Abstract:
The development of wind turbines and the capacities of wind power
plants have increased significantly in the last years, more and more wind
farms are being connected into power systems. Integration of large scale wind
farms into power systems presents some challenges that must be addressed,
such as system operation and control, system stability, and power quality.
Wind power plants must provide the power quality required by new
regulations and the reliability of the power system that is interconnected to. It
is very important to analyze and understand the sources of disturbances that
affect the power quality. In this research, the performance of three different
popular wind generators that are connected to the power system have been
analyzed.
Based on this analysis a comparison was made for the three wind
turbines studied that are: the Squirrel-Cage Induction Generator (SCIG),
commonly called the Single-Fed Induction Generator (SFIG), the Doubly-Fed
Induction Generator (DFIG), and the Permanent-Magnet Synchronous
Generator (PMSG). The fixed speed system is more simple and reliable, but
severely limits the energy production of a wind turbine. In case of variable
speed systems, comparisons show that generator of similar rating can
significantly enhance energy capture. Moreover, the performances of these
wind turbines and their characteristics are analyzed in steady-state, and in
addition of that after connected to Sudan national grid. Wind turbines systems
are modeled in MATLAB/SIMULINK, and ETAP environments. Simulation
results matched well with the theoretical turbines operation.
