Nikolaev A.A., Denisevich A.S., Lozhkin I.A., Tukhvatullin M.M. Investigation of voltage drops’ influence in the power supply system of the "MMK Metalurji" ironworks on the main electric drives of the hot strip mill

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Abstract

The article describes a method of increasing the reliability of the main drives of the hot strip mill "1750" JSC "MMK Metalurji" (Iskenderun, Turkey) due to use of reserves of reactive power of the static var compensator installed at the ironwork’s electrical substation. The mathematical model of a frequency converter with a multilevel active rectifier was elaborated. Researches of transient processes of currents and voltages during voltage drop in 34.5 kV network have been made on the model. Causes of frequency converter tripping were determined and the effectiveness of methods of damping of voltage drops using the static var compensator was proven.

Keywords

Voltage drop; frequency converter; active rectifier; hot strip mill main electric drive; static var compensator.

Nikolaev Alexander Arkadyevich – Ph.D.(Eng.), Associate Professor, Head of the Department “Automatic Electric Drive and Mechatronics”, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Denisevich Alexander Sergeevich – Master Degree Student, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Lozhkin Igor Aleksandrovich – Postgraduate Student, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Tukhvatullin Muradum Mavletdinovich – Chief Specialist of the Mechanical and Energy Infrastructure Department of the «VPO «Tochmash», Rosatom State Atomic Energy Corporation. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

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