Semi-active vibration control of wind turbines blades including blade tower interaction

摘要

With the drive towards renewable, sustainable and environmentally friendly energy gathering momentum, wind turbine technology is leading the way forward as a realistic alternative to traditional fossil fuels. The aim of this research is to develop a theoretical model to study the dynamic behaviour of wind turbine blades and their interaction with the nacelle/tower. Equations of motion were derived for the system and Semi-active Tuned Mass Dampers (STMDs) added to the model. The blades were excited in the edgewise direction by steady and turbulent wind loading. The coupling in the system resulted in the occurrence of negative time varying damping terms. Numerical time history simulations were performed in Matlab to study the response of the system. The semi-active algorithm developed achieved good results in terms of mitigating vibrations in the blades and nacelle.