Title: Power oscillations cancellation strategy control of DFIG wind turbine during grid voltage dip

Authors: Hakima Bahlouli; Abdellah Mansouri; Mohamed Bouhamida; Ali M. Eltamaly; Larbi Djilali

Addresses: AVCIS Laboratory, University of Sciences and Technology of Oran Mohamed-Boudiaf Oran, Algeria ' LAAS Laboratory, ENP Oran, Algeria ' AVCIS Laboratory, University of Sciences and Technology of Oran Mohamed-Boudiaf Oran, Algeria ' Sustainable Energy Technologies Center, King Saud University, Riyadh 11421, Saudi Arabia ' Universidad Autonoma del Carmen, Carmen, 24180, Campeche, Mexico

Abstract: Wind energy conversion systems (WECSs) based on doubly fed induction generators (DFIGs) are considered prominent technologies in wind energy systems. However, complying with grid code requirements necessitates maintaining wind turbine connectivity during network voltage dips. As the stator of the DFIG is directly linked to the grid, the generator stability is mostly affected by grid voltage dips. This paper proposes a direct power control strategy based on a reference generation approach to enhance the transient behaviour of DFIG during grid voltage dips and the subsequent recovery period. By eliminating the reliance on sequential decomposition methods and reducing the need for crowbar protection, the proposed control method achieves improved performance. The control method employs a sliding mode control strategy to expedite convergence time, while the control parameters are tuned using a fuzzy logic strategy to facilitate adaptation to external disturbances. Results demonstrate that the proposed strategy reduces rotor overcurrent, ensures a stable reactive power supply during voltage dips, and preserves the grid connection of the wind turbine.

Keywords: second order sliding mode; LVRT capability; robust control; symmetrical dip; doubly fed induction generator; DFIG.

DOI: 10.1504/IJPELEC.2024.139444

International Journal of Power Electronics, 2024 Vol.20 No.1, pp.22 - 40

Received: 10 Apr 2023
Accepted: 21 Aug 2023
Published online: 02 Jul 2024 *

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