Aiming　at　the　poor　voltage　response　characteristics　of　the　line-committed　converter-based　high　voltage　direct　current　(LCC-HVDC)　transmission　system　after　the　fault　of　the　AC　system　at　the　inverter　side,　this　paper　analyzes　the　relationship　between　the　continuous　commutation　failure　of　the　LCC-HVDC　transmission　system　and　the　reactive　power　demand　in　detail　from　the　perspective　of　the　reactive　power　voltage　of　the　inverter　side　converter.　On　this　basis,　an　improved　control　method　for　the　virtual　synchronous　generator　(VSG)　of　the　energy　storage　system　is　proposed　to　enhance　the　commutation　ability　of　the　LCC-HVDC　transmission　system,　to　suppress　continuous　commutation　failure.　Firstly,　secondary　frequency　regulation　is　added　to　the　active　power　frequency　control　of　the　traditional　VSG　to　improve　the　stability　of　the　system　converter　bus　frequency.　Secondly,　the　leading　trigger　angle　negative　feedback　control　is　added　to　the　traditional　VSG　control,　so　that　the　system　has　the　advantages　of　rapid　reactive　power　output　and　voltage　recovery.　At　the　same　time,　different　control　modes　are　selected　according　to　the　fault　location　and　size　to　improve　the　recovery　ability　and　robustness　of　the　system.　Finally,　based　on　the　CIGRE　benchmark　LCC-HVDC　transmission　system　model,　the　improved　method　is　proven　to　have　a　good　suppression　effect.　The　results　can　provide　a　reference　for　actual　projects.