scholarly journals USE OF ASYNCHRONOUS GENERATORS IN TRACTION POWER SUPPLY

2020 ◽  
Vol 2018 (1) ◽  
pp. 131-132
Author(s):  
Grigoriy Arsent'ev ◽  
Andrey Kryukov ◽  
Anton Semkin
Keyword(s):  
Distributed Generation ◽  
Power Supply ◽  
Alternating Current ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Questions of application of distributed generation installations realized on the basis of asynchronous generators in railroad power supply systems of alternating current are considered.

scholarly journals Algorithm for calculating the rail-ground potential in heavy load conditions

2021 ◽  
Vol 284 ◽  
pp. 06002
Author(s):  
Ivan Ignatenko ◽  
Sergey Vlasenko ◽  
Evgeniy Tryapkin ◽  
Vladimir Kovalev
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Alternating Current ◽  
Supply System ◽  
Traction Power Supply System ◽  
Traction Current ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Ground Potential ◽  
Traction Power

Increased freight turnover on railway transport inevitably leads to increased traction current in DC and AC traction power supply systems. The increase in traction current is already causing problems related to the normal operation of the 25 kV AC traction power supply systems. One of the adverse consequences of the increased traction currents is the increased rail-to-ground potential. This has already caused a number of accidents and related traffic interruptions on the Far Eastern Railway of Russia and other railway sections powered with alternating current. The study considers the problem of increased rail-to-ground potentials and provides basic formulae for calculating the wave parameters of the rail network and rail-to-ground potentials. Various methods are given for calculating rail-to-ground potentials for a 25 kV AC traction power supply system. Since in an alternating current system, expressions for calculating the potential are functions of a complex variable, the calculation of such expressions requires the use of special programs. Adaptation of existing methods to modern software and computing systems allows you to optimize and significantly speed up the process of calculating the “rail-to-ground” potentials, either considering the use of certain potential-reducing measures or not. A calculation method includes an algorithm developed for calculating the rail-to-ground potentials in the 25 kV AC traction power supply system for an inter-substation zone of any length with any number of electric locomotives within the zone.

scholarly journals The method for increasing the efficiency of equipment’s maintenance in railway traction power supply systems

2018 ◽  
Vol 47 (3) ◽  
pp. 39-47 ◽  
Author(s):  
Oleksandr Matusevych ◽  
Valeriy Kuznetsov ◽  
Viktor SYCHENKO
Keyword(s):  
Power Supply ◽  
Operational Reliability ◽  
Technical Condition ◽  
Repair System ◽  
Maintenance And Repair ◽  
Traction Substations ◽  
Electric Equipment ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.

Design and Application of Var Compensation Method for Traction Power Supply Systems of Electrified Railway

2011 ◽  
Vol 130-134 ◽  
pp. 304-308
Author(s):  
Ling Wei ◽  
Jing Shuai Xiao ◽  
Da Yong Geng
Keyword(s):  
Power Systems ◽  
Power Supply ◽  
Engineering Application ◽  
Compensation Method ◽  
Theory And Practice ◽  
Electrified Railway ◽  
Var Compensation ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

The application of electric power, which acts as a pillar energy and economic artery in modern society, is one of the most important symbols of the level of development and comprehensive national power of a country. Var is a crucial factor for the design and operation of AC power systems, and is closely bound up with the safety, stabilization, and economical operation of power systems. With the development of electrified railway, the importance of the dynamic var compensation for traction power supply systems of electrified railway becomes more and more distinct. Developing the var compensation strategy vigorously has important senses in theory and practice. In this article, synthetically considering technique and economic leval of power systems in our country, parameters modeling and design and verification and specific engineering application of a var compensation method are presented. This method is a preferable one for resolving undesirable effect on power systems from traction power supply systems of electrified railway, especially having dynamic and real time characteristics of var compensation.

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