Wind Turbine Blades and Potential Equalization Systems
The present disclosure relates to a wind turbine blade comprising a load carrying structure, a shell body and a lightning protection system. The wind turbine blade extends in a longitudinal direction between a root end and a tip end. The load carrying structure is made of a fibre-reinforced polymer material and comprises a plurality of stacked fibre layers. The stacked fibre layers comprise electrically conductive fibres, such as carbon fibres. The lightning protection system comprises a lightning receptor arranged freely accessible in or on the shell body. The lightning protection system comprises a lightning down-conductor, which is electrically connected to the lightning receptor and is further configured to be electrically connected to a ground connection. The wind turbine blade further comprises a potential equalisation system, which provides a potential equalising connection between a number of the electrically conductive fibres of the load carrying structure and the lightning protection system. The potential equalisation system comprises a dissipating element made of an electrically conductive material. The dissipating element comprises at least one transverse connector that is arranged so as to extend transverse through a thickness of the stacked fibre layers and configured to dissipate.
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Published patent application
Disclosure date: 12-23-2015
Publication date: 06-28-2017
Applicant: LM WP PATENT HOLDING AS, DK
Inventor: JESPERSEN KLAVS, DK ; NIELSEN LARS, DK
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