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Beldjajev Viktor, Roasto Indrek and Lehtla Tõnu

References Iman-Eini, H.; Farhangi, S.; Schanen, J.-L.; Aime, J.;, "Design of Power Electronic Transformer based on Cascaded H-bridge Multilevel Converter," Industrial Electronics, 2007. ISIE 2007. IEEE International Symposium on , vol., no., pp.877-882, 4-7 June 2007. van der Merwe, J.W.; du T. Mouton, H.;, "The solid-state transformer concept: A new era in power distribution," AFRICON, 2009. AFRICON '09. , vol., no., pp.1-6, 23-25 Sept. 2009. Heinemann, L.; Mauthe, G.;, "The

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Tamás Orosz and Zoltán Ádám Tamus

R eferences [1] Del VECCHIO, R. M.—POULIN, B.—FEGHALI, P. T.—SHAH, D. M.—AHUJA, R. : Transformer Design Principles: with Applications to Core-Form Power Transformers, CRC press, 2010. [2] RYAN, H. M. : High Voltage Engineering and Testing 3rd Edition. IET, 2013, N0 32. [3] KULKARNI, S. V.—KHAPARDE, S. : Transformer Engineering: Design and Practice. CRC Press, 2004,, vol. 25. [4] KAPP, G. : Transformatoren für Wechselstrom und Drehstrom (Transformers for Single and Multiphase Currents: A Treatise on Their Theory, Construction, and Use

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Milan Stork and Daniel Mayer

R eferences [1] E. Priest, Solar magnetohydrodynamics , Dordecht, D. Reidel Publ.Co., 1984. [2] D. Mayer, ”Contribution to the investigation of the influence of geomagnetic storms on the electrification system”, Acta Technica AVCR , vol. 58, no. 4, pp. 351-365, 2013. [3] R. Girgis, ”Effects of geomagnetically induced currents on power transformers and power systems”, CIGRE , 21, rue d’Artois, F-75008 Paris, A2-304, pp. 1-8. [4] P. R. Price, ”Geomagnetically induced current effects on transformers”, IEEE Trans. on Power Delivery , vol

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Miroslav Gutten, Daniel Korenciak, Matej Kucera, Richard Janura, Adam Glowacz and Eliasz Kantoch

References [1] Hrabovcova, V., Rafajdus, P., Franko, M., Hudák, M. (2009). Measuring and Modelling of Electrical Machines. Žilina, Slovakia: EDIS. ISBN 978-80-8070- 924-2. (in Slovak) [2] Wang, T., He, Y.G., Luo, Q.W., Deng, F.M., Zhang, C.L. (2017). Self-powered RFID sensor tag for fault diagnosis and prognosis of transformer winding. IEEE Sensors Journal, 17 (19), 6418-6430. [3] Islam, M.M., Lee, G., Hettiwatte, S.N. (2017). A nearest neighbour clustering approach for incipient fault diagnosis of power

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L. Petrescu, E. Cazacu, V. Ioniţă and Maria-Cătălina Petrescu

/DC converter using MOSFET , Proc. International Conference on Power Electronics, Drives and Energy Systems, New Delhi, 2006, pp. 1–6, DOI: 10.1109/PEDES.2006.344412. [4] Cazacu, E., Nemoianu, I.V., Transient state characterization of electronic circuitry small power transformers , Revue Roumaine des Sciences Techniques -Serie Électrotechnique et Énergétique 58(4), 2013, pp. 385-394. [5] Ling, P. C. Y., Basak, A., Investigation on magnetizing inrush current in single-phase transformer, IEEE Trans. Magn., vol. 24, no. 6, pp. 3217–3222, Nov. 1988, DOI: 10

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Vira V. Protopopova, Myroslav V. Shevera, Oleksandr O. Orlov and Sergiy M. Panchenko

alien plant species on the phytobiota of Ukraine. In: O. V. Dudkin (ed.). Assessment and Mitigation of Threats to Biodiversity of Ukraine, pp. 129-155. Chimjest Publ., Kiev. Protopopova V. V. & Shevera M. V. 2014. Ergasiophytes of the Ukrainian flora. Biodiv. Res. Conserv. 35: 31-46. Protopopova V. V., Shevera M. V., Bagrikova, N. A. & Ryff L. E. 2012. T he transformer species of the flora of the South Coast of Crimea. Ukr. Bot. J. 69(1): 54-68. Protopopova V. V., Shevera M. V., Chorney I. I., Tokaryuk A. I., Budzhak V

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Karel Draxler and Renata Styblíková

R eferences [1] L. Trigo, G. Aristoy, A. Santos and D. Slomovitz, On Site Calibration of Current Transformers, Proc. of I2MTC 2014 , pp.1245-1246. [2] P. Mlejnek, P. Kaspar and K. Draxler, Measurement of Ratio Error and Phase Displacement of Current Transformers, EMSA ‘06 - 6th European Magnetic Sensors and Actuators Conference. Bilbao , University of the Basque Country, 2006, pp.39. [3] K. Draxler and R. Styblikova, Effect of Magnetization on Instrument Transformers Errors, Journal of Electrical Engineering , 2010, 61(7/s), pp.50-53, ISSN

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Sebastian Borucki, Andrzej Cichoń, Henryk Majchrzak and Dariusz Zmarzły

References 1. Bartoletti C., Dedideerio M., et al. (2004), Vibro-Acoustic Technique to Diagnose Power Transformers, IEEE Trans. on Power Del., 19, 1, 221-229. 2. Borucki S. (2009), Vibroacoustic Measurements in a Transient State of Transformer Operatrion, Acta Physica Polonica A, 116, 277-280. 3. Borucki S. (2012a), Diagnosis of Technical Condition of Power Transformers Based on the Analysis of Vibroacoustic Signals Measured in Transient Operating Conditions, IEEE Trans. on Power Del., 27, 670

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M. Kaczmarek

References [1] A. Cataliotti, D. Di Cara, A.E. Emanuel, and S. Nuccio, “A novel approach to current transformer characterization in the presence of harmonic distortion”, IEEE Trans. Instrum. and Meas. 58 (5), 1446-1453 (2009). [2] A. Wiszniewski, W. Rebizant, and L. Schiel, “Correction of current transformer transient performance”, IEEE Trans. Power Delivery 23 (2), 624-632 (2008). [3] M. Kaczmarek and R. Nowicz, “Application of instrument transformers in power quality assessment”, Proc. Modern Electric Power

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Georgi Shilyashki, Helmut Pfützner, Andreas Windischhofer, Gerald Trenner and Markus Giefing

model transformer core”, J. Electr. Eng. 61-7 , pp. 130-132, (2010). [4] G. Shilyashki, H. Pfützner, P. Hamberger, M. Aigner, A. Kenov and I. Matkovic, “Spatial distribution of magnetostriction, strain, displacements and noise generation of model transformer cores”, Int. J. Mech. Sci. 118 , pp. 188-194, (2016). [5] N. B. Ekreem, A. G. Olabi, T. Prescott, A. Rafferty and M. S. J. Hashmi, “An overview of magnetostriction, its use and methods to measure these properties”, J. Mater. Proc. Tech. 191 , pp. 96-101, (2007). [6] V. Galabov, H. Pfützner, G