Robust adaptive Backstepping Control for Wind Energy Systems with Uncertain PMSGs

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This paper deals with a robust nonlinear adaptive speed control scheme based on backstepping control strategy for a variable speed wind energy conversion system with uncertain permanent magnet synchronous generator (PMSG). The focal aim of this robust control is to maximize wind energy extraction. First, a nonlinearity compensation method based on the pure input–output feedback linearization controller design, is introduced without any uncertainties of the system parameters. Nevertheless, this method is great sensitive to both parameter uncertainties, and load torque disturbance. To overcome this problem and to achieve the maximum power extraction, parameter adaptation laws and adaptive backstepping control scheme are derived, which permits to compensate both variable-speed PMSG wind turbine parameter uncertainties and load torque disturbance. The simulation results demonstrate the effectiveness and robustness of the proposed adaptive backstepping control scheme
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wind energy conversion system, PMSG, adaptive control, parameter uncertainty, maximum power extraction, Backstepping, robustness.

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