以甘肃省桥东第一风电场为例, 针对风电机与大气流场之间的相互作用, 研究了单台风电机和整个风电场的理论出力与实际出力特征。结果表明: (1)单台风电机的实际出力与理论出力之比平均为0.7, 而风电场的风资源利用率平均值约为50%; (2)在该风电场中风电机尾流效应造成风速下降62.4%; (3)风电场中风电机的实际出力空间分布特征与风速的分布特征基本一致, 从上游到下游依次减小, 同时呈现中心小两侧大的特征。
By taking the first wind farm in Qiaodong,Gansu Province as an example,the theoretical and actual output characteristics of single wind turbine and the wind farm are studied based on the interaction between wind turbines and airflow field. The results show that: (1) the average ratio of actual output to theoretical output of a single wind turbine is 0.7,while the average ratio of wind resources utilization of the wind farm is 0.5. (2) The wind speed in the wind farm decreased by 62.4% caused by wake effect. (3) The spatial distribution characteristics of the actual output of the wind turbine in the wind farm are basically the same as those of the wind speed. It decreases from the upstream to the downstream, meanwhile, the center is smaller and the sides are bigger.
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