An apparatus for connecting a lattice tower to the nacelle of a wind turbine. The apparatus has high flexural rigidity and enables direct transition between the nacelle and members of the lattice tower. The apparatus includes two rings joined together with vertical plates extending between them. Upper and lower faces of the apparatus are formed by upper and lower horizontal plates. Central ribs are coupled together and with the vertical plates through a plurality of attachment pieces. The central ribs in part form a large central polygonal hole for accommodating an electrical generator.

The application relates to wind turbine tower section production methods and in particular to methods of manufacturing a plurality of elongate tower segments for forming a wind turbine tower section, the tower section constructed from a plurality of elongate tower segments connected along their respective longitudinal edges. The tower section is formed from a plurality of cans connected end to end and is divided into elongate segments by cutting along two or more cut lines extending along the length of the tower. A method of providing a horizontal flange at the end of a wind turbine tower is also discussed, as is a vertical flange preassembly including a pair of vertical flanges for connecting the longitudinal edges of adjacent first and second tower segments.

The present invention relates to a wind turbine assembly system which proposes an alternative to conventional cranes, having a main lifting structure configured to withstand the load of at least one tower section or at least one wind turbine component, and at least one secondary lifting structure configured to perform the lifting of the main lifting structure with respect to the wind turbine tower, in addition relating to a wind turbine assembly method according to the previous system, as well as the wind turbine assembled with the previous method.

The disclosure describes, in part, battered composite piles arranged in-line with angled legs of a tower (e.g., lattice tower). The number of battered composite piles may be equal to the number of angled tower legs of the tower, and each of the battered composite piles may attach to a respective angled tower leg and may have batter angles at angles that match an angle of the angled legs of the tower. These battered composite piles are loaded predominantly axially rather than in shear and, thus, the piles may be designed to be much smaller in size while still meeting safety requirements. In addition, the piles may be installed in less time and at a lower cost than compression/lift and shear loaded foundations.

The disclosure describes, in part, battered composite piles arranged in-line with angled legs of a tower (e.g., lattice tower). The number of battered composite piles may be equal to the number of angled tower legs of the tower, and each of the battered composite piles may attach to a respective angled tower leg and may have batter angles at angles that match an angle of the angled legs of the tower. These battered composite piles are loaded predominantly axially rather than in shear and, thus, the piles may be designed to be much smaller in size while still meeting safety requirements. In addition, the piles may be installed in less time and at a lower cost than compression/lift and shear loaded foundations.

The present invention relates to a method for assembling concrete towers with a decreasing sector for wind turbines which comprises a phase of pre-assembly of concrete tower sections which allows to reduce the space required during the stage of pre-assembly of the different tower section prior to lifting and the civil work associated to set said space up wherein, during the pre-assembly phase, a first annular section is confined at least partially within the inner space defined by a second annular section, the invention also relating to the wind turbine associated to said method of assembly.

A variable level, relatively mobile wind power system consists of turbines mounted upon an axis. As needed, the axis may be brought to the desired level upon a column and retracted to the ground for servicing. The entire wind power system can also be easily transferred to a different location.

Systems for assembling a wind turbine without the assistance of cranes. According to some implementations a system is provided that includes lifting systems having lifting platforms arranged peripherally around the tower. The lifting platforms cooperate with different connection tools that can be supported on an auxiliary column and thus lift or lower the tower modules.

An apparatus for helicopter erection of an emergency restoration structure, and a method of helicopter erection of an emergency restoration structure using the same are provided. An apparatus for helicopter erection of an emergency restoration structure includes a first alignment frame portion attachable to a first section of an emergency restoration structure; a second alignment frame portion attachable to a second section of the emergency restoration structure; an alignment portion arranged on at least one of the first alignment frame portion and the second alignment frame portion; and a hook configured to receive a portion of at least one of the first alignment frame portion and the second alignment frame portion.

A modular protective system (MPS) Expedient Guard Tower and Fighting Position meeting multiple criteria for deployment and re-deployment in austere combat environments is disclosed as well as methods of assembly. The MPS Expedient Guard Tower and Fighting Position is lightweight such that it can be easily deployed by helicopter, requires no tools or equipment to assemble, and can be assembled very quickly by a team of four to six soldiers. The Modular Protective System (MPS) Expedient Guard Tower and Fighting Position can be easily recovered, i.e., disassembled and redeployed to a different location and as the title of the invention suggests, it is capable of being constructed in a non-elevated position or an elevated position. Accordingly, it may be used either as a guard tower, a fighting position, or an inspection station, etc., depending upon the particular need.