Active generator control of tower and spar vibrations of spar-type floating offshore wind turbines
This paper proposes the idea of using the active generator torque for controlling tower side-side vibration and spar roll motion of the spar-type FOWT.The generator torque affects the tower side-side vibration and spar roll motion through the reaction on the generator stator that is rigidly fixed to the nacelle.This torque can be prescribed to a certain value with negligible time delay,leading to high potential of performing feedback control of floating wind turbines.In order to evaluate the active generator controller,a reduced order 16-degreeof-freedom(DOF)aero-hydro-elastic model of a FOWT is first developed,taking into consideration important dynamic characteristics of the system.Both aerodynamic loads on the blade and hydrodynamic loads on the spar are modelled using classical theory,and a mooring line model is also included.Next,the torque transfer mechanism from the drivetrain to the tower and spar are derived,and the relationship between the generator torque with the tower side-side vibration and spar roll motion are presented.Based on this,an active control algorithm is proposed using the active generator torque with feedback from the tower and spar velocities.Numerical simulations show promising results.
Floating wind turbines reduced-order model active vibration control generator controller torque transfer mechanism
Zili Zhang Christian E.H(o)eg Biswajit Basu S(o)ren R.K.Nielsen
Department of Engineering,Aarhus University,Aarhus,Denmark School of Engineering,Trinity College Dublin,Dublin,Ireland Department of Civil Engineering,Aalborg University,Aalborg,Denmark
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1405-1412
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）