Title :
Generator end windings forces and natural frequency analysis
Author :
Merkhouf, A. ; Boueri, B.F. ; Karmaker, H.
Author_Institution :
Dept. of Power Syst., GE Hydro, Peterborough, Ont., Canada
Abstract :
The end windings of hydro-generators are subject to electromagnetic forces during their operations. These forces will cause the winding to vibrate and deflect, which may lead to the excitation of the natural frequencies. In order to study in detail this phenomenon, a quasi-3D electromagnetic model, which computes the forces on the conductor bars, is coupled with 3D mechanical model to calculate the displacements using the computed electromagnetic forces. Numerical results during fault conditions of a 110 MVA synchronous generator are presented.
Keywords :
electromagnetic forces; finite element analysis; hydroelectric generators; machine theory; machine windings; synchronous generators; 110 MVA; 3D mechanical model; electromagnetic forces; generator end windings forces; hydro-generators; natural frequency analysis; quasi-3D electromagnetic model; winding deflection; winding vibration; Bars; Circuit faults; Conductors; Electromagnetic forces; Electromagnetic modeling; Finite element methods; Frequency; Machine windings; Stress; Synchronous machines;
Conference_Titel :
Electric Machines and Drives Conference, 2003. IEMDC'03. IEEE International
Print_ISBN :
0-7803-7817-2
DOI :
10.1109/IEMDC.2003.1211250
