Analysis of Power Quality for Active Power Stabilization of Electric Arc Furnace by Means of Static Var Compensator
DOI:
https://doi.org/10.14529/power190306Keywords:
quality of electricity, static var compensator, control modes of thyristor-controlled reactor, electric arc furnace, voltage deviation, flicker, reactive power factorAbstract
The paper presents the key findings of studying the quality of electricity at the buses of an electric steel-making complex as affected by a static var compensator (SVC) running a novel control algorithm designed to improve the electric performance of an electric arc furnace (EAF) by stabilizing its active power at an optimal value. Analysis of how an SVC runs this algorithm reveals a considerable degradation of voltage quality compared to experiments with conventional algorithms. For detailed evaluation of SVC effects on the quality of electricity (QE), the research team ran an SVC in active-power mode and computed the QE values characterizing slow voltage deviations, non-sinusoidality, imbalance, and fluctuation; the values were compared against those attained by the reactive power- or voltage-controlled compensator. Experimentation used the mathematical model of an existing EAF-120-SVC unit, which was developed and run in MATLAB Simulink. To enable
the SVC to sustain a constant active EAF power while also keeping the QE values sufficiently high, the paper proposes a structure of additional voltage and reactive power coefficient constraints, voltage balancing, and flicker suppression.
References
Yu H., Yue Y., Zhifei C., Ling X. Research on the Calculation of the Influence of Arc Furnace Reactive Impact Loads on Power system and the Method of Compensation. 2010 Conference Proceedings IPEC. Singa-pore, 2010, pp. 1052–1055. DOI: 10.1109/IPECON.2010.5696970
Ustariz-Farfan A. J., Cano-Plata E.A., Arias-Guzman S. Electric Arc Furnaces Influence in Power Systems Area. 2017 IEEE Industry Applications Society Annual Meeting. Cincinnati, OH (USA), 2017, pp. 1–6. DOI: 10.1109/IAS.2017.8101813
Dionise T.J. Assessing the Performance of a Static Var Compensator for an Electric Arc Furnace. IEEE Transactions on Industry Applications, 2014, vol. 50, iss. 3, pp. 1619–1629. DOI: 10.1109/TIA.2013.2282762
Nenakhov A.I., Gamazin S.I., Mologin D.S. [Specifics of Constructing Static Var Compensator Controls]. Elektrooborudovaniye: ekspluatatsiya i remont [Electrical Equipment: Exploitation and Repair], 2014, no. 1,
pp. 36–42. (in Russ.)
Nikolaev A.A. Povyshenie ehffektivnosti raboty ehlektrotekhnicheskogo kompleksa “dugovaya staleplavilʹ¬naya pechʹ – staticheskiy tiristornyy kompensator” [Optimizing the SVC-EAF Complex]. Magnito-gorsk, Nosov Magnitogorsk State Technical University Publ., 2017. 318 p.
Kawamura A. An Optimal Control Method Applied for the Compensation of the Fundamental VAR Fluc-tuations in the Arc Furnace. IEEE Transactions of Industry Applications, 1983, vol. 1A-19, iss. 3, pp. 414–423. DOI: 10.1109/ TIA.1983.4504217
Nikolaev A.A., Kornilov G.P., Anokhin V.V. [Comparative Analysis of Static Var Compensator Control Modes for High Power Electric Arc Furnace]. Bulletin of the South Ural State University. Ser. Power Engineering, 2016, vol. 16, no. 2, pp. 35–46. (in Russ.). DOI: 10.14529/ power160205
GOST 32144–2013. [Electric Energy. Electromagnetic Compatibility of Technical Equipment. Power Qua-lity Limits in the Public Power Supply Systems]. Moscow, Standartinform Publ., 2014. 20 p. (in Russ.)
