University of Hertfordshire

From the same journal

By the same authors


  • MD

    Accepted author manuscript, 1.98 MB, PDF document

  • Mohamed Mansouri
  • Said Hassaine
  • Mhamed Larbi
  • Mohamed Bey
  • Tayeb Allaoui
  • Mouloud Denai
  • Mohamed Moudjahed
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Original languageEnglish
Pages (from-to)187-199
Number of pages13
JournalISA Transactions
Early online date29 Apr 2019
Publication statusPublished - 1 Nov 2019


The paper focuses on the design of position and speed observers for the rotor of a non-salient pole permanent magnet synchronous generator (NSPPMSG) coupled to a wind turbine. With the random nature of wind speed this observer is required to provide a position and speed estimates over a wide speed range. The proposed hybrid structure combines two observers and a switching algorithm to select the appropriate observer based on a modified weighting coefficients method. The first observer is a higher-order sliding mode observer (HOSMO) based on modified super twisting algorithm (STA) with correction term and operates in the medium and nominal wind speed ranges. The second observer is used in the low speed range and is based on the rotor flux estimation and the control by injecting a direct reference current different to zero. The stability of each observer has been successfully assessed using an appropriate Lyapunov function. The simulation results obtained show the effectiveness and performance of the proposed observer and control scheme.


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ID: 16676301