A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least one auxiliary unit. To increase flexibility and improve assembly and maintenance procedures of the wind turbine, the auxiliary unit comprises at least two sub units each accommodating at least one wind turbine component, e.g. a converter or a transformer. The sub units are attached individually to the main unit or they are joined and attached as one component to the main unit.

A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least one auxiliary unit. The auxiliary unit accommodates a at least one component, e.g. a converter or transformer. To provide efficient transportation, lower costs and easier assembly, the operative component is suspended directly on the main unit.

A nacelle that forms part of a wind power installation and is configured to be installed on a tower of the wind power installation, has an installation transformer that is configured to transform electrical power generated by the wind power installation for feeding into a medium-voltage grid, and has an electrical interface for connecting at least one medium-voltage line, wherein the line runs through the tower of the wind power installation into the nacelle, and also has a pulling device that is installed in the nacelle and comprises a pulling means, which is configured to pull the line into the nacelle for connection to the electrical interface, and has a supporting structure that is installed in the nacelle, has a receiving region for the pulling means or the line and is configured to keep the line within a predetermined bending radius in the receiving region. The supporting structure has a number of rollers that are mounted on the supporting structure so as to be able to move back and forth between an advanced, first position and a retracted, second position, wherein, in the first position, the number of rollers extend further into the receiving region than in the second position.

A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least two auxiliary units. To increase flexibility and improve assembly and maintenance procedures of the wind turbine, the auxiliary unit comprises at least two auxiliary units each accommodating at least one wind turbine component, e.g. a converter or a transformer. The auxiliary units are attached individually to the same wall of the main unit, e.g. to a side wall or a rear wall.

The present invention relates to pitch actuation of pitch-adjustable rotor blades of a three-bladed wind turbine in a situation where one blade load sensor is unavailable. Based on blade load signals and an availability signal for each of the blade load signals, combined load signals are constructed based on the available blade load signals. The combined load signals are determined based on application of a high pass filter to the blade load signals and a transform of the blade load signals to an intermediate coordinate frame, wherein, in the transform, the unavailable blade load signal is replaced with an estimated signal. A control action is performed using the combined load signals, and the resulting pitch modification signals are applied to the pitch actuator.

A wind turbine includes a generator driven by an aerodynamic rotor; a first power converter arranged in a nacelle supported by an electrically grounded tower; a second power converter arranged at the base of the tower; a DC transmission link extending through the wind turbine tower and connected between the first power converter and the second power converter; wherein a first current path between the power converters through the DC transmission link; and a second current path between the power converters through electrically grounded metal of the tower. A method of connecting a DC transmission link in the tower of a wind turbine is also provided.

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, and an electrolytic unit electrically powered by the generator to produce hydrogen from an input fluid, in particular water, wherein the electrolytic unit is electrically coupled to the generator by an electric connection, wherein the electrolytic unit is housed inside the tower.

The present disclosure relates to methods for extracting transformers from nacelles of wind turbines. The methods comprise moving a cart along a guide system, wherein the cart carries the transformer, and wherein the guide system comprises a first guide part arranged inside the nacelle, and a second guide part extending through an opening in the nacelle and beyond a first end of the nacelle. The method further comprises moving the transformer along the second guide part to position the transformer outside of the nacelle. Nacelles and wind turbines suitable for such methods are also disclosed.

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, a moving device and a system for moving a yaw drive in a wind turbine is provided.