The　number　of　eleetrieal　safety　aeeidents　is　inereasing　year　by　year　due　to　the　aging　or　miscon-figuration　of　eleetrieal　wiring,　and　AC　are　faults　are　an　important　eausative　faetor　of　eleetrieal　fires.　Con-sidering　the　eomplex　faetors　such　as　the　nature　of　AC　eurrent,　load　type,　ete.,　a　single-wire　self-compensating　are　fault　detection　method　based　on　impedance　matching　was　proposed　to　realize　the　universal　detection　of　faulty　arcs.　The　influencing　faetors　of　eurrent　coupling　signals　in　eleetrieal　lines　were　ana-lyzed　in　detail,　and　the　line　eurrent　coupling　flux　was　simulated　and　analyzed　to　verify　the　anti-interfer-ence　of　the　coupling　signals.　Matching　induetance　on　the　vice　side　of　the　transformer　and　the　line　equiva-lent　cireuit　were　used　to　achieve　parallel　resonance,　so　that　the　transformer　can　be　in　a　specific　high-fre-quency　band　signals　passing　through　the　larger　eleetrieal　signals　induced　by　the　theoretical　calculations　to　determine　the　applicability　of　the　method,　and　the　arrangement　of　the　resonant　test　platform　for　verifica-tion.　The　prototype　was　designed　to　be　tested　and　verified　in　the　arc　fault　experimental　platform,　and　the　results　show　that　the　scheine　can　effectively　extract　the　arc　fault　characteristics,　distinguish　the　load　Start　high-frequenoy　harmonics　from　the　fault　high-frequenoy　harmonics,　and　realize　the　real-time　and　aoourate　judgment　of　all　types　of　arc　faults　speoified　in　GB　14287.4—2014.　©　2025　Editorial　Department　of　Electric　Machines　and　Control.　All　rights　reserved.