Lightning　strokes　may　make　traveling　wave　protection　work　incorrectly　and　lightning　recognition　method　is　important　after　starting.　Lightning　energy　transmits　through　ground　lines,　DC　lines　and　towers　at　the　same　time.　Because　of　different　coupling　coefficient　with　the　two　DC　lines,　the　magnitudes　of　induced　current　in　ground　model　and　line　model　network　are　different　relatively　in　specific　lightning　occasions.　Lightning　faults　not　only　share　same　features　with　lightning,　but　also　are　accompanied　with　sudden　changes　of　induced　current　circuits,　which　make　sudden　changes　of　ground　model　and　line　model　current.　After　the　analysis　of　the　additional　current　components　of　ground　model　and　line　model,　this　paper　created　different　criterions　by　using　magnitudes　and　ratio.　Large　numbers　of　EMTDC　simulation　results　demonstrate　the　correctness　and　effectiveness　of　this　method.　©　2018　Chin.　Soc.　for　Elec.　Eng.