Prospects of improving technical and economic indicators of electric rolling stock

2020 ◽  
pp. 57-64
Author(s):  
Alexander Sergeevich Maznev ◽  
◽  
Alexander Alexandrovich Kiselev ◽  
Vladimir Аndreevich Usov ◽  
Аnnа Аndreevna Kalinina ◽  
...  
Keyword(s):  
Direct Current ◽  
Economic Indicators ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Traction Motors ◽  
Electric Rolling Stock ◽  
Instantaneous Values ◽  
Autonomous Voltage Inverter ◽  
Pulse Regulation ◽  
Technical And Economic Indicators

The paper considers methods of improving technical and economic indicators of direct current electric rolling stock. The authors propose a scheme of electric drive with pulse converters that are controlled by instantaneous values of armature and exciting currents. The scheme provides the realization of regenerative and resistance braking on almost the entire speed range. The paper also presents frequency characteristics of converters at speed from 5 to 100 km/h and proposes a scheme of direct current electric locomotive with pulse regulation of voltage on three connections of traction motors. Moreover, the authors discuss a structure of autonomous voltage inverter with group switching and reduced number of fully controlled semiconductor devices and present methods to prevent wheelspin through changing their load on rails and excitement of traction motors.

Improvement of the current-limiting devices of collector traction motors of direct-current electric rolling stock

2017 ◽  
Vol 88 (10) ◽  
pp. 661-665 ◽  
Author(s):  
A. S. Maznev ◽  
A. B. Nikitin ◽  
I. M. Kokurin ◽  
A. M. Kostrominov ◽  
E. I. Makarova
Keyword(s):  
Direct Current ◽  
Rolling Stock ◽  
Traction Motors ◽  
Electric Rolling Stock ◽  
Current Limiting

scholarly journals Locomotive operation mode - the basis for developing the requirements for the energy storage device on railway transport

2018 ◽  
Vol 239 ◽  
pp. 01004
Author(s):  
Andrey Shatokhin ◽  
Alexandr Galkin
Keyword(s):  
Energy Storage ◽  
Direct Current ◽  
Electric Energy ◽  
Rolling Stock ◽  
Storage Device ◽  
Contact Network ◽  
Energy Storage Device ◽  
Electric Energy Storage ◽  
Operation Modes ◽  
Electric Rolling Stock

Increasing the efficiency of cargo transportation by rail is not only one of the main directions of the company JSC “Russian Railways” but also one of the main tasks of our country in order to achieve sustainable economic growth. Electric rolling stock is the largest consumer of electric energy in the company, that’s why its effective and failure-free operation is the way to solve the set tasks. The paper deals with studies related to the operation modes of a freight electric rolling stock of direct current for the purpose of determining the requirements for electric energy storage device, since it is the electric rolling stock that determines the daily schedule of electric load. The order of the analysis of experimental trips of freight electric locomotives of a direct current on the basis of cartridges of recorders of traffic parameters installed on the locomotive is determined. On the basis of the analysis of conducted trips, the main requirements for the energy storage device were obtained with a single running of electric DC rolling stock, namely the average duration of the operation modes of the electric locomotive, the maximum, minimum, and average values of voltage and current, the average value of the electric energy returned to the contact network, time of charge/discharge, and the useful energy intensity of the electric energy storage device. The studies were carried out with the support of the Russian Foundation for Basic Research for the project No 17-20-01148 ofi_m_RZD/17.

scholarly journals Electromagnetic processes of charging of on-board supercapacitor storage system during the regenerative braking mode of DC electric rolling stock with series-wound DC motors

2018 ◽  
Vol 180 ◽  
pp. 02007
Author(s):  
Anatolii Nikitenko
Keyword(s):  
Initial Conditions ◽  
Storage System ◽  
Rolling Stock ◽  
Regenerative Braking ◽  
Dc Motors ◽  
Traction Motors ◽  
Electric Rolling Stock ◽  
Electromagnetic Processes ◽  
Multiple Unit ◽  
Experimental Researches

The paper is dedicated to the task of improving of regenerative braking of a DC train with the series-wound DC traction motors. It is proposed the schematic solution for the trains with DC motors, which is based on the storing of recovered energy by the on-board supercapacitor storage system and extending the speed range of regenerative braking. The scheme is described by expressions which allowed to build the time dependences of main values. In addition, the experimental researches with the multiple-unit train were performed to find initial data for calculations and verification the results. The transient processes of charging are analyses for different cases of storage capacitances, residual voltages and initial speed of braking. It was proved, that the scheme allows to increase the value of recovered energy up to 40%, but its value strongly depends on the initial conditions and parameters of the system.

