With　the　increasing　application　of　power　electronic　equipments　such　as　static　reactive　power　compensation　devices,　flexible　arc　suppression　devices　and　high-power　inverters,　the　development　of　flexible　distribution　network　has　been　accelerated.　However,　the　existing　power　electronic　equipments　have　problems　such　as　single　function　and　high　cost.　Based　on　the　direct-connected　cascaded　H-bridge　converter　connected　in　parallel　with　the　energy　storage　element　at　DC　side,　and　combining　the　multi-variable　decoupling　control　method　with　current　arc　suppression　method,　the　output　current　of　the　flexible　power　electronic　equipment　can　be　independently　adjusted　in　the　dq0　coordinate　system.　Thereby,　a　single　set　of　flexible　power　electronic　equipment　can　be　integrated　with　bidirectional　active　and　reactive　power　flow　control　of　the　distribution　network,　and　flexible　arc　suppression　of　single-phase　grounding　fault,　which　will　effectively　improve　the　utilization　efficiency　of　power　electronic　equipments.　Theoretical　analysis　and　simulative　results　of　power　control　and　single-phase　grounding　fault　arc　suppression　modeling　verify　the　feasibility　of　the　proposed　method.　©　2021,　Electric　Power　Automation　Equipment　Press.　All　right　reserved.