Determination of the Power Factor of Electric Rolling Stock of Alternating Current Consumption

Goolak, Sergey; Liubarskyi, Borys; Sapronova, Svitlana; Tkachenko, Viktor; Riabov, Ievgen

doi:10.1007/978-3-030-94774-3_24

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…A non-stationary, non-deterministic process of voltage variation in the catenary network [27][28][29] causes voltage pulsations in the DC link. Moreover, these voltage pulsations are of a stochastic nature.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Efficiency of Traction Drive Control Systems of Electric Locomotives with Asynchronous Traction Motors

Goolak¹,

Liubarskyi

Riabov

et al. 2023

Energies

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An analysis of the operating conditions of the traction drives of an electric rolling stock with asynchronous traction motors was conducted. In the process of operation, the electric traction drive with both direct torque control and vector control was found to possibly experience unstable modes, both in terms of power supply and load. The models of electric locomotive traction drives with asynchronous electric motors with either vector or direct torque control were adapted to account for the possible presence of the aforementioned operational factors. As a result of the modeling, the starting characteristics of the electric traction drives with different control systems were obtained both in the absence and in the presence of power supply and load disturbances. The following cases were investigated for the drive with vector and direct torque control in the absence of power supply and torque disturbances: drive output at the rated speed of rotation of the electric motor shaft; 10% reduction in the rated speed; 10% increase in the rated speed. The comparison of the results obtained has demonstrated that, at lower than nominal frequencies, the electric traction drive with direct torque control has higher accuracy in its regulation of the rotational speed and torque, lower power consumption from the power supply, lower torque overshooting, but a higher level of torque pulsations than the electric traction drive with vector control. Meanwhile, at higher than nominal frequencies, the vector control has higher accuracy in its regulation of the speed, lower torque overshooting, shorter duration of transient processes, and lower torque pulsations than the direct torque control. Moreover, as a result of the investigations, the traction drive with direct torque control has been found to be more resistant to power supply and load disturbances. The results of this work are applicable to the investigation of the influence of electric traction drive control methods on the energy efficiency of the traction drive of an electric locomotive with an alternating current (AC).

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Section: Introductionmentioning

confidence: 99%

Analysis of the Efficiency of Traction Drive Control Systems of Electric Locomotives with Asynchronous Traction Motors

Goolak¹,

Liubarskyi

Riabov

et al. 2023

Energies

View full text Add to dashboard Cite

show abstract

“…This leads to the short-term occurrence of transient processes in the traction drive system, which, in turn, causes the asymmetry of the stator current systems of the traction motors and the asymmetry of the voltage system at the output of the traction inverter. The non-stationary, non-deterministic process of changing the voltage in the catenary [15][16][17] causes voltage pulsations on the direct current link. An attempt to break down one motor causes an unevenness of the current load, which will lead to an asymmetry of the system of traction currents [18,19] when several traction motors are powered from one inverter.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a direct torque control system in the presence of winding asymmetry in induction motor

et al. 2023

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The operation of a direct torque control (DTC) system for induction motors with the possible presence of unbalanced modes in the motor windings is studied. It is shown that in the presence of asymmetric modes in the motor windings, the classical DTC algorithm becomes unstable. It is proposed to improve the DTC by taking into account the unbalance of the active resistances of the motor stator windings when determining the DTC parameters. This will make it possible to study electrodynamic processes in DTC with the possible presence of asymmetric modes in the windings of induction motor.

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Increasing the energy efficiency of the multi-motor traction electric drive of an electric locomotive for railway quarry transport

Riabov

Goolak

Kondratieva

et al. 2023

Engineering Science and Technology, an International Journal

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Determination of the Power Factor of Electric Rolling Stock of Alternating Current Consumption

Cited by 3 publications

References 19 publications

Analysis of the Efficiency of Traction Drive Control Systems of Electric Locomotives with Asynchronous Traction Motors

Analysis of the Efficiency of Traction Drive Control Systems of Electric Locomotives with Asynchronous Traction Motors

Simulation of a direct torque control system in the presence of winding asymmetry in induction motor

Increasing the energy efficiency of the multi-motor traction electric drive of an electric locomotive for railway quarry transport

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