Abstract: The Tunisian power transmission grid will accommodate a wind power pool composed of five wind farms dispersedly placed on the national territory and based on variable speed induction generators. This study investigated the impact of this wind energy penetration on voltage regulation and the grid dynamic performance. The study was based on bifurcation diagrams taking the wind generation as a bifurcation parameter and on time response simulations to grid disturbances. We have considered network faults such as wind farm disconnection events, three-phase short-circuits at a conventional bus and voltage dip faults applied at wind connection buses. The additional wind power generation has significantly improved voltage regulation, although over voltages have been observed. Grid dynamic performance has shown compliance to voltage ride through capabilities and may be enhanced by additional reactive supply.