Jy. Yang et al., EDDY-CURRENT FIELDS AND OVERHEATING PROBLEMS DUE TO HEAVY CURRENT-CARRYING CONDUCTORS, IEEE transactions on magnetics, 30(5), 1994, pp. 3064-3067
Large complex problems, eddy current fields and local overheating due
to heavy current carrying conductors(HCCC) including leads and connect
ing bus bars in a 360MVA/500kV power transformer, are analyzed by the
boundary element method. To improve numerical accuracy, this paper cho
oses triangle polar coordinate mapping and addition-substraction techn
iques to evaluate singular integrals. The distributions of magnetic fl
ux and eddy current densities in metallic parts of different materials
are discussed. According to the criterion of overheating, permissible
lead current and limiting distance between HCCC and metallic parts an
d arrangements of HCCC am suggested.