scholarly journals NORMS AND METHODS FOR DETERMINING THE ELECTROMAGNETIC COMPATIBILITY OF MODERN AUTOMATIC LOCOMOTIVE SIGNALING SYSTEMS AND ELECTRIC ROLLING STOCK WITH AN ASYNCHRONOUS TRACTION DRIVE ON THE SUBWAY

2021 ◽  
Vol 7 (4) ◽  
pp. 503-521
Author(s):  
A. G. Kabetsky ◽  
◽  
A. D. Manakov ◽  
Keyword(s):  
Remote Control ◽  
Control Systems ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Speed Control ◽  
Rolling Stock ◽  
Traction Drive ◽  
Signaling Systems ◽  
Electric Rolling Stock ◽  
Traction Current

The article provides a brief overview of the development and application of automatic control systems for subway trains. Modern automatic locomotive signaling systems featuring automatic speed control with signal transmission based on double-phase-diff erence modulation are analyzed. The introduction of electric rolling stock with an asynchronous traction drive and advanced train traffi c automation and remote control systems at the St. Petersburg Metro initiates the drive to ensure their electromagnetic compatibility. For the subway train traffi c automation and remote control systems, there have been no acceptance criteria for electromagnetic interference that occur in their operating range when electric rolling stock with an asynchronous traction drive is put into operation. The article identifi es the main sources of conducted electromagnetic interference and the routes of their penetration into the receive path of automatic locomotive signaling devices with automatic speed control. A method is proposed for determining the limits of hazardous and interfering eff ects (immunity limits) for automatic train signaling systems with automatic speed regulation of the systems of the BARS automatic speed control unit with phase-diff erence modulation and the upgraded PA-M (ПА-М) train automation with phase-diff erence modulation for the St. Petersburg Metro lines. A method is given for the transition from the immunity limits of automatic locomotive signaling systems with automatic speed control to the emission limits of electric rolling stock at diff erent traction current unbalance factors. A technique for measuring traction current at high-potential points on electric rolling stock is considered. A technique for assessing the levels of conducted electromagnetic interference from electric rolling stock by calculating the eff ective value in a sliding window of a pre-fi ltered traction current signal of an electric rolling stock is presented.

Application of bidirectional isolated converters in a traction drive

2020 ◽  
pp. 67-77
Author(s):  
T. S. Titova ◽  
◽  
M. V. Evstaf’yeva ◽  
M. Yu. Izvarin ◽  
◽  
...  
Keyword(s):  
Output Voltage ◽  
Initial Conditions ◽  
Maximum Output Power ◽  
Practical Importance ◽  
Duty Factor ◽  
Rolling Stock ◽  
Maximum Output ◽  
Traction Drive ◽  
Bidirectional Converter ◽  
Electric Rolling Stock

Objective: Analysis of the operation of a bidirectional isolated converter for a direct-current traction drive of electric rolling stock under various load conditions. Methods: Mathematical modeling was applied for the research. The results are presented in the form of mathematical relationships and graphs of currents and voltages. Results: The relationship between the output voltage and the duty factor of a bidirectional isolated converter has been revealed. The converters operation is considered at six characteristic intervals of a full cycle with the following initial conditions: i(t0) < 0, i(t0) = 0, i(t0) > 0. The main dependences of the current in the inductance, the input and output voltage, the shape of the voltage and current curves for different operation modes of a bidirectional converter are given. The duty factor is determined to obtain the maximum output power of the bidirectional converter. Practical importance: The proposed bidirectional isolated converter scheme makes it possible to implement traction and regenerative braking modes for a traction drive of a DC electric rolling stock. The simulation results show that with significant changes in load the system retains the specified characteristics, provides speed

Functional structure of the subway train traffic control system complex

2021 ◽  
Vol 7 (3) ◽  
pp. 343-361
Author(s):  
E. O. Averchenkov ◽  
◽  
L. A. Baranov ◽  
M. A. Shevchenko ◽  
◽  
...  
Keyword(s):  
Energy Consumption ◽  
Remote Control ◽  
Control Systems ◽  
Traffic Safety ◽  
Traffic Control ◽  
Minimum Energy ◽  
Functional Structure ◽  
Normal Operation ◽  
Rolling Stock ◽  
Emergency Situations

