To　address　issues　related　to　rapid　increases　in　fault　currents,　high　peak　values,　and　the　challenge　of　ensuring　reliable　power　supply　in　non-fault　areas　within　DC　distribution　networks,　a　novel　fault　current　limiter　for　DC　grids　is　proposed.　The　limiter　design　incorporates　a　bridge　circuit　to　diminish　peak　fault　currents,　a　coupling　reactance　for　expediting　fault　transfer,　and　a　primary　current-limiting　branch　that　employs　pulse-width　modulation　to　suppress　fault　currents.　A　coordinated　strategy　is　introduced　between　the　proposed　limiter　and　DC　circuit　breakers,　utilizing　voltage　differential　criteria　and　directional　overcurrent　protection.　The　effectiveness　and　accuracy　of　the　proposed　solution　are　validated　through　simulation　systems,　and　preliminary　experiments　are　conducted.　Results　demonstrate　that　the　proposed　limiter　effectively　curtails　fault　currents,　reducing　fault　current　interruption　by　at　least　90%　compared　to　existing　fault　isolation　methods.　This　successful　implementation　of　the　coordinated　strategy　ensures　the　avoidance　of　converter　station　lockouts　and　guarantees　the　system’s　power　supply　reliability.　©　2024　Power　System　Technology　Press.　All　rights　reserved.