A method for protecting a novel anti-drop submarine cable includes: assembling a traction assembly, a standard bending protection section and a protection reinforcement section sequentially to form a submarine-cable-protection device, and a submarine cable passing through it; connecting a traction rope of the traction assembly to a reserved traction rope pre-buried in a single pile foundation, and enabling the submarine cable and the submarine-cable-protection device by a traction device passing through a reserved hole of the foundation; moving the assembled sets forward until the traction rope is lifted and unmovable, enabling a retaining ring of the protection reinforcement section to abut against the reserved hole, installing the traction rope on the foundation by shackles; pulling the reserved traction rope to a proper length, fixing the submarine cable to installation base. The safety is ensured by avoiding dropping of the submarine-cable-protection device, and ensures the overbending protection of the submarine cable.

A wind turbine includes a tower, a nacelle supported rotatably at a top portion of the tower, a main cable for transporting electrical energy produced in the nacelle to a bottom portion of the tower, and at least one auxiliary cable guided from the nacelle to an intermediate portion between the top and bottom portion and/or to the bottom portion of the tower, wherein the main cable includes a first loop, and the at least one auxiliary cable includes a second loop, and the first and second loops are configured for compensating, independently from each other, a movement of the respective cable due to rotation of the nacelle relative to the tower. Thus, movement of the auxiliary cables caused by yawing of the nacelle will not affect movement of the main cable.

A wind turbine, in particular an offshore wind turbine includes at least one hollow structural element, at least one cable inlet arranged in a bottom region of the hollow structural element. A first platform is arranged inside the hollow structural element, above the bottom region. At least one flow opening is arranged in the shell surface of the hollow structural element and penetrating the shell surface. At least one active control element is flow-connected to the flow opening to affect a media exchange between the interior of the hollow structural element and the exterior of the hollow structural element.

Provided is a method for offshore installing of power cables or tubes for power cables for wind turbine installations, wherein an end of an incoming power cable and an end of an outgoing power cable or an end of an incoming tube and an end of an outgoing tube are pulled into an offshore wind turbine installation simultaneously. By pulling both ends of the incoming and outgoing power cables/tubes into the offshore wind turbine installation simultaneously, the ends of the incoming and outgoing power cables/tubes can be pulled into the offshore wind turbine installation in a single process step.

A power cable arrangement, in particular marine power cable, for offshore wind farms, including at least one cable drum device with a cable drum. The power cable arrangement includes at least one power cable wound on the cable drum with at least one cable end configured to pre-installing at a cable connection of a wind energy device. The power cable is wound on the cable drum such that a first section of the power cable is wound inversely to a further section of the power cable.

A transition piece (140) for a wind turbine tower (110) is provided, that is configured to be installed on a tower foundation (111) and to carry a tower piece (113). It comprises a high voltage joint (10) with grid input and output terminals (11, 12) and WTG connecting input and output terminals (14, 13). The grid input terminal (11) is configured for receiving and connecting to an array cable (21) from a power grid (20). The WTG connecting output terminal (13) is operatively connected to the grid input terminal (11) for receiving and connecting to an input cable (23) leading to a switchgear (30). The WTG connecting input terminal (14) is configured for receiving and connecting to an output cable (24) from the switchgear (30). The grid output terminal (12) is operatively connected to the WTG connecting input terminal (14) for receiving and connecting to an array cable (22) leading to the power grid (20). Further, installation, testing, connecting and maintenance methods taking advantage of the high voltage joint (10) are provided.

A transition piece (140) for a wind turbine tower (110) is provided, that is configured to be installed on a tower foundation (111) and to carry a tower piece (113). It comprises a high voltage joint (10) with grid input and output terminals (11, 12) and WTG connecting input and output terminals (14, 13). The grid input terminal (11) is configured for receiving and connecting to an array cable (21) from a power grid (20). The WTG connecting output terminal (13) is operatively connected to the grid input terminal (11) for receiving and connecting to an input cable (23) leading to a switchgear (30). The WTG connecting input terminal (14) is configured for receiving and connecting to an output cable (24) from the switchgear (30). The grid output terminal (12) is operatively connected to the WTG connecting input terminal (14) for receiving and connecting to an array cable (22) leading to the power grid (20). Further, installation, testing, connecting and maintenance methods taking advantage of the high voltage joint (10) are provided.

A method of securing a cable (22) to a wind turbine blade is described. The method involves providing a pre-assembled cable assembly (34) comprising a cable (22) and a plurality of mounts (40a-e) pre-attached to the cable (22) at intervals along the length of the cable (22). The plurality of mounts (40a-e) is attached to a surface (20) of a wind turbine blade such that the mounts (40a-e) are spaced apart along the surface (20) of the blade. The spacing between adjacent mounts (40a-e) when the mounts (40a-e) are attached to the blade is less than the length of the cable (22) between said adjacent mounts (40a-e) such that a predetermined amount of slack is provided in the cable (22) between said adjacent mounts (40a-e). A pre-assembled cable assembly for use in the method is also described together with a method of assembling the cable assembly.

A cable twisting protection device, a method of use of the cable twisting protection device and a wind turbine are provided according to the present application. The cable twisting protection device includes: a cable clamping block, including a first clamping block and a second clamping block, wherein the first clamping block and the second clamping block are connected to form a tubular structure having a through hole at a middle and the through hole is configured to clamp a cable; and a cable partition plate, formed by splicing two or more separation plates, wherein grooves are provided in butting faces of each of the separation plates. The cable clamping blocks are fixedly connected to the cable partition plate, and the tubular structures of the cable clamping blocks are vertically aligned with the separation holes of the cable partition plate respectively.

Provided is a wind turbine, including a hollow tower carrying a nacelle, and at least one power electronics component emitting electromagnetic waves during operation, in particular an inverter located at the bottom of the tower, wherein the tower acts as a wave guide for an electromagnetic wave generated by the power electronics component, wherein the tower comprises at least one absorber element at least reducing the transport of the electromagnetic wave of the power electronics component along the tower.