Losses of recovered electric energy in the elements of a DC electric transport system

Szeląg, A.; Костин, М. О.; Nikitenko, Anatolii

doi:10.1109/epepemc.2016.7752033

Cited by 3 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As follows from the publications analysed above [1][2][3][4][5][6][7][8] and also many other publications, which are not mentioned in the article, the assessment of power losses in the TPS is carried out either by calculation (analytical or modelling) or experimentally by power meters installed on TSs and ERSs. In the former case, the calculated input data are the electrical parameters and currents in the catenary system, and in the latter case, the currents and voltages of the corresponding electrical circuits of the TS and ERS.…”

Section: Analysis Of Selected Research Studies Dedicated To Power Los...mentioning

confidence: 99%

“…At the same time, the existing approaches and methods for electricity loss estimation in grids are the weakest link in the overall energy balance calculation circuit. In our opinion, this is due to the fact that traditional methods for analysis and reduction in energy losses in electric traction networks are based on the "circuit" approach, that is, on the theory and electrical appliances of electrical circuits, which follows from the analysis of publications [1][2][3][4][5][6][7][8]. This article continues and expands on the researches outlined in [9,10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

et al. 2022

Self Cite

View full text Add to dashboard Cite

This article presents a new method for the estimation of active power losses based on a “field” approach, i.e., on the theory of the electromagnetic field and the theory of propagation of electromagnetic waves in a dielectric medium. Electromagnetic waves are assumed to transmit energy from the traction substation to electric rolling stock through the airspace of the inter-substation zone (i.e., not through the wires of the traction network) and meet electrically conductive surfaces on their way. The waves are partially reflected from the surfaces and partially penetrate them, thus creating thermal losses, the determination of which is the main task of this article. The analytical expressions for specific losses of active power are obtained by solving the system of Maxwell’s equations. Calculations of specific power losses in the catenary, rails, roofs, and bottoms of carriages and electric locomotives are performed. Power losses in carriages and electric locomotives are found to be at least 7%. A comparative assessment of the magnitude of total power losses of different types obtained by the “field” and “circuit” approaches is provided, which has established that “conditional” losses correspond to losses in rails, train carriages, and electric locomotives.

show abstract

Section: Analysis Of Selected Research Studies Dedicated To Power Los...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…If it is necessary to estimate the technological losses in the traction network, they are determined through the same values-arguments P, f Q , a I , r I [16]:…”

Section: Mathematical Formulation Of the Problemmentioning

confidence: 99%

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

Костин¹,

Мищенко²,

Hoholyuk³

2021

Comput. probl. electr. eng.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Therefore, the train drivers frequently have no choice and apply the rheostat braking to reduce the high speed of the vehicle, so the recovered (kinetic) energy is uselessly dissipated in the ballast resistors. Furthermore, the experimental researches of [3] show that the losses of recovered energy in the overhead contact system vary from 6.3 to 20% in case of transmission to the train which operates in traction mode. The losses are equal to 1.5÷43.1% when the recovered energy flows to the traction substation and is inverted to AC grid.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic processes of charging of on-board supercapacitor storage system during the regenerative braking mode of DC electric rolling stock with series-wound DC motors

Nikitenko

2018

MATEC Web of Conferences

Self Cite

View full text Add to dashboard Cite

Abstract. The paper is dedicated to the task of improving of regenerative braking of a DC train with the series-wound DC traction motors. It is proposed the schematic solution for the trains with DC motors, which is based on the storing of recovered energy by the on-board supercapacitor storage system and extending the speed range of regenerative braking. The scheme is described by expressions which allowed to build the time dependences of main values. In addition, the experimental researches with the multiple-unit train were performed to find initial data for calculations and verification the results. The transient processes of charging are analyses for different cases of storage capacitances, residual voltages and initial speed of braking. It was proved, that the scheme allows to increase the value of recovered energy up to 40%, but its value strongly depends on the initial conditions and parameters of the system.

show abstract

Losses of recovered electric energy in the elements of a DC electric transport system

Cited by 3 publications

References 12 publications

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

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

Electromagnetic processes of charging of on-board supercapacitor storage system during the regenerative braking mode of DC electric rolling stock with series-wound DC motors

Contact Info

Product

Resources

About