scholarly journals Increasing the energy efficiency of auxiliary machines of AC electric locomotive

2021 ◽  
Vol 80 (5) ◽  
pp. 276-284
Author(s):  
Yu. M. Kulinich ◽  
S. A. Shukharev ◽  
A. V. Gulyaev
Keyword(s):  
Energy Efficiency ◽  
Vector Control ◽  
Control Method ◽  
Search Time ◽  
Energy Performance ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Engine Operation ◽  
Asynchronous Motors ◽  
Wide Range

Currently, an asynchronous variable frequency drive based on semiconductor converters is widely used due to the relative simplicity and reliability of the design. The use of digital microprocessor systems ensures high accuracy and flexibility of drive control. On the domestic rolling stock, the widespread introduction of asynchronous motors began to replace DC traction motors with sequential excitation. In particular, scalar-controlled asynchronous motors are used on serially produced 2TE25A diesel locomotives and EP20 electric locomotives. The auxiliary asynchronous machines of these locomotives are controlled by the vector control method. The use of a new type of engine on the rolling stock makes it possible to achieve a significant increase in the quality of consumed energy and reduce the consumption of electricity for traction of trains. Ensuring the energy efficiency of the drive in a wide range of loads requires further research. In this regard, the issue of saving energy resources becomes very urgent. The article proposes a vector control scheme for asynchronous motors of auxiliary machines of an electric locomotive, which implements an extreme method of control according to the criterion of minimizing the consumed current. The analysis of the engine operation is carried out based on its mathematical model in a rotating coordinate system d — q, which is implemented in the MatLab/Simulink software package. As a result of simulation modeling, it was found that the extreme control system with a variable step allows for each fixed value of the electromagnetic moment of the motor in the minimum time to find the optimal (extreme) value of the magnetic flux of the motor rotor, which corresponds to the minimum value of the stator current. The developed model of the motor with vector control is supplemented with an extreme regulator device, which allows achieving the best energy performance of the motor and reducing electrical losses in all operating modes with a minimum search time. The presented research results can be used in the development of energy-saving control systems for an asynchronous motor.

scholarly journals The use of correlation and regression analysis for assessment of the energy effectiveness of the dc electric locomotives auxiliary equipment

2018 ◽  
Vol 239 ◽  
pp. 01038 ◽  
Author(s):  
Stanislav Istomin
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Electricity Consumption ◽  
Technical Condition ◽  
Rolling Stock ◽  
Multiple Regression Equation ◽  
Electric Locomotive ◽  
Distribution Law ◽  
Auxiliary Equipment ◽  
Environment Temperature

Through additional processing of the modern movement parameter recorders data of the DC electric locomotive 2ES6 the article first presents the results of the actual consumption of electricity for own needs and the proportion of these costs from the consumption of trains traction is determined, which in terms of operational depot is difficult to implement. The estimation of influencing factors on the energy consumption for own needs of 2ES6 series electric locomotives is made. As a result it was found that the internal energy consumption is influenced by such factors as rolling stock mass, axle load and environment temperature. Statistic models were made to normalize internal electricity consumption and their quality estimation was fulfilled. It is found that the remainders of the multiple regression equation, which take the above factors into account, obey the normal distribution law, indicating the adequacy of their further use to assess the energy efficiency of the 2ES6 series DC electric locomotives auxiliary equipment. The use of regression models will allow to identify electric locomotives with auxiliary equipment with low energy efficiency and to send them to unscheduled repairs in time to restore the required technical condition.

Simulation Model of Traction Systems for CRH2 EMU Based on PSCAD/EMTDC

2011 ◽  
Vol 328-330 ◽  
pp. 662-666
Author(s):  
Fa Yun Ma ◽  
Hua Wei Li ◽  
Bing Guang Han ◽  
Jian Zhong Xu
Keyword(s):  
Simulation Model ◽  
Vector Control ◽  
Control Strategy ◽  
High Speed ◽  
Control Method ◽  
Low Frequency ◽  
Current Control ◽  
Electric Locomotive ◽  
Electrified Railway ◽  
Vector Control Strategy

The high-speed railway based on electromechanical integration develops rapidly in China in recent years. In order to improve research for electrified railway, a model of AC-DC-AC electric locomotive is established using electro- magnetic transient software PSCAD/EMTDC. In this paper, a single-phase tri-level rectifier of unit power factor and its control strategy of direct transient current control method are introduced at first. And then the working principles of the voltage space vector control strategy of inverter and the vector control strategy of cage motors are analyzed. The inverter and the motors must be as a whole because of the realization of motor vector control based on SVPWM inverter. At last, a model is established and the correctness and effectiveness of the model can be verified by the corresponding theory results. The simulation model is useful for the analysis of low frequency resonance in locomotives. The results will be applied in the research of mechanics and electric coupling in high speed electrified railway.

