Wind turbines operating under highly variable wind conditions require effective pitch-angle control to ensure maximum energy capture and structural protection. This study examines the performance of a 2.5 MW GEWE-B2.5-100 horizontal-axis wind turbine by quantifying how pitch-angle regulation affects power limitation, rotor-speed stability, and mechanical loading. Using an aerodynamic model, the maximum power point (MPP) was identified at an optimal mechanical angular speed of ωOPTIM = 240.45 rad/s for V = 10 m/s, and the corresponding pitch-angle adjustments were determined for wind speeds up to 26 m/s, where β increases from 9.28° to 29.06° to maintain safe operation. Three dynamic case studies were conducted. Under sinusoidal wind variations between 10 and 14 m/s, PI-based pitch control limited rotor-speed oscillations to below 0.1%, ensuring stable operation. For exponential wind increases to 24 m/s and 34 m/s, the pitch angle rose to 28.48°, with rotor-speed overshoot remaining minimal at 0.004% and 0.006%, respectively. As stated in the manuscript, “dynamic pitch angle control significantly reduces rotor speed oscillations and mitigates excessive which indirectly contributes to alleviating potential structural stresses”. These results show that pitch-angle control is a key factor in turbine performance, enabling precise power capping at 2.178 MW and ensuring structural safety under extreme wind conditions. The proposed strategy supports reliable integration of large wind turbines into modern power systems.
Chioncel et al. (Sat,) studied this question.