In　areas　where　there　are　no　control　centers　or　communication　devices　are　unsound,　real-time　inertia　is　hard　to　obtain,　and　validity　of　system　adaptive　under-frequency　load　shedding　(UFLS)　scheme　will　be　affected.　Therefore,　an　optimal　adaptive　load　shedding　scheme　(ALSS)　is　proposed　only　based　on　local　load　information.　Meanwhile,　the　requirements　of　the　UFLS　scheme　for　communication　conditions　and　dependence　on　control　center　are　reduced.　Firstly,　a　method　for　real-time　identification　of　virtual　equivalent　inertia　of　load　is　proposed　according　to　the　load　response　information　after　disturbance.　Then,　a　real-time　calculation　method　of　local　power　shortage　is　derived.　Finally,　an　ALSS　without　control　center　is　proposed　according　to　estimated　local　power　shortage　based　on　frequency　response　model.　Finally,　accuracy　of　the　proposed　real-time　identification　method　of　virtual　equivalent　inertia　and　validity　of　ALSS　are　verified　with　simulation　carried　out　in　island　system　under　IEEE　39-bus　system.　©　2019,　Power　System　Technology　Press.　All　right　reserved.