The wind tower helps the rotor and the nacelle containing the mechanical gear, the  
electric generator, the yaw mechanism, and the stall control. Figure depicts the  
thing information and format in a big nacelle, and Figure indicates the set up at the  
tower. The peak of the tower withinside the beyond has been withinside the 20 to 50 m range. For medium- 
and big-sized generators, the tower peak is about same to the rotor diameter, as  
visible withinside the measurement drawing of a 600-kW wind turbine (Figure 4.4). Small generators are  
usually established at the tower some rotor diameters excessive. Otherwise, they might suffer  
fatigue because of the terrible wind pace discovered close to the floor surface. Figure 4.five indicates tower  
heights of various-sized wind generators relative to a few recognised structures.  
Both metal and urban towers are to be had and are being used. The production can be  
tubular or lattice. Towers need to be as a minimum 25 to 30 m excessive to keep away from turbulence prompted with the aid of using  
bushes and buildings. Utility-scale towers are commonly two times as excessive to take benefit of  
the quicker winds at the ones heights.  
The essential problem withinside the tower layout is the structural dynamics. The tower vibration and the  
ensuing fatigue cycles below wind pace fluctuation are averted with the aid of using the layout. This  
calls for cautious avoidance of all resonance frequencies of the tower, the rotor, and the  
nacelle from the wind fluctuation frequencies. Sufficient margin need to be maintained  
among the 2 units of frequencies in all vibrating modes.  
The resonance frequencies of the shape are decided with the aid of using whole modal analyses,  
main to the eigenvectors and Eigen values of complicated matrix equations representing  
the movement of the structural elements. The wind fluctuation frequencies are discovered from the  
measurements on the web website online below consideration. Experience on a comparable close by web website online can  
bridge the distance withinside the required information.  
Big cranes are usually required to put in wind towers. Gradually growing tower  
peak, however, is bringing a brand new measurement withinside the set up. Large rotors upload to the  
transportation trouble as well. Tillable towers to nacelle and rotors shifting upwards  
along side the tower are amongst a number of the more recent traits in wind tower  
set up. The offshore set up comes with its personal task that need to be met.