Title :
Finite element calculation of eddy current losses in the tank wall of power transformers
Author :
Schmidt, Erich ; Hamberger, Peter ; Seitlinger, Walter
Author_Institution :
Inst. of Electr. Drives & Machines, Vienna Univ. of Technol., Austria
Abstract :
To maintain quality, performance and competiveness, the finite element method is increasingly utilized not only for the verification of contractual values of existing transformers, but also for the design optimization of transformers. The paper presents 3D finite element analyses of power transformers in the range of 30 MVA to 200 MVA with the aim of an optimization of the tank wall shape and the tank wall shielding with regard to eddy current losses. Thereby, novel modelling strategies for the nonlinear eddy current carrying material is investigated. The results obtained from various finite element analyses are compared with measurements.
Keywords :
eddy current losses; ferromagnetic materials; finite element analysis; magnetic shielding; power transformers; 30 to 200 MVA; 3D finite element analyses; design optimization; eddy current losses; ferromagnetic material modelling; finite element analyses; finite element calculation; leakage field; nonlinear eddy current carrying material; power transformers; stray load losses; tank wall; tank wall shape optimization; tank wall shielding; Design optimization; Eddy currents; Finite element methods; Geometry; Magnetic flux; Magnetic materials; Material properties; Power transformers; Saturation magnetization; Steel;
Conference_Titel :
Electric Machines and Drives Conference, 2003. IEMDC'03. IEEE International
Print_ISBN :
0-7803-7817-2
DOI :
10.1109/IEMDC.2003.1210388
