This paper presents the study of a structure composed of a wind turbine, a speed multiplier and an asynchronous generator coupled to the infinite power network through a line of energy transfer electric modelled by an R-L circuit. After modelling of the global system, the behaviour of the proposed structure in steady states and in transient regimes is studied. The problem of the electric energy transfer to the network was studied. On the other hand, if the wind speed changes too much variation, this will cause a violent variation of power and result in step out operation of the generator from the power system. This paper proposes a control strategy to reduce the power variations by introducing feed forward control combined with conventional feedback control. (C) 2003 Elsevier Ltd. All rights reserved.