Electric apparatus and circuits of rolling stock

2020 ◽  
Author(s):  
Aleksandr Maznev ◽  
Oleg Shatnev
Keyword(s):  
Professional Education ◽  
Rolling Stock ◽  
Educational Institutions ◽  
Technical Data ◽  
Traction Motors ◽  
Semiconductor Converters ◽  
Electric Rolling Stock ◽  
Railway Workers ◽  
Element Base ◽  
Electrical Apparatus

Provides information about technical data and design of electrical apparatus of control, monitoring and protection of traction motors of electric rolling stock (EPS), the principles of speed control of locomotives and trains with contactor-resistor and semiconductor converters based on modern element base, a circuit diagram of various types of EPS with manifold and induction motors in modes of traction and braking. For students of institutions of secondary professional education. It may be useful to students of higher educational institutions, courses of improvement of qualification, the railway workers related to the maintenance and repair of rolling stock.

Influence of wear of traction transmission elements on life of drives of freight electric locomotives

2021 ◽  
pp. 61-63
Author(s):  
Alexander Petrovich Buynosov ◽  
◽  
Alexander Takhirovich Sharapov ◽  
Keyword(s):  
Direct Current ◽  
Gear Transmission ◽  
Dynamic Loads ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Bolted Connections ◽  
Structural Scheme ◽  
Traction Drive ◽  
High Dynamic ◽  
Gear Wheels

At operation of rolling stock all friction joints are supposed to wear especially heavy-loaded elements of freight electric locomotives. The paper analyses the distribution of failures according data of unplanned repairs and determines that a traction drive is a heavy-loaded element. The work shows its structural scheme and considers the influence of wear of traction transmission elements on drive life. The authors have processed and analysed spectrograms of a direct current freight electric locomotive. As a result, they have concluded that the reason of high dynamic loads on traction drive elements is the wear of gear wheels teeth that leads to appearance of cracks on body structures and to weakening of bolted connections. The authors propose a number of principled approaches to reduce the wear of gear transmission and body structures.

scholarly journals Electrodynamics of Reactive Power in the Space of Inter-Substation Zones of AC Electrified Railway Line

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3510
Author(s):  
Mykola Kostin ◽  
Anatolii Nikitenko ◽  
Tetiana Mishchenko ◽  
Lyudmila Shumikhina
Keyword(s):  
Electromagnetic Fields ◽  
Electromagnetic Waves ◽  
Reactive Power ◽  
The Body ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Railway Line ◽  
Frontal Part ◽  
Electric Rolling Stock ◽  
Electric Traction

In railway traction, the definition of “electromagnetic field” is functionally connected to the concept of the reactive power consumed by the electric rolling stock, and characterized by the running and standing electromagnetic waves in the space of the inter-substation zones from the site of the AC traction system. Such a definition is established and theoretically justified by the theory of electromagnetic fields. This article uses the methodology of this theory, in particular, a method for power balance estimation in electromagnetic fields based on Maxwell’s equations, as well as methods for the analysis of running and standing electromagnetic waves based on the theory of reflection, propagation and transmission of plane harmonic waves. The research considers the regularities of standing electromagnetic waves in the space of inter-substation zones of electric traction systems, which occur due to the incomplete reflection of incident waves from the contact wire and metal parts of the roof surface and the frontal part of the body of the electric rolling stock. The flow of electricity to the roof surface and the frontal part of the body of an electric locomotive is considered. The possibility of using existing methods to reduce wave reflections and thereby to effectively compensate for reactive power in the space of inter-substation zones is discussed.

scholarly journals Comparative research of electrical energy transformation processes in locomotive traction drives with asynchronous motors and series-wound brushed DC motors

