Abstract: There are many negative impacts of the grid faults in Doubly Fed Induction Generators (DFIG) based wind turbines such as stator and rotor over currents, DC-link over voltage, electromagnetic torque oscillations, active and reactive power fluctuations at the grid connection point. Negative impacts of the grid faults have potentially led to destabilization of the power system network. Eliminating the negative impacts enhances the DFIG based wind turbines performance. This paper proposes a comprehensive study about the performance analysis and protection of a 1.5MW DFIG-based wind turbine in order to keep the wind turbine connected to the grid under the symmetrical and asymmetrical grid faults. This study discusses and compares the simulations of two improved protection schemes to eliminate the negative impacts of the grid faults. The investigated protection schemes are simple in construction and cost efficient. The performance of the DFIG is highly improved during the grid faults. The simulation results confirm the effectiveness of these schemes.