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Dynamic modeling and control of doubly fed induction generators driven by wind turbines

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1 Author(s)
Wei Qiao ; Dept. of Electr. Eng., Univ. of Nebraska - Lincoln, Lincoln, NE

Two different models are presented and developed in PSCAD/EMTDC to represent a variable-speed wind turbine equipped with a doubly fed induction generator (DFIG). One is the most detailed switching-level (SL) model. The other is a simplified fundamental-frequency (FF) model. The effect of different shaft system representations on the dynamic behavior of the wind turbine generator (WTG) system and the issue of damping low-frequency torsional oscillations are investigated. Dynamic and transient simulation studies are carried out to compare two models with different shaft system representations. Results show that the FF model is sufficient while the lumped- mass shaft model is insufficient to represent the dynamic behavior of the WTG. The FF model with the two-mass shaft representation is therefore recommended to represent the DFIG wind turbines for power system dynamic and transient studies.

Published in:

Power Systems Conference and Exposition, 2009. PSCE '09. IEEE/PES

Date of Conference:

15-18 March 2009