TY - JOUR AU - Lakhdar SAIHI AU - Youcef Bakou AU - Fateh Ferroudji AU - Abdelkader Hadidi AU - Ibrahim Oulimar PY - 2022/06/15 Y2 - 2024/03/28 TI - A Hybrid H∞-MRAS Observer of Wind Turbines Conversion Systems based on DFIG JF - Algerian Journal of Renewable Energy and Sustainable Development JA - AJRESD VL - 4 IS - 01 SE - Articles DO - UR - https://ajresd.univ-adrar.edu.dz/index.php?journal=AJRESD&page=article&op=view&path[]=157 AB - This study proposes the robust sensor-less advanced frequency control (robust H∞ control) of the system of wind turbine based on a doubly fed induction generator (DFIG), the power exchange between the machine stator and the network is achieved by applying the rotor of DFIG via a bidirectional converter. The purpose of the control is to regulate the stator active and reactive power produced by the DFIG using a robust H∞ controller. The Model reference and adaptive system (MRAS-Observer) uses the error between the actual and estimated values ​​(voltage/current) to construct the observed mechanical parameters (speed and position) value, this technique uses two separate models: the first is the reference model, the second is the adjustable mode. The error between these models is used by the adaptive mechanism. The adjustment mechanism is mostly a PI controller, to improve the performance and robustness of the classical MRAS observer, we replace the classical PI controller with a robust H∞ controller. The results simulations confirm the robustness of the sensorless robust H∞ control using the H∞-MRAS observer compared to conventional MRAS, which improves the quality and quantity of generated power. ER -