Robust Sliding-Backstepping Mode Control of a wind system based on the DFIG Generator

Abstract

This paper presents a new contribution in the field of the optimization of the techniques of control of the wind systems, and the improvement of the quality of energy produced in the grid. The use of the Sliding Mode control technique gives quite interesting results, but its major drawback lies in the phenomenon of chattering (oscillations) which reduces the precision of the system. we propose in this work a solution to cancel this chattering phenomenon, by the implication of the adaptive Backstepping technique to control the powers of the double-fed asynchronous generator (DFIG) connected to the electrical network by two converters (network side and side machine) in the nominal part of the sliding mode model. This hybrid technique will correct errors of precision and stability and the performance of the wind system obtained in terms of efficiency, active and reactive power are very important. First, a review of the wind system was presented. Then, an exhaustive explanation of the Backstepping technique based on Lyapunov stability and optimization method has been reported. Subsequently, a validation on the Matlab & Simulink environment was carried out to test the performance and robustness of the proposed model. The results obtained from this work either by follow-up or robustness tests show a great improvement in terms of performance compared to other control techniques.

Full Operational Envelope Control of a Wind Turbine Using Model Predictive Control

“…However, the obtained results are ineffective regarding robustness and the chattering phenomenon. A robust sliding-backstepping technique, which improves the control system's performance in terms of parameter variations of the turbine, is presented in [20].…”