An adaptor (166) for interfacing between an endpiece (38) of a lifting apparatus (30) and a nacelle (14) of a wind turbine (10). The adaptor (166) includes a base plate (174) having projections (204) configured to engage the adaptor (166) to the nacelle (14) and first and second side legs (176, 178) extending away from the base plate (174) opposite the projections (204) that define a recess (202) configured to engage the adaptor (166) with the endpiece (38) of the lifting apparatus (30). The adaptor (166) further includes first and second set screws (208, 210) positionable in bores (212) of the first and second side legs (176, 178) and movable to laterally adjust the position the adaptor (166) relative to the endpiece (38) of the lifting apparatus (30). This allows the lifting apparatus (30) to lift a nacelle assembly (24) having a laterally offset centre of gravity (158) in a balanced manner. A method for handling multiple wind turbine (10) components, including a nacelle (14), through selective use of the adaptor (166) is also disclosed.

A wind turbine is provided including a generator, a base, a nacelle, a tower having a first end mounted to the base and a second end supporting the nacelle, an electrolytic unit electrically powered by the generator to produce hydrogen from an input fluid, in particular water, and a fluid supply assembly for supplying the input fluid from a fluid inlet arranged below a water level to the electrolytic unit arranged above the water level, wherein the hydrogen produced can be taken out of the wind turbine by the hydrogen output.

The invention relates to a wind turbine nacelle (2) configured for mounting on a wind turbine tower (3) and housing a rotor-supporting assembly supporting a rotor, the nacelle further housing a power conversion assembly, the nacelle comprising: a main unit (20, 101) arranged to be connected to the wind turbine tower (3) and housing the rotor-supporting assembly, and at least one auxiliary unit (21, 22, 102) housing an operative component (34, 35, 104) forming part of the power conversion assembly, wherein the main unit (20, 101) and the auxiliary unit (21, 22, 102) are separate units configured to be connected by a unit fixation structure at an interface, and wherein the at least one auxiliary unit has a first height in an assembled configuration and a second height in a transportation configuration, the first height being higher than the second height.

A method (100) of servicing or installing a component of a wind turbine (10) using a crane (50), the wind turbine (10) comprising a nacelle (16) and a rotor hub (20) coupled to the nacelle (16) and rotatable about a rotor axis, the method (100) comprising rotating the rotor hub (20) about the rotor axis to a first rotational position; lifting the crane (50) to the rotor hub (20) while the rotor hub (20) is positioned at the first rotational position; mounting the crane (50) to a mounting portion (21) of the rotor hub (20) while the rotor hub (20) is positioned at the first rotational position; and rotating the rotor hub (20) together with the crane (50) from the first rotational position to a second rotational position.

A method for installing or mounting a tower is formed by the stacking of two or more mounting groups on a base section. At least one of said mounting groups is formed by a plurality of stacked segments. Said method includes arranging the base section in the definitive position thereof on the ground and lifting and placing the mounting groups of the tower on the base section by means of a mounting crane that can adopt different jib configurations. Advantageously, in said method, at least two or more stacked segments are installed consecutively in the corresponding mounting group with one and the same crane jib configuration. The length of the lowest stacked segment of said mounting group is smaller than the length of at least another stacked segment of the aforementioned mounting group.

Wind turbine installation method the installation method including: providing a nacelle (2) at a wind turbine erection site, said nacelle (2) comprising: a main unit (20), arranged to be connected to the wind turbine tower (3), and configured for housing a rotor-supporting assembly of the wind-turbine: at least one auxiliary unit (21, 22) housing an operative component (34) forming part of the power conversion assembly, wherein: the main unit (20) and the auxiliary unit (21, 22) are separate units configured to be connected by a unit fixation structure at an interface, and wherein the operative component (34) is supportable directly on the main unit (20), said method further including: receiving a said main unit (20) and an auxiliary unit (21, 22) and an operative component (34) to said site of erection of the wind turbine, attaching to said main unit (20) the said auxiliary unit (21, 22) and said operative component (34). and attaching a lifting yoke (50) to the main unit (20) and hoisting the main unit (20) together with the auxiliary unit (21, 22) by means of a crane attached to the lifting yoke (50), wherein the auxiliary unit (21, 22) is supported and lifted by the main unit (20) during the hoisting, and installing the main unit (20) and the attached auxiliary unit (21, 22) at the tower top.

A main nacelle unit (22) for forming a nacelle (14) of a wind turbine (10) includes a main housing (28) having an outer wall (30a. 30b) and containing a base frame (52) configured to be attached to a tower (12) of the wind turbine (10). The main nacelle unit (22) also includes at least one support frame (56) configured to support a wind turbine component (54) external to the main housing (28). A portion of the support frame (56) is attached to the base frame (52) and movable between a stored position and a deployed position. In the stored position, the portion of the support frame (56) is configured to be positioned within the confines of the main housing (28), and in the deployed position, the portion of the support frame (56) is configured to extend through the main housing outer wall (30a. 30b) to support the wind turbine component (54) external to the main housing (28). A method of assembling a wind turbine using the support assembly is also disclosed.

A method of handling an auxiliary nacelle unit (24, 26) of a wind turbine (10) includes assembling a temporary hoist (52) on a main nacelle unit (22) by pivotally connecting a boom (64) to the main nacelle unit (22), pivotally connecting a mast (66) to the main nacelle unit (22), connecting the actuator (68) between the mast (66) and the boom (64), and routing a hoist cable (56) from a winch (54) to a hoist cable locator (60). The method further includes connecting the hoist cable (56) to an auxiliary nacelle unit (24, 26), activating the winch (54) to move the auxiliary nacelle unit (24, 26) from a first position to a second position, and activating the actuator (68) to move the boom (64) between the retracted position and the extend position. A lifting arrangement (50) for handling an auxiliary nacelle unit (24, 26) of a wind turbine (10) is also disclosed.

A method (100) of servicing or installing a component of a wind turbine (10) using a crane (50), the wind turbine (10) comprising a nacelle (16) and a rotor hub (20) coupled to the nacelle (16) and rotatable about a rotor axis, the method (100) comprising rotating the rotor hub (20) about the rotor axis to a first rotational position; lifting the crane (50) to the rotor hub (20) while the rotor hub (20) is positioned at the first rotational position; mounting the crane (50) to a mounting portion (21) of the rotor hub (20) while the rotor hub (20) is positioned at the first rotational position; and rotating the rotor hub (20) together with the crane (50) from the first rotational position to a second rotational position.

A modular jib crane for a nacelle for a wind turbine includes: a base element for attaching the crane to the nacelle, a pillar, wherein the pillar is coupleable with the base element at a first end of the pillar, and a first crane arm, wherein the first crane arm is coupleable with the pillar at a first end of the first crane arm, wherein at least one of the pillar and the first crane arm includes a plurality of modules coupleable with each other to form the pillar or first crane arm.