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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Improved direct power control of doubly-fed induction generator based wind energy generation system

Zhi, D. and Xu, L. and Morrow, John A. (2007) Improved direct power control of doubly-fed induction generator based wind energy generation system. In: IEEE International Electric Machines and Drives Conference (IEMDC 2007), 2007-05-03 - 2007-05-05.

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Abstract

This paper proposes an improved constant switching frequency direct power control (CSFDPC) strategy for doubly-fed induction generator (DFIG) based wind energy generation systems. Unlike the conventional vector control scheme which is based on rotor current decoupling control, the proposed CSFDPC strategy directly calculates the rotor voltage within each fixed sampling period to reduce the stator active and reactive power errors. Compared to the look-up-table based DPC strategy, constant switching frequency of the rotor side converter is achieved so as to ease the design of the converter and harmonic filter. In order to provide precise stator active and reactive power control and to reduce the steady-state power errors, several compensation strategies are introduced. Simulation results for a 2MW DFIG system are provided to demonstrate the effectiveness and the robustness of the proposed control strategy during variations of active and reactive power and rotor speed.