Optimal location of fault current limiters to improve fault current and voltage sag in AC and DC microgrids

Abstract: One of the most important issues about implementing superconducting fault current limiters in the future intelligent networks is studying its possible effects on fault current and power quality parameters. Hence, SFCL locating in power systems has been taken into consideration. Due to the microgrid connection to the power grid, abnormal fault current is a serious issue that should be eliminated. The side effects of fault occurrence on power quality can cause electrical equipment failure which increases the need for controlling power quality parameters including voltage sags. This paper uses resistive SFCL to overcome the mentioned problems in microgrids. Different SFCL arrangements are studied in Matlab Simulink environment to decrease the fault current and voltage sag improvement, and the optimal arrangement will be selected. The simulation results introduce the optimal SFCl for fault current and voltage sag control while indicating that SFCL is effective for AC and DC microgrid protection.

Keywords: Supeconductive fault current limiter, microgrid, power quality, voltage sag, fault current.