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Fault Ride-Through of a DFIG Wind Turbine Using a Dynamic Voltage Restorer During Symmetrical and Asymmetrical Grid Faults

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3 Author(s)
Christian Wessels ; Institute for Power Electronics and Electrical Drives, Christian-Albrechts-University of Kiel, Kaiserstr. 2, Germany ; Fabian Gebhardt ; Friedrich Wilhelm Fuchs

The application of a dynamic voltage restorer (DVR) connected to a wind-turbine-driven doubly fed induction generator (DFIG) is investigated. The setup allows the wind turbine system an uninterruptible fault ride-through of voltage dips. The DVR can compensate the faulty line voltage, while the DFIG wind turbine can continue its nominal operation as demanded in actual grid codes. Simulation results for a 2 MW wind turbine and measurement results on a 22 kW laboratory setup are presented, especially for asymmetrical grid faults. They show the effectiveness of the DVR in comparison to the low-voltage ride-through of the DFIG using a crowbar that does not allow continuous reactive power production.

Published in:

IEEE Transactions on Power Electronics  (Volume:26 ,  Issue: 3 )