Method of lightning proofing a blade for a wind-energy plant

A technology for wind energy equipment and lightning protection, which is applied in the field of wind energy equipment and lightning protection blades, can solve problems such as damage, achieve good electrical connection, and avoid the effect of blade processing procedures
CN1867772AActive Publication Date: 2006-11-22LM GLASSFIBER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LM GLASSFIBER
Publication Date
2006-11-22

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Abstract

The invention relates to a method of lightning-proofing a blade (1) on a wind-energy plant, which blade comprises a blade shell (2) configured essentially as a fibre-reinforced laminate, which laminate comprises electrically conductive fibres, wherein the blade comprises at least one lightning arrester (9) configured for conducting lightning current, including preferably to ground. The method comprises that the electrically conductive fibres are connected to each other, and that at least one metallic receptor (4, 24, 25) is arranged for capturing lightning current at or in proximity of the external face of the blade; and that the receptor and the fibres are connected to the lightning arrester for equalising the difference in potential between the lightning arrester and the electrically conductive fibres. When the electrically conductive fibres are connected to each other, the fibres will cooperate on the conduction of a possible lightning current to prevent the current from running in individual fibres. Simultaneously the metallic receptor will serve as the primary lightning capturing device and reduce the risk of lightning striking the laminate. The receptor being connected to the lightning arrester, the current will predominately be conducted to ground, while the risk of transfer to the laminate is minimised in that a possible difference in potential between fibres and lightning arrester has been equalised.
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Description

technical field

[0001] The invention relates to a lightning protection method for a blade of a wind energy installation, said blade comprising a blade shell substantially constructed as a fibre-reinforced laminate containing electrically conductive fibers, wherein The blade comprises at least one lightning arrester configured to conduct lightning current, preferably to earth. Furthermore, the invention also relates to a lightning protection blade and a wind energy installation. Background technique

[0002] It should be known that blades for wind power installations are equipped with lightning receptors which are electrically connected inside the blades to a metallic lightning arrester capable of grounding the lightning current. An example of this is described in EP 0783629 B1, which is hereby incorporated by reference. Furthermore, it is known from WO 00 / 14405 to use carbon fibers in laminates for blades of wind energy installations. The disclosure content of this docume...

Claims

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