Title :
An ideal cooling system for pumped-storage electric machines
Author :
Yao, Ruo-ping ; Rao, Fang-quan
Author_Institution :
Dept. of Electr. Eng., Shanghai Jiao Tong Univ., China
Abstract :
The pumped-storage sets have been broadly applied for the power net recently. Due to their changeable load feature, there are some problems of the reliability cause by the temperature difference between the stator core and frame and the thermal expansion difference between the conductors and isolation. Authors propose that the evaporation cooling system (ECS), as an ideal cooling system for the pumped-storage machines and large vertical hydro-generators, can be used not only for new machines but also for upgrading of the existed machines in order to improve the operation reliability without any complexity of maintenance. The results of 3D FEM thermal field analysis for a 400 MW hydro-generator with ECS have been introduced in this paper briefly and the advantages of the ECS have been proved.
Keywords :
cooling; cores; finite element analysis; hydroelectric generators; reliability; stators; thermal expansion; 3D FEM thermal field analysis; 400 MW; changeable load feature; evaporation cooling system; large vertical hydrogenerators; maintenance complexity; operation reliability; power net; pumped-storage electric machines; reliability problems; stator core; temperature difference; thermal expansion difference; Conductors; Cooling; Electric machines; Power system reliability; Pumps; Stator cores; Temperature; Thermal conductivity; Thermal expansion; Thermal loading;
Conference_Titel :
Power Engineering Society General Meeting, 2003, IEEE
Print_ISBN :
0-7803-7989-6
DOI :
10.1109/PES.2003.1267376
