Doubly fed induction generators are one of the most important types used in wind turbines because they are easy to deal with changing wind speeds. These generator are driven by electronic converters where is installed between the stator of generator that connected to the electrical grid and the rotor, several converters ,such as traditional converter and matrix converter, have been used to drive this type of generators. The use of these converters is associated with several problems related to the appearance of distortions in voltage and current and oscillations in electromagnetic torque, in order to reduce these distortions and oscillations and to obtain pure voltage and current waves as much as possible to supply the electrical grid with electrical energy of high quality and efficiency, the multi- level converter which represent the latest used converters because of their unique properties and features as an alternative option to the traditional and matrix converters that have been used.
In these research, the performance of the doubly fed induction generator was studied and analyzed when it is driven by a multi-level converter in both cases of sub-synchronous and super synchronous speed, where the wind generation system based on the use of the multi-level converter was modeled using MATLAB, the simulation was carried out, and analyze the total harmonic distortion for waves of voltage and current and the results were discussed for speed, stator and rotor currents, voltages of stator and rotor and show the active generated power curve and reactive power curve ,in addition to showing the electromagnetic torque curve and then compare with the cases in which it was used matrix converter and traditional converter where the results of the comparison showed that use of the multi-level converter led to a significant improvement in the performance of the system.