摘要
建立了风力发电机独立变桨距系统的线性化模型。为了便于控制器设计,通过Park坐标变换将叶根的弯矩转换到两个固定的直交坐标系,对两个坐标系分别设计无模型自适应控制器进行载荷控制。在NREL建立的风力发电机模型FAST上对设计好的控制器进行了验证,结果表明基于MFA的独立变桨距控制器可以有效消除风力机上的不平衡载荷。与统一变桨距控制相比,叶轮俯仰弯矩最大峰值减小62.5%,偏转弯矩最大峰值减小60.1%,独立变桨距技术的采用对功率的输出影响不大。
A linear model for individual pitch of wind turbine system was established,and the loads of blade roots were transferred into a mean value and variations on two orthogonal axis using Park＇s transformation.The model-free adaptive controllers（MFA） were designed to control the loads components of the two orthogonal axes.The wind turbine nonlinear model FAST built by NREL was used to verify the controller.Test results showed that individual pitch based on MFA could eliminate the imbalance loads effectively.Compared to collective pitch control,the for-aft torque was decreased by 62.5%,yaw torque was decreased by 60.1%,and the value of output power changed a little.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2011年第2期109-114,129,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家高技术研究发展计划(863计划)资助项目(2001AA512020)
