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AssigneeGamesa Innovation & Technology, S.L.
InventorsJose Llorente Gonzalez, Sergio Velez Oria
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Lightning protection system of wind turbine blades formed by various connections arranged on carbon fibre laminates (2) of the blade (1), equipotentialising the surface of the airfoils (4) of the beam (10) via derivations from a main cable (6) using the respective auxiliary cables (5). The auxiliary cables are connected to metal plates (3) which make the direct connection with the carbon fibre laminates (2) and are positioned during the blade (1) laminating and curing process, or they are connected to metal pins, preferably cone shaped, which pass through the hybrid laminate. Around the connections a nanocomposite based conductive resin (11) is arranged. In the case of a hybrid laminate with layers of carbon fibre and layers of fibre glass, the equipotential state of the different layers is achieved using windows, discontinuities or open spaces in the fibreglass layers.
Lightning protection system on wind turbine blades with carbon fibre laminates which incorporates a main cable (6) characterised in that the mentioned main cable (6) is equipotential with the carbon fibre laminates (2) at two locations of the blade (1), one at the tip (11) and the other at the blade root, using derivations from the main cable (6) via auxiliary cables (5) connected using a joint screwed to a metal plate (3) connected in turn to the carbon fibre laminate (2).
Lightning protection system on a wind turbine with carbon fibre laminates, according to claim one, characterised in that the metal connection to the auxiliary cable (5) is comprises a metal pin, preferably cone shaped, which establishes the electrical contact with the laminate.
Lightning protection system on wind turbine blades with carbon fibre laminates, according to the fifth claim, characterised in that the conductive resin is formed by adding carbon nanofibres or nanotubes to a resin which is not initially conductive, preferably epoxy resin.
Dependencies are inferred from the claim text.