It　is　the　future　development　trend　of　large-scale　onshore　or　offshore　wind　farms　to　be　connected　to　the　grid　by　VSC-HVDC　(Voltage-Source-Converter-based　High-Voltage　Direct-Current　Transmission)　system.　In　order　to　ensure　the　fault　ride-through　capability　of　wind　farm　and　its　grid　connected　system,　energy　dissipation　devices　are　often　installed　in　the　DC　system.　Before　the　flexible　DC　transmission　system　equipped　with　DC　energy　dissipation　devices　is　put　into　operation,　it　is　necessary　to　carry　out　on-site　test　to　check　whether　the　functions　of　the　equipment　meet　the　requirements　of　operation.　However,　it　is　difficult　to　simulate　the　real　working　conditions　of　energy　dissipation　devices,　that　is,　to　provide　suitable　and　stable　DC　voltage.　Therefore,　this　paper　proposes　an　on-site　test　method　for　DC　energy　dissipation　device,　without　additional　test　equipment.　After　the　installation　of　relevant　equipment　on　field,　stable　DC　voltage　is　provided　through　the　AC　system　and　the　VSC　converter,　and　the　relevant　parameters　of　DC　energy　dissipation　device　are　changed　to　make　it　enter　the　switching　process,　so　as　to　test　its　functions　on　site.　The　on-site　test　method　is　verified　on　the　simulation　model　of　DC　energy　dissipation　devices　that　is　configured　in　an　offshore　wind　power　VSC-HVDC　project　on　the　RTDS　platform.　The　impact　of　different　control　parameters　on　the　switching　transient　process　is　studied,　and　the　optimized　scheme　to　set　the　relevant　parameters　is　given.　©　2021　IEEE.