With　the　large-scale　connection　of　direct-drive　wind　turbine　(WT)　to　the　power　grid,　the　proportion　of　installed　capacity　and　rotational　inertia　of　traditional　power　grids　have　been　reduced,　and　the　dynamic　support　capacity　of　the　power　grid　has　been　relatively　weakened,　which　increase　the　difficulty　of　system　inertia　effect　control　and　steady-state　mechanism　analysis.　In　this　paper,　a　DC　voltage　droop　control　strategy　under　high-frequency　components　is　proposed.　This　control　method　can　play　a　positive　role　in　reducing　the　grid　frequency　deviation　and　to　promoting　the　analysis　of　the　rate　of　change　of　frequency.　Firstly,　a　static　synchronous　generator　(SSG)　mathematical　model　of　a　wind　power　system　is　established　by　analogy　to　the　dynamic　analysis　theory　and　method　under　the　traditional　electromechanical　time　scale.　Secondly,　from　the　perspective　of　DC-voltage　timescale　(DVT)　dynamic　characteristics　analysis　and　control,　the　inertia,　damping　and　synchronization　effects　of　the　WT　are　studied,　and　the　mathematical　expressions　of　the　system　equivalent　parameters　are　derived.　Finally,　through　the　comparison　between　conventional　droop　control　and　high-frequency　component　droop　control,　the　advantages　and　disadvantages　can　be　obtained,　subsequently,　the　effectiveness　of　the　high-frequency　droop　control　on　the　DC　side　and　the　correctness　of　the　analysis　conclusion　can　be　verified　through　simulation.　©　Published　under　licence　by　IOP　Publishing　Ltd.