With　the　increasing　proportion　of　distributed　power　in　power　grid,　the　system　has　problems　such　as　reduced　mechanical　inertia　and　excessive　frequency　shift　during　load　disturbance.　In　order　to　solve　these　problems,　some　scholars　have　proposed　the　concept　of　Virtual　Synchronous　Generator　(VSG)　to　make　the　inverter　simulate　the　characteristics　of　traditional　synchronous　generators.　A　complete　parameter　analysis　in　different　working　conditions　are　carried　out　in　this　paper.　According　to　the　different　effects　of　rotational　inertia　and　damping　on　the　dynamic　response　of　output　power,　a　new　self-adaptive　inertia　and　damping　control　to　improve　system　dynamics　is　proposed　by　changing　the　values　of　inertia　and　damping　in　different　stages　of　power　angle　response.　Simulation　results　verify　its　superiority　over　traditional　VSG　control　and　the　classic　bang-bang　control.　©　2020　IEEE.