Title :
3D analysis and calculation of stator temperature field of hydrogenerator in the case of sudden short circuit
Author :
Yadong, Fan ; Xishan, Wen ; Shaohua, Xu ; Wei, Deng
Author_Institution :
Sch. of Electr. Eng., Wuhan Univ.
Abstract :
Sudden short circuit is a serious transient process though it is short in time. In this paper, 3D transient equations of heat conduction as well as its equivalent functional equation are presented. Short circuit current of stator is performed. Sudden short current and heat of the stator are analyzed and calculated. Base on the construction symmetry of ventilating system in hydro the solution region of stator temperature field is determined as the range of half tooth, half trough and half axial core section, and heat dissipation coefficients of each surface and equivalent heat conductivity coefficients of iron and stator winding considering the insulation layers. In addition, the heat sources are analyzed. Finite element method (FEM) software-ANSYS is applied to calculate the transient temperature field of a kind of 125 MW hydro-generator under sudden short circuit
Keywords :
cooling; electric machine analysis computing; finite element analysis; heat conduction; hydroelectric generators; machine insulation; short-circuit currents; stators; ventilation; 125 MW; 3D transient equation; ANSYS software; axial core; finite element method; heat conduction; heat dissipation coefficient; heat sources; hydrogenerator; insulation layer; iron; short circuit current; stator temperature field; tooth; trough; ventilating system; Conductivity; Equations; Finite element methods; Insulation; Iron; Short circuit currents; Stator cores; Stator windings; Teeth; Temperature distribution;
Conference_Titel :
Electrical Insulation, 2006. Conference Record of the 2006 IEEE International Symposium on
Conference_Location :
Toronto, Ont.
Print_ISBN :
1-4244-0333-2
DOI :
10.1109/ELINSL.2006.1665280
