Title :
Analysis of eddy current loss and local overheating in oil tank of a large transformer using 3-D FEM
Author :
Zhang, Yanli ; Yan, Bing ; Cao, Fan ; Xie, Dexin ; Zeng, Linsuo
Author_Institution :
Sch. of Electr. Eng., Shenyang Univ. of Technol., Shenyang, China
Abstract :
Taking a 380000kVA/500kV large power transformer as an example, in this paper, the eddy current loss generated by leakage magnetic field in transformer tank is calculated by two 3-D finite element methods (FEM) and the factors to affect the computation accuracy of loss are discussed. By adding magnetic shielding to the surface of oil tank, the maximum magnetic flux density and total eddy current loss are computed, and the effect of different size of the magnetic shielding is discussed.
Keywords :
eddy current losses; finite element analysis; magnetic shielding; power transformers; 3D finite element method; eddy current loss; leakage magnetic field; local overheating; magnetic flux density; magnetic shielding; oil tank; power transformer; voltage 500 kV; Magnetic cores; Magnetic flux; Magnetic noise; Magnetic shielding; Oil insulation; Surface impedance;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2011 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-1044-5
DOI :
10.1109/ICEMS.2011.6074007
