Auxiliary structure for floating and sinking a whole offshore wind turbine with suction bucket foundation(s)

An auxiliary structure for floating and sinking a whole offshore wind turbine with at least one suction bucket foundation, the auxiliary structure being configured to be mounted on the offshore wind turbine, the offshore wind turbine comprising a support structure and a wind turbine generator system mounted on the support structure, the support structure comprising a tower barrel and the at least one suction bucket foundation mounted on a lower portion of the tower barrel, wherein the auxiliary structure comprises:

• an upper bracket floated on water, wherein the upper bracket comprises upper floating boxes, upper cross-connectors and an upper hoop, each of the upper cross-connectors is fixedly connected to the upper hoop and a corresponding one of the upper floating boxes, the upper hoop is configured to sleeve on an outer side of the support structure, the upper bracket and the support structure are movable relative to each other in an up and down direction, and the upper bracket and the support structure are connected in a manner of limiting position, so as to enable the upper bracket to right the support structure when the support structure is sunk;
• and
• a lower bracket sunk synchronously with the support structure, wherein the lower bracket comprises lower floating boxes, lower cross-connectors and a lower hoop, each of the lower cross-connectors is fixedly connected to the lower hoop and a corresponding one of the lower floating boxes, the lower hoop is capable of holding the support structure tightly, and a bottom of each of the lower floating boxes is adjustable in height.