An equipotential bonding system can be provided for a lightning protection system that includes a mast assembly with an internal passageway that includes an internal surface, and a conductor that extends through the internal passageway. The equipotential bonding system can include a deflection member that is disposed at least partly within the internal passageway. The deflection member can be configured to urge the conductor into contact with the internal surface to form a conductive pathway between the mast assembly and the conductor.

Embodiments herein describe a discharge filter, located in a root of a wind turbine blade, which includes one or more cables wound into large scale inductors using an internal or external surface of the root as a mandrel. These cables provide power inputs to an electrical panel for one or more a powered systems that are located in a body of the wind turbine blade. The electrical panel is connected to a lightning protection system that selectively provides a path to ground, and the inductors form a high-impedance barrier that shunts power away from the cables and onto the lightning protection system in the event of a lightning strike or other electrical discharge traveling from the powered systems to the electrical panel.

A method for conditioning to reduce lightning strike effects is provided herein. The method includes positioning a plurality of tabs on a component. The plurality of tabs are electrically conductive. The component includes at least one of a composite material and a metal material having at least one joint. The method includes positioning the component on a support that is electrically insulated, and connecting a plurality of wires between an initial set of the plurality of tabs and a pulse generator. The pulse generator is configured to generate a plurality of current pulses through the plurality of wires. The plurality of current pulses imitate a plurality of lightning strikes. The method further includes striking the component with the plurality of current pulses from the pulse generator, and reconnecting the plurality of wires to one or more different sets of the plurality of tabs between the plurality of current pulses.

A wind turbine includes a hub connected to a rotatable shaft extending in an axial direction and at least one bearing supporting the shaft against a housing, wherein the housing includes an electrically conductive cage section, which surrounds at least partially an axial segment of the shaft, wherein the cage section is connected to the shaft by at least one first conduction means and at least one second conduction means, wherein the at least one first conduction means and the at least one second conduction means are arranged spaced both from each other in the axial direction, wherein the at least one bearing is arranged between the segment of the shaft and the cage section of the housing at an axial position in between the at least one first conduction means and the at least one second con-duction means.

The invention relates to a connection head piece for contacting an insulated down conductor in the external lightning protection, comprising a sleeve having an axially extending first inner diameter section adjusted to the outer diameter or cross-section of the insulated down conductor for receiving one end of the insulated down conductor, and having a second inner diameter section extending axially adjacent thereto and adjusted to the outer diameter or cross-section of a stripped, exposed conductor end of the insulated down conductor, and means for fastening the stripped, exposed conductor end in the second inner diameter section. According to the invention, a static friction-generating means is formed in the first inner diameter section of the sleeve and flexibly projects into the interior of the sleeve such that a nonpositive connection is established between an outer sheath of the insulated down conductor and the sleeve upon insertion of the down conductor.

A wind turbine blade comprising a lightning protection system, which is at least partly disposed in an inboard portion of the blade. The lightning protection system comprises a plurality of inboard down conductor cables and a diverging electrical junction. The lightning protection system may comprise a down conductor cable having root and tip portions having insulation with different electrical breakdown voltages and/or a down conductor cable portion and a supporting component to hold the cable portion in free space in a position near or on a camber line of the blade aerofoil section, so that the cable portion is spaced apart from at least one electrically conductive structural component.

A wind turbine blade comprising a lightning protection system, which is at least partly disposed in an inboard portion of the blade. The lightning protection system comprises a down conductor cable portion and a supporting component to hold the cable portion in free space in a position near or on a camber line of the blade aerofoil section, so that the cable portion is spaced apart from at least one electrically conductive structural component. The lightning protection system may comprise a plurality of inboard down conductor cables and a diverging electrical junction; and/or a down conductor cable having root and tip portions having insulation with different electrical breakdown voltages.

A wind turbine blade comprising a lightning protection system, which is at least partly disposed in an inboard portion of the blade. The lightning protection system comprises a down conductor cable having root and tip portions having insulation with different electrical breakdown voltages. The lightning protection system may comprise a down conductor cable portion and a supporting component to hold the cable portion in free space in a position near or on a camber line of the blade aerofoil section, so that the cable portion is spaced apart from at least one electrically conductive structural component; and/or a plurality of inboard down conductor cables and a diverging electrical junction.

Provided is an electric charge dissipation system for a wind turbine blade in compliance with lightning protection system and/or with the capacity of mitigating dirt problems in wind turbine generator blades. Also provided is the wind turbine blade including the electric charge dissipation system. Further provided is a method for dissipating electric charges in a wind turbine blade.

Provided is a thunderbolt arrest-type lightning protection device that has a protected area formed to match a structure and a shape of a protected body being protected from thunderbolts, and is capable of effectively protecting the entire protected body from thunderbolts. The device is configured by: a charged body 2 formed of a conductive material provided to cover a protected body B installed on a ground G; an electrical insulation layer 3 that holds the charged body 2 in an electrically-insulated state with respect to the ground G and the protected body B; a capacitor 4 installed on the ground G, and stores an electrical charge by an electrostatic capacity with the ground; and a conductor 5 that electrically connects the charged body 2 and a second electrode body 4b.