A Comparative Study of Constant Speed and Variable Speed Wind Energy Conversion Systems

In the early development of the wind energy, the majority of the wind turbines have been operated at constant speed. Subsequently, the number of variable-speed wind turbines installed in wind farms has increased. In this paper, a comparative study of fixed wind speed and variable wind speed system incorporating permanent magnet synchronous generator has been presented. These two systems are modeled and simulated using Matlab. The PMSG has received a lot of important in wind energy applications, due to their possessions of self-excitation, high efficiency and with a variable-speed operation it has become possible continuously to adapt the rotational speed ‘wr' of the wind turbine to the wind speed. The advantage of variable wind speed turbine system is increased the energy captured. The results are presented for the permanent magnet synchronous generator is connected to fixed wind speed and variable wind speed system, The performances of each studied wind generator are evaluated by simulation Work.