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Evaluation of Dynamic and Static Eccentric Faults in Turbo Generator
Author(s) -
Wu Yucai,
Ma Qianqian,
Cai Bochong,
He Yuling
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.22926
Subject(s) - eccentricity (behavior) , turbo generator , stator , permeance , rotor (electric) , eccentric , electromagnetic coil , fault (geology) , voltage , harmonic , generator (circuit theory) , engineering , structural engineering , turbo , amplitude , control theory (sociology) , computer science , mechanical engineering , acoustics , electrical engineering , physics , power (physics) , automotive engineering , geology , artificial intelligence , membrane , law , biology , genetics , control (management) , quantum mechanics , political science , permeation , seismology
Rotor eccentricity is a common fault in turbo generators, but there is currently no effective means of evaluating the eccentric state of the generators. In this article, the air‐gap permeance method was used to analyze the influence of rotor eccentricity on the no‐load main magnetic field, and the installation of U‐type detection coils within the stator core was proposed. Using this method, the dynamic eccentricity level can be measured by detecting the 2nd harmonic amplitude of the coil‐induced voltage, and the static eccentricity level can be measured using the difference in the induced voltages from the U‐type coils. Two dimensional numerical simulation results show that the U‐type detection coil is suitable for the detection of dynamic and static eccentric faults. Therefore, this method can be used for the evaluation of the eccentric state in turbo generators. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.