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

download PDF

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.

1. Khramshin T.R., Krubtsov D.S., Kornilov G.P. Matematicheskaya model' aktivnogo vypryamitelya v nesimmetrichnyh rezhimah raboty [Mathematical model of the active rectifier under unbalanced voltage operating conditions]. Elektrotekhnika: setevoy elektronnyy nauchnyy zhurnal [Russian Internet Journal of Electrical Engineering], 2014, vol.1, no.2, pp.3-9.

2. Kornilov G.P., Nikolaev A.A., Anufriyev A.V. Osobennosti elektrosnabzheniya metallurgicheskogo zavoda «MMK Metalurji» [Features of electric power supply of a metallurgical plant “MMK Metalurji”]. Elektrotekhnicheskieye sistemy I kompleksy [Electrical systems and complexes]. Magnitogorsk, Magnitogorsk State Technical University, 2012, vol.20, pp.235-239.

3. Nikolaev A.A., Kornilov G.P., Ivekeev V.S., Lozhkin I.A., Kotyishev V.E., Tukhvatullin M.M. Ispol'zovanie staticheskogo tiristornogo kompensatora sverhmoshchnoy dugovoy staleplavil'noy pechi dlya obespecheniya ustoychivosti elektroenergeticheskoy sistemy i povysheniya nadezhnosti vnutrizavodskogo elektrosnabzheniya [Using the static thyristor compensator of the ultra-high power electric arc furnace for supporting of electrical power system’s stability and increasing reliability of factory power supply]. Mashinostroenie: setevoy elektronnyy nauchnyy zhurnal [Russian Internet Journal of Industrial Engineering], 2014, no.1, pp.59-69.

4. Khramshin T.R., Kornilov G.P., Krubtsov D.S., Nikolaev A.A., Karandaeva O.I., Zhuravlev Yu.P. Sposoby povysheniya nadezhnosti ustoychivosti elektroprivodov nepreryvnyh proizvodstv pri provalah napryazheniya [Methods of increasing the reliability of electric drives of continuous production in a voltage drops]. Vestnik YUzhno-Ural'skogo gosudarstvennogo universiteta. Seriya «Energetika» [Bulletin of the South Ural State University. Series “Power Engineering”], 2014, vol.14, no.2, pp.80-87.

5. Maklakov A.S. Imitacionnoe modelirovanie glavnogo elektroprivoda prokatnoy kleti tolstolistovogo stana 5000 [Simulation of the main electric drive of the plate mill rolling stand 5000]. Mashinostroenie: setevoy elektronnyy nauchnyy zhurnal [Russian Internet Journal of Industrial Engineering], 2014, no.3, pp.16-25.

6. Maklakov A.S., Gasiyarov V.R., Belyi А.V. Energosberegayushchiy elektroprivod na baze dvuhzvennogo preobrazovatelya chastoty s aktivnym vypryamitelem i avtonomnym invertorom napryazheniya [Energy-saving electric drive based on the two-inverter with an active rectifier and autonomous voltage inverter]. Elektrotekhnika: setevoy elektronnyy nauchnyy zhurnal [Russian Internet Journal of Electrical Engineering], 2014, no.1, pp.23-30.

7. Shreyner R.T. Matematicheskoye modelirovaniye elektroprivodov peremennogo toka s poluprovodnikovymi preobrazovatelyami chastity [Mathematical simulation of AC drives based on semiconductor frequency converters], Yekaterinburg, UrO RAN, 2010, 654 p.

8. Maklakov A.S., Radionov A.A. Vliyanie na set' trekhfaznogo mostovogo dvuhurovnevogo aktivnogo vypryamitelya napryazheniya pri razlichnyh vidah SHIM [Influence of a triphasic dual level bridge rectifier with different types of PWM to power network]. Mashinostroenie: setevoy elektronnyy nauchnyy zhurnal [Russian Internet Journal of Industrial Engineering], 2013, no.2, pp.40–47.

9. Khramshin T.R., Kornilov G.P., Nikolaev A.A., Khramshin R.R., Krubtsov D.S. Issledovanie vozdeystviya aktivnyh vypryamiteley bol'shoy moshchnosti na pitayushchuyu set' [Research of influence of high power active rectifiers on main supply] // Vestnik IGJeU [Journal of ISPU], 2013, no. 1, pp. 80- 83.

Details
Hits: 1119