用于风电场群规划的风电场尺度尾流模型研究

Study on Wake Model of Wind Farm Scale Used in Wind Farm Group Planning

风电场的尾流最长可延伸至数十公里,上游风电场尾流会对下游风电场发电量产生显著影响。因此,在风电场建设中需要考虑风电场间尾流效应。基于工程尾流模型仿真模拟,研究了风电场在不同湍流强度以及不同排布密度下尾流区风速分布情况。提出了关于阻滞参数与湍流效应参数的双参数风电场尾流半经验数学模型。通过与我国北方某风电基地实测数据对比,结果表明:所提风电场模型模拟结果与实测结果相符合,能够较好地表达风电场尾流平均风速的变化规律,对未来大型风电基地规划有指导意义。

The wake of a wind farm can extend up to tens of kilometers,and the wake of the upstream wind farm will have a significant impact on the power generation of the downstream wind farm.Therefore,the wake effect between wind farms needs to be considered in the construction of wind farms.Based on the simulation of the engineering wake model,the wind speed distribution in the wake region of the wind farm under different turbulence intensities and different arrangement densities is studied.A semi-empirical mathematical model of wind farm wake with two parameters about retardation parameters and turbulence effect parameters is proposed.By comparing with the measured data of a wind power base in northern China,the results show that the simulation results of the proposed wind farm model are consistent with the measured results,and can be compared with the measured results.A good expression of the variation law of the average wind speed in the wake of wind farms has guiding significance for the planning of large-scale wind power bases in the future.