水平轴风力机气动转矩模型优化研究

Research on Aerodynamic Torque Model Optimization of Horizontal Axis Wind Turbine

为得到风电机组并网发电控制精准的控制指令,基于控制需求探究风力机的输出特性规律,并对其气动转矩进行精准建模。将实测数据与ANSYS仿真相结合,对AH-30 kW变桨距风力发电机叶片形变受典型材质影响和输出特性规律进行研究。结果表明:中小型风力机因叶片材质不同而产生的弹性形变为细微形变,对风力机转矩模型和机组控制影响可忽略。风力机输出转矩受风影响存在较大波动和抖颤,需全面考虑多源扰动对机组控制性能的影响。利用实测数据与Fluent仿真相结合手段,修正后的风力机气动转矩数学模型与Fluent仿真输出误差为5.6%,能够较好反映真实风力机输出特性,为风电机组的并网发电控制奠定了一定理论基础。

To obtain accurate control instructions for grid-connected power generation control of wind turbines,the output characteristics of wind turbines are explored based on control requirements,and their aerodynamic torque is accurately modeled.Combined with the measured data and ANSYS simulation,the blade deformation of AH-30 kW variable pitch wind turbine is studied under the influence of typical materials and the output characteristics.The results show that the elastic deformation of small and medium-sized wind turbines due to different blade materials is small deformation,and the influence on the torque model of wind turbines and unit control can be ignored.The output torque of wind turbine fluctuates and quivers greatly under the influence of wind.It is necessary to comprehensively consider the impact of multi-source disturbances on the control performance of the unit.By combining the measured data with Fluent simulation,the output error between the corrected mathematical model of wind turbine aerodynamic torque and the Fluent simulation is 5.6%.It can reflect the real output characteristics of wind turbines,and it lays a theoretical foundation for the grid-connected power generation control of wind turbines.