Title :
Diagnosis and numerical simulation of large hydra-generator under steady-state after heating faults of insulation aging
Author :
Feng, Zhou ; Shukang, Cheng ; Weili, Li ; Huanzhong, Dong
Author_Institution :
Sch. of Electr. Eng., Harbin Inst. of Technol., China
Abstract :
Isoparametric element method of hexahedron and eight nodes is used to calculate the 3D stator temperature fields of large hydro-generator. A SF300-48/1230 hydro-generator is taken for an example, with the strand insulation taken into account the 3D isoparametric finite element method and the theory of similarity for fluid are applied to calculate the 3D stator temperature field. The computed results meet with the measured results very well. The influence of insulation aging and shelling on stator temperature fields is analyzed by numerical simulation method and some useful conclusions are drawn, which provide theoretical basis for real-time temperature monitoring and heat faults diagnosing for generator.
Keywords :
ageing; fault diagnosis; finite element analysis; hydroelectric generators; insulation; stators; 3D isoparametric finite element method; 3D stator temperature field; heating fault diagnosing; hydro-generator; insulation aging; large hydra-generator; real-time temperature monitoring; theory of similarity for fluid; Aging; Fault diagnosis; Finite element methods; Heating; Insulation; Numerical simulation; Stators; Steady-state; Temperature measurement; Temperature sensors;
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
Print_ISBN :
0-7803-8486-5
DOI :
10.1109/IAS.2004.1348492
