Development of methods for overcoming self-oscillatory modes in an asynchronous electric drive with a thyristor voltage regulator

Authors

DOI:

https://doi.org/10.15587/2706-5448.2026.358421

Keywords:

starting devices, self-oscillation modes, controlled reactor compensator, simulation modeling

Abstract

The object of research is the processes of electromagnetic transformation in powerful asynchronous electric drives during controlled starting using a thyristor voltage regulator.

The problem to be solved by the research is overcoming the self-oscillating modes of powerful high-voltage asynchronous electric drives during controlled starting in the nominal slip range.

A design feature of powerful high-voltage induction motors in comparison with general-purpose motors is a small value (up to 1%) of the nominal slip. Also, such electric motors have a relatively small value of their own moment of inertia. These features create conditions for the occurrence of self-oscillations when entering a steady-state operating mode.

A mathematical model of an induction motor has been developed taking into account the influence of the rotor current displacement phenomenon to study the modes of controlled starting of an asynchronous electric drive of an industrial mechanism taking into account the influence of the enterprise's distribution network.

From the point of view of the power supply network, an induction motor is a nonlinear active-inductive resistance, the phase angle of which can quickly change over a wide range in the vicinity of the nominal slip. The mechanism of the occurrence of self-oscillations during controlled start-up of high-voltage induction motors from a thyristor voltage regulator is disclosed. Self-oscillations occur in the nominal slip region due to the transition of the thyristor voltage regulator to an uncontrolled operating mode, when the load phase angle becomes greater than the thyristor control angle, including in the quasi-generator operating mode.

To prevent the occurrence of self-oscillation modes, it is proposed to use a controlled reactive power compensator between the motor and the thyristor voltage regulator, which stabilizes the total load phase angle, which helps to improve the controllability of the electric drive.

Author Biographies

Victor Busher, National University “Odessa Maritime Academy”

Doctor of Technical Sciences, Professor

Department of Electrical Engineering and Electronics

 

Vladyslav Baranovskyi, Kryvyi Rih National University

PhD, Senior Lecturer

Department of Electrical Engineering

Oleksiy Gromovyy, Zhytomyr State Polytechnic University

PhD, Associate Professor

Department of Robotics, Electric Power Engineering and Automation named after Prof. B. B. Samotokin

Valeriy Druzhinin, Karaganda Industrial University

PhD, Associate Professor

Department of Power Engineering

Lubov Melnikova, Odesa Polytechnic National University

PhD, Associate Professor

Department of Electromechanical Engineering

Andrii Tkachuk, Zhytomyr State Polytechnic University

PhD, Associate Professor, Dean

Andrii Romanets, Zaporizhzhia National University

PhD Student

Department of Electrical Engineering and Cyber-Physical Systems

Oleksandr Pidtychenko, Zhytomyr State Polytechnic University

PhD

Department of Robotics, Electric Power Engineering and Automation named after Prof. B. B. Samotokin

Anna Humeniuk, Zhytomyr State Polytechnic University

PhD, Associate Professor

Department of Robotics, Electric Power Engineering and Automation named after Prof. B. B. Samotokin

Ilya Kolysnychenko, Dnipro University of Technology

PhD, Associate Professor

Department of Cyberphysical and Information and Measurement Systems

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Development of methods for overcoming self-oscillatory modes in an asynchronous electric drive with a thyristor voltage regulator

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Published

2026-04-30

How to Cite

Busher, V., Baranovskyi, V., Gromovyy, O., Druzhinin, V., Melnikova, L., Tkachuk, A., Romanets, A., Pidtychenko, O., Humeniuk, A., & Kolysnychenko, I. (2026). Development of methods for overcoming self-oscillatory modes in an asynchronous electric drive with a thyristor voltage regulator. Technology Audit and Production Reserves, 2(1(88), 70–80. https://doi.org/10.15587/2706-5448.2026.358421

Issue

Vol. 2 No. 1(88) (2026): Industrial and technology systems

Section

Electrical Engineering and Industrial Electronics

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Copyright (c) 2026 Victor Busher, Vladyslav Baranovskyi, Oleksiy Gromovyy, Valeriy Druzhinin, Lubov Melnikova, Andriі Tkachuk, Andrii Romanets, Oleksandr Pidtychenko, Anna Humeniuk, Ilya Kolysnychenko

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