The main architectural aspects of metro train traffic control systems are presented. The structure of train traffic control processes is presented with the example of the State Unitary Enterprise “Moscow Metro” and the main tasks that need to be solved to achieve high levels of automation of train traffic control in subways are described. A functional structure of a complex of metro train traffic control systems is presented, covering the levels of organization and planning of train traffic, operational traffic control and direct executive systems. The relationship between objects of automation and remote control of train movement, devices of the operational level and systems of organization and planning of movement are shown. The necessity of re-equipping the metro with means of ensuring transport safety and linking them with traffic control systems such as: means of informing passengers, providing the possibility of promptly informing passengers both during normal operation of the transport system and in case of emergency situations, means of communication “passenger – control center (situation center)” is shown. The latter ensures interaction between passengers and operational personnel of the subway, and if necessary, video surveillance equipment that provides enhanced remote control of the current situation in the interior of rolling stock cars and on platforms. The use of complex systems for controlling the movement of trains in subways increases the efficiency of their use by increasing the throughput and carrying capacity, accurate fulfillment of the traffic schedule and the possibility of its rapid recovery in case of failures. At the same time, traffic safety increases by reducing the likelihood of dangerous train convergence , and also the energy consumption for train traction is reduced due to the choice of energy-optimal train control modes and the optimal distribution of travel time along the line by the criterion of minimum energy consumption for the duration of travel along the tracks

Dynamics of electric rolling stock

2021 ◽  
Author(s):  
Andrey Evstaf'ev ◽  
Mihail Izvarin ◽  
Aleksandr Maznev
Keyword(s):  
Rolling Stock ◽  
Traction Drive ◽  
Electric Rolling Stock ◽  
Spring Suspension ◽  
Railway Rolling Stock

The textbook describes the physical foundations, theory, principles of selection and calculation of the main parameters of spring suspension schemes, discusses the issues of fitting crews into curves, vertical dynamics of the traction drive, the use of coupling weight and vibrations of electric rolling stock. It is intended for the training of certified specialists in the direction of "Railway rolling stock".

scholarly journals ELECTROMAGNETIC COMPATIBILITY OF RES ON RAILWAY

2020 ◽  
pp. 7-22
Author(s):  
Popov V ◽  
Shevchenko A
Keyword(s):  
Communication Networks ◽  
Mobile Communication ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Rolling Stock ◽  
Radio System ◽  
Mobile Communication Networks ◽  
High Level ◽  
Cellular Mobile ◽  
Cellular Mobile Communication

This work reviews the main related problems of electromagnetic compatibility (EMC) of the locomotive radio system GSM-R in modern railway transport. The typical internal electromagnetic interference (EMI), caused by the high density of the equipment layout in the rolling stock, and external electromagnetic interference generated by public cellular mobile communication networks and other radio systems are considered. The results of experiments to determine the parameters of public cellular mobile communication networks along the selected railway section show a rather high level of signals that are EMI for GSM-R and affecting on EMC.

scholarly journals Experimental studies of electromagnetic fields on electric rolling stock

2021 ◽  
pp. 48-58
Author(s):  
N. A. Sergeenkov ◽  
◽  
A. N. Gorskiy ◽  
P. Yu. Vasiliev ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Control Systems ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Electronic Components ◽  
Electric Rolling Stock ◽  
Permissible Levels ◽  
The Magnetic Field ◽  
Electric Train

Objective: To identify the influence of electromagnetic interference of various origins on the func- tioning of electronic components of control systems in electric rolling stock (ERS) and radio commu- nication devices, and the effect of electromagnetic fields (EMF) on humans. To carry out experi- mental studies of the ERS EMF characteristics taken as source data, allowing to assess the need to take appropriate actions to ensure electromagnetic safety. One of such measures is the optimal ar- rangement of electric equipment in the driver’s cabin of an electric locomotive or electric train, which will make it possible to achieve the minimum electric and magnetic field strength values under specified conditions. Methods: Direct measurement of the electromagnetic field characteristics in the driver’s cabin of a new 2ES-5 (2ЭС-5) AC electric locomotive (joint production of Transmashhol- ding JSC, Russia, and Alstom, France), as well as on a 2ES4K (2ЭС4К) DC electric locomotive (driver’s cabin, high-voltage chamber, electric locomotive roof) and an ED4M (ЭД4М) DC electric train (dri- ver’s cabin, train car). In the driver’s cabin, measurements were carried out near the working appa- ratus, near the driver’s and assistant's seats and at frequencies for which the maximum permissible levels have been set. Results: The magnetic field strengths (as having the greatest effect on the func- tioning of the electronic components of the ERS control systems and on the person) in the driver’s cabin of electric locomotives and electric trains were measured at different currents under the fol- lowing conditions: starting, traction, braking in the high-voltage chamber and on the electric locomo- tive roof. Practical importance: The given electromagnetic field characteristics do not exceed the specifications set forth in the regulatory documents of the Russian Federation. However, when trains move, there are bursts of EMF strength values due to transient processes in the power supply sys- tem: on DC ERS, the magnetic field strength in the driver’s cabin reached 100 A/m, the electric field strength — 8,5 kV/m, magnetic induction on the DC electric locomotive roof — 400 μT. These values exceed the maximum permissible levels and require the relevant actions to ensure electromagnetic safety.

