Title: Nonlinear control scheme based on a second order sliding mode: application to DFIG supplied by five-level PWM inverter

Authors: Ahmed Benzouaoui; Zoubir Ahmed-Foitih; Mohamed Fayçal Khelfi

Addresses: Electronic Department, University of Sciences and the Technology of Oran 'Mohamed BOUDIAF' (USTO), BP 1505 EL M'naouer Oran, Algeria ' Laboratory of Power Systems, Solar Energy and Automation, University of Sciences and Technology of Oran 'USTO-MB', Algeria ' Laboratory of Research in Industrial Computing and Networks, University of Oran 1 Ahmed Ben Bella, Algeria

Abstract: Adaptive control is a set of approaches used for the automatic adjustment of the controller parameters in order to achieve or maintain a certain level of performance when the parameters of the control process vary over time or unknown. The parameters of the controller are adapted to ensure also that there is no overestimation of the gain with real a priori unknown value of uncertainties. The proposed control approach consists in using second-order sliding mode with a dynamically adapted control gain that guarantees the stability and robustness of the control law even with the presence of uncertainties and perturbation of the system. The control is applied by simulation (Matlab-Simulink) on a doubly fed induction generator (DFIG) integrated into a variable speed wind turbine and controlled by super twisting sliding mode control. The simulations indicate the efficiency of the proposed approach especially in the case of change of the reference speed and/or the parameters variation.

Keywords: adaptive control; sliding mode; chattering; doubly fed induction generator; DFIG; five-level inverter; wind energy.

DOI: 10.1504/IJAAC.2019.100472

International Journal of Automation and Control, 2019 Vol.13 No.4, pp.498 - 516

Received: 23 Oct 2017
Accepted: 31 Jan 2018

Published online: 29 Jun 2019 *

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