功率分流式液压机械无级恒转速驱动器设计

Design of Power Split Hydro-mechanical Stepless Constant Speed Driver

在功率分流的基础上,采用机械传动和液压传动并联的形式设计一种应用于大功率风力发电的液压机械无级恒转速驱动器,建立其机械结构模型和液压调速系统模型,进行转速特性分析,并推导出了其动态传动比。采取非对称饱和增量式PID控制策略,使得传动比随着系统输入的变化而自动无级的进行调节,从而保证驱动系统恒转速输出,系统输出带动永磁同步发电机进行恒速恒频发电。利用仿真软件Adams和AMESim对其进行联合仿真,结果表明,液压机械无级恒转速驱动器可以实现很好的调节,同时也具有很高的效率,且始终保持在90%以上。同时为液压机械无级恒转速驱动器的工程应用提供了一定的理论参考。

Design a hydraulic machine constant speed stepless drive which applied to high-power wind power gener- ation, by the parallel form of mechanical transmission and hydraulic transmission on the basis of shunt power . Es- tablish the model of mechanical structure and hydraulic control system, and carries on rotate velocity characteristic analysis , derived the dynamic transmission ratio. Take the control strategy of asymmetric saturation incremental PID, make the transmission ratio automatically adjust to the change of the system input and ensure its constant speed output which drive the generator to permanent magnet synchronous generator. Combined simulated by Adams and AMESim, the simulation results show that the hydraulic machine constant speed stepless drive can achieve good adjustment, and timely continuous changes, and keep the ratio in an better value, which makes the system the highest output efficiency which is above 90%. At the same time, it provides a theoretical reference for the engi- neering application of the hydraulic mechanical continuously constant speed driver.