Electric drive excitation control for improved performance of hot rolling mill finishing groups
ELEKTRINĖS PAVAROS SUŽADINIMO VALDYMAS KARŠTOJO VALCAVIMO STAKLIŲ GALUTINIO APDIRBIMO GRUPIŲ NAŠUMUI PAGERINTI
Druzhinin V. Tytiuk V. Kurliak P. Chornyi O. Sivyakova G. Kalinin A. Busher V.
2025Lithuanian Academy of Sciences Publishers
Energetika
2025#71Issue 150 - 62 pp.
The study presented in the paper investigates rigor-ously the methods for enhancing the performance of interconnected electric drives within the finishing group of a hot rolling mill. In particular, it examines the impact of supply voltage fluctuations on drive precision and the interactions mediated by the rolled metal strip. A detailed analysis of the existing power supply system identifies the primary causes of dynamic deviations in drive operation. A combined angular velocity control system is proposed to regulate the excitation of DC electric motors. The adaptive control strategy modulates magnetic flux during grid voltage drops, thereby reducing speed fluctuations and minimising tension inconsistencies in the inter-stand gaps. Unlike conventional systems that disregard supply voltage variations, the adaptive approach significantly improves the stability of the rolling process. A mathematical model of the system, incorporat-ing second-and third-order elastic couplings arising from both mechanical and electromagnetic interactions among the drives, is developed. Numerical simulations conducted in MATLAB/Simulink vali-date the efficiency of the proposed method. Optimal values for the relative reduction in the magnetic flux are determined to minimise discrepancies in drive currents and strip elongation. The results confirm that implementing adaptive control enhances system sta-bility, improves rolling quality, and reduces the load on the power supply, thereby supporting its adoption in rolling mills operating under unstable grid voltage conditions.
dynamic modes , elastic connections , hot rolling , two-zone regulation , voltage fluctuations
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Karaganda Industrial University, Department of Energy, Temirtau, Kazakhstan
Kryvyi Rih National University, Department of Electromechanics, Kryvyi Rih, Ukraine
Ivano-Frankivsk National Technical University of Oil and Gas, Department of Electrical Power Engineering, Ivano-Frankivsk, Ukraine
Kremenchuk Mykhailo Ostrohradskyi National University, Department of Systems of Automatic Control and Electric Drive, Kremenchuk, Ukraine
Karaganda Industrial University, Temirtau, Kazakhstan
Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan
National University ‘Odesa Maritime Academy’, Department of Electrical Engineering and Electronics, Odesa, Ukraine
Karaganda Industrial University
Kryvyi Rih National University
Ivano-Frankivsk National Technical University of Oil and Gas
Kremenchuk Mykhailo Ostrohradskyi National University
Karaganda Industrial University
Abylkas Saginov Karaganda Technical University
National University ‘Odesa Maritime Academy’
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