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<p>This paper presents a robust pitch-angle control strategy for a floating offshore wind turbine (FOWT) based on an optimized active disturbance rejection controller (OADRC). The suggested controller uses the Red-Tailed Hawk (RTH) optimization algorithm to automatically adjust the ADRC parameters. This makes the system better at rejecting disturbances and more robust overall. The optimization process minimizes a multi-objective cost function that combines generator-speed and power-tracking errors with fatigue-load indices on the tower and mooring lines. A high-fidelity nonlinear simulation environment was established by coupling OpenFAST with MATLAB/Simulink to evaluate the controller performance. When compared to a standard ADRC and a gain-scheduled proportional–integral (GSPI) controller, the proposed OADRC shows big improvements. It cuts generator-speed fluctuations by 82.9%, torque error by 56.1%, and tower damage-equivalent load by about 19%. The results confirm that the optimized ADRC provides an effective and model-free solution for achieving robust power regulation and structural-load mitigation in floating offshore wind turbines.&#xa0;</p>

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Robust Pitch-Angle Control of Floating Offshore Wind Turbines Using Optimized Active Disturbance Rejection Control

  • 期刊论文

  • 发表日期：

    2026年1月29日

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  • Seydali Ferahtia,
  • Azeddine Houari,
  • Mohamed Machmoum,
  • Mourad Ait-Ahmed

摘要

This paper presents a robust pitch-angle control strategy for a floating offshore wind turbine (FOWT) based on an optimized active disturbance rejection controller (OADRC). The suggested controller uses the Red-Tailed Hawk (RTH) optimization algorithm to automatically adjust the ADRC parameters. This makes the system better at rejecting disturbances and more robust overall. The optimization process minimizes a multi-objective cost function that combines generator-speed and power-tracking errors with fatigue-load indices on the tower and mooring lines. A high-fidelity nonlinear simulation environment was established by coupling OpenFAST with MATLAB/Simulink to evaluate the controller performance. When compared to a standard ADRC and a gain-scheduled proportional–integral (GSPI) controller, the proposed OADRC shows big improvements. It cuts generator-speed fluctuations by 82.9%, torque error by 56.1%, and tower damage-equivalent load by about 19%. The results confirm that the optimized ADRC provides an effective and model-free solution for achieving robust power regulation and structural-load mitigation in floating offshore wind turbines.