Session: 01-11-01: Wind Energy

Paper Number: 107242

107242 - Structural Performance of Wind Turbines Under Active Yaw Control and Wake Effects 

Active yaw control has been proved to be the most promising active wake control strategies to maximize the total power generation of wind farms. Meanwhile, structural performance needs to be considered carefully in yaw misalignment in case the adverse structural performance offsets its benefit in power enhancement. In this study, numerous high-fidelity aeroelastic simulations were conducted to figure out the fatigue loads of wind turbines under yaw control. Inflow conditions including wind speed, shear exponent and turbulent intensity are considered to generate a variety of free streams. More importantly, since most wind turbines in wind farms are exposed to the wake of their upstream counterparts, the structural performance of wind turbines under the combination of wake effects and yaw control is given special attention by producing various wake conditions. With the change of yaw angles, free-stream and wake conditions on fatigue loads are analyzed in depth through a comparative analysis. Afterward, a machine learning-based prediction method is proposed to accurately estimate the fatigue loads and power of wind turbines under yaw control. Fatigue loads at critical turbine components and corresponding power yields are selected as outputs to reflect the performance of yawed wind turbines. The results show that the proposed prediction method can return high regression coefficients and low deviation, proving its accuracy and robustness.

Presenting Author: Ruiyang He the Hong Kong Polytechnic University

Presenting Author Biography: Mr. Ruiyang He is a phd student who majors in wind energy at the Hong Kong Polytechnic University.

Authors:

Ruiyang He the Hong Kong Polytechnic University
Hongxing Yang The Hong Kong Polytechnic University
Xiaowei Deng The University of Hong Kong