University of Hertfordshire


  • Khalfallah Tahir
  • Ckeikh Belfedel
  • Tayeb Allaoui
  • Mouloud Denai
  • M'hamed Doumi
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Original languageEnglish
Article numbere2513
JournalEuropean Transactions on Electrical Power
Journal publication date18 Apr 2018
Early online date10 Jan 2018
Publication statusPublished - 18 Apr 2018


The paper proposes a new sliding mode power control strategy for a wound-field synchronous generator (WFSG)-based variable speed wind energy conversion systems (WECS) to maximize the power extracted from the wind turbine. The proposed controller can handle the inherent nonlinearities in WECS and the randomness of the wind speed as well as the uncertainties of the model and external disturbances. To reduce the chattering phenomenon which characterize conventional sliding mode control (SMC), a sigmoid function with a variable boundary layer is proposed. The adaptive switching gains are adjusted on-line using a fuzzy logic-based technique. Several simulation scenarios were performed to evaluate the performance of the proposed control scheme. The results demonstrate that this controller provides excellent response characteristics, is robust against parameter variations and free from chattering phenomenon as compared to the conventional SMC.


This is the peer reviewed version of the following article: Khalfallah Tahir, Cheikh Belfedal, Tayeb Allaoui, Mouloud Denai, and M’hamed Doumi, ‘A new sliding mode control strategy for variable‐speed wind turbine power maximization’, International Transactions on Electrical Energy Systems, Vol. 28 (4): e2513, April 2018, which has been published in final form at Under embargo until 10 January 2019. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

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