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Energies 2017, 10(11), 1788; doi:10.3390/en10111788

Sliding Mode Control of DFIG Wind Turbines with a Fast Exponential Reaching Law

School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Received: 29 September 2017 / Revised: 24 October 2017 / Accepted: 26 October 2017 / Published: 7 November 2017
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

This paper proposes a novel sliding mode control (SMC) technique for doubly fed induction generators (DFIGs) based on the fast exponential reaching law (FERL). The proposed FERL-based SMC is capable of reducing to a large extent the chattering phenomena existing in the sliding stage. Meanwhile, the reaching stage is accelerated with the introduction of an adaptive gain. The proposed method is employed in a DFIG-based wind energy conversion system (WECS) for direct power control (DPC). The FERL-based DPC approach is tested with simulations conducted in Matlab/Simulink under the scenarios of unbalanced grid voltage, grid fault conditions and highly unstable wind speed accompanied by an experimental study. The simulations and experimental results reveal the better performance of the proposed control method in active/reactive power tracking and dc-link voltage maintenance. View Full-Text
Keywords: active/reactive power tracking; chattering phenomenon; doubly fed induction generator (DFIG); fast exponential reaching law (FERL); reaching speed; sliding mode control (SMC); voltage sag active/reactive power tracking; chattering phenomenon; doubly fed induction generator (DFIG); fast exponential reaching law (FERL); reaching speed; sliding mode control (SMC); voltage sag
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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. (CC BY 4.0).

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Xiong, L.; Li, P.; Li, H.; Wang, J. Sliding Mode Control of DFIG Wind Turbines with a Fast Exponential Reaching Law. Energies 2017, 10, 1788.

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