Keywords
stator core
end zone
winding rod
isolation
finite element method
vibration movements
mechanical stresses
How to Cite
Abstract
Presented are the results of numerical studies of the distribution of vibration displacements and mechanical stresses in the insulation of the frontal part of the stator winding of a powerful turbogenerator under the influence of electrodynamics forces for different constructive solutions of the groove fastening of the winding rods in the end zone of the generator stator core. Modeling of mechanical processes is carried out using the finite element numerical method (FEM) in a two-dimensional setting. The possibility of improving the design with the aim of reducing the amplitude of oscillations of the front parts of the stator winding was considered. Ref. 16, fig. 7.
References
Letal J., Satmoko B., Manik N., Stone G. Stator End-Winding Vibration in Two-Pole Machines. IEEE Industry Application Magazine. November/December 2020. Pp. 23. DOI: https://doi.org/10.1109/MIAS.2020.2982725
Gorbatina L.P., Zhukov D.V., Kadi-Ogly I.A. Two-pole and four-pole turbogenerators capacity of 1000 MW for nuclear power plants. Description of the design, operating experience and ways to improve. Elektrosila. 2003. No 42. Pp. 16–21. (Rus)
Shidlovsky A.K., Tytko O.I., Fedorenko H.M. Electrodynamic stability of connecting and output buses stator windings and methods for improving the reliability of 1000 MW turbine generators. Energetika ta Elektrifi-kaziia. 2008. No 9. Pp. 22–27. (Ukr)
Fedorenko H.M., Ostapchuk L.B., Dubik G.O. Safety, reliability of powerful generators and their ways in-crease. Pratsi Instytutu Elektrodynamiky Natsionalnoi Akademii Nauk Ukrainy. 2011. No 30. Pp. 39–43. (Ukr)
System for continuous online monitoring of vibration of the end parts of the stator winding of generators and electric motors Iris Power EVTracII / OOO «DiAyris» URL: http://diiris.com/oborudovanie/diagnostika-statora/monitoring-lobovyih-chastey-obmotki/nepreryivnyiy-monitoring-vibratsii-lobovyih-chastey-obmotki-statora/ (accessed: 08.09.2021) (Rus)
Zhimolokhov O.M. Vibration and reliability of turbine generator stator windings in stationary modes. URL: https://www.dissercat.com/content/vibratsiya-i-nadezhnost-obmotok-statorov-turbogeneratorov-v-statsionarnykh-rezhimakh (accessed: 08.09.2021) (Rus)
Gyzhko Y.I., Zvarytch V.М., Myslovych M.V., Sysak R.M., Tukalo I.I. Perspectives of modernization of sys-tems of vibration monitoring and vibrodiagnostics of electrical power plants equipment on the example of Trypilska TES. Pratsi Instytutu Elektrodynamiky Natsionalnoi Akademii Nauk Ukrainy. 2012. No 33. Pp. 53−61. (Rus)
Yuling He. Electromagnetic Force and Mechanical Response of Turbo-Generator End Winding under Electro-mechanical Faults. Mathematical Problems in Engineering. December 2021. Vol 1. Pp. 1–19. DOI: https://doi.org/10.1155/2021/9064254
He Y., Gerada D., Ming X.X. Impact of stator inter-turn-short-circuit position on end winding vibration in syn-chronous generators. IEEE Transactions on Energy Conversion. 2020. Vol. 36. No. 2. Pp. 22–27. DOI: https://doi.org/10.1109/TEC.2020.3021901
Meng Q., He Y. Mechanical response before and after rotor inter-turn short-circuit fault on stator windings in synchronous generator. Proc. of the 2018 IEEE Student Conference on Electric Machines and Systems. HuZhou, China, December 2018. Pp. 1–7. DOI: https://doi.org/10.1109/SCEMS.2018.8624696
Kuchynskyi K.A. Effect on circulation disorders distillate on thermomechanical stresses in isolation of the sta-tor winding of the turbogenerator by power 800 MW. Tekhnichna Elektrodynamika. 2014. No 1. Pp. 75–80. (Rus)
Glebov I.A., Danilevich Ya.B. The scientific basis of designing of a turbogenerators. Leningrad: Nauka, 1986. 184 p. (Rus)
Golodnova O.S., Rostik G.V. The analysis and actions for the prevention of damages of cores of stators tur-bogenerators. Elektrosila. 2004. No 43. Pp. 56–64. (Rus)
Kuchynskyi K.A. Influence of the degree of fixing the winding at the end of the slot of the turbogenerator sta-tor on thermomechanical characteristics of its core isolation. Pratsi Instytutu Elektrodynamiky Natsionalnoi Akademii Nauk Ukrainy. 2022. No 61. Pp. 31−36. (Ukr) DOI: https://doi.org/10.15407/publishing2022.61.031
Vygovskiy A.V. Analysis, prediction and control of thermomechanical defects in the water cooling system of the stator windings of powerful turbogenerators NPP. Problemy bezpeky atomnyh elektrostantsiy i Chorno-bylya. 2015. No. 24. Pp. 20–26. (Ukr)
Kramarskiy V.A., CheremIsov I.Ya., Gruboy O.P., Tytko O.I., Penskiy V.F., Minko O.M. Electric machine stator. Patent UA No 99571, 2015. (Ukr)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright (c) 2022 K.A. Kuchynskyi, V.A. Kramarsky