Title :
Research on Stator 3D Temperature Field of Hydro-Generator Under Sudden Short Circuit
Author :
Fan, Yadong ; Wen, Xishan ; Liu, Qiang
Author_Institution :
Sch. of Electr. Eng., Wuhan Univ., Wuhan
Abstract :
This paper presents the 3D transient equation of heat conduction and its equivalent functional equation, and analyzes and calculates the sudden short current and stator heat generation. According to the structural symmetry of a hydro-generator´s ventilation system, the model of stator temperature field is determined as a range of half tooth, half slot and half axial height. Heat conductivity coefficients of iron core and stator winding, as well as heat convection coefficients of each surface, are calculated. Iron and copper losses are deduced by electromagnetic analysis. Then, the transient temperature field of a kind of hydro-generator under sudden short circuit is calculated. The variation of temperature field of the slot for the investigated electric machine can be obtained through thermal analysis and calculation.
Keywords :
convection; heat conduction; hydroelectric generators; stators; thermal conductivity; ventilation; 3D transient equation; electric machine; electromagnetic analysis; equivalent functional equation; heat conduction; heat conductivity coefficients; heat convection coefficients; hydro-generator ventilation system; iron core; stator 3D temperature field; stator heat generation; stator winding; sudden short circuit; sudden short current; thermal analysis; Circuits; Conductivity; Equations; Iron; Stator cores; Stator windings; Teeth; Temperature distribution; Transient analysis; Ventilation;
Conference_Titel :
Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-2486-3
Electronic_ISBN :
978-1-4244-2487-0
DOI :
10.1109/APPEEC.2009.4918710
