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Charge enabled lightning protection system for wind rotor blades and wind rotor blades therewith

A lightning protection system and wind rotor blade technology, applied in the field of wind rotor blades, can solve problems such as low possibility and blade material breakdown

Inactive Publication Date: 2011-11-30
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to this fact, the probability of a direct lightning strike entering the air receptor is relatively low
As a result, breakdown of the blade material caused by lightning strikes into the blade surface cannot be avoided

Method used

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  • Charge enabled lightning protection system for wind rotor blades and wind rotor blades therewith
  • Charge enabled lightning protection system for wind rotor blades and wind rotor blades therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] A wind rotor blade 1 is given. The blade material of this rotor blade is GFRP.

[0021] The rotor blade 1 has a charge-enabled lightning protection system 2 . This lightning protection system 2 comprises a lightning receptor 21 integrated into the rotor blade 1 . The lightning receptor surface 211 of the lightning receptor 21 and the blade surface 101 of the wind turbine blade 1 are flush with each other.

[0022] The lightning receptor 21 is made in one piece and includes metal as the lightning receptor material. The lightning receptor 21 is connected (not shown) to the inner conductor of the blade 1 with the conductive material.

[0023] In an embodiment not shown, the air receptor 21 includes an inner core and an outer ring surrounding the inner core. The outer ring and the inner core include conductive material. The outer ring and the inner core are separated from each other by a partition with an electrically insulating material. The electrically insulating m...

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PUM

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Abstract

The invention provides a lightning protection system (2) for a wind turbine blade (1) via charge initiation (Charge Initiated Lightning Protection, CILP). The lightning protection system comprises at least one electric charge generator (20) for generating electric charge at a lightning receptor (21) of the wind turbine blade (1) such that an electrostatic field is generated at the lightning receptor (21) leading lightning current directly to the lightning receptor (21). Additionally the invention provides a wind turbine blade (1) having at least one such lightning protection system (2). The Charge Initiated Lightning Protection system is an efficient and easy way for protecting a wind turbine blade (1) from the effect of a lightning stroke. Just by rotating the wind turbine blade (1) electric charge can be concentrated at the lightning receptor (21) guiding the lightning current and avoiding the puncture of the blade surface of the wind turbine blade (1) as a result of a lightning stroke.

Description

technical field [0001] The invention relates to a lightning protection system for a wind rotor blade and a wind rotor blade with the lightning protection system. Background technique [0002] The blade material of the rotor blades, such as GFRP (Glass Fiber Reinforced Polymer), can be damaged by lightning strikes, for example consisting of a leading strike and a return strike. Therefore, rotor blades usually have a lightning protection system. [0003] The lightning protection system consists of lightning receptors at the blade surface of the blade. Inside the blade there is a conductor with conductive material connected to the lightning receptor. Via this conductor, the lightning current caused by a direct lightning strike in the air receptor can be shunted. [0004] The area of ​​the lightning receptor is limited, resulting in a relatively small safe contact surface for lightning strikes (very small square centimeters) compared to the entire blade surface (eg 100 square...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D11/00H01T19/00H05F3/04
CPCH02G13/00F03D11/0033Y02E10/721Y02E10/722F03D80/30H02G13/20Y02E10/72
Inventor F.克鲁格B.卢科
Owner SIEMENS AG
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