基于虚拟叶片模型的阵列风力机尾迹研究

Research on Array Wind Turbine Wake Based on Virtual Blade Model

研究考虑尾流效应的风电场气动控制策略优化技术,减少风电场尾流效应,是当前风电技术研究的热点之一。基于VBM模型研究了1.5MW同轴阵列风力机和9台错列或顺列布置风力机的尾流效应及气动偏航控制策略。通过调整风机偏航角度,改变尾流流动方向,得到了偏航角度对上下游风力机性能及全场功率水平的影响。研究发现,偏航控制可将尾迹偏离下游风轮中心位置,对上游风力机使用基于偏航的控制策略尾迹偏移效果显著。对于同轴阵列风力机,当上游风力机使用偏航控制时,上游的输出功率减小,但下游的输出功率增大,25°偏航控制时,下游风力机功率可增大59.1%。

Research on wind farm aerodynamic control strategy optimization control technology considering wake effect to reduce wind farm wake effect is one of the hot spots in current wind power technology research.Based on VBM model,the wake effect and aerodynamic yaw control strategy of 1.5 MW coaxial wind turbine and 9 staggered or aligned wind turbines were studied.By adjusting the yaw angle of the rotor and changing the flow direction of the wake flow,the influence of the yaw angle on the performance of the upstream and downstream wind turbines and the power level of the overall farm was obtained.It is found that the yawing control can deviate from the trailing windmill center position of the downstream wind turbine and the yawing-based control strategy for the upstream wind turbine to significantly shift the trailing effect.Coaxial array wind turbines,when the upstream wind turbine uses yaw control,the upstream output power is reduced,but the downstream output power is increased,and the 25° yaw control downstream wind turbine power increased by 59.1%.