Active Vibration control and reduction of shear force of 5MW wind turbine with the help of gyroscope actuator

One of the main concerns in renewable energy technologies, such as wind turbines, is the economic cost and cost savings associated with its construction. Reducing the vibrations of a turbine structure can attenuate the fatigue damage caused by wind loads led to reduction in material consumption and cost. Besides, if the force and flexural moment at the base of the structure is reduced, a smaller foundation can be used to install the wind turbine. All of these factors have a positive impact on lowering the cost of a wind turbine. In this study, application of gyroscopic stabilization to decrease the wind-induced vibrations in 5 mega Watt wind turbine is studied. A valid FAST model is employed for this purpose. Moreover, two versions of the gyroscopic actuator including a passive stabilizer and an active gyroscopic actuator has been proposed. Furthermore, a PID controller has been designed to control the active system. The effect of gyroscope actuator on vibration, shear force and bending moment caused by wind loads is studied via extensive simulations. It was shown that the proposed system can reduce the decease the tip vibration, base shear and base moment by 32 percent in active mode and 14 percent in passive mode. As a result enclosing circle of foundation reduces 5 meter.