The simulation of EMC problems in underground power cable systems is c
haracterized by solving an open nonlinear eddy current problem, to whi
ch the Hybrid FE-BE Method is applied in this paper, The significance
of this approach is the combination of the advantages of the FEM and t
he BEM, The influence of a thin ferromagnetic plate on the nonlinear i
teration convergence is discussed, Furthermore, the shielding effects
of the ferromagnetic plates are numerically investigated.