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Electrical, Control and Communication Engineering

The Journal of Riga Technical University

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2255-9159
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Self-Excitation System for Synchronous Generator

Genadijs Zaleskis / Ivars Rankis / Marcis Prieditis
Published Online: 2013-12-31 | DOI: https://doi.org/10.2478/ecce-2013-0019

Abstract

Self-excitation for synchronous generator is described in the paper. The system is based on a buck converter input filter capacitor discharge through excitation winding of the generator. The buck converter is connected to the stator outputs through an uncontrollable diode rectifier, but excitation winding is used as a load. Input filter capacitor of the converter provides initial current pulse which magnetizes excitation system and produces the generator voltage increase, for this reason the capacitor is charged before self-excitation process starts.

Results of the computer simulation and physical experiment are obtained and presented. These results show that the proposed self-excitation converter in conjunction with an input capacitor pre-charged from a low-power electronic generator actually magnetizes the generator excitation system therefore generator voltage and accordingly excitation current increases. Stabilization of generator output voltage occurs with a voltage surge, though its peak value slightly exceeds the reference one.

The future investigation of the proposed self-excitation system may include definition of mathematical equations which describe transients in the generator’s self-excitation mode and development of control methods for purpose of self-excitation process control without voltage peaks. The computer model also should be improved.

Keywords : Wind energy generation; AC machines; generators; converters; power transistors

  • [1] L.Ribickis, G.Dilevs, E.Jakobsons, N.Levins, V.Pugachevs, Multipolar double fed induction generator with two phase secondary winding: Fourth International Conference and Exhibition on Ecological Vehicles & Renewable Energies, Monaco, Monte-Carlo, 26.-29. March, 2009. - pp re5 23-re5 23.Google Scholar

  • [2] G. Dilevs, E. Jakobsons, The Power Control of the Multipole Double Fed Induction Wind Generator: RTU zinātniskie raksti. 4. sēr., Enerģētika un elektrotehnika. - 23. sēj. (2008), 111.-114. lpp.Google Scholar

  • [3] E. Jakobsons, G. Dilevs, Multipole Double Fed Induction Generator Power Control: 8th International Symposium "Topical Problems in the Field of Electrical and Power Engineering. Doctoral School of Energy and Geotechnology II", Estonia, Parnu, 11.-16. January, 2010. - pp 272-276.Google Scholar

  • [4] H. Polinder, D.-J. Bang, H. Li, Z. Chen, M. Mueller, and A. McDonald, Concept Report on Generator Topologies, Mechanical & Electromagnetic Optimization. Project UpWind, 2007.Google Scholar

  • [5] G. Diļev, B. Ose-Zaļā, E. Jakobson, Self-Excitation of Low-Speed Inductor Generator: Latvian Journal of Physics and Technical Sciences, 2012, N 4, pp. 21-28.Google Scholar

  • [6] A. Gupta, D. K. Jain, and S. Dahiya, “Some Investigations on Recent Advances in Wind Energy Conversion Systems,” 2012 IACSIT Coimbatore Conferences, vol. 28, pp. 47-52, 2012.Google Scholar

  • [7] A. Cimpoeru, “Encoderless Vector Control of PMSG for Wind Turbine Applications,” Aalborg Universitet, Institute of Energy Technology, 2010.Google Scholar

  • [8] G. Zaleskis, I. Rankis, Capacitor Activated Self-Excitation System of Synchronous Generator: Electronics and Electrical Engineering, Kaunas, KTU, Nr. 7, 2012, pp. 53-56.Google Scholar

  • [9] G. Zaļeskis, I. Raņķis, „Sinhronā ģeneratora pašierosināsanas sistēma”, Latvijas patents uz izgudrojumu Nr. LV 14496, 20.05.2012.Google Scholar

  • [10] T. Wildi, Electrical Machines, Drives and Power Systems: Prentice Hall, NJ, 2002, 886 p.Google Scholar

