DOI: 10.18503/1995-2732-2020-18-3-58-68
Abstract
Problem Statement (Relevance): In modern industry, when commissioning electric arc furnaces, mathematical models of the electric circuit of the furnace are widely used to solve practical problems. In this case, the adequacy of the model largely depends on the correct determination of the actual parameters of the circuit. Moreover, the methods for determining the parameters are not detailed enough in the Russian literature, and they also have a number of disadvantages. The objective of the study is to develop an improved method for determining the electric circuit parameters of an electric arc furnace based on experimental data obtained directly at the industrial site. Methods Applied: To make the final calculation of the electric circuit parameters, a series of experiments of two-phase and three-phase short circuits with a full immersion of electrodes in the melt is carried out, including recording the results of the experiment using the RES-3 electrical signal recorder. Originality: In Russian and foreign literature, when describing the methods of conducting short circuit tests, control of the relative position of phases is not used, reducing the accuracy of determining the electric circuit parameters. This peculiarity is taken into account in the proposed method. Findings: Based on the results of the short circuit experiments, the electric circuit parameters and the mutual inductance values of the shaft-type electric arc furnace ShP-125 were obtained. Practical Relevance: The results obtained are of a high practical importance, ensuring the fulfillment of energy conditions, when conducting research to identify energy reserves and optimize electrical modes of EAF.
Keywords
Electric arc furnace, ladle furnace, electric arc, electric circuit, electrical mode, energy efficiency, short circuit experiment.
For citation
Nikolaev A.A., Tulupov P.G., Denisevich A.S. An Improved Method of Determining the Electric Circuit Parameters for an Electric Arc Furnace Based on the Experimental Data. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2020, vol. 18, no. 3, pp. 58–68. https://doi.org/10.18503/1995-2732-2020-18-3-58-68
1. Nikolaev A.A., Tulupov P.G. Method of setting optimum asymmetric mode of operation of electric arc furnace. Proc. 11th France-Japan & 9th Europe-Asia Congress on Mechatronics, 2016, pp. 033-037. DOI:10.1109/MECATRO-NICS.2016.7547111.
2. Nikolaev A.A., Rousseau J.-J., Szymanski V., Tulupov P.G. An experimental study of electric arc current harmonics in electric arc furnaces with different power characteristics. Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University], 2016, vol.14, no. 3. DOI:10.18503/1995-2732-2016-14-3-106-120 (In Russ.)
3. Nikolaev A.A., Tulupov P.G., Omelchenko E.Ya. Experimental analysis of electric arc current and electric arc voltage harmonic composition of powerful shaft electric arc furnace. Elektrotekhnicheskie sistemy i kompleksy (Electrotechnical Systems and Complexes], 2018, no. 4 (41), pp.63–72. (In Russ.)
4. B. Bowman, K. Krüger. Arc furnace physics. Verlag Stahleisen GmbH, Düsseldorf, 2009.
5. Cassie A.M. Nouvelle théorie des arcs de rupture et rigidité du circuit (New theory of breaker arcs and circuit rigidity). CIGRE Report No. 102, 1939.
6. Ignatov I.I., Khainson A.V. Mathematical modeling of electric modes of electric arc furnaces. Elektrichestvo [Electricity], 1985, no. 8, pp. 69–72. (In Russ.)
7. Köhle S., Lichtbogenreaktanzen von Drehstrom-Lichtbogenöfen (Arc reactances of AC arc furnace). Elektrowärme International 51, B4, 1993, pp. 175–185.
8. Krüger K. Modellbildung und Regelung der elektrischen Energieumsetzung von Lichtbogenöfen (Modeling and control of the electrical energy conversion in arc furnaces). Dr.-Ing. Dissertation, Fachbereich Maschinenbau, Universität der Bundeswehr Hamburg, Fortschritt-Berichte VDI. Reihe 6, Nr. 382, VDI-Verlag, Düsseldorf, 1998.
9. Timm K. Reaktanzsymmetrierung von Hochstromleitungen für drehstrom Lichtbogenöfen (Reactance symmetrization of the high-current lines for AC arc furnaces). Elektrowärme International 49, B4, 1991, pp. 201–211.
10. Svenchansky A.D., Zherdev I.T., Kruchinin A.M. et al. Elektricheskie promyshlennye pechi: dugovye pechi i ustanovki spetsialnogo nagreva: uchebnik dlya vuzov [Electric industrial furnaces: Arc furnaces and special heating installations: Textbook for universities]. Moscow: Energoizdat, 1981, 296 p. (In Russ.)
11. B. Boulet, G. Lalli, M. Ajersch. Modeling and control of an electric arc furnace. The American Control Conference, Denver, CO, USA, Jun. 4–6, 2000.
12. M. Panoiu, C. Panoiu, L. Ghiormez. Modeling of the electric arc behaviour of the electric arc furnace. The 5th International Workshop on Soft Computing Applications, Szeged, Hungary, 2012, pp. 261–271.
13. Wang Yan, Mao Zhi-zhong, Tian Hui-xin, Li Yan, Yuan Ping. Modeling of electrode system for three-phase electric arc furnace. J.Cent. South Univ. Technol. (2010) 17:560-565. DOI:10.1007/s11771-010-0523-3
14. Bowman B. Computer modeling of arc furnace electrical operation. Metalurgia International 1, 1988, no. 4, pp. 286–291.
15. Nikolaev A.A., Tulupov P.G., Savinov D.A. Mathematical model of electrode positioning hydraulic drive of electric arc steel-making furnace taking into account stochastic disturbances of arcs. International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM), pp. 1-6, 2017. DOI: 10.1109/ICIEAM.2017.8076205