Stability of the synchronous generators within wind energy power systems

The last decade´s research has highlighted the necessity of using of wind aggregates´ at full capacity, fact that involves the functioning at a imposed precise value of rotation and torque at certain wind speed values (on the maximum power point located on the wind turbine characteristic). The autonomous power energy system composed from a synchronous generator (SG), wind turbine and the load is dynamically and statically stable regardless of the considered load and inertia moment, meanwhile the wind aggregate´s based on synchronous generator (SG) connected to the power grid presents a dynamic stability significantly influenced by the values of initial load angle, of the load variation and by the inertia moment (turbine - gear box - generator). The main objectives of the paper´s research are the stability´s analysis of the synchronous generator coupled with a wind turbine.