scholarly journals CALCULATION OF TRACTION AND ENERGY CHARACTERISTICS ELECTRIC ROLLING STOCK WITH ASYNCHRONOUS TRACTION ELECTRIC DRIVE

2021 ◽  
Vol 1 (38) ◽  
pp. 141-152
Author(s):  
I. Riabov ◽  
S. Sapronova ◽  
V. Tkachenko ◽  
S. Goolak ◽  
R. Keršys
Keyword(s):  
Induction Motor ◽  
Electric Drive ◽  
Rolling Stock ◽  
Power Losses ◽  
Traction Drive ◽  
Energy Characteristics ◽  
Asynchronous Electric Drive ◽  
Traction Electric Drive ◽  
Electric Rolling Stock ◽  
Higher Harmonic

The issue of determining the traction and energy characteristics of electric rolling stock with asynchronous traction drive is considered. It is noted that such rolling stock can work at any point of the traction area, resulting in the need to determine the characteristics of the rolling stock for the entire traction area. The calculation of the characteristics of the traction induction motor, which are the basis for determining the traction and energy characteristics of the electric rolling stock, is considered in detail. A procedure based on the calculation of the replacement circuit of an induction motor is proposed. The calculation of power losses due to higher harmonic voltages and currents is considered. An example of calculation of traction and energy characteristics of an DC electric shunting locomotive with a traction asynchronous electric drive is given.

Modeling the intensity of electrochemical corrosion of rails

2021 ◽  
pp. 22-26
Author(s):  
B. V. Rozhkin ◽  
◽  
E. Yu. Bishler ◽  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Electrochemical Corrosion ◽  
Supply System ◽  
Rolling Stock ◽  
Electric Rolling Stock ◽  
Traction Power Supply System ◽  
Traction Current ◽  
Rail Line ◽  
Traction Power Supply

An increase of train load limits leads to a growth of values of straight and reverse traction currents in traction power supply system. Rails that provide channelling of reverse traction current in direct current power supply system are exposed to electrocorrosion, an intensity of which increases at the growth of traction currents. The aim of the work is to develop an analytical model that will provide a numerical assessment of metal losses from rail base at various modes of electric rolling stock operation and different condition of rail line isolation.

Design and dynamics of electric rolling stock

2021 ◽  
Author(s):  
Andrey Evstaf'ev ◽  
Aleksandr Maznev
Keyword(s):  
Rolling Stock ◽  
Design Features ◽  
Traction Drive ◽  
Electric Rolling Stock ◽  
Spring Suspension

The physical foundations, theory, principles of selection and calculation of the main parameters of spring suspension schemes are presented, the issues of fitting crews into curves, the dynamics of traction drive, the use of coupling weight and vibrations of electric rolling stock, and the design features of modern locomotives are considered. For students and teachers, as well as anyone interested in this topic.

scholarly journals Simulation of the process of current distribution in a traction rail network

2021 ◽  
Vol 2094 (5) ◽  
pp. 052058
Author(s):  
A G Isaicheva ◽  
M V Basharkin ◽  
A L Zolkin ◽  
V N Malikov ◽  
V Saradzheva
Keyword(s):  
Current Distribution ◽  
Heavy Traffic ◽  
Dynamic Loads ◽  
Rolling Stock ◽  
Rail Network ◽  
Traffic Conditions ◽  
Electric Rolling Stock ◽  
Traction Current ◽  
Distribution Process ◽  
Heavy Traffic Conditions

Abstract The article synthesizes a simulation model of a section of a traction rail network, analyzes the norms of permissible asymmetry current, at which a choke-transformer is able to function with a set quality. The simulation of the current distribution process that occurs in the traction rail network during the movement of trains of increased weight and length has been carried out. The graphs of the dependence of the asymmetry current on the traction current consumed by the electric rolling stock have been obtained, and the simulation of the dynamics of changes in the traction current in each of the rail lines has been carried out when the train was moving along a section of the traction rail network. Conclusions about the need to monitor the state of traction rail network elements, the service life of which in heavy traffic conditions is significantly reduced both due to dynamic loads and due to overheating due to the passage of increased traction currents have been made.

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