Premium
Vibration characteristic analysis of rotor in excitation winding inter‐turn short circuit state of turbo generator
Author(s) -
Yucai Wu,
Minghan Ma,
Yonggang Li,
Luo Wang
Publication year - 2019
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22884
Subject(s) - stator , rotor (electric) , fault (geology) , excitation , vibration , wound rotor motor , squirrel cage rotor , control theory (sociology) , engineering , field coil , generator (circuit theory) , amplitude , physics , acoustics , induction motor , electrical engineering , computer science , power (physics) , voltage , control (management) , quantum mechanics , artificial intelligence , seismology , geology
The distribution characteristics of fault electromagnetic field and temperature field and the unbalanced stresses on the rotor could be obtained through establishing a three‐dimensional model of the rotor and two‐dimensional models of the stator and rotor, and respectively solving the electromagnetic field and the temperature field of excitation winding inter‐turn short circuit fault by using the finite element analysis method. Two kinds of unbalanced stresses can be respectively equivalent to the unbalanced masses on the rotor surface. The equivalent centrifugal forces as excitation are added into the rotor dynamic equation, and solving the dynamic equation of the rotor by means of Newmark can finally obtain the rotor vibration response. The results show that the fault will cause the changes of amplitude and phase of rotor fundamental frequency vibration. So the amplitude and phase difference of the rotor fundamental frequency vibration can be used as the fault criterion in order to make an accurate diagnosis of excitation winding inter‐turn short circuit fault. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.