摘要
变桨机构通过调节风机叶片的节距角来保证风机在多变环境下的稳定运行.变桨距系统利用曲柄连杆机构与叶片连接,实现直线往复运动与旋转运动的转换,机构形式使叶片转动的阻力矩与液压缸负载力存在非线性关系.以1 MW风机为例,根据曲柄连杆机构的运动转换关系,分析了液压缸负载力的非线性变化,并采用功率键合图法结合控制信号的方块图模型,建立了系统的数学模型,为系统优化提供了理论依据.
Pitch control system of wind turbine is used to adjust the pitch angle of vanes to ensure stable operation of the wind turbine.Crank-link mechanism connects cylinder and vane,translating linear movement into rotation.The crank-link mechanism produces a nonlinear transformation.The modeling of the system has to take into consideration of such a transformation.The author analyzed the effect of eccentric block on load variation based on the case of 1 MW wind turbine.Specified to the load variation feature during operation,the author conducted a research on its dynamic characteristics.Based on bond graph method,the system’s mathematical model was developed in the form of state equation,which provides theoretical basis for simulation and other further research.
出处
《机械与电子》
2012年第7期28-31,共4页
Machinery & Electronics
基金
国家科技支撑计划课题(2007BAF12B01)
关键词
风力发动机
变桨距
键合图
数学模型
wind turbine； pitch variable control； bond graph； methmatic model
