Energies 2013, 6(3), 1181-1197; doi:10.3390/en6031181
Article

Improved Control Strategy for DFIG Wind Turbines for Low Voltage Ride Through

Received: 20 November 2012; in revised form: 20 February 2013 / Accepted: 20 February 2013 / Published: 25 February 2013
(This article belongs to the Special Issue Wind Turbines 2013)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: This paper presents an improved control strategy for both the rotor side converter (RSC) and grid side converter (GSC) of a doubly fed induction generator (DFIG)-based wind turbine (WT) system to enhance the low voltage ride through (LVRT) capability. Within the proposed control strategy, the RSC control introduces transient feed-forward compensation terms to mitigate the high frequency harmonic components and reduce the surge in the rotor currents. The proposed GSC control scheme also introduces a compensation term reflecting the instantaneous variation of the output power of the rotor side converter with consideration of the instantaneous power of grid filter impendence to keep the dc-link voltage nearly constant during the grid faults. To provide precise control, non-ideal proportional resonant (PR) controllers for both the RSC and GSC current regulation are employed to further improve dynamic performance. Simulations performed in Matlab/Simulink verify the effectiveness of the proposed control strategy.
Keywords: doubly fed induction generator (DFIG); low voltage ride through (LVRT); grid defaults
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MDPI and ACS Style

Wu, Z.; Zhu, C.; Hu, M. Improved Control Strategy for DFIG Wind Turbines for Low Voltage Ride Through. Energies 2013, 6, 1181-1197.

AMA Style

Wu Z, Zhu C, Hu M. Improved Control Strategy for DFIG Wind Turbines for Low Voltage Ride Through. Energies. 2013; 6(3):1181-1197.

Chicago/Turabian Style

Wu, Zaijun; Zhu, Chanxia; Hu, Minqiang. 2013. "Improved Control Strategy for DFIG Wind Turbines for Low Voltage Ride Through." Energies 6, no. 3: 1181-1197.

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