Transient Stochastic Processes in Power Circuits of Electric Transport Systems

2019 ◽  
Author(s):  
Mykola Kostin ◽  
Tetiana Mishchenko ◽  
Vitalii Liashuk ◽  
Oksana Hoholyuk ◽  
Petro Stakhiv
Keyword(s):  
Stochastic Processes ◽  
Transport Systems ◽  
Electric Transport ◽  
Power Circuits

scholarly journals ROLE OF TRAM TRANSIT IN FORMATION OF MAGNITOGORSK TRANSPORTATION SYSTEM (1930–1955)

2020 ◽  
Vol 17 (5) ◽  
pp. 316-325
Author(s):  
M. N. Potemkina ◽  
M. V. Gryaznov ◽  
T. G. Pashkovskaya ◽  
E. A. Timofeev
Keyword(s):  
Soviet Union ◽  
Transport System ◽  
Urban Transport ◽  
Political Life ◽  
Information Support ◽  
Transport Systems ◽  
Electric Transport ◽  
Route Network ◽  
Time Period

The article provides information about the state of Magnitogorsk electric transport during its formation. This is one of the steps to preserving the history of emergence and development of tram traffic, an attempt to outline its fundamental role in formation of the transport system, as well as in socio-economic and political life of Magnitogorsk, one of the first so called social cities of the Soviet Union. The article is structured into sections relating to expansion of the tram route network, state and development of tram fleet. The considered time period captures the years of the Great Patriotic War and is limited to the beginning of the «thaw» in the domestic political life of the Soviet state. Through systematization of documentary evidence, the fundamental role of tram traffic in formation of the transport system of Magnitogorsk for the studied time period is determined. This should contribute to development of information support for research on the historical patterns of formation of urban transport systems in the period of industrialization.This issue offers the first part of the article.

Spatial interaction of electric transport networks in Russian cities

2020 ◽  
pp. 110-121
Author(s):  
P. S. Stepanov
Keyword(s):  
Transport System ◽  
Spatial Interaction ◽  
Large City ◽  
Transport Systems ◽  
Light Rail ◽  
Electric Transport ◽  
Passenger Traffic ◽  
Mode Of Transport ◽  
The City

The transport systems of the largest cities in Russia usually include extensive tram and trolleybus networks. There are subways in seven million-plus cities. Thus, electric transport has a very significant role in the passenger traffic of these cities. Moreover, the mentioned elements of the electric transport system can influence each other in different ways, and the level of their spatial interaction can also differ. For example, in global practice, there are cases when most types of public transport in the city (bus, trolley, tram, minibus, etc.) are feeders to subway lines, which are usually the key mode of transport within the integrated transport system of a large city (in In some cases, the role of the subway can be performed by a light rail). In addition, tram and trolleybus can be integrated in different ways. Diverse factors and processes taking place inside the city can influence the level of this integration: replacing one mode of transport with another, shortening the lines of one of the modes of transport, etc. Various options for such interaction are described by the example of three Russia’s cities: Kazan, Samara and St. Petersburg.

scholarly journals Economic efficiency of increasing the reliability of electric transport in urban transport systems

2021 ◽  
Vol 1111 (1) ◽  
pp. 012035
Author(s):  
M K Chernyakov ◽  
K Ch Akberov ◽  
B V Malozyomov ◽  
V Yu Listkov ◽  
I Yu Kharlamova ◽  
...  
Keyword(s):  
Economic Efficiency ◽  
Urban Transport ◽  
Transport Systems ◽  
Electric Transport

scholarly journals Rational distribution of excess regenerative energy in electric transport systems on the basis of fuzzy logic application

2017 ◽  
Vol 42 (2) ◽  
pp. 53-63 ◽  
Author(s):  
Oleg Sablin ◽  
Valeriy Kuznetsov ◽  
Victor Shinkarenko ◽  
Alexander Ivanov
Keyword(s):  
Fuzzy Logic ◽  
Power Supply ◽  
Output Voltage ◽  
Voltage Regulators ◽  
Transport Systems ◽  
Electric Transport ◽  
Traction Substation ◽  
External Power ◽  
Regenerative Energy ◽  
Supply Systems

Purpose. To develop the fuzzy model of distribution of excess regenerative energy in traction and external power supply systems allowing to exercise effective operation of the power equipment. Relevance. For effective distribution of excess regenerative energy in systems of electric transport, as well as for systems equipped with stationary stores of energy and inverting traction substations with regulators of output voltage it is necessary to solve a number of the problems with high degree of uncertainty demanding taking into account a set of random factors such as the modes of power lines and traction loadings. These factors have to be considered in operation for choosing the rational modes of energy stores, inverters and regulators of voltage on buses of substations to provide the rational conditions for energy regeneration on electric transport. Scientific novelty. The control system of energy storage devices, inverters and traction substation output voltage regulators, designed on the basis of fuzzy logic, can provide the necessary conditions for the regeneration on electric transport on sections with a shortage of traction power consumption and allows to optimize the distribution of excess braking energy of transport vehicles. It is achieved by determining the rational relationship between the components of the excess current of regeneration in real time, which can ensure a minimum of power losses of regenerative energy in traction and external power supply systems. Practical importance. The use of the developed approach is effective under the conditions of incomplete information received by measurement systems and on the basis of additional studies it can allow to minimize rated capacity of stores, inverters and traction substation output voltage regulators that could reduce the costs of modernization of existing sections and electrification of new electric transport systems.

scholarly journals The principle of creating a "smart" electricity meter in electric traction networks with stochastic electromagnetic processes

2021 ◽  
Vol 11 (1) ◽  
pp. 12-19
Author(s):  
Mykola Kostin ◽  
◽  
Tetiana Mishchenko ◽  
Oksana Hoholyuk ◽  
◽  
...  
Keyword(s):  
Reactive Power ◽  
Operation Mode ◽  
Power Grids ◽  
Transport Systems ◽  
Rolling Stock ◽  
Electric Transport ◽  
Smart Meters ◽  
Electric Networks ◽  
Accuracy Class ◽  
Electric Traction

Voltage and current are sharply variable random (stochastic) processes in traction networks of DC electric transport systems. As a result, electronic and hybrid electricity meters used in electric systems measure electric power with a large relative error that significantly exceeds that of their accuracy class. In this paper the principle of developing smart meters for accounting the electricity transmitted from traction substations to electric rolling stock through a traction network is proposed. Proposed ideas are developed on the basis of the random processes correlation theory. The meter operates in real time and monitors not a set of realizations of random voltage and current processes, but their deterministic characteristics, that is, time functions of mathematical expectations and variances which make up the background of its operating principle. The experimental implementation of the proposed principle has been conducted in the feeder zone of an A-B section of the GisDnieper Railway of Ukraine, where registration and processing of realizations of stochastic voltage and current processes obtained in real operation mode has been done. The ratios obtained for active and reactive power can be applied not only for traction power grids, but also for electric networks of external power supply of DC electric traction systems as the basis for the “smart meter” design.

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