The　existing　integrated　converters　have　had　such　problems　as　being　unable　to　perform　reactive　power　compensation　and　fault　suppression　at　the　same　time,　having　high　voltage　at　both　ends　of　the　bridge　arms,　reacting　slowly　in　dynamic　response,　and　being　hard　to　suppress　the　arc　ground　faults,　and　so　on.　Therefore,　a　new　structure　of　the　integrated　converter　with　fault　suppression　and　reactive　power　compensation　functions　and　its　control　strategy　are　proposed.　Firstly,　by　analyzing　the　topology　and　working　principle　of　the　integrated　converter,　a　new　topology　of　four-leg　cascaded　H-bridge　converter　is　proposed.　In　this　structure,　its　three-phase　bridge　arms　are　star-connected　for　reactive　power　compensation.　A　grounding　bridge　arm　composed　of　a　single-phase　cascaded　H-bridge　converter　is　added　between　the　star　connection　point　and　the　earth　to　provide　support　for　the　DC　side　voltage　control　of　the　converter,　realizing　the　quick　and　complete　compensation　of　the　ground　fault　current.　Secondly,　based　on　the　analysis　of　the　principle　and　interaction　mechanism　of　the　reactive　power　compensation,　the　fault　suppression　and　the　DC　side　voltage　stability　control,　a　cooperative　control　strategy　is　proposed.　Finally,　the　simulation　verification　of　the　proposed　integrated　converter　and　control　strategy　is　carried　out　with　the　PSCAD/EMTDC　software.　The　results　show　that　the　fault　suppression　and　reactive　power　compensation　can　be　performed　at　the　same　time　when　there　is　no　independent　power　supply　on　the　DC　side.　©　2022,　Power　System　Technology　Press.　All　right　reserved.