O poryadke rascheta znacheniy sootnosheniya potrebleniya aktivnoy i reaktivnoy moshchnosti dlya otdel-nykh energoprinimayushchikh ustroystv (grupp energoprinimayushchikh ustroystv) potrebiteley elektricheskoy energii [Calcaulating the Active-Reactive Power Ratio for Electricity Consumers’ Power Units or Their Clusters], Order of the Ministry of Industrial Energy of the Russian Federation on 23 June, 2015 no. 380, Registered in
the Russian Ministry of Justice on July 22, 2015 no. 38151.
Uz-Logoglu E., Salor O., Ermis M. Online Characterization of Interharmonics and Harmonics of AC Elec-tric Arc Furnaces by Multiple Synchronous Reference Frame Analysis. IEEE Transaction on Industry Applica-tions, 2016, vol. 52, iss. 3, pp. 2673–2683. DOI: 101109/TIA.2016.2524455
Grünbaum R., Ekström P., Hellström A.A. Powerful Reactive Power Compensation of a Very Large Elec-tric Arc Furnace. Proceedings of the 2013 Fourth International Conference on Power Engineering, Energy and Electrical Drives. Istambul (Turkey), 2013, pp. 277–282. DOI: 10.1109/PowerEng. 2013.6635619
Nikolaev A.A., Anokhin V.V., Tulupov P.G. [Design of Mathematical Model of Electrotechnical Complex “Electric Arc Furnace – Static Var Compensator”]. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2016, no. 4 (33), pp. 61–71. (in Russ.). DOI: 10.18503/2311-8318-2016-4(33)-61-71
Guygui L., Otto R.A., Putman T.H. Principles and Applications of Static, Thyristor-Controlled Shunt Compensators. IEEE. Transaction on Power Apparatus and Systems, 1978, vol. PAS-97, no. 5, pp. 1935–1945. DOI: 10.1109/tpas.1978.354690
Gamazin S.I., Kulaga M.A., Nenakhov A.I. [Mathematical Evaluation of the Suppression of Flicker Using SVC]. Ehnergo- i resursosberezhenie – XXI vek [Energy and Resource Saving – XXI Century]. Orel, Orel State University Publ, 2013, pp. 60–62. (in Russ.)
Vagin G.A., Loskutov A.A., Sevostyanov A.A. Elektromagnitnaya sovmestimost v elektroenergetike [Electromagnetic Compatibility in Electric Power Industry]. Moscow, Academy Publ., 2010. 244 p.
Sharov Yu.V., Kartashyov I.I., Tulskiy V.N., Bolshakov O.V. [Research of Interrelation of Power Quality Parameter and Reliability of Power Supply]. Energoekspert [Energy Expert], 2011, no. 6, pp. 78–83. (in Russ.)
GOST R 51317.4.15–2012. [Electromagnetic Compatibility of Technical Equipment. Flikermeter. Func-tional and Design Specifications]. Moscow, Standartinform Publ., 2014. 38 p. (in Russ.)
Hasler J-P., Johansson T., Angquist L. Method and a Device for Compensation of Reactive Power. Patent USA, no. 6114841; decl. 12.06.1997; publ. 5.09.2000.
Tropin V.V., Kuzmenko V.A., Mologin D.S., Panova O.S. Datchik reaktivnoy moshchnosti rezkopere-mennoy nagruzki dlya upravleniya staticheskim kompensatorom reaktivnoy moshchnosti [Abruptly Variable Load Reactive Power Sensor for Controlling a Static Reactive Power Compensator]. Patent RF, no. 2488204; decl. 10.01.2012; publ. 20.07.2013, Bul. no. 20.
Sorokin G.A. [Filters of the Lower Frequencies]. Bulletin of the South Ural State University. Ser. Comput-er Technologies, Automatic Control, Radio Electronics, 2015, vol. 15, no. 1, pp. 100–107. (in Russ.)
Wang F. The Exact and Unique Solution for Phase-Lead and Phase-Lag Compensation. IEEE Transac-tions on Education, 2003, vol. 46, no. 2, pp. 258–262. DOI: 10.1109/te.2002.808279
