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An improved control strategy using PI-resonant controller for unbalanced stand-alone doubly-fed induction generator

Lookup NU author(s): Dr Van-Tung Phan

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Abstract

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.

Publication metadata

Author(s): Phan Van-Tung, Lee Hong-Hee, Chun Tae-Won

Publication type: Article

Publication status: Published

Journal: Journal of Power Electronics

Year: 2010

Volume: 10

Issue: 2

Pages: 194-202

Print publication date: 01/11/2010

ISSN (print): 1598-2092

ISSN (electronic): 2093-4718

Publisher: Korean Institute of Power Electronics

URL: http://dx.doi.org/10.6113/JPE.2010.10.2.194

DOI: 10.6113/JPE.2010.10.2.194

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