In this chapter, a brief general introduction focuses on the well-known topologies of wind energy conversion systems (WECS), on proposed controls and generators by the scientific researchers. One part will be devoted to the latest research that has addressed the performance problems of wind systems and their results (in simulation). There will be also some arguments that reflect the main proposed ideas in this eBook, the proposed selections and their applications in simulation. We present the selecting criteria in particular the type of: generator, controls and theirs application in simulation studies. Also, we discuss in a detailed section on the different contributions of eBook that define the improvement of the proposed algorithms in each chapter. Furthermore, the organization and structure of eBook will be as follow; chapter one is devoted on the state of the art of wind systems and their controls, in particular using the doubly fed induction machine (DFIM). The simulation part is provided in two chapters (3 and 4). The limitations and problems encountered during the realization of this eBook are well described in the following section. After solving problems, very satisfactory simulation results have been found which reflect the quality of the scientific contribution including more papers of conferences; Journal papers were published during this eBook.
Keywords: Doubly Fed Induction Generator (DFIG), Power Electronics (PEs), Wind Energy Conversion Systems (WECS’s), Wind Turbines (WTs).Doubly Fed Induction Generator (DFIG), Power Electronics (PEs), Wind Energy Conversion Systems (WECS’s), Wind Turbines (WTs).