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Dynamic simulation device for track potential and stray current of direct-current traction system

A DC traction and stray current technology, which is applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., to achieve the effect of less number of devices, low cost, and good practical engineering application value

Active Publication Date: 2019-02-22
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technical scheme realizes the simulation of the stray current and track potential under the direct grounding of the negative pole of the DC traction substation, which is inconsistent with the suspension grounding commonly used in DC traction power supply systems in my country

Method used

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  • Dynamic simulation device for track potential and stray current of direct-current traction system
  • Dynamic simulation device for track potential and stray current of direct-current traction system
  • Dynamic simulation device for track potential and stray current of direct-current traction system

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Embodiment Construction

[0058] 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.

[0059] Such as figure 1 As shown, the DC traction system track potential and stray current dynamic simulation device according to the present invention includes: a train operation unit A, a head-end unit B, an extension unit C, and a first grounding unit D 1 and the second ground unit D 2 ;

[0060] The first ground unit D 1 and the second ground unit D 2 All belong to the grounding unit;

[0061] The first connection terminal 101 of the train operation unit A is connected to the train 6, forming an input terminal O of the traction current;

[0062] The second connection terminal 102 of the train ope...

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Abstract

The invention, which belongs to the field of electrified rail transit, relates to a dynamic simulation device for the track potential and stray current of a direct-current traction system. The dynamicsimulation device comprises a train running unit, a head end unit, an expansion unit and a grounding unit. According to the invention, track potentials and stray currents of the direct-current traction system are simulated dynamically by using a power electronic device when a train is on different operating conditions and stray current and track potential monitoring points are provided. Dynamic simulation of track potentials and stray currents of the direct-current traction power supply system under various grounding modes like a direct negative electrode grounding mode, a suspending grounding mode or a grounding mode after serial diode connection is realized. The dynamic simulation device has advantages of low cost and high simulation degree; an experimental debugging platform can be provided for the track potential and stray current suppressing device. The device has the broad application prospect and great economic value and has the important significance in controlling and preventing the track potentials and stray currents in the direct-current traction power supply system.

Description

technical field [0001] The invention belongs to the field of electrified rail transit, and relates to a dynamic simulation device for rail potential and stray current of a DC traction power supply system. Background technique [0002] With the development of urbanization, rail transit with large capacity plays an increasingly important role in modern metropolises. According to data released by the China Urban Rail Transit Association, as of December 31, 2017, a total of 5,022 kilometers of urban rail lines have been built and put into operation in 34 cities in China, of which light rail and subway accounted for 82%. Obviously, urban rail transit has become an inseparable part of national economic development and improvement of people's lives. [0003] At present, subways and light rails generally adopt DC traction power supply systems. The current required by the train is provided by the traction substation, which sends power to the train through the catenary, and returns ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 杨晓峰徐杰郑琼林
Owner BEIJING JIAOTONG UNIV
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