Innovative principles of electric power supply of non-traction power consumers of railway transport

2020 ◽  
pp. 44-50
Author(s):  
A. V. Bondarenko ◽  
Keyword(s):  
Electric Power ◽  
High Voltage ◽  
Power Supply ◽  
Railway Transport ◽  
Supply Source ◽  
Electric Power Supply ◽  
Block System ◽  
Line Section ◽  
Power Supply Source ◽  
Magnetic Resistance

The issues of fundamental changes of electric power-supply of non-traction devices, such as, line-section devices and systems of railway transport are addressed in the article. It is clearly shown that the possibility of electric power-supply of such consumers without using the common high-voltage line-section power-supply lines of alternative voltage of 6 or 10 kV and respective power-supply substations can be implemented in practice. The essence of the proposed is that the electric power-supply source is not a high-voltage power-supply line, but a device which converts potential mechanical energy of a train, moving along a line section between signal points of railway automatic block system, into electrical one. Putting the described power-supply devices into operation provides technical as well as economic advantages over currently and widely used power-supply systems. The conversion of energy is carried out by changing magnetic resistance of a magnetic circuit, which includes railway car wheel-set in motion and direct neodymium magnet. Change in magnetic resistance due to the law of electromagnetic induction results in alternate voltage in the inductance coil, which is used as the electric power-supply source for non-traction line-section power consumers, including but not limited to, signal point of railway automatic block system. In case there is no wheel-set on the converter, electric power-supply for the power consumer is delivered by the electric energy accumulated in an ionistor (supercapacitor).

scholarly journals Development of a mathematical model of an autonomous power supply source with a free piston motor on the basis of a synchronous electric returning machine with a permanent magnets

2020 ◽  
Vol 22 (1) ◽  
pp. 38-48
Author(s):  
A. R. Safin ◽  
I. V. Ivshin ◽  
E. I. Gracheva ◽  
T. I. Petrov
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Power Plants ◽  
Permanent Magnets ◽  
Combustion Engine ◽  
Design Parameters ◽  
Supply Source ◽  
Free Piston ◽  
Power Supply Source ◽  
The Russian Federation

One of the current trends at present is the development of small energy, which is a particularly urgent task for the Russian Federation with its vast territories and the specifics of the electric power system. In the Russian Federation, the bulk of the electricity is generated at large power plants and transmitted through power lines. 60–70% of the country's territory lacks a centralized power supply, where more than 20 million people live, and the development of small and micro-energy facilities is necessary. Using a synchronous electric reciprocating machine with permanent magnets in power plants of a modular type makes it possible to rationally design an autonomous power supply source, to obtain the most optimal design. The development of methodological design decisions and the optimization of engine design parameters as part of generating and drive complexes is an important scientific task. A mathematical description of thermodynamic processes in a free-piston internal combustion engine, electromechanical and thermal processes occurring in a synchronous electric reciprocating machine with permanent magnets is developed, which is a necessary condition for designing and optimizing the design of an autonomous electric power complex. According to theoretical calculations, in the Matlab application, on the basis of the additional Simulink module, a simulation model of a free-piston internal combustion engine, linear current load calculation units, stator magnetic induction, magnetic induction created by permanent inductor magnets, electromagnetic force were developed and calculated. The created procedure for calculating the parameters of the electromagnetic component of the force of a synchronous machine with permanent magnets allows you to calculate and optimize the design parameters of the inductor and stator element of the electric motor under consideration. Thus, this will allow us to design electric machines with improved energy characteristics, due to the use of the obtained simulation results, which will allow us to use them more efficiently in the composition of generating and drive complexes.

scholarly journals Risk and Consequences of Transformer Explosions and Fires in Nuclear Power Plants / Ryzyko I Konsekwencje Wybuchów Transformatora I Pożarów W Elektrowniach Jądrowych

2012 ◽  
Vol 23 (1) ◽  
pp. 5-16 ◽  
Author(s):  
Heinz-Peter Berg ◽  
Nicole Fritze
Keyword(s):  
Electric Power ◽  
High Voltage ◽  
Power Supply ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Electric Power Supply ◽  
Failure Frequency ◽  
Diagnostic Measures ◽  
Fire Source

Abstract The high failure frequency and the resultant reliability and safety implications in recent years of transformers, in particular at nuclear power plants (NPP), required an in-depth assessment. Fires of main transformers are considered as critical because of the large quantity of oil in contact with high voltage elements. Therefore, these phenomena have been investigated in more detail using the information from the OECD FIRE database for NPP. 12.8 % of all fires and, thus, the most frequent fire source in this database are transformer fires, mainly fires of high voltage oil-filled transformers. Thus, possible diagnostic measures to avoid such events and enhance the reliability currently discussed in Germany are shortly described. Moreover, consequences of transformer failures with respect to a reliable electric power supply are addressed.

Optimization specificities of electric propulsion power supply subsystem on railway transport

2018 ◽  
pp. 414-425
Author(s):  
Alexander Marikin ◽  
Kseniya Stepanova
Keyword(s):  
Electric Power ◽  
High Voltage ◽  
Direct Current ◽  
Power Supply ◽  
Electric Propulsion ◽  
High Speed ◽  
Practical Importance ◽  
Voltage Level ◽  
Electric Power Supply ◽  
High Voltage Direct Current

Objective: To assess the basic factors, innovative technologies, on the basis of which an integrated network of electrified lines of high-speed rail is to be created in Russia. Methods: Optimization of the traction power supply system according to characteristic criteria of resources and energy efficiency minimization. Results: Quality indices of power supply of hauling operations, voltage level of collectors for different electric propulsion systems with direct and single-phase alternating current were analyzed. The key factors, significantly influencing the performance indices, are the voltage level and type of current of an electric powered network. It was shown that the system of electric propulsion is a promissory system and possesses the best competitiveness indices, as its electric power supply subsystem is functioning on high-voltage direct current with the use of a 24 kW direct current electric stock on the basis of a new multipurpose generation converting complex. Practical importance: The suggested justification method of electrification variant by means of a dependence diagram depicting spacing between substations and catenary wire section makes it possible to justify a competitive high-voltage direct current electric propulsion system during the design of electric power infrastructure for busy railway lines.

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