Proposed is a wind turbine blade with a lightning protection receptor. The wind turbine blade with a lightning protection receptor is a technology that allows for excellent lightning capture rate for both negative and positive lightning by improving lightning measures for conventional wind turbines, which are vulnerable to positive lightning, in line with the increasing wind turbine heights for large-scale power generation and the trend toward offshore wind power, and that minimizes post-repair/supplementary measures by limiting blade damage/coating peeling due to lightning strikes to a narrow area, unlike in the conventional case where damage or peeling of the coating occurs over the entire area of a blade when struck by lightning on an edge wire inserted into the lateral inner side of the blade.

A root portion for a wind turbine blade is provided, including: an inner wall, an outer wall, a filler, an inner volume, mounting inserts, and a transversal holding arrangement, wherein the transversal holding arrangement includes at least one inlay beam extending from the inner wall and/or the outer wall into a mounting insert hole of at least one mounting insert for holding the mounting insert in the root portion during operation of the wind turbine blade, and wherein the mounting insert hole is a through hole and the at least one inlay beam extends from the inner wall through the mounting insert hole to the outer wall. A wind turbine blade with the root portion, a method of producing the root portion and a method for modifying a root portion is further provided.

Wingtip shields are described. In one embodiment, a wingtip shield includes an inner surface facing a high-pressure side of an airfoil. The airfoil is attached to the main body. The wingtip shield also includes an outer surface configured opposite from the inner surface. The wingtip shield is attachable to the airfoil along a peripheral edge of the airfoil from a first point of a leading edge of the airfoil to a second point of a trailing edge of the airfoil. A first span distance from the first point at the leading edge to the main body is less than a second span distance of the second point at the trailing edge to the main body.

Wingtip shields are described. In one embodiment, a wingtip shield includes an inner surface facing a high-pressure side of an airfoil. The airfoil is attached to the main body. The wingtip shield also includes an outer surface configured opposite from the inner surface. The wingtip shield is attachable to the airfoil along a peripheral edge of the airfoil from a first point of a leading edge of the airfoil to a second point of a trailing edge of the airfoil. A first span distance from the first point at the leading edge to the main body is less than a second span distance of the second point at the trailing edge to the main body.

There is provided a wind turbine blade having a root end, a tip end, a blade shell, a lightning protection system and an integrated web-down conductor. The integrated web-down conductor comprises: a down conductor forming part of the lightning protection system: electrical insulation surrounding the down conductor; and a web that surrounds the electrical insulation so as to enclose the down conductor and electrical insulation and is coupled to the blade shell.

Wingtip shields are described. In one embodiment, a wingtip shield includes an inner surface facing a high-pressure side of an airfoil. The airfoil is attached to the main body. The wingtip shield also includes an outer surface configured opposite from the inner surface. The wingtip shield is attachable to the airfoil along a peripheral edge of the airfoil from a first point of a leading edge of the airfoil to a second point of a trailing edge of the airfoil. A first span distance from the first point at the leading edge to the main body is less than a second span distance of the second point at the trailing edge to the main body.

A root portion for a wind turbine blade is provided, including: an inner wall, an outer wall, a filler, an inner volume, mounting inserts, and a transversal holding arrangement, wherein the transversal holding arrangement includes at least one inlay beam extending from the inner wall and/or the outer wall into a mounting insert hole of at least one mounting insert for holding the mounting insert in the root portion during operation of the wind turbine blade, and wherein the mounting insert hole is a through hole and the at least one inlay beam extends from the inner wall through the mounting insert hole to the outer wall. A wind turbine blade with the root portion, a method of producing the root portion and a method for modifying a root portion is further provided.

Wingtip shields are described. In one embodiment, a wingtip shield includes an inner surface facing a high-pressure side of an airfoil. The airfoil is attached to the main body. The wingtip shield also includes an outer surface configured opposite from the inner surface. The wingtip shield is attachable to the airfoil along a peripheral edge of the airfoil from a first point of a leading edge of the airfoil to a second point of a trailing edge of the airfoil. A first span distance from the first point at the leading edge to the main body is less than a second span distance of the second point at the trailing edge to the main body.

Proposed is a wind turbine blade with a lightning protection receptor. The wind turbine blade with a lightning protection receptor is a technology that allows for excellent lightning capture rate for both negative and positive lightning by improving lightning measures for conventional wind turbines, which are vulnerable to positive lightning, in line with the increasing wind turbine heights for large-scale power generation and the trend toward offshore wind power, and that minimizes post-repair/supplementary measures by limiting blade damage/coating peeling due to lightning strikes to a narrow area, unlike in the conventional case where damage or peeling of the coating occurs over the entire area of a blade when struck by lightning on an edge wire inserted into the lateral inner side of the blade.

The present disclosure relates to a method of optimizing a rotor blade of a wind turbine, wherein said rotor blade extends from a rotor-blade coupling to a rotor-blade tip in a rotor-blade longitudinal direction with a rotor-blade length, having an aerodynamical profile extending between a leading edge and a trailing edge, wherein said method comprises the following steps: designing of said rotor blade for design environmental conditions including at least one design air density, with said designing comprising providing a sound-protection means, the sound protection means comprising at least one bristle, within a blade external region of said rotor blade the latter being defined as the 50% of said rotor-blade length abutting said rotor-blade tip; providing an air density at the installation site of said wind turbine; comparing said air density with said design air density; and increasing the induction factor by increasing a density factor of said sound-protection means when said air density is lower than said design air density.