The main purposes of this paper are to analyse and to compare power quality, modes of machine operation and robusness under two difference control strategies on DFIG-based wind turbine systems: (1) Rotor speed control strategy (RSCS) and (2) Power control strategy (PCS). Both of these strategies could be utilized to maximize wind-power harvesting.In this work, the feedback control loops are designed by using the same optimum Proportional Integral-based vector control strategy. The major focus in this study is on a small-scale wind turbine that characterized by a small mass moment of inertia. By using simulation studies, it is found that the power dynamicresulted by the two control strategiesunder fluctuating wind conditions arerelatively different: the power generated underthe RSCSis more fluctuate compare to the PCS. Even, for extreme cases where the wind speed changes suddenly, the utilization of the RSCSfor a while could bring the machine enters to the motoring mode.In the motoring mode, instead delivering power to the grid, the stator windings of the DFIG will absorb some power from the grid. From simulation results, it is also found that the RSCSin general is less robust compared to the PCS.

Original languageEnglish
Pages (from-to)110-120
Number of pages11
JournalInternational Review of Electrical Engineering
Issue number2
Publication statusPublished - 2017


  • DFIG
  • Motoring Mode
  • Power Control Strategy
  • Rotor Speed Control Strategy


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