Open AccessFinite Element Modelling of Big Turbo-Generator Rotor Vibrations using Newmark-beta Integration Method
Author(s) -
Tarun Kumar,
Rajeev Kumar,
S. C. Jain
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/876/1/012004
Subject(s) - turbo generator , rotor (electric) , fault (geology) , matlab , vibration , finite element method , line (geometry) , structural engineering , engineering , permanent magnet synchronous generator , control theory (sociology) , physics , voltage , computer science , acoustics , electrical engineering , mathematics , geometry , geology , control (management) , artificial intelligence , seismology , operating system
In this paper big turbo-generator rotor vibrations are simulated for various electrical faults. Newmark-beta method is used to simulate the vibrations at various critical sections of the rotor. Rotor is modelled using finite element method with solid, hollow and tapered elements. Torque in the generator during the course of electrical faults is modelled using dq0 formulation and solved in MATLAB using 4 th order predictor-corrector method. Line to ground (L-G), line to line (L-L), three phase (L-L-L) and asynchronization faults are simulated for 300msec. The torsional vibrations in rotor at critical section is found to be most severe during three phase fault followed by mal-synchronization fault followed by the line to line fault followed by line to ground fault.