Modeling of direct current traction power system with the consideration for earth conductivity

2020 ◽  
pp. 75-79
Author(s):  
Dmitriy Valentinovich Lesnikov ◽  
Keyword(s):  
Mathematical Model ◽  
Power System ◽  
Direct Current ◽  
Skin Resistance ◽  
Railway Network ◽  
Traction Power Supply System ◽  
Traction Substations ◽  
Traction Power Supply ◽  
Earth Conductivity ◽  
Traction Power

Nowadays, one of the main tasks facing the JSC Russian Railways is the increase of volumes of freight transportation. The solution of this task is directly connected with the increase of the load on traction power system devices and their strengthening, which is primarily related to railways electrified with direct current that are characterized by high traction currents. In order to assess the possibility to strengthen a railway section and reveal «bottlenecks» in traction power supply system it is necessary to create a mathematical model of traction power system that must consider parameters of a specific section including earth conductivity that affects the values of skin resistance, potential of railway network and stray currents. The paper proposes a mathematical model of direct current traction power system that represents a combination of a catenary model and a model of railway network. The model considers parameters of traction substations, connection scheme of catenary suspensions and possible influence of rails from adjacent tracks on each other.

scholarly journals Methodology for selecting installation sites for automatic power redundancy systems of DC traction substations

2021 ◽  
pp. 63-66
Author(s):  
A. L. Kashtanov ◽  
◽  
Yu. V. Plotnikov ◽  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Energy Effect ◽  
Traction Power Supply System ◽  
Traction Substations ◽  
Traction Power Supply ◽  
Efficiency And Reliability ◽  
Traction Power

The paper presents a method for selecting the installation locations of power reservation systems of traction substations to reduce electricity losses in the system of traction power supply of DC railways. The analysis of the main criteria affecting the efficiency and reliability of the DC traction power supply system is carried out. The algorithm for selecting the installation locations of power reservation systems has been developed, which allows selecting traction substations that provide the greatest energy effect during the installation of systems

scholarly journals Increase of energy efficiency of electric power distribution networks by adjustment of reactive energy consumption in a traction network

2018 ◽  
Vol 239 ◽  
pp. 01049 ◽  
Author(s):  
Natalia Shurova ◽  
Valerii Li
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Traction Power Supply System ◽  
Traction Network ◽  
Traction Substations ◽  
Compensating Devices ◽  
Traction Power Supply ◽  
Traction Power

In the past few years, there has been a trend towards an increase in the volume of transportation by railway. At the same time, the load on the railway infrastructure increases, in particular, on the traction power supply system. It is necessary to solve the problem of increasing the energy efficiency of the external electric power supply system in the conditions of growing freight turnover and taking into account the uncertainty of the initial data. The paper considers one of the methods of strengthening the traction power supply system. Based on the results of the study, an algorithm was developed for selecting the installation sites and power of compensating devices in a traction network in the conditions of increasing freight turnover and under the condition of increasing the energy efficiency of the external power supply system of traction substations due to unloading of supply lines by reactive power and leveling the load in phases. This methodology includes predicting power consumption, determining the installation sites and power of compensating devices in the traction network under condition of uncertainty of the initial data, and then assessing the energy efficiency of the decision made. A calculation was carried out for the proposed algorithm for a section of the Far Eastern Railway which includes nine traction substations.

scholarly journals Mathematical model of traction vehicle movement

2019 ◽  
Vol 1 (1) ◽  
pp. 37-42
Author(s):  
Konrad Krzysztoszek
Keyword(s):  
Mathematical Model ◽  
Power Supply ◽  
Railway Line ◽  
Traction Power Supply System ◽  
Current Voltage ◽  
Traction Power Supply ◽  
Electric Traction ◽  
Basic Features ◽  
Vehicle Movement ◽  
Traction Power

The article presents a mathematical model of electric traction vehicle movement in a given power supply area. Starting from the presentation of the basic features of the 3 kV DC traction power supply system used in Poland, the author presents a simulation model of electric traction vehicles movement, which allows to determine the mobility and current - voltage possibilities on a selected railway line. The obtained simulation results fully confirm the possibility of using the model as an aid in the design, modernization or diagnostics of existing railway lines and train traffic.

Modeling of Traction Power Supply System Based on the User-Defined Model of PSASP

2014 ◽  
Vol 1008-1009 ◽  
pp. 437-440
Author(s):  
Yong Wang Zhang ◽  
Qing Liang Meng ◽  
Feng Pan ◽  
Wei Zhao
Keyword(s):  
Power System ◽  
Power Supply ◽  
Power Supply System ◽  
System Analysis ◽  
Supply System ◽  
Power System Analysis ◽  
Traction Power Supply System ◽  
Practical Model ◽  
Traction Power Supply ◽  
Traction Power

Using the user-defined model (UDM) provided by the power system analysis software package ( PSASP), This paper constructs traction power supply system model. The correctness of interface between user-defined model and PSASP is verified by independent dynamic characteristic program. It offers a new way of available practical model applying to power system simulation and research on the influence of traction loads to power system.

scholarly journals Aspect of load variability in determining power losses in the DC electric traction power supply system

2018 ◽  
Vol 19 (12) ◽  
pp. 831-834
Author(s):  
Jerzy Wojciechowski
Keyword(s):  
Power Systems ◽  
Power Supply System ◽  
Power Losses ◽  
Traction Power Supply System ◽  
Traction Substations ◽  
Traction Power Supply ◽  
Electric Traction ◽  
Power And Energy ◽  
Traction Load ◽  
Traction Power

The article discusses issues related to the variability of traction load and its impact on power losses in DC traction substations. Presented is the method of determining the influence of current averaging, which often happens in traction calculations. It has been shown that the averaging of the current has a significant impact on the inaccuracy of calculations or measurements of power and energy in DC traction power systems. The issues of variability of traction load are presented.

Increase of energy efficiency of traction power supply system by application of voltage regulating devices

2021 ◽  
pp. 78-85
Author(s):  
Irina Anatolyevna Baeva ◽  
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Power Supply System ◽  
Current Collector ◽  
Supply System ◽  
Electric Locomotive ◽  
Traction Power Supply System ◽  
Traction Substations ◽  
Traction Power Supply ◽  
Traction Power

Increase of energy efficiency of a traction power supply system in condition of growth of goods turnover becomes a very actual task. The paper considers energy efficiency of both the existing traction power supply system without current regulating devices and the traction power supply system with the use of such devices. The author has determined the influence of increase of speed from 50 to 100 km/h on power consumption on traction including on power consumption according counters of electric locomotives and losses of power in the catenary. Also as a variant of strengthening the paper considers a buffer traction power supply system consisting of main regulated traction substations and a not regulated single-unit traction substation in the middle of inter-substation zone. This system is used in situation when regulation of voltage on main traction substations doesn’t provide the increase of traffic and carrier capacity of sections (directions). Modeling of operation of the traction power supply system has been carried out on a section of the Sverdlovsk Railway. All the calculations have been executed for the batch of freight trains with the mass of 7100 tons. In calculations the author has applied a new clarifying method that includes the use of corrective current coefficients and the assessment of voltage level on an electric locomotive current collector. The energy efficiency of the traction power supply system has been assessed by such indicators as a level of voltage on the electric locomotive current collector, power losses in catenary and transformers of traction substations.

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