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Transient Behavior of a Class of Wind Turbine Generators During Electrical Disturbances

Common to many present-day designs of large wind turbines is the soft shaft in the low speed part of the drive train. The untwisting of this shaft during an electrical disturbance determines the short-term transient behavior of this type of wind energy system. This feature of the mechanical system and its influence upon transient stability and thus the performance of the wind turbine generator are investigated.