摘要
对风力发电系统独立变桨距控制原理进行阐述。建立了风力发电机组桨叶载荷的数学模型,利用Coleman坐标变换实现了将桨叶上的载荷转换成轮毂处倾斜方向和偏航方向的疲劳载荷,并且实现了二者的解耦,简化了控制器的设计;之后利用Coleman逆变换实现了桨距角的微调。该控制系统根据随机风速的变化,利用独立变桨控制对风力机桨叶桨距角进行实时调节,以达到减小风电机组关键部件载荷的目的。仿真结果表明,当风速达到额定值以上时,该控制策略在统一变桨距控制的基础上,不仅保证输出功率近似相等,而且减小了桨叶所承受的疲劳载荷,也减小了风力机组其他关键部件的疲劳载荷。
The principle for individual pitch control （IPC） of wind power generation system is expounded in this paper. Mathematics model of wind power generators for load of blade is built, and Coleman transformation achieves coordinate transition from blades of load to tilt and yaw direction fatigue load, and realizes decoupling, so design of controller is simplified ; Then using inverse Coleman trans- formation achieves adjustment of pitch angle. The IPC adjusts pitch angle for wind turbine in time according to change of random wind speed in order to reduce fatigue load of key components on wind turbines . Computer simulation shows that when speed of wind reaches rated value above, this control strategy based on collective pitch control not only ensures output power approximately equal, but also re- duces the fatigue load of blade and other key components.
出处
《控制工程》
CSCD
北大核心
2014年第2期219-222,共4页
Control Engineering of China
基金
中国博士后科学基金特别资助(201003553)
留学回国人员科研启动资金(教外司留[2011]1568号)
关键词
风力发电系统
独立变桨距控制
载荷优化
wind power generation system
individual pitch control
load reduction
