Due　to　the　low　line　impedance　of　the　DC　power　distribution　system,　the　current　rise　rate　is　high　when　the　line　is　short-circuited,　which　causes　problems　such　as　difficulty　in　current　limiting　and　slow　recovery　of　line　equipment.　This　paper　analyzes　the　current　problems　in　the　current-limiting　reactance　method　used　in　DC　distribution　networks,　and　proposes　a　new　method　for　active　current-limiting　control　of　short-circuit　current　using　power　electronic　transformer　equipment　in　the　distribution　network.　The　improvement　of　the　circuit　topology　and　the　active　current　control　method　can　realize　that　the　energy　in　the　internal　support　capacitor　of　the　converter　no　longer　produces　a　large　impact　on　the　line　when　a　short-circuit　fault　occurs,　and　can　quickly　track　and　control　the　current　in　the　distribution　network　line.　Renewable　energy　power　generation　equipment　achieves　current　control　requirements　during　low　voltage　ride-through.　Hardware-in-the-loop　experiments　verify　the　correctness　of　the　method　in　this　paper.　©　2022,　Electrical　Technology　Press　Co.　Ltd.　All　right　reserved.