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Lookup NU author(s): Dr Van-Tung Phan
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The main cause of degradation in an unbalanced stand-alone doubly-fed induction generator (DFIG) system is negative sequence components that exist in the generated stator voltages. To eliminate these components, a hybrid current controller composed of a proportional-integral controller and a resonant regulator is developed in this paper. The proposed controller is applied to the rotor-side converter of a DFIG system for the purpose of compensating the negative stator voltage sequences. The proposed current controller is implemented in a single positive rotating reference frame and therefore the controller can directly regulate both the positive and negative sequence components without the need for sequential decomposition of the measured rotor currents. In terms of compensation capability and accuracy, simulations and experimental results demonstrated the excellent performance of the proposed control method when compared to conventional vector control schemes.
Author(s): Phan Van-Tung, Lee Hong-Hee, Chun Tae-Won
Publication type: Article
Publication status: Published
Journal: Journal of Power Electronics
Print publication date: 01/11/2010
ISSN (print): 1598-2092
ISSN (electronic): 2093-4718
Publisher: Korean Institute of Power Electronics
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