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The paper considers the most energy-intensive object of the steelmaking complex, particularly, the electric arc furnace (EAF-125) of a metallurgical open Joint-stock company "AMURMETAL", Komsomolsk-on-Amur. The authors described the functional role of the static thyristor compensator (STC). The simplified scheme of electric power supply of the EAF is given. The insufficient speed of hydraulic drives moving the furnace electrodes is indicated, which leads to the arc extinction. Stepwise regulation of the voltage at the input of the furnace transformer (FT), with the help of an on-load tap changer, leads to the loss of continuous control over the technological process of steelmaking. When switching the stages of the on-load tap changer, short-circuits can arise between the coils, which create electrodynamic shock loads on the transformer windings reducing the reliability of the FT. The research group suggested a technical solution, which makes it possible to replace the on-load tap changer, providing continuous adjustment of the voltage within the predetermined range on the high side of the FT. Mathematical models of reactor-thyristor voltage regulator (RTVR) and its control system were developed in "MatLab" environment. The paper shows a block - modular simulation model of RTVR with real parameters. Numerical experiments were conducted to investigate its regulatory properties and its influence on the network. Oscillograms of current and voltage of the device elements are considered. The results of the study showed that the process of regulation does not effect significantly the current and voltage; the mode of intermittent current does not arise. The possibility of using a thyristor voltage regulator with natural switching (TVRN), which is part of STC, is considered.


Arc steel-smelting furnace, thyristor valve, reactor-thyristor voltage regulator, arc current, furnace transformer, static thyristor compensator, on-load tap changer.

Aleksey Yu. Getopanov

Postgraduate student, the Head of substation section of the electrical repair shop, OJSC «AMURMETALL», Komsomolsk-on-Amur, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID:

Bekhruz D. Tabarov

Postgraduate student, the Department of Career Guidance and Advertising, Komsomolsk-on-Amur State University, Komsomolsk-on-Amur, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Vladimir S. Klimash

D.Sc. (Eng.), Professor, Professor of the Department of Industrial Electronics, Komsomolsk-on-Amur State University, Komsomolsk-on-Amur, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

1. Smirnov A.N. Metallurgicheskie mini-zavody [Metallurgical mini-factories]. Donetsk: Nord-Press, 2005. 469 p. (In Russian)

2. Yakimov I.A., Nikolayev A.A., Kornilov G.P. Investigation of Ultra-High Power Furnaces with Thyristor Voltage Regulator in the Intermediate Circuit of the Furnace Transformer. Setevoy elektronniy nauchniy zhurnal [Internet Journal of Electrical Engineering], 2014, vol. 1, no. 1, pp. 41–47. (In Russian)

3. Karandaev A.S., Evdokimov S.A., Sarlibaev A.A., Lednov R.A. Requirements to the monitoring system of ultrahigh power electric arc furnace transformer performance. Rossiyskiy internet-zhurnal promishlennoy inzhenerii [Russian Internet Journal of Industrial Engineering], 2013, no. 2 (25), pp. 58-68. (In Russian).

4. Sviridov V.A., Bakharev N.P. Providing electrodynamic withstand of power transformers. Molodoy uchyoniy [Young scientist], 2017, no. 32, pp. 20–25. (In Russian).

5. Klimash V.S., Tabarov B.D., Getopanov A.Yu. Puskoregu-liruyushee ustroystvo na storone visokovo napryaweniya transformatornoy podstansii [The ballast on the high voltage side of the transformer substation]. Patent RF, no. 166559, 2016.

6. Yakimov I.A. Substantiation of thyristor regulation of voltage of arc furnace transformer. Elektrotecknicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2017, no. 2 (35), pp. 41–48. (In Russian).

7. Gensini J., Morello L., Koassini J., Fragiacomo R. Sposob regulirovaniya tryokhfaznoy elektrodugovoy pechi pryamovo nagreva [Method of current regulation of three-phase electric arc furnace of direct heating]. Patent RF, no. 2086076, 1997.

8. Hatch Associates Ltd., Satcon Power Systems Canada Ltd. Power control system for ac electric arc furnace. Patent US, no. 09/778,835, 2003.

9. Zenzo I., Tsutomu K. Steel melting arc furnace transformer equipment directly connected to 154 kV power source with tertiary loud switching system. Fuji electricheskiy obzor [Fuji electric review], 2014, vol. 17, no. 1, pp.16–23.

10. Klimash V.S., Tabarov B.D., Getopanov A.Yu. Sposob vklyucheniya, viyklyucheniya i regulirovaniya napryaweniya transformatornoy podstansii [A method for switching on and off and regulation of voltage transformer substation]. Patent RF, no. 2622890, 2017.

11. Anshin V.Sh. Electric furnace transformers for the metallurgical industry, produced by the Open Joint-Stock Company "Electrozavod". Elektro [Electro], 2006, no. 4, pp. 16-20. (In Russian)

12. Vereshchago E.N., Kostyuchenko V.I. The model of electric arc in Matlab / simulink. Elektrotekhnika i elektroenergetika [Electrical Engineering and Power Engineering], 2013, no.2(25), pp. 40–46. (In Ukrainian).

13. Chunikhin A.A. Elektricheskie apparatiy [Electrical apparatus]. General course. Textbook for high schools. 3rd ed., revised and enlarged. Moscow: Energoatomizdat Publ., 1988. 720 p. (In Russian)

14. Klimash V.S., Tabarov B.D. Certificate RF №2017613852 of software registration for computers «Program complex mathematical models of thyristor magnetic ballast for power transformer in Matlab medium». Bulletin no. 4, 03.04.17.

15. Static thyristor reactive power compensator type STK-160/35: technical description and operating instructions. JSC Ansaldo-VEI. Moscow, 2008. 71 p.