The present disclosure provides a system for lifting and mounting components of a wind turbine assembly to the top of a wind turbine tower without the requirement of a large crane to reach the top of the tower. The system comprising: an adjustable frame defining an interior space sized to receive the tower, wherein the adjustable frame comprises one or more actuators configured to reduce or expand the interior space defined by the adjustable frame; a first boom attached to the adjustable frame, the first boom rotatable with a first boom actuator; and a second boom attached to the adjustable frame, the second boom rotatable with a second boom actuator, and wherein the first boom and the second boom are joined by a telescoping crossmember.

A portable power generation system having a transportable structure can include a wind turbine having a tower mounted to the transportable structure configured to allow erection from within the transportable structure. It can also include a solar panel array pivotally connected to the structure that is expandable to an in use configuration in which the expanded solar panel is inclined to a side of the transportable structure.

An antenna system, a communication device, and a communication system. The antenna system includes an antenna apparatus. The antenna apparatus includes a radiating element array and a reflection plate. The radiating element array is disposed on a first side of the reflection plate. The reflection plate further has a second side opposite to the first side. The reflection plate includes a plurality of reflection plate through holes. Space on the two sides of the reflection plate is connected through the plurality of reflection plate through holes. The antenna system further includes a blade. The blade is located on one side of the antenna apparatus, and is disposed opposite to the plurality of reflection plate through holes. The solutions provided help reduce impact of wind load on the antenna system, and improve performance of the antenna system.

A method for installing or mounting a tower is formed by the stacking of two or more mounting groups on a base section. At least one of said mounting groups is formed by a plurality of stacked segments. Said method includes arranging the base section in the definitive position thereof on the ground and lifting and placing the mounting groups of the tower on the base section by means of a mounting crane that can adopt different jib configurations. Advantageously, in said method, at least two or more stacked segments are installed consecutively in the corresponding mounting group with one and the same crane jib configuration. The length of the lowest stacked segment of said mounting group is smaller than the length of at least another stacked segment of the aforementioned mounting group.

A damping device configured to be mountable on an upper opening of a tower and configured to provide vibration damping during vertical storage and/or vertical transport of the tower is provided. The damping device includes a liquid damper comprising a single liquid tank, a mounting interface configured to mount the liquid damper on the upper opening of the tower. The mounting interface includes one or more load transfer elements configured to transfer vibrations between the tower and the liquid damper. The liquid damper is configured to provide the vibration damping at predetermined frequencies tunable by one or more damping parameters of the liquid damper. The one or more damping parameters are configured such that the liquid damper damps vibrations at least at a first frequency and at a second frequency, the second frequency being different from the first frequency.

A superconducting machine includes a main shaft, an armature with at least one armature winding arranged with respect to the main shaft, a carrier structure arranged circumferentially around the main shaft and defining a circumferential exterior surface, and a plurality of superconducting coils secured to the circumferential exterior surface. Each of the plurality of superconducting coils has a first common polarity. The superconducting machine further includes a void space between each of the plurality of superconducting coils. Further, each void space has a second common polarity which is in opposition of the first common polarities of the superconducting coils.

A method for installing at least one damper unit in a tower section of a wind turbine tower is disclosed. The tower section is arranged with its centre axis in a substantially horizontal orientation, and a guiderail is introduced into the tower section. A trolley is mounted on a part of the guiderail extending out of the tower section, the damper unit is mounted on the trolley, and the trolley with the damper unit is moved along the guiderail to a position inside the tower section. The damper unit is positioned in an installation position being vertically offset from the centre axis of the tower section, wherein the positioning comprises elevating the damper unit, and the damper unit is attached to the tower section at the installation position.

The present invention relates to a post-tensioning system for a tower of a wind turbine that manages the quasi-permanent loads on the tower to counter them, reducing their impact and making it possible to decrease the required amount of overall post-tension force in the tower of the wind turbine, also to a post-tensioned tower of a wind turbine comprising the post-tensioning system and to the method of post-tensioning a tower of a wind turbine.

A leak containment arrangement for a fluid damper in a wind turbine tower includes a receptacle arranged below the fluid damper; a fluid guide arranged between the fluid damper and the receptacle, which fluid guide is arranged to receive fluid from a leak in the damper and to guide the leaked fluid into the receptacle; and a sensing means arranged to detect fluid in the receptacle. Further provided is a method of providing leak containment for a fluid damper in a wind turbine tower.

A liquid damper for a wind turbine tower includes a damper housing formed from a horizontal lower annulus, a horizontal upper annulus, an essentially cylindrical outer vertical wall and an essentially cylindrical inner vertical wall, wherein the outer diameter of the damper corresponds to the interior diameter of the tower; an operational volume of liquid contained in the damper; and an arrangement of vertical ribs mounted to a vertical wall of the damper. Further provided is a method of assembling a wind turbine.