The　treatment　of　the　neutral　point　is　essential　for　the　distribution　networks.　The　resonant　grounding　system　(RGS)　is　prone　to　generate　the　neutral　point　overvoltage　caused　by　the　low　reactance　of　the　arc　suppression　coil　(ASC),　which　harms　the　operation　of　equipment　and　personal　safety.　The　traditional　passive　neutral　point　overvoltage　suppression　strategies　have　poor　adaptability,　which　do　not　meet　the　demands　of　increasing　complexity　of　the　distribution　network　lines.　Therefore,　we　present　a　neutral　point　overvoltage　suppression　method　based　on　backstepping　control　(BSC)　with　DC　suppression.　The　BSC　that　prevents　perturbation　of　system　parameters　achieves　the　neutral　point　overvoltage　suppression.　A　DC　suppression　loop　is　constructed　to　realize　the　injection　current　DC　suppression　of　the　cascaded　H-bridge　(CHB)　inverter,　which　is　directly　connected　to　the　neutral　point　of　the　distribution　networks.　Simulation　results　verifies　the　effectiveness　of　neutral　point　overvoltage　suppression　based　on　BSC　and　the　feasibility　of　DC　suppression　of　injection　current.　©　2021　IEEE.