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.

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

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.

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.

scholarly journals Experimental investigation of actual situation of using and accounting of recovered energy of regenerative braking mode at the DC traction system

2019 ◽  
Vol 294 ◽  
pp. 01005
Author(s):  
Oleh Bondar ◽  
Dmytro Ustymenko ◽  
Olena Kurylenko ◽  
Mykhailo Kedria ◽  
Oksana Karzova ◽  
...  
Keyword(s):  
Storage System ◽  
Electric Energy ◽  
Energy Storage System ◽  
Regenerative Braking ◽  
Railway Transport ◽  
Traction Substations ◽  
Supercapacitor Energy Storage ◽  
Electric Traction ◽  
Traction System ◽  
Experimental Researches

This paper deals with the problems of enhancement of registration and distribution of electric energy which can be obtained from DC electric locomotives by the regenerative braking. According to theoretical researches, it is possible to return approximately 8 - 12% of electric energy which is consumed for electric traction by using of a regenerative braking mode. However in recent years for electric traction networks of JSC “Ukrainian Railways”, this index doesn’t exceed 2.6%. So we consider that the regenerative braking is one of the most prospective ways for energy saving in electric railway transport. Results of the experimental researches which were executed on DC traction substations and VL11M6 electric locomotives are described in this paper. Instantaneous values of voltage and current in different modes have been obtained. The electric energy balance for experimental zone has been performed. Also the ways of distribution and consumption of energy of regenerative braking mode have been analyzed. On this basis of the executed investigations, recommendations about providing of supercapacitor energy storage system for Ukrainian railways are proposed.

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.

Simulation of an ac electric locomotive operation in the regenerative braking mode

2021 ◽  
pp. 106-114
Author(s):  
V. S. Tomilov ◽  
Keyword(s):  
Mathematical Modeling ◽  
Energy Savings ◽  
Rolling Stock ◽  
Regenerative Braking ◽  
Contact Network ◽  
Electric Motors ◽  
Electric Locomotive ◽  
Power Circuit ◽  
Electric Rolling Stock ◽  
Train Speed

Regenerative braking is one of the most important energy-saving resources on electric rolling stock (EPS) of railways and feasibility of its use is confirmed by a rich half-century history. The development of the recovery mode begins with the release of the experimental AC electric locomotive of the VL61 series № 012 and continues with the release of the modern series of electric locomotives 2 (3, 4) ES5K and EP1v/i. The use of recuperation allows you to achieve significant energy savings, to ensure the safety of driving heavy trains on the track profile with long descents. In the regenerative braking mode, the EPS has rigid braking characteristics, ensuring maintenance of constant train speed, increasing the technical speed of the train and capacity of the railway section. This article presents the results of mathematical modeling of operation of an AC electric locomotive in the regenerative braking mode using a standard rectifier-inverter converter (RIC) and presence of ballast resistor blocks (BRB) in the power circuit, and using a promising RIC based on IGBT transistors, for which a method for implementing regenerative braking on AC electric locomotives without the use of BRB in the anchor circuit of traction electric motors is developed, with the help of which it is possible to increase the amount of electricity given to the contact network, as well as to expand the area of braking characteristics of the electric locomotive.

scholarly journals Concept of intelligent system for controlling regenerative braking and using recovery energy

2018 ◽  
Vol 239 ◽  
pp. 01039
Author(s):  
Alexander Vilgelm ◽  
Mikhail Nikiforov ◽  
Vasily Cheremisin
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Intelligent System ◽  
Electrical Energy ◽  
Rolling Stock ◽  
Regenerative Braking ◽  
Managerial Decisions ◽  
Electric Rolling Stock ◽  
Traction Power Supply ◽  
Traction Power

The issue of increasing the level of electrical energy recovered by the electric rolling stock and the efficiency of its use at the electrified sections of railways of JSC “Russian Railways” is still topical at present. This issue is considered today in the context of increasing the efficiency of the use of traction rolling stock. Increasing the energy efficiency of the transportation process by increasing the efficiency of recovery can be achieved both by the implementation of organizational decisions and through the introduction of additional equipment in the traction power supply system, for example, installation of reversible converters at traction substations or power storage devices on electric rolling stock and in the system of traction power supply, as well as other technical means, changing the parameters of the operation of sections with mandatory provision of the operability of the regenerative braking systems in the electric rolling stock. To assist in the reasoned adoption of similar and other managerial decisions, it is advisable to create an intelligent system for controlling the processes of applying regenerative braking and using recovery energy. This paper briefly reviews the main results of scientific research on the efficiency of recovery, suggests a mechanism for adapting the methods developed earlier to the system for controlling energy efficiency of recovery processes at the sections of railways.

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