  • [11] J. Dirba, K. Ketners, N. Levins, V. Pugačovs, Transporta elektriskās mašīnas: Rīga, Jumava, 2002, 344 p.Google Scholar

  • [12] Tze-Fun Chan, Weimin Wang, Loi Lei Lai, Series-connected selfexcited synchronous generator for distributed generation: Power and energy Society General Meeting, 2010, pp. 1-6.Google Scholar

  • [13] H. Awad, M. Wadi, E. Hamdi, A Self-Excited Synchronous Generator for Small Hydro Applications: The 9th WSEAS Circuits, Systems, Communications and Computers Multiconference, 2005, pp. 1-5.Google Scholar

  • [14] G. Zaleskis, I. Rankis, Self-Excitation System of Synchronous Generator with Buck Converter: Proceedings of the 54th International Scientific Conference on Power and Electrical Engineering, Riga, RTU, October 14-16, 2013, pp. 1-4 (submitted).Google Scholar

  • [15] G. Zaļeskis, I. Raņķis, „Sinhronā ģeneratora pašierosināsanas sistēma ar pazeminošo līdzstrāvas pārveidotāju”, patenta pieteikums Nr. P-13-94, 10.07.2013.Google Scholar

About the article

Genadijs Zaleskis

Genadijs Zaleskis, M. sc. ing., doct. student. He graduated from Riga Technical University in 2011 as Master of electrical engineering. From 2010-2011 he worked at Institute of Industrial Electronics and Electrical Engineering of Riga Technical University as laboratory technician. In 2011 he starts his doctoral studies in RTU. Since 2011 is working at Department of Industrial Electronics and Electrical Technologies of Riga Technical University as researcher. His main research fields are Electrical engineering technology and Industrial automation. Riga Technical University, Institute of Industrial Electronics and Electrical Engineering Address: Riga Technical University, Faculty of Power and Electrical Engineering, Latvia, Riga LV-1010, Kronvalda 1. Phone +371 28380558, e-mail: genadijs.zaleskis@rtu.lv

Ivars Rankis

Ivars Rankis, professor, Hab. Dr. sc. ing. He graduated from Riga Polytechnical institute in 1960 as engineer-electromechanic. Defended his first degree of Dr. sc. (candidate of technical sciences) in 1970. Defended his second degree Hab. Dr. sc. ing. in 1992 at Riga Technical University. From 1958-1966 he worked as engineer at Riga Electrical machine building company. From 1966 he started studies as doctoral student, but from 1970 – as teacher of different subjects of electrical engineering at Riga Technical University. Research interests are connected with Power electronics and Industrial automation. Now is professor at Department of Industrial Electronics and Electrical Technologies of Riga Technical University. Riga Technical University, Institute of Industrial Electronics and Electrical Engineering Address: Riga Technical University, Faculty of Power and Electrical Engineering, Latvia, Riga LV-1010, Kronvalda 1. Phone +371 67089917, e-mail: rankis@eef.rtu.lv

Marcis Prieditis

Marcis Prieditis M. sc. ing. He graduated from Riga Technical University in 2013 as Master of intelligent robotic systems. Since 2011 is member of research team that puts efforts on efficiency improvement in industrial robotics. Since 2013 is working at Department of Industrial Electronics and Electrical Technologies of Riga Technical University as laboratory assistant. Riga Technical University, Institute of Industrial Electronics and Electrical Engineering Riga Technical University, Faculty of Power and Electrical Engineering, Latvia, Riga LV-1010, Kronvalda 1. Phone +371 26065753, e-mail: prieditis.marcis@gmail.com


Published Online: 2013-12-31

Published in Print: 2013-12-01


Citation Information: Electrical, Control and Communication Engineering, ISSN (Online) 2255-9159, ISSN (Print) 2255-9140, DOI: https://doi.org/10.2478/ecce-2013-0019.

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