Abstract: A tower structure for a wind power plant permits very high hub heights in a cooperation of internal prestress, guying, and a torsionally rigid tower shaft. The tower structure has a tower shaft, a foundation and a transition piece in a he region of an upper end of the tower shaft. Guy elements are inclined towards a longitudinal axis of the tower shaft, and extend radially outside an outer skin of the tower shaft. Tension members are radially inside the outer skin to prestress the tower shaft vertically at least in sections. The tower shaft is made of prestressed concrete in a region between the transition piece and the foundation. To control resonance behavior, prestressing and guy elements are acted upon with a variable tensile stress which varies and influences natural frequencies of the tower structure such that no interferences occur between excitation frequencies and the natural frequencies, and such that an aerodynamic absorption is also possible.

Abstract: A method of erecting, and a method of servicing or dismantling, a wind energy plant with a hub height of at least 140 meters makes provision that a heavy-duty lifting device is temporarily disposed on a tower top for any installing, exchanging, or disassembling purposes, and subsequently is dismantled immediately, with all these operations being carried out without using an external crane. A light-duty lifting device attached to the tower serves for erecting the tower, so that no external large-scale cranes are required. For disassembling or exchanging the large components, an auxiliary lifting device is able to transport the heavy-duty lifting device to the top of the tower and is also capable of lowering the heavy-duty lifting device from there.