optimal placement of the superconducting fault current limiter in substation

in recent years, due to grid interconnection by independent power producers, expansion of power system has become an inevitable situation accompanied by increasing fault current level. under such conditions, suppression of fault current is an important subject. one of the promising solutions is the super conducting fault current limiter (sfcl). sfcl has risen on new alternatives to large fault current problems. however, it is necessary to select the optimal location of sfcl. in this paper, the model of a resistive type of sfcl based on characteristics of electric field (e) in terms of current density (j) has been investigated in the electromagnetic transient program (emtp). case study is proposed on 400kv substation with single and double buses. in addition to find the favorable current limit, the results specify the optimal location of rsfcl installation.