Active　arc　suppression　device　is　proposed　for　arc　suppression　of　single-line-to-ground　fault　in　distribution　networks.　Different　from　the　passive　Peterson　coil,　it　needs　a　reliable　fault　status　identification　method　to　realize　the　secure　exit　of　the　device　as　ground-fault　arc　is　extinguished.　To　improve　the　self-healing　ability　of　the　distribution　network,　this　paper　proposes　a　flexible　arc　suppression　method　based　on　double　closed-loop　control　and　fault　status　identification,　which　directly　controls　the　neutral　point　voltage　of　distribution　network.　The　reignition　of　fault　arc　can　be　suppressed　by　flexible　arc　suppression　device　(FASD).　Through　actively　reducing　the　neutral　point　voltage,　the　ground-fault　resistance　is　calculated　to　identify　fault　status　after　FASD　is　put　into　operation.　The　purpose　of　the　reliable　exit　of　FASD　can　be　achieved.　In　the　meantime,　a　double　closed-loop　controller　based　on　second-order　generalized　integrator　frequency-locked　loop　and　proportional　complex　integral　is　designed,　which　can　adaptively　track　the　grid　frequency　and　effectively　limit　the　ground-fault　current　and　voltage.　The　simulation　results　verify　that　the　method　can　realize　quick　suppression　of　fault　arc　and　reliable　exit　of　FASD　under　different　types　of　SLG　fault.　©　2021　IEEE.