Wind turbine blade

A wind turbine and blade technology, applied in the field of wind turbine blades, can solve the problems of accumulation and damage to the wind turbine blades of a lightning protection system, etc.

Active Publication Date: 2013-09-25
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using such a cable network is that even if the current of a lightning strike is transmitted to several down conductors, the current in each conductor may still be very high, so a lot of heat may accumulate in said conductors
This heat can damage the lightning protection system itself and the surrounding materials of the wind turbine blades

Method used

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  • Wind turbine blade
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Examples

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Embodiment Construction

[0036] figure 1 A side view of a wind turbine blade 10 comprising a tip end region 11 and a root end region 12 is shown. The wind turbine blade 10 also has a lightning protection system comprising two metal foils 13a, 13b made of copper extending from the blade tip region 11 of the blade 10 to the The root end region 12 extends continuously along its longitudinal direction. Metal foils 13a, 13b are arranged at the outside of the outer blade layer 14 of the blade 10 and radially behind the spar caps 17a, 17b (cf. image 3 ), the spar caps 17a, 17b are arranged on the underside of the outer blade layer 14 except for the tip region 11 of the blade 10 . In the tip region 11 of the blade 10, metal foils 13a, 13b are arranged inside the blade 10 and are therefore shown in dashed lines. The metal foils 13a, 13b are only covered by a thin protective layer so that they can be used as lightning receptors for lightning strikes. In this side view, the thin protective layer that normal...

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Abstract

The invention relates to a wind turbine blade for a wind turbine, having a tip end area and a root end area, and a lightning protection system, said lightning protection system comprising at least one metal foil, wherein said metal foil extends continuously from the tip end area to the root end area of the blade and wherein the metal foil is arranged in proximity to the outer surface of the blade, so that the metal foil is adapted to function as a receptor of a stroke of lightning and as a down conductor.

Description

technical field [0001] The invention relates to a wind turbine blade for a wind turbine, wherein the wind turbine blade comprises a lightning protection system. Background technique [0002] Due to their large size, wind turbines are very vulnerable to lightning strikes. In particular, wind turbine blades, which are the parts of the wind turbine that extend to the point of greatest distance from the ground and are constructed of weakly conductive materials, are at the highest risk of being struck by lightning. In the event of a lightning strike on a wind turbine blade, high currents are generated in the surrounding material, causing the material to overheat and become damaged. [0003] For the above reasons, wind turbines, especially wind turbine blades, are usually provided with lightning protection systems to protect them from lightning strikes. A typical lightning protection system consists of several lightning receptors arranged at the surface of the blade, and cables ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G13/00F03D11/00
CPCF03D80/30F05B2240/307H02G13/00Y02E10/72F03D1/0658F05B2240/30
Inventor 藤冈秀康J.奥尔沃特A.克里默
Owner MITSUBISHI HEAVY IND LTD
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