基于LQR方法的大型风力机转矩控制建模与仿真  

MODELING AND SIMULATION FOR TORQUE CONTROL OF LARGE-SCALE WIND TURBINE BASED ON LQR METHOD

作　　者：杨显刚[1] 金鑫[1] 何玉林[1] 杜静[1] 

机构地区：[1]重庆大学机械工程学院,重庆400034

出　　处：《太阳能学报》2015年第6期1429-1434,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51005255);教育部高等学校博士学科点科研基金(20090191120005);中央高校基本科研业务费项目(106112015CDJXY110006)

摘　　要：当风速高于额定风速、小于切出风速时,恒电机转矩控制易导致传动链扭矩大幅波动,降低风力发电机组关键零部件的疲劳寿命。针对该问题建立基于状态空间的传动链线性化模型,采用线性二次型调节器(LQR)方法设计风力发电机的转矩控制器,将传动链一阶扭转模态对应的闭环极点向复平面的左侧移动,实现对传动链的动态加阻。通过Matlab7.1/Simulink中的控制器与FAST风力机模型的联合仿真表明该控制方法的有效性,即可提高传动链的阻尼,降低风力发电机组关键零部件的载荷。When wind speed is above rated wind speed and below cut-out wind speed generator can invoke large fluctuation in drive-chain torque and reduce the fatigue life turbine. To solve the problem, the Linear Quadratic Regulator （LQR） method was used , the constant torque control for of key parts/components of wind to design the torque controller of wind generator which turned the poles of closed loop corresponding to the first order drive chain torsion mode to the left side of the complex plane, and realized adding dynamic damping of drive train torque. Co-simulation for controller in Matlab 7.1/Simulink and FAST generator model show the validity of control methodology, which improves damping of drive-chain and reduces the loads of the key parts/components of wind turbine.

关 键 词：风力发电机 转矩控制 LQR 载荷优化 

分 类 号：TM614[电气工程—电力系统及自动化]