Controllable-Dual Bridge Fault Current Limiter for Interconnection Micro-Grids

Different types of fault current limiters (FCLs) have been developed and designed based on non-superconducting DC reactors (NSDRs). This paper proposes a controllable dual-bridge FCL (CDBFCL) the NSDR for use in an AC-type micro-grid. It includes two series shunt bridge circuits. The is diode semiconductor switches coupled with line via transformer. thyristor parallel line. provides variable voltage source. compensates side drop due to resistance during normal operating condition. In addition, by controlling firing angle, it produces voltage, which can control amplitude fault. structure, principle work, system proposed CDBFCL are presented. performance studied analytically through simulation PSCAD/EMTDC software. results compared those obtained experimentally from prototype show close correlation.