基于AMESim的风力发电机的液压马达启动特性的研究

Property Research on Hydraulic Motor in Wind Turbine Based on AMESim

兆瓦级大型风力发电机的偏航系统通常采用电机驱动,但是偏航速度和电机速度相差较大,造成减速机的尺寸大、质量大、安装维护比较复杂;另外还存在偏航电机启动电流大、偏航负载变化频繁、偏航位置不易精确控制的问题。针对以上问题,提出液压马达的比例系统控制方案,建立了液压马达的数学模型,利用AMESim软件对液压马达的启动、工作过程中转动惯量、负载扭矩、阻尼系数进行研究;采用阶跃信号对液压马达进行仿真,对仿真结果进行分析,验证理论的合理性和可行性。结果表明:液压控制方案在降低偏航减速比、减轻减速机尺寸和质量、提高偏航位置控制精度方面具有独特的优势。

The MW wind generator yaw system is usually driven by a motor,but the differences of yaw velocity and motor speed are relatively large,so the ratio of the reducer is very large,Its size is often relatively large. Moreover,the yaw motor still exists big starting current,the yaw load changes frequently,the control of yaw position is more complex. The execution of energy transfer of high density,small size,space saving,convenient maintenance compared with hydraulic. Aiming at above problems,proportional control scheme for the hydraulic motor was proposed. First of all,the mathematical model of the hydraulic motor was established. The AMESim software the hydraulic motor start,inertia in the work process of,load torque and damping coefficient. The step signal was used to simulate the hydraulic motor. the simulation results verify the rationality and feasibility of the scheme. At the same time,they also verify the hydraulic control scheme. It has unique advantages in fan control,lightweight,energy utilization and so on.