US 11,982,259 B2
Wind turbine blade with lightning protection system
Lars Bo Hansen, Kolding (DK)
Assigned to LM WIND POWER A/S, Kolding (DK)
Appl. No. 17/295,261
Filed by LM Wind Power A/S, Kolding (DK)
PCT Filed Nov. 20, 2019, PCT No. PCT/EP2019/081919
§ 371(c)(1), (2) Date May 19, 2021,
PCT Pub. No. WO2020/104522, PCT Pub. Date May 28, 2020.
Claims priority of application No. PA 2018 70767 (DK), filed on Nov. 20, 2018.
Prior Publication US 2022/0010783 A1, Jan. 13, 2022
Int. Cl. F03D 80/30 (2016.01)
CPC F03D 80/30 (2016.05) [F05B 2240/30 (2013.01); F05B 2280/2006 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A wind turbine blade comprising a shell body made of a composite material and having a root end and a tip end, an outer surface, a pressure side and a suction side, a trailing edge and a leading edge, and additionally a lightning protection system, the lightning protection system comprising:
at least one lightning receptor provided with an outer surface arranged freely accessible in, on or at the outer surface of the wind turbine blade at the tip end of the wind turbine blade; and
a lightning conductor made of electrically conductive material extending within the shell body along the entire longitudinal direction of the wind turbine blade,
wherein the at least one lightning receptor and the lightning conductor are electrically connected by means of a connection area,
wherein at least a part of the outer surface, optionally the whole of the outer surface of the at least one lightning receptor, is freely accessible and is formed of carbon, and
wherein the lightning conductor is provided with conductive threads and/or wires extending outwardly from the outer surface of the at least one lightning receptor and being anchored in a cavity of the at least one lightning receptor by means of a conductive material or cement, and the outwardly extending threads and/or wires are connected to the lightning conductor in the connection area.