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Charge initiated lightning protection system for a wind turbine blade and wind turbine blade with the charge initiated lighting protection system

Inactive Publication Date: 2011-12-01
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]The charge generator has the function of localization and concentration of electric charge at the lightning receptor. By that a receptor surface charge of the lightning receptor is changed. This leads to an electrostatic field which gives a preferential path for the current of a lightning stroke via the lightning receptor and via the connectors inside the blade. As a result the probability of a damage of the blade surface of the wind turbine blade is reduced.
[0019]The Charge Initiated Lightning Protection system is an efficient and easy way for protecting a wind turbine blade from the effect of a lightning stroke.

Problems solved by technology

As a consequence a puncture of the blade material caused by a lightning stroke into the blade surface cannot be avoided.

Method used

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  • Charge initiated lightning protection system for a wind turbine blade and wind turbine blade with the charge initiated lighting protection system
  • Charge initiated lightning protection system for a wind turbine blade and wind turbine blade with the charge initiated lighting protection system

Examples

Experimental program
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Effect test

Embodiment Construction

[0023]Given is a wind turbine blade 1. The blade material of the wind, turbine blade is GFRP.

[0024]The wind turbine blade 1 has a charge initiated lightning protection system 2. This lightning protection system 2 comprises a lighting receptor 21 which is integrated into the wind turbine blade 1. A receptor surface 211 of the lightning receptor 21 and a blade surface 101 of the wind turbine blade 1 are flushed with each other.

[0025]The lightning receptor 21 is made out of one piece and comprises a metal as receptor material. The lightning receptor 21 is connected to (not shown) inner conductors with conductive material of the blade 1.

[0026]In a not shown embodiment the receptor 21 comprises one inner core and one outer ring surrounding the inner core. The ring and the core comprise electrically conductive material. The ring and the core are separated from each other by an interlayer with electrically insulating material. This electrically insulating material is GFRP.

[0027]The lightin...

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PUM

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Abstract

A lightning protection system is provided for a wind turbine blade via charge initiation (Charge Initiated Lightning Protection). The lightning protection system includes at least one electric charge generator for generating electric charge at a lightning receptor of the wind turbine blade such that an electrostatic field is generated at the lightning receptor leading lightning current directly to the lightning receptor. Additionally a wind turbine blade having at least one such lightning protection system is provided.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates to a lightning protection system for a wind turbine blade and a wind turbine blade with the lighting protection system.[0003]2. Description of the Related Art[0004]A blade material of a wind turbine blade, e.g. GFRP (Glass Fiber Reinforced Polymer), can be destroyed by a lightning stroke (e.g. composed by a leader and a return stroke). Therefore a wind turbine blade usually has a lightning protection system.[0005]The lightning protection system consists of lightning receptors at a blade surface of the blade. Inside the blade there are conductors with electrically conducting material connected to the receptors. Via the conductors lightning current which is caused by a direct lightning stroke into the receptors can be diverted.[0006]An area of the receptors is limited leading to a relatively small safe contact surface for the lightning stroke (few square centimeters) compared to the whole blade surf...

Claims

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Application Information

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IPC IPC(8): F01D25/00
CPCF03D11/0033H02G13/00H02G13/20Y02E10/722Y02E10/721F03D80/30Y02E10/72
Inventor KRUG, FLORIANLEWKE, BASTIAN
Owner SIEMENS AG
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