考虑RNA运行作用的近海风电结构主动质量阻尼器振动控制研究

Active mass damper vibration control of offshore wind turbine structure considering RNA operation

由于风电塔上部的风轮-机舱组件(rotor-nacelle assembly, RNA)在运行状态中的非线性控制策略,风电塔顶加速度频响特征复杂,其中风轮3倍转频激励(3P)响应最为突出。考虑一种单自由度等效风电塔模型,通过OpenFAST软件确定RNA运行作用下的结构动力参数与气动荷载,开展了基于线性二次型调节(linear quadratic regulator, LQR)算法的主动质量阻尼器(active mass damper, AMD)对风电塔顶前后向加速度响应的控制研究,以被动调谐质量阻尼器(tuned mass damper, TMD)为对照考察了AMD的减振性能与控制特点。结果表明:在RNA运行作用下,AMD具有比TMD更好的控制表现,其控制作用可一定程度抑制3P频段的响应。

Due to nonlinear control strategy of rotor-nacelle assembly(RNA)in upper part of wind turbine tower during operation,frequency response characteristics of acceleration at top of wind turbine tower are complex,in which responses to wing turbine 3 times rotating frequency excitations(3Ps)are the most prominent.Here,considering a single-DOF equivalent wind tower model,the structural dynamic parameters and aerodynamic load under RNA operation were determined using the software OpenFAST.Controls of forward and backward acceleration responses of wind tower top using active mass damper(AMD)were studied based on linear quadratic regulator(LQR)algorithm.The vibration reduction performance and control characteristics of AMD were investigated with passive tuned mass damper(TMD)as a cross reference.The results showed that AMD has better control performance than TMD under RNA operation,and its control action can suppress responses of 3P frequency band to some extent.