Rail resonant grounding device

A resonant grounding and steel rail technology, which is applied in the direction of track installation, transportation and packaging, and power oscillators, etc., can solve the problems of heavy switching workload, error-prone, high traffic density, etc.

Active Publication Date: 2017-07-28
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the shunting line is busy, the switching workload is heavy and error-prone
If the AC and DC electrified railways share rails on the actual operating line, due to the high traffic density, it is obviously unrealistic to use a rail grounding switch and operate it manually according to the type of train

Method used

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Embodiment Construction

[0010] The invention is a rail resonant grounding device, which is used in the occasion of shared rails of AC and DC electrified railways. working frequency. How it works see figure 1 For specific instructions. exist figure 1 Among them, G is the rail, capacitor C and inductor L form a series resonant branch, and the resonant frequency is the operating frequency of the AC electrified railway, generally 50Hz or 60Hz. The traction current of the series resonant branch to the AC train is equivalent to a short circuit, which is automatically realized The grounding of the rail, the traction current of the DC train, due to the direct blocking effect of the capacitor, the DC traction current cannot pass through the branch to the ground, so that no stray current will be generated.

[0011] The present invention will be further described below in combination with specific embodiments.

[0012] figure 2 , the capacitor C and the inductor L form an LC series resonance branch with a...

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Abstract

A steel rail resonance grounding device is formed by an LC series connection resonance branch and is used under the occasion where an alternating current electrified railway and a direct current electrified railway share a steel rail. The steel rail resonance grounding device is connected between the steel rail and a grounding grid, and the resonance frequency of the LC series connection resonance branch is equal to the working frequency of the alternating current electrified railway. When an alternating current train runs on the rail, the LC branch arranged in the steel rail resonance grounding device generates series connection resonance which is equivalent to short circuit, steel rail grounding is achieved, and dangerous potential does not occur on the steel rail. When a direct current train runs on the rail, a capacitor in the steel rail resonance grounding device achieves a direct current isolation effect, the steel rail is isolated from the ground, and stray current is not generated. The grounding device does not require manual operation and provides a guarantee for power supply safety of the occasion where the alternating current electrified railway and the direct current electrified railway share the steel rail.

Description

technical field [0001] The invention belongs to the technical field of rail transit traction power supply, and in particular relates to a rail resonance grounding device. Background technique [0002] With the development of main line electrified railways and urban rail transit in China, it is inevitable that some AC and DC electrified railways share rails. This situation is more common on the shunting lines of some rolling stock manufacturers. In order to save land occupation and reduce construction costs, shunting lines often require that a line can not only run AC electric locomotives and EMUs, but also run DC EMUs. Of course, when running trains with different current systems on the line, the catenary or catenary rail power supply is different, but the rails used to support and guide the trains are the same, that is, AC and DC electrified railways share rails. At this time, the AC power supply system generally requires the rail to be grounded in order to limit the poten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60M5/00H03B5/08
Inventor 吴命利杨少兵吴丽然慈明洋李腾
Owner BEIJING JIAOTONG UNIV
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