scholarly journals Improvement of energy indicators of conventional electric driving asynchronous motors of non-standard technological equipment at the enterprises for repair of railway rolling stock through the use of energy-saving motors

2019 ◽  
Vol 294 ◽  
pp. 01007
Author(s):  
Оleh Bondar ◽  
Oleksii Baliichuk ◽  
Oksana Karzova ◽  
Roman Krasnov ◽  
Oksana Marenych ◽  
...  
Keyword(s):  
Energy Saving ◽  
Energy Performance ◽  
Utilization Efficiency ◽  
Rolling Stock ◽  
Special Technique ◽  
Technological Equipment ◽  
Asynchronous Motors ◽  
Electric Driving ◽  
Energy Indicators ◽  
Railway Rolling Stock

The purpose of this work is to study the utilization efficiency of electric driving energy-saving motors of non-standard technological equipment meant for repair of railway rolling stock, in terms of improvement of energy performance, i.e. improvement of efficiency factors and power factors, and decrease of power losses as compared with the most commonly used “conventional” asynchronous motors. There are two options for improvement of the energy performance of electric drives of non-standard technological equipment: replacement of a conventional motor with an energy-saving one similar in terms of nominal voltage, rotational speed, power, etc.; changeover of stator winding from “delta” to “star”. A special technique has been proposed to determine the effectiveness of this changeover in terms of improvement of energy indicators. Comparison of the real values of the energy indicators of conventional motors and energy-saving motors in the case under consideration is required to perform the technical and economic calculations when solving the problem of the expediency of replacement of conventional asynchronous motors with energy-saving motors in the abovementioned equipment.

Energy Efficiency of Building Envelopes

2013 ◽  
Vol 855 ◽  
pp. 39-42 ◽  
Author(s):  
Richard Jedinák
Keyword(s):  
Energy Efficiency ◽  
Thermal Insulation ◽  
Energy Performance ◽  
Primary Energy ◽  
Insulation Material ◽  
Thermal Systems ◽  
Architectural Engineering ◽  
Energy Efficient Buildings ◽  
Wide Range ◽  
The Right

Energy efficiency of buildings is one of the basic requirements of current architectural engineering. The new recast of the Energy Performance of Buildings Directive (EPBD) calls for all new buildings to be nearly zero energy buildings by the end of 2020. To achieve this target is quite challenging. Nowadays some of the buildings that are realized are reaching these objectives. The current market is able to offer a wide range of thermal systems and thermal insulation materials themselves and the right choice of thermal system or thermal insulation material is a difficult task. Considering the significant impact that energy consumption has, is particularly important to implement policies aimed at improving energy efficiency in buildings. Highly energy efficient buildings can either save primary energy or disseminate the use of the most suitable technologies to be used in new constructions. The building may be considered as an example to study and optimize the benefits of higher energy efficiency together with the use of renewable energy systems. This article is going to discuss the characteristics of these solutions, trends in their research and development and their conceptual bases.

Electric Locomotive Variable Frequency Drive Device of Mine DC Lines

2011 ◽  
Vol 143-144 ◽  
pp. 87-91
Author(s):  
Guang Jun Ge ◽  
Yu Dong Li ◽  
Wei Zhang
Keyword(s):  
Digital Signal Processor ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Dynamic Performance ◽  
Permanent Magnet Synchronous Motor ◽  
Digital Signal ◽  
Electric Locomotive ◽  
Variable Frequency Drive ◽  
Auxiliary Power ◽  
Wide Range

This document presents a solution for controlling a permanent magnet synchronous motor(PMSM) for the coal mine of DC lines of electric locomotive using the Texas Instruments (TI) TMS320C2407A digital signal processor (DSP). The control method presented relies on the vector control technology and space vector pulse width modulation (SVPWM) technology, the control algorithm maintains efficiency in a wide range speed. This document describes the structure features of the converter, power electronics, the keyboard display and the auxiliary power supply, hardware implementation and software design. Experimental results show that the system has better static and dynamic performance, completely fits the DC lines of electric locomotive operation. This document describes a practical solution and corresponding result, and this research has been applied successfully in practical work.

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.

scholarly journals The Role and Place of Traditional Chimney System Solutions in Environmental Progress and in Reducing Energy Consumption

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4720
Author(s):  
Dariusz Bajno ◽  
Łukasz Bednarz ◽  
Agnieszka Grzybowska
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Fossil Fuels ◽  
Global Climate ◽  
Current Trend ◽  
Simulation Models ◽  
Energy Performance ◽  
Heat Losses ◽  
Building Structures ◽  
Wide Range

