A noise reduction element extends between a first end and a second end in a first direction. The noise reduction element extends between a third end and a fourth end in a second direction perpendicular to the first direction. The noise reduction element includes a base part configured to be attached to a trailing edge of a wind turbine blade. The base part has a first base part surface and a second base part surface. The base part extends between the first end and a first position in the first direction. The noise reduction element includes a first serration part having a serration pressure surface and a serration suction surface and extending in the first direction between the first position and the second end. The first serration part has a thickness in a third direction between the serration pressure surface and the serration suction surface.

A noise reduction element extends between a first end and a second end in a first direction. The noise reduction element extends between a third end and a fourth end in a second direction perpendicular to the first direction. The noise reduction element includes a base part configured to be attached to a trailing edge of a wind turbine blade. The base part has a first base part surface and a second base part surface. The base part extends between the first end and a first position in the first direction. The noise reduction element includes a first serration part having a serration pressure surface and a serration suction surface and extending in the first direction between the first position and the second end. The first serration part has a thickness in a third direction between the serration pressure surface and the serration suction surface.

Provided is a wind turbine including a generator enclosed in a generator housing, the generator housing including a rotating housing and a stationary housing, whereby the rotating housing is separated from the stationary housing by a first gap; a canopy mounted on a tower and including an electrical connection to a down conductor of the tower, wherein the canopy is separated from the generator housing by a second gap; a lightning current path provided by a plurality of brush assemblies mounted on the stationary housing, wherein a brush assembly includes a brush holder mounted on the stationary housing such that a carbon brush extends across the first gap to make electrical contact with the rotating housing; and an electrical connector extending across the second gap to electrically connect the brush holder to the canopy. Also provided is a method of providing a lightning current path for such a wind turbine.

Provided is a wind turbine including a generator enclosed in a generator housing, the generator housing including a rotating housing and a stationary housing, whereby the rotating housing is separated from the stationary housing by a first gap; a canopy mounted on a tower and including an electrical connection to a down conductor of the tower, wherein the canopy is separated from the generator housing by a second gap; a lightning current path provided by a plurality of brush assemblies mounted on the stationary housing, wherein a brush assembly includes a brush holder mounted on the stationary housing such that a carbon brush extends across the first gap to make electrical contact with the rotating housing; and an electrical connector extending across the second gap to electrically connect the brush holder to the canopy. Also provided is a method of providing a lightning current path for such a wind turbine.

Disclosed a wind turbine blade comprising a main laminate and a method for manufacturing a main laminate for a wind turbine blade. The wind turbine blade extends in a longitudinal direction from a root to a tip and comprising a pressure side, a suction side and a chord line extending between a leading edge and a trailing edge. Particularly, lightning protection of such main laminate is disclosed.

Disclosed a wind turbine blade comprising a main laminate and a method for manufacturing a main laminate for a wind turbine blade. The wind turbine blade extends in a longitudinal direction from a root to a tip and comprising a pressure side, a suction side and a chord line extending between a leading edge and a trailing edge. Particularly, lightning protection of such main laminate is disclosed.

A wind turbine (10) is disclosed having a hub (14) with electrical power therein and at least one blade (20) attached to the hub. The blade (20) has a blade root (21), a blade tip (26) and a down-wire (30) for the conduction of lightning current to the ground. The wind turbine (10) further has a blade electrical system (99) that takes electrical power from the hub (14) and transmits electrical power into the blade (20) to at least one area located between the blade root (21) and the blade tip (26). The blade electrical system (99) if formed by a power-transfer unit (100) having a power-driver unit (110), a power-conditioner unit (130) and a dielectric (120) separating the power-driver unit (110) and the power-conditioner unit (130). The power-driver unit (110) receives electrical power from the hub (14) and transmit the electrical power through the dielectric (120) to the power-conditioner unit (130). An electrical-power bus (200) is electrically attached to the power-conditioner unit (130) and extends into the blade (20). At least one powered unit (300) is provided which is electrically connected to, and electrically powered by, the electrical-power bus (200).

A wind turbine (10) is disclosed having a hub (14) with electrical power therein and at least one blade (20) attached to the hub. The blade (20) has a blade root (21), a blade tip (26) and a down-wire (30) for the conduction of lightning current to the ground. The wind turbine (10) further has a blade electrical system (99) that takes electrical power from the hub (14) and transmits electrical power into the blade (20) to at least one area located between the blade root (21) and the blade tip (26). The blade electrical system (99) if formed by a power-transfer unit (100) having a power-driver unit (110), a power-conditioner unit (130) and a dielectric (120) separating the power-driver unit (110) and the power-conditioner unit (130). The power-driver unit (110) receives electrical power from the hub (14) and transmit the electrical power through the dielectric (120) to the power-conditioner unit (130). An electrical-power bus (200) is electrically attached to the power-conditioner unit (130) and extends into the blade (20). At least one powered unit (300) is provided which is electrically connected to, and electrically powered by, the electrical-power bus (200).

Provided is a method for making a composite structure with exposed conductive fibers. The exposed conductive fibers can be used for static dissipation. In the present method, a liquid, gum, gel, or impermeable film mask is applied to the conductive fiber material. The mask functions to prevent infiltration of curable liquid resin into the conductive fiber material. The masked conductive fiber material is incorporated into the composite structure, along with structural fiber material. The liquid resin is cured. The mask material and cured resin are removed from the masked areas, thereby exposing the conductive fiber material. The exposed conductive fiber material can collect and drain electrostatic charges. The present method can be used to make storage tanks and other objects that require electrostatic charge dissipation.

The present invention relates to a wind turbine comprising a lightning protection system comprising a waveguide interconnecting a communication device and a signal-carrying structure. In other aspects, the present invention relates to the use of a waveguide in a lightning protection system of a wind turbine, a power splitter and its use in a lightning protection system of a wind turbine.