The disclosure relates to a device for a cable guide of cables between a rotor hub and a rotor blade, which is rotatable about its longitudinal axis, of a wind turbine. A device is provided which, with simple means, ensures a reliable and gentle guidance of cables from the rotor hub into the rotor blade of a wind turbine, wherein pitching of the rotor blade should not be hindered and reliable energy supply of the electrical components in or on the rotor blade should be ensured. The rotor hub includes a bracket and the rotor blade includes a blade base. The cable guide is arranged centered in the middle between the bracket and the blade base and includes a cable ladder.

The present invention relates to a wind turbine tower comprising a tower vibration damper (100) with a tuned mass damper and one or more impact damping units (113, 114, 115, 200, 300, 400). The tuned mass damper comprises a pendulum structure (101, 208), a chamber connecting a friction media (112) to the pendulum structure (101, 208) is at least partly immersed, and a suspension arrangement (103-111) suspending the pendulum structure (101, 208) inside the wind turbine tower such that the pendulum structure (101) is allowed to displace from a neutral position towards the outer boundary (102) of the chamber. The impact damping units (113, 114, 115, 200, 300, 400) are positioned between the pendulum structure (101, 208) and the outer boundary (102), such that the outer boundary (102) of the chamber and the pendulum structure (101, 208) may collide via the impact damping units (113, 114, 115, 200, 300, 400).

The exemplary embodiments herein provide a tether for use with an airborne device, where the tether contains an elongate member having a first end for attaching to a ground attachment point and an opposing second end for attaching to the airborne device where the elongate member has a cross-sectional area which varies across the member. In some embodiments, the tether contains one or more electrically conductive elements, an optional strength element, insulation separating any adjacent electrically conductive elements, and a jacket which surrounds and protects each of the tether components.

Provided is a wind turbine, including a tower with a plurality of tower sections, a plurality of stay cables for guying the tower, and a plurality of support devices for anchoring the stay cables in at least one of the tower sections, wherein the support devices are arranged completely inside an internal space of the at least one tower section. Because the support devices are arranged inside the internal space of the tower section, transport of the tower section is easier because no parts of the support devices protrude from the internal space.

A water-driven turbine has an elongated endless conveyor with down and up streaming straightaways connected by travel-reversing turns. Paddles mounted on the conveyor present high resistance to waterflow on the downstream straightaway and low resistance to waterflow or the atmosphere on the upstream straightaway, the differential allowing the flow of water to continuously drive the conveyor which is connected to a power take-off shaft facilitating connection to a variety of energy-harnessing systems. The turbine can be towed, self-driven or mooring line manipulated to a flow site and is operable in unidirectional flows such as rivers and reversing flows such as tides at depths from surface to bottom. The paddles can be mounted or changed on shore, at the flow site and anywhere in between. The turbine is efficient in low and high velocity water flow, not easily damaged by floating debris, cavitation free and fish, mammal and environmentally friendly.

In a system of the disclosure, power generation devices installed at separate places include a kite-shaped flying object staying in the air, a generator installed on a ground and a tether operatively connecting the two to each other. The tether, which is pulled when the kite-shaped flying object rises, rotates a rotor of a generator to generate power. A power supply controller controls power supply such that, when power suppliable from a power generation device meets a target power needed by a power receiving facility, power is supplied from the power generation device to the power receiving facility, and when the target power of the power receiving facility exceeds the power suppliable from the power generation device, power from another power generation device is supplied to the power receiving facility.

An energy generating system for generating electrical energy from flow of a fluid includes an energy generating assembly having an outer shell defining an interior space and a center axis, a fixed generator coil stator extending in the interior space along the center axis, and a rotor encircling the stator and having magnets. The rotor is coupled to the outer shell, and the outer shell is configured to be rotated by the flow of the fluid such that the rotor rotates relative to the stator and thereby generates electrical energy. The system can include extending systems for positioning the assembly nearer or farther from shore in desired fluid flows.

The present invention provides an underwater installation-type water-flow power generation system constituted such that, even if a plurality of underwater installation-type water-flow power generation units is to be installed in a deep water area, a collision between each of the plurality of underwater installation-type water-flow power generation units can be prevented, and each of the underwater installation-type water-flow power generation units can be installed under the sea simply, rapidly, and safely in the same state as the installation under the shallow sea a large power generation output can be obtained efficiently and stably by using an ocean current or a water flow which is natural energy.

A submersible device is provided herein. The submersible device may include a submersible hull, control fins, propeller fins, and a turbine device. The submersible hull may include a proximal end, an opposing distal end, a first sidewall and a second sidewall opposite the first sidewall. The sidewalls may be in between the proximal and distal ends of the hull. The control fins may extend from the submersible hull. At least one control fin extends from the first sidewall and at least one other control fin extends from the second sidewall. The propeller fins may extend from the submersible hull at the distal end. Each of the propeller fins may be connected to a rotor. The turbine device may be communicatively coupled to the rotor.

A dismountable wind power plant with rotation axis substantially perpendicular to the wind direction is disclosed. The sail structure may form a Savonius type turbine when the power plant is in tensioned state, having two semicylindrical sails (5) facing opposite directions. Sails (5) are tensioned between transverse bars (6, 7), wherein the transverse bars (6, 7) provide the shape to the sails (5). The wind power plant is tensioned with a cable (8) between two fixed support points (3, 4). In one example the bottom portion of the power plant is connected to lower fixed support point (4) and the cable (8) to upper fixed support point (3). The cable (8) is tightened, causing the soft sail (5) to stiffen into its functional form. A generator (2) receives the rotational energy from the turbine (5, and provides electric power to power outlet. The application also concerns a method for mounting the wind power plant.