An Adaptive Pitch Control Strategy for Wind Turbines Using PIO‐Optimized Parallel Observation Deviation‐Coupled Linear Active Disturbance Rejection Control

ABSTRACT Mitigating asymmetric aerodynamic loads while maintaining stable power output remains a significant challenge for large‐scale wind turbines. This paper presents a parallel observation deviation‐coupled linear active disturbance rejection control (PODC‐LADRC) scheme for the pitch control of wind turbines. The pigeon‐inspired optimization algorithm is incoporated to resolve parameter tuning complexities inherent in linear disturbance rejection control (LADRC). The proposed control strategy utilizes a dual‐loop parallel observation architecture that overcomes the sequential tracking limitations of conventional LADRC, enabling near‐zero delay disturbance estimation while maintaining better trajectory tracking accuracy. Performance evaluation via co‐simulation with FAST and Simulink demonstrates substantial improvements across various wind regimes. Under turbulent wind conditions, the PODC‐LADRC reduces average rotor moment and load variance by 58.4% and 38.2%, respectively, compared to conventional PI control. Furthermore, relative to conventional LADRC, the strategy achieves a 23.5% reduction in average moment and a 24.1% reduction in variance. Peak moment values are consistently attenuated across steady, step and gust conditions, thereby ensuring enhanced mechanical integrity and stable power generation.