Lm Glasfiber A/s

Lm Wp Patent Holding A/s

Lm Wind Power A/s

Lm Wind Power International Technology Ii Aps

Lars Bo Hansen

Morten Dahl

Lars Tilsted Lilleheden

Karsten Schibsbye

Mark Hancock

Jesper Madsen

Casper Kildegaard

Shuai Zhang

Mathilde Aubrion

Richard Baker

Jeremy Hurault

Flemming Møller Larsen

Ole Kiel Jensen

Guannan Wang

Dongke Sun

Knud Møller Andersen

Madhusudhan Nanjedevanapura Veerappa

Christian Elkjaer-Holm

Christian Gjerlevsen

Flemming Moeller Larsen

Gert FRØLUND Pedersen

A wind turbine blade includes: an aerodynamic shell body with a suction side shell part and a pressure side shell part that extends in a longitudinal direction between a root and a tip and in a transverse direction between a leading edge and a trailing edge, and a de-icing system. The de-icing system includes: a number of heating layers each having electrically conductive fibres extending substantially in the longitudinal direction of the wind turbine blade along a longitudinal section of the aerodynamic shell body to provide resistive heating to the longitudinal section of the aerodynamic shell body; a number of metallic patches including a first metallic patch, the number of metallic patches being arranged to contact at least the number of heating layers; and a conductor cable that is electrically connected to the number of metallic patches and further is configured for electrically connecting to a power source.

Wind turbine blade having a de-icing system

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.

Noise reduction element and a wind turbine blade comprising a noise reduction element

The present invention relates to a wind turbine blade comprising a lightning protection system with at least one tip end lightning receptor arranged at an outer surface of the blade and a down conductor extending within the blade. The blade comprises carbon fibre reinforced spar caps, wherein electrically conductive meshes are connected between the respective tip end of each spar cap to the tip end lightning conductor.

Spar cap assembly for a wind turbine blade with a lightning protection system

The invention relates to a wind turbine blade being a shell body made of a composite material and having a root end and a tip end, an outer surface, a pressure side and a suction side, a trailing edge and a leading edge, and additionally a lightning protection system. The lightning protection system comprising at least one lightning receptor provided with an outer surface arranged freely accessible in, on or at the outer surface of the blade at the tip end of the blade and a lightning conductor made of electrically conductive material extending within the shell body along substantially the entire longitudinal direction of the blade. The lightning receptor and the lightning conductor are electrically connected by means of a connection area. At least a part of the outer surface, optionally the whole of the outer surface of the receptor being freely accessible is formed of carbon such as graphite.

Wind turbine blade with lightning protection system

Disclosed is a wind turbine blade with a connecting element for a lightning protection system of the wind turbine blade. The connecting element comprising: a root end part configured to be mechanically and electrically connected to a root region of the wind turbine blade; and a conductor part comprising a first conductor part and a second conductor part, wherein the first conductor part is configured to receive and electrically connect to a stripped part of the down conductor and the second conductor part is configured to receive and mechanically connect to an insulated part of the down conductor.

Connecting element for a lightning protection system of wind turbine blade

Disclosed is a wind turbine blade comprising a shell body, a down conductor arranged in the shell body for conducting lightning current to ground, an electrical connector arranged in electrical connection with the down conductor, a lightning receptor element arranged at a surface of the shell body or outside the shell body, the lightning receptor element being in electrical connection with the electrical connector. A method for manufacturing a wind turbine blade with a lightning protection system is also provided.

Wind turbine blade lightning protection system

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.

Wind turbine with lightning protection system

A wind turbine blade is described having a lightning protection system, wherein the lightning protection system is arranged to protect conductive elements or modules used in or on the blade. In one aspect, the lightning protection system comprises a conductive band to be arranged around the circumference of the blade at the location of an internal conductive module, to prevent a lightning strike from penetrating the blade and potentially damaging the internal module. In another aspect, the lightning protection system comprises a lightning down-conductor having a signal-carrying structure, e.g. a signal cable, power cable, or a waveguide, integrated into the down-conductor. In a further aspect, the lightning protection system comprises at least one lightning receptor arranged to protect externally-mounted antennas from lightning strikes.

