Inventor 张友鹏张耀王思华徐金阳范小楷任丽苗赵斌
Owner LANZHOU JIAOTONG UNIV
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