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Dynamic Behavior of the Doubly Fed Induction Generator During Three-Phase Voltage Dips

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4 Author(s)
Lopez, J. ; Univ. Publica de Navarra, Pamplona ; Sanchis, P. ; Roboam, X. ; Marroyo, L.

The use of doubly fed induction generators (DFIGs) in large wind turbines has become quite common over the last few years. These machines provide variable speed and are driven with a power converter which is sized for a small percentage of the turbine-rated power. A drawback of the DFIG is that it is very sensitive to grid disturbances, especially to voltage dips. However, the operation of the machine in these situations has only been studied in the literature by means of simulations. This paper develops a theoretical analysis of the dynamic behavior of the induction machine during three-phase voltage dips. The proposed analysis contributes to understanding the causes of the problem and represents a very useful tool to improve the existing solutions and propose new alternatives. Experimental results are in good agreement with those obtained theoretically and validate the proposed analysis.

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Energy Conversion, IEEE Transactions on  (Volume:22 ,  Issue: 3 )