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Control of a doubly fed induction generator in a wind turbine during grid fault ride-through

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4 Author(s)
Dawei Xiang ; Dept. of Electr. Eng., Chongqing Univ. ; Ran, L. ; Tavner, P.J. ; Yang, S.

This paper analyzes the ability of a doubly fed induction generator (DFIG) in a wind turbine to ride through a grid fault and the limitations to its performance. The fundamental difficulty for the DFIG in ride-through is the electromotive force (EMF) induced in the machine rotor during the fault, which depends on the dc and negative sequence components in the stator-flux linkage and the rotor speed. The investigation develops a control method to increase the probability of successful grid fault ride-through, given the current and voltage capabilities of the rotor-side converter. A time-domain computer simulation model is developed and laboratory experiments are conducted to verify the model and a control method is proposed. Case studies are then performed on a representatively sized system to define the feasibility regions of successful ride-through for different types of grid faults

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Energy Conversion, IEEE Transactions on  (Volume:21 ,  Issue: 3 )