基于风速衰减因子法的大型风电场尾流效应模拟方法研究

发布时间：2018-10-26 17:27

【摘要】：在大型风电场尾流计算中,多台风机的尾流叠加方法一直是个难点。传统的尾流叠加方法均基于实际风速值,导致模型复杂、计算必须依据气流流经风机的顺序,且由于风机尾流之间的覆盖关系较为复杂,容易出现漏算、重复计算的问题。提出风速衰减因子(尾流风速与来流风速之比,Rv)及基于风速衰减因子的风电场尾流计算方法,称为风速衰减因子法(Rv法)。该方法物理意义明确、简单易行,可按照任意风机顺序进行计算,避免漏算、重复计算问题。此外,基于实例风电场,采用法模拟了尾流影响下全部风机的功率情况,对比显示模拟结果与实测数据较为一致(相关性系数0.86);采用Rv法模拟了风电场三维尾流分布,并与实测风廓线进行了对比,对比结果显示在大气稳定条件下,模拟结果与实测数据较为一致。
[Abstract]:In the wake calculation of large scale wind farm, the method of wake superposition is always a difficulty. The traditional wake superposition method is based on the actual wind speed, which leads to the complexity of the model. The calculation must be based on the order of the flow through the fan, and because of the complexity of the covering relation between the wake of the fan, it is easy to cause the problem of missing calculation and repeated calculation. Wind attenuation factor (, Rv) and wind farm wake calculation method based on wind speed attenuation factor (Rv method) are proposed. The physical meaning of the method is clear, simple and practical, and can be calculated according to any fan order, avoiding the problem of missing calculation and repeated calculation. In addition, based on the example of wind farm, the power situation of all fans under the influence of wake flow is simulated by using the method. The comparison shows that the simulation results are in good agreement with the measured data (correlation coefficient 0.86). The three-dimensional wake distribution of wind farm is simulated by Rv method, and compared with the measured wind profile. The comparison results show that the simulation results are in good agreement with the measured data under the condition of stable atmosphere.
【作者单位】：新能源与储能运行控制国家重点实验室(中国电力科学研究院);甘肃省新能源并网运行控制重点实验室(甘肃省电力公司风电技术中心);国家电投集团北京电能碳资产管理有限公司;
【基金】：国家电网公司科技项目(全球可再生能源综合评估与深化研究) 北京市科委计划项目(Z161100002616039)~~
【分类号】：TM614

【相似文献】