Lightning protection system for a wind turbine blade

A wind turbine blade is described having a lightning protection system wherein a lightning down conductor is conductively coupled to at least one blade root bushing provided at the root end of the blade. The use of the blade root bushing as part of the conductive path of the lightning protection system allows for a structurally sound and reliable connection of an internal down conductor to an external lightning protection system and/or to a suitable ground connection at the blade root end.

Wind turbine blade having a conductive root bushing

A wind turbine blade is described having a lightning bypass system located at the root end of the blade. The lightning bypass system comprises a stay bolt formed from an electrically insulating material having a conductive core. The conductive core of the stay bolt provides a conductive path for a lightning down conductor system through the root end of a wind turbine blade to the turbine hub or nacelle, bypassing any sensitive root end components of the wind turbine blade.

Wind turbine blade lightning bypass system

A wind turbine blade with a lightning protection for a blade with a shell body has at least one lightning receptor arranged freely accessible in or on a surface of the shell body surface, and a lightning down conductor electrically connected to the lightning receptor and comprising an inner conductor made of electrically conductive material imbedded in a bedding insulation made of an electrically non-conductive material. The lightning down conductor further includes a first conductive layer having a resistance in the range of 10 to 10,000 Mega Ohm per meter (M&#x3a9;/m). The first conductive layer is located in a transverse distance from the inner conductor and being electrically isolated from the inner conductor.

The invention relates to a wind turbine blade with a lightning protection system, the lightning protection system comprises at least one lightning receptor arranged freely accessible in or on the shell unit surface at or in the immediate vicinity of the tip of the blade. The lightning protection system further comprises a lightning down conductor made of electrically conductive material extending within the shell body from the lightning receptor to the root end of the blade. The lightning receptor and the lightning down conductor are electrically connected. The shell body comprises at least a first conductive layer extending along at least a longitudinal part of the lightning down conductor in a transverse distance therefrom. The first conductive layer is electrically isolated from the lightning down conductor and from the lightning receptor, and has a sheet resistance in the range 1-5 Mega Ohm per square.

Wind turbine blade with a lightning protection system

The present invention concerns a method of producing a lightning diverter for conducting a lightning-induced electrical current, which is to be placed on structures such as wings on wind turbines, aircraft components, radomes and the like with the purpose of lightning protection. The method comprises the steps of making a plurality of holes in a plate of an electrically conductive material, filling said holes at least partly with one or more electrically non-conductive materials, and then finally dividing the plate&#x2014;preferably into strips. The lightning diverter obtained hereby consists of a layer of electrically non-conductive material with a plurality of isolated segments of electrically conductive material. The invention further relates to a diverter strip with isolated segments of concave shapes being advantageous because of the good connection between the segments and the non-conductive material.

Lightning diverter for conducting a lightning-induced electrical current and a method of producing the same

The invention relates to a lightning protection system for a wind turbine blade, where the blade is a shell body made of a composite material and comprises a root area and a tip end. The lightning protection system comprises at least one lightning receptor arranged freely accessible in or on the shell unit surface on or in the immediate vicinity of the tip of the blade, and a lightning conductor made of electrically conductive material extending within the shell body along substantially the entire longitudinal direction of the blade. The lightning receptor and the lightning conductor are electrically connected by means of a connection area. The lightning conductor in its entire longitudinal direction as well as the connection area between the lightning conductor and the lightning receptor are electrically insulated in order to prevent lightning striking through the surface of the blade.

A method of manufacturing a fiber-reinforced blade for a wind energy plant is presented, which blade is configured with at least a blade shell and means for conducting to a lightning current to an earth connection. Novel aspects of the method comprise that the blade is provided with segmented conductor means that are configured for conducting a lightning current outside the blade to the means for conducting to earth; and wherein the conductor means are distributed and secured at the external surface of the blade shell in such a manner that the conductor means are essentially flush with the external surface of the blade shell. When the segmented conductor means are distributed and attached at the external surface of the blade shell, the lightning current will not have to be conducted through the conductor means, but rather they are conducted in a ionised passage in the air above the conductor means.

Growing community of inventors

Agerskov, Denmark

Lars Bo Hansen