Optimized Size and Placement of Resistive SFCLs in Active Distribution Networks Using SAPSO

To solve the fault current problem of active distribution networks (ADNs) where multiple distributed generators (DGs) are accommodated, using resistive type superconducting fault current limiter (SFCL) can be regarded as a feasible option, and the optimal allocation method of the SFCLs is proposed in this paper. Firstly, a brief short-circuit current analysis of the ADNs with DGs is conducted. Then, the mathematical model of the resistive SFCL is built, and the optimization objective function is created. In light of a hybrid particle swarm optimization (PSO) algorithm combining traditional PSO and simulated annealing, the detailed optimal procedure is elaborated. Aiming at a modified IEEE 33-bus distribution system with six DGs, the performance of the proposed approach is evaluated. It is found that the fault currents in all buses can be suppressed within the allowable limit, and the effectiveness of the proposed optimization method is well verified.