Solid-state fault current limiter for medium voltage distribution systems

This work presents a thyristor-controlled fault current limiter for medium voltage distribution systems (6-10 kV). The main goal of the proposed scheme is to alleviate the effect of the fault current on the switchgear and other equipment The limiter is designed mainly for application in industries with large motors installed, where motor´s feeding to the fault is significant model of the power system with the limiter has been developed using ATP-EMTP. Results of simulations, showing the efficiency of the limiter applications, are presented in the paper.