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Lightning protection for a wind turbine blade

A technology of wind turbines and blades, applied in the field of lightning protection

Pending Publication Date: 2021-06-01
LM WIND POWER AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It also makes it easier to transport wind turbine blades

Method used

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  • Lightning protection for a wind turbine blade
  • Lightning protection for a wind turbine blade
  • Lightning protection for a wind turbine blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] Figures are not necessarily drawn to scale unless otherwise indicated.

[0074] figure 1 A conventional modern upwind wind turbine 2 according to the so-called "Danish concept" is illustrated with a tower 4, a nacelle 6 and a rotor with a substantially horizontal rotor axis. The rotor comprises a hub 8 and three blades 10 extending radially from the hub 8 , each blade having a blade root 16 closest to the hub and a blade tip 14 furthest from the hub 8 . The invention is not limited to use in this type of wind turbine.

[0075] figure 2 A schematic view of an exemplary wind turbine blade 10 is shown. The wind turbine blade 10 has the shape of a conventional wind turbine blade, has a root end 17 and a tip end 15, and includes a root region 30 closest to the hub, a forming or airfoil region 34, and 34 between transition areas 32 . The blade 10 includes a leading edge 18 and a trailing edge 20 , the leading edge 18 facing the direction of rotation of the blade 10 when...

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Abstract

Disclosed is a wind turbine blade comprising a first blade section and a second blade section connected to the first blade section. The wind turbine blade comprises a first down conductor for conducting lightning current to ground. The blade further comprises one or more lightning receptors at or in proximity of an external surface of the wind turbine blade. A smallest distance from a first lightning receptor of the one or more lightning receptors to an interface between the first blade section and the second blade section may be less than or equal to a chord length of a chord of the wind turbine blade at the interface between the first blade section and the second blade section.

Description

technical field [0001] The present disclosure relates to lightning protection of wind turbine blades, and more particularly, the present disclosure relates to lightning protection of wind turbine blades comprising a first blade section and a second blade section, and optionally comprising More blade segments. Background technique [0002] As wind turbines and wind turbine blades increase in size, the risk of lightning strikes to wind turbines increases. It is therefore of increasing interest to provide wind turbines and especially wind turbine blades with lightning protection measures. [0003] It is known to provide blades for wind turbines with lightning receptors, inside the blades, in electrical connection with metallic down conductors capable of conducting the lightning current to earth. [0004] Wind turbine blades of fibre-reinforced polymers and in particular the aerodynamic shells of wind turbine blades are usually manufactured in a mould, wherein the pressure sid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06F03D80/30
CPCF03D1/0675F03D80/30F05B2240/302Y02E10/72F05B2240/307F03D1/0677F03D80/301
Inventor M·奥布里翁B·埃里克松
Owner LM WIND POWER AS
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