Buildings, energy, and the environment are key issues facing construction around the world. The energy efficiency of buildings is a key topic when it comes to reducing the world’s energy consumption, releasing harmful gases, and global climate change, as they consume about 40% of the world’s energy supplies. Heat losses in buildings reduce the energy performance of buildings and are basically important to them. In the paper, the authors focus on the main problems related to heat losses generated by chimney systems, which are inseparable equipment of building structures, resulting in lower energy efficiency and, at the same time, technical efficiency and durability of the building partitions themselves. Authors present thermal imaging with its contribution to the detection of heat losses, thermal bridges, insulation problems, and other performance disturbances, and then verifications using appropriate simulation models. The mathematical apparatus of artificial neural networks was implemented to predict the temperature distributions on the surfaces of prefabricated chimney solutions. In Europe, we can often find a large building substance equipped with traditional chimneys, which disrupts the current trend of striving to reduce energy consumption, especially that derived from fossil fuels. Speaking of energy-efficient buildings, one should not ignore those that, without additional security and modern installations, are constantly used in a very wide range. Therefore, the article deals with an essential problem that is not perceived in design studies and during the operation period as having a basis in incorrect architectural solutions and which can be easily eliminated. It concerns the cooling of internal partitions of buildings on their last storeys, in places where chimneys are located, regardless of their function. The authors of the paper decided to take a closer look at this phenomenon, which may allow the limiting of its effects and at the same time reduce its impact on the energy performance of technologically older buildings.

scholarly journals Improving the energy efficiency of power transmissions of a rolling stock on the basis of dynamic anisotropy of frictional contact

2019 ◽  
Vol 104 ◽  
pp. 01002
Author(s):  
Vladimir Shapovalov ◽  
Petr Shcherbak ◽  
Pavel Kharlamov ◽  
Tatiana Sajamova ◽  
Denis Ryabysh
Keyword(s):  
Energy Efficiency ◽  
Low Cost ◽  
Maximum Level ◽  
Power Input ◽  
Rolling Stock ◽  
Friction Units ◽  
Wide Range ◽  
Friction Parameters ◽  
Frictional System ◽  
High Level

The analysis showed the following tendencies of development and energy efficiency of designs of gearboxes for track machines: provision of a maximum level of efficiency, removal of rupture of a stream of the passed capacity, provision of a high level of reliability, decrease of power input on gearbox work, provision of convenience, simplicity of service and steering, engine braking maintenance, and also maintenance of a relatively low cost. The above-mentioned tasks are performed by including clutch pinion gears with the built in frictional amplifier elements in an automatic gearbox, and also during the effect of dynamic anisotropy of frictional bonds. Besides a torque transfer, the clutch gear carries out a safety clutch function. That means that there is sliding at a high rotational power. Factor of strengthening of the given link is Кstr → ∞ due to occurence of dynamic anisotropy of frictional bonds. Physical and mechanical characteristics of contacting surfaces are formed in the course of dynamic interaction of roughnesses in friction units at modes of dry and boundary friction. Essential-nonlinear friction processes, interconnected with dynamic processes on the contact area, define values of target characteristics of frictional system. They can fluctuate in a very wide range. The friction factor fmp for the same friction units at preservation of constant conditions and friction parameters can vary from zero to infinity that is an essence of dynamic anisotropy of frictional bonds.

scholarly journals Historical experience and prospects of corporatization of the Dnipropetrovsk electric locomotive plant (1988–2021)

2021 ◽  
Vol 2021 (54) ◽  
pp. 118-135
Author(s):  
Mykola Ruban ◽  
Keyword(s):  
Electric Vehicles ◽  
Structural Adjustment ◽  
Private Investment ◽  
Rolling Stock ◽  
Stock Exchanges ◽  
Electric Locomotive ◽  
Management Tools ◽  
Historical Experience ◽  
Wide Range ◽  
Technological Improvements

The article provides a retrospective analysis of the historical experience and problems of corporatization of the Dnipropetrovsk electric locomotive plant – a leading domestic manufacturer of industrial electric vehicles and railway rolling stock. The author traces historical circumstances of development and preconditions of diversification of production activity of the enterprise on the background of market economy in Ukraine and decrease in demand for narrowly specialized products. It was found out that during the 1990s–2000s the staff of SPA «DEVZ», having a promising research and production potential, mastered a wide range of production of mainline equipment to meet the needs of railways for innovative electric vehicles. However, due to low product quality and inefficient management system, the company is currently on the verge of bankruptcy, and its outdated design and technological improvements are not able to ensure competitiveness in the global railway market. It is proved that given the strategic importance of SE «DEVZ» for the national economy as the last profile locomotive company, its corporatization can be a real alternative to privatization, providing effective capitalization, financial and technological recovery and improving the culture of production with a state guarantee of preservation of the enterprise, as well as obtaining additional funds through the placement of securities on stock exchanges, and attracting private investment and innovation from international manufacturers. Further research on the historical aspects of the development of domestic engineering enterprises and their impact on the fleet of JSC «Ukrzaliznytsia» should be carried out taking into account the achievements of domestic science on the problems of structural adjustment of the economy and the use of modern strategic management tools.

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