Experimental investigation and analytical modelling of active yaw control for wind farm power optimization

In this study, the physics and effectiveness of active yaw control under various wind conditions are investigated systematically, based on tunnel experiments a new analytical farm model. The power wake velocity measurements three-row miniature reveal that peak gain (18%) is reached in partial-wake conditions, when direction misaligned with turbine column by 2–4°. contrast, full-wake condition (5.4%) local minimum. For single-column farm, optimal angle distribution always exhibits decreasing trend from upstream to downstream, which can be associated secondary steering effect. Analytical model predicts increasing number rows, both leading-turbine increase asymptotically. maximum value mainly determined cosine exponent thrust coefficient (p). With typical p=1.8, approximately 30°. Turbulence intensity streamwise spacing have similar effects control. When these two parameters increase, relative decreases monotonically.