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Expose of distributed generation (DG) to the distribution network increases the fault current level. This will give rise to fault current which is normally greater than interrupt capability of breakers and fuses. The introduction of solid state fault current limiters (SSFCLs) becomes an effective way for suppressing such a high short-circuit current fault in distribution systems. In this paper, the effect of proposed SSFCL on reduction of fault current is investigated. Then genetic algorithm is employed to search for the optimal number, locations and size of proposed SSFCL. The Numerical and simulation results show the efficiency of proposed GA based FCL allocation and sizing method in terms of minimization of distribution protection system cost.