Keywords
unbalanced loading
magnetic fields
numerical calculations
electromagnetic processes
rotor
temporal functions турбогенератор
несимметричная нагрузка
магнитные поля
численные расчеты
электромагнитные процессы
ротор
временные функции
How to Cite
Abstract
The estimation of the turbo-generator rotor work was conducted under turbo-generator unbalanced loading within the framework of its standard limitations on the basis of the multi-position numerical calculations of the rotating magnetic field. The results of calculations at the asymmetrical loading which were carried out by the example of 35 MW turbogenerator are compared with similar results with symmetrical loading. The form of temporal functions and harmonic composition of the EMF in the rotor winding and in its slot wedges are analyzed, the estimation of currents caused by these EMF is done. Level of the variable EMF in the field winding is very significant, however the variable component of current in it isn't a serious problem. EMF in the rotor wedges reach tens of volts, currents - of the order of 2.5 kA, and in different wedges they differ markedly. The temporal functions of the magnetic induction variable component on the surface of the spinning rotor, whose values increase significantly because of the unbalanced load, are also examined. References 13, tables 3, figures 8.
References
Zozulin Yu.V., Antonov O.Ye., Bychik V.M., Borychevskyy A.M., Kobzar K.O., Livshyts O.L., Rakohon V.H., Rohovyy I.Kh., Khaymovych L.L., Cherednyk V.I. Creation of new types and modernization of the existing turbogenerators for the thermal electric stations. – Kharkiv: PF «Kolehium», 2011. – Pp. 68-76. (Ukr)
Izvekov V.I., Serihin N.A., Abramov A.I. Planning of turbogenerators. – Moskva: MEI, 2005. – 440 p. (Rus)
Kogan F.L. Anormal modes of powerful turbogenerators. – Moskva: Energoatomizdat, 1988. – 188 p. (Rus)
Milykh V.I., Polyakova N.V. Automated calculations of the dynamics of a turbo-generator electromagnetic processes in the software environment FEMM // Electrical engineering & Electromechanics. – 2015. – No 6. – Pp. 16– 20. (Rus) doi: https://doi.org/10.20998/2074-272X.2015.6.04 .
Milykh V.I., Polyakova N.V. Organization of numerical calculation of the magnetic field of turbogenerator in the mode of loading with providing of prescribed out parameters // Electrical engineering & Electromechanics. – 2012. – No 1. – Pp. 36-41. (Rus) doi: https://doi.org/10.20998/2074-272X.2012.1.08 .
Milykh V.I. Organization of the numerical-field calculations of electromagnetic processes in a turbogenerator at its asymmetrical loading // Visnyk Natsionalnoho Tekhnichnoho Universytetu "KhPI". Seriia "Elektrychni mashyny ta elektromekhanichne peretvorennia enerhii". – 2016. – No 11 (1183). – Pp. 3–10. (Rus)
Milykh V.I., Polyakova N.V. Comparative analysis of the variable magnetic field on the surface of the rotor of turbogenerators with different numbers of stator teeth in the load condition // Tekhnichna Elektrodynamika. – 2014. – No 2. – Pp. 29–36. (Rus)
Milykh V.I. The numerical-field analysis of the magnetic field and the electrical quantities in the turbogenerator stator under autonomous unbalanced loading // Electrical engineering & Electromechanics. – 2016. – No 5. – Pp. 16-22. (Rus) doi: https://doi.org/10.20998/2074-272X.2016.5.02 .
Titko O.I., Vaskovskyi Yu.N., Kramarskyi V.A., Kuchynskyi K.A., Ahremenko V.L. Physical aspects of a problem reliability and efficiency of powerful turbogenerators // Pratsi Instytutu elektrodynamiky Natsionalnoi Akademii Nauk Ukrainy. – 2011. – No 29. – Pp. 90–103. (Ukr)
Titko O.I., Melnik A.M. Modelling and distribution of electromagnetic forces operated on the teeth and the cores of stator winding of the turbogenerator // Tekhnichna Elektrodynamika. – 2015. – No 3. – Pp. 40–46. (Ukr)
Shulzhenko N.G., Pantelyat M.G., Rudenko E.K., Zozulin Yu.V. Additional losses in the rotor of turbogenerator at the long asymmetrical loading // Electrical engineering & Electromechanics. – 2006. – No 1. – Pp. 54–57. (Rus)
Bianchi Nicola. Electrical Machine Analysis Using Finite Elements (Copyrighted Material). – CRC Press: Taylor & Francis Group, University of West Florida, 2005. – 276 p.
Meeker, D. Finite Element Method Magnetics: OldVersions. Finite Element Method Magnetics: Home-Page. DavidMeeker, 11 October 2010. Web. 10 March 2014 http://www.femm.info/wiki/OldVersions
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright (c) 2022 Tekhnichna Elektrodynamika