MW级风电机液压变桨系统设计与动态分析

Design and dynamic analysis on hydraulic variable pitched propeller system of mega-watt graded wind power ge-nerator

针对大功率风电机变桨机构的特点和控制要求,采用电液比例控制和三联同步缸的结构设计了能够实现位置反馈、速度控制和三缸同步的液压变桨系统,该系统能够使风机在各种条件下可靠停车。通过系统建模和计算机数值仿真分析,得知所设计的系统是稳定的。经与实测数据对比,验证了模型与实际系统特性的吻合程度。

Aimed at the characteristics and controlling requirements of the variable pitched propeller mechanism of high powered wind generator, a hydraulic variable pitched propeller system that could realize the position feedback, the speed control and the synchronization of three cylinders was designed by adopting the structures of electro-hydraulic ratio control and synchronous triple cylinder. This system could enable the wind generator to stop working reliably under various conditions. By means of system modelling and numerical simulation analysis of computer it has been transpired that the being designed system is steady-going. By way of comparison with the actually measured data, the coinciding extent between the model and the characteristics of practical system was verified.