2021 ◽  
Vol 2131 (4) ◽  
pp. 042079
Author(s):  
A A Zarifyan ◽  
N V Talakhadze
Keyword(s):  
Electric Energy ◽  
Electrical Energy ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Experimental Data Processing ◽  
Dc Motors ◽  
Traction Motors ◽  
Asynchronous Motors ◽  
Traction Drives ◽  
Transformation Processes

Abstract An estimate of the Russian railways expenses level for the purchase of fuel and energy resources is given. It is shown the costs for the purchase of electric energy for train traction account for more than half of the total costs. In this regard, the problem of increasing the traction rolling stock energy efficiency seems certainly relevant. The diagram of voltage and current measurements at the primary winding of the AC cargo electric locomotive transformer is given. The experimental data processing algorithm is proposed. A comparative analysis of the results obtained for electric locomotives with series-wound brushed DC motors (throughout what follows will be denoted as BTMs) and asynchronous traction motors (will be denoted as ATMs) showed that the power factor of the asynchronous drive is higher: 0.99, compared to 0.65 for the drive with BTMs; and the coefficient of nonlinear current distortions is only 0.15, compared to 0.53 for the BTMs. The conclusion is made about higher efficiency of electric energy conversion process in asynchronous traction drive in trust mode.

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 THE STUDY OF TECHNICAL AND ECONOMIC INDICATORS OF TRAM ENTERPRISES FUNCTIONING IN UKRAINE

2021 ◽  
Author(s):  
Oleksii Palant ◽  
Arsen Dzhabrailov
Keyword(s):  
Public Transport ◽  
Balance Sheet ◽  
Integrated Approach ◽  
The State ◽  
Economic Indicators ◽  
Rolling Stock ◽  
Passenger Transportation ◽  
Transport Services ◽  
Operational Activities ◽  
Technical And Economic Indicators

The existing problem of low profitability of passenger transportation, which is common for all public transport utilities, also has some common reasons that gave rise to them. The economic and management problems of the industry multiplied by the unsatisfactory level of transport services quality determine its low competitiveness. The article considers the groups of indicators determining the economic condition of the enterprises under consideration. These include: the state of the rolling stock inventory, the age of tram cars on the balance sheet of enterprises, the state of the tram infrastructure, as well as financial indicators. The article describes in detail the volume of passenger traffic over the past 10 years and changes in the balance of income and expenses of tram enterprises in the country. For the first time, the analysis of indicators of the efficiency of financial and operational activities of tram enterprises in the country has been made. Both the technical and economic level of a component of urban public transport – tram enterprises, and economic and technical factors influencing their crisis state has been determined. It is concluded that for the complete, timely and high-quality satisfaction of the people’s need for transportation, tram enterprises need to focus on improving their own technical and economic indicators taking into consideration the quality of the services provided and the safety of passenger transportation. Despite some positive shifts (extensive modernization of used tram cars, good prospects for establishing the production of domestic trams, repair and reconstruction of tram tracks and energy facilities, and others), the industry is still in a deep crisis, and only an integrated approach to solving urgent problems will allow the industry to reach a break-even level in the future. A comprehensive solution to the problems of improving the technical and economic indicators of tram enterprises functioning is an important component of improving the quality, safety and reliability of transport services for the residents of our cities, will make cities and towns of Ukraine safer places from the environmental point of view.

Classifi cation of factors aff ecting the power consumption of electric rolling stock

Innotrans ◽  
2020 ◽  
pp. 61-66
Author(s):  
Alexander A. Baklanov ◽  
◽  
Kirill I. Domanov ◽  
Nikolay V. Esin ◽  
Stanislav G. Istomin ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Balance ◽  
Power Consumption ◽  
Rolling Stock ◽  
Individual Factors ◽  
Electric Locomotive ◽  
Factors Affecting ◽  
Correct Method ◽  
Electric Rolling Stock

The principles and criteria for classifying factors that affect the power consumption of a train with an electric locomotive are formulated. Based on the analysis of the energy balance, the interconversions of various types of energy and the energy diagrams that characterize them in different modes of train movement are considered. The analysis made it possible to identify the factors that affect the power consumption of the train in all modes of movement, and evaluate them according to various criteria. A classification of factors affecting the train power consumption is proposed, which allows us to justify the correct method of accounting for each factor, as well as to develop measures to reduce the influence of individual factors on the train energy consumption.

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