Principles of Normalization of the Level of Interference from the Traction Current in the Operation of Automatics and Remote-Controlled Receivers

This paper presents the development of a qualitative and quantitative assessment of the resistance to ground for the electrically continuous negative rails of a medium capacity transit line of the Taipei Rapid Transit System. Using synchronous potential measurements at three stations we examine potential profiles to locate potential rail sections with low resistance to ground qualitatively. Also the voltage sag values are used to quantitatively calculate rail-to-ground resistance per unit length. The approach presented in this paper requires only voltage measurements with the traction current as the energization source. Thus, this approach can be performed as a routine maintenance procedure to obtain rail-to-ground resistance values from a system-wide point of view.

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Features of current distribution in the traction rail network for heavy-haul traffic

Transport of the Urals ◽

10.20291/1815-9400-2021-3-52-58 ◽

2021 ◽

pp. 52-58

Author(s):

Maxim Viktorovich Basharkin ◽

◽

Alevtina Gennadyevna Isaycheva ◽

Keyword(s):

Current Distribution ◽

Current Flow ◽

Dynamic Loads ◽

Automated Systems ◽

Heavy Weight ◽

Rail Network ◽

Traction Current ◽

Heavy Haul ◽

Resistance Value

The paper investigates the limits of change in resistance value of traction rail network elements due to dynamic loads arising during the movement of trains with increased weight and length. An augmented electric diagram of rail joint with a duplicating junction coupler taken into account has been presented. The ways of traction current flow during simultaneous passing of heavy-weight trains along the adjacent track connected by intertrack junctions have been determined. Conclusions have been made about the necessity of constant monitoring of traction rail network elements condition, which can be ensured only by implementing special automated systems.

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Return traction current system’s operation in cold climate regions

MATEC Web of Conferences ◽

10.1051/matecconf/201926502009 ◽

2019 ◽

Vol 265 ◽

pp. 02009

Author(s):

Svetlana Makasheva ◽

Pavel Pinchukov

Keyword(s):

Experimental Study ◽

Current System ◽

Cold Climate ◽

System Model ◽

Asymmetry Coefficient ◽

Traction Current ◽

Scientific Analysis ◽

Current Value ◽

Critical Zones ◽

Electrified Railways

The paper deals the problem of the reverse traction current's asymmetry at the AC electrified railways. The features of return traction current system’s operation under conditions of cold climate are considered. The goal of work is to determinate value of return traction current asymmetry coefficient for cold climate regions operating AC electrified railways. To achieve the goal the methods of scientific analysis, imitation modelling, experimental study are used. Types and rationing of return traction current asymmetry are accented. The return traction current system model is created in Multisim 12.0 software for analyse the degree of various factors influence on the return traction current's asymmetry. Main influencing factors for asymmetry coefficient in cold climate regions as a traction current value and catenary tower resistance are considered. The calculated graphic dependences of the asymmetry coefficient as a function of the traction current and the catenary tower resistance are given. Algorithm for identifying the critical zones (hazardous areas) by graphical dependencies and predicting the system's predicament states is described.

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Calculations of interference from traction current in nonhomogenuous track lines

Automation on Transport ◽

10.20295/2412-9186-2020-6-3-241-267 ◽

2020 ◽

Vol 6 (3) ◽

pp. 241-267

Author(s):

V. I. Shamanov ◽

Keyword(s):

Traction Current

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Second Paper: The Application of an Analogue Computer to a Problem of Pantograph and Overhead Line Dynamics

Proceedings of the Institution of Mechanical Engineers ◽

10.1243/pime_proc_1964_179_049_02 ◽

1964 ◽

Vol 179 (1) ◽

pp. 782-808 ◽

Cited By ~ 3

Author(s):

R. B. Morris

Keyword(s):

Vertical Plane ◽

Analogue Computer ◽

Historical Survey ◽

Mechanical Contact ◽

Railway Systems ◽

High Speeds ◽

Traction Current ◽

Present Information ◽

Potential Success ◽

Electric Traction

Conditions of instability are known to occur in railway overhead current collecting systems during the passage of trains at high speeds. They are manifested as oscillations in the vertical plane of such amplitude as to prevent continuous mechanical contact of the static equipment and the moving collector, thereby causing undesirable interruptions in the supply of electric traction current. An introduction and a brief historical survey precede a short study of the methods of theoretical analysis. It is shown that the completely theoretical approach breaks down because of its complexity, and that simulation by means of an electronic analogue is a way of overcoming the complications. The analogues of the overhead equipment and the collector are treated in detail, as is the task of combining the two under the criteria for their interaction. The simulation is still under development but it is possible to give evidence of the method's potential success. A comprehensive list of references gives details of the world-wide sources of present information from full-scale railway systems.

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Improvement of the traction current asymmetry control system

Nexo Revista Científica ◽

10.5377/nexo.v34i06.13169 ◽

2021 ◽

Vol 34 (06) ◽

pp. 1819-1825

Author(s):

Maksim V. Basharkin ◽

Alevtina G. Isaycheva ◽

Valery B. Teplyakov

Keyword(s):

Control System ◽

Mobile Device ◽

Technical Condition ◽

Transport Infrastructure ◽

Technical Diagnostics ◽

Degree Of Protection ◽

Traction Current ◽

Control Devices ◽

Monitoring Center ◽

High Degree

The article presents approaches that allow modernizing the system for monitoring the asymmetry of the traction current. The existing systems of technical diagnostics and monitoring of the technical condition of automation and telemetry control devices, which have found wide application on the railways of JSC Russian Railways, do not allow monitoring the condition of adjacent railway transport infrastructure systems that affect the performance of railway automation and telemetry control devices. Besides, information about the condition of the object being diagnosed is sent to the monitoring center, while the operational and repair personnel do not have the necessary information and start working only after receiving information about the malfunction from the dispatcher of the monitoring center. The mobile device, proposed in the article, allows reducing the time necessary for obtaining information about the unserviceable condition of the railroad line. The article presents the analysis of gadgets planned for use in a mobile device, and the concept of the interface of the mobile application for technicians. It is noted that the hardware intended for use in a mobile device must provide protection against unauthorized access to the application, as well as have a high degree of protection against penetration. Besides, the article identifies the areas for further improvement of the traction current asymmetry control system.

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