基于激光雷达测风数据的复杂地形下风力机尾流特性研究

Research on wake characteristics of wind turbine in complex terrain based on lidar data

以张家口某处风电场为实验场地,采用两台多普勒激光雷达(Wind3D 6000和WindMast WP350)分别测量风力机的尾流和来流风速,对全尾流、半尾流和独立尾流3种工况进行研究。结果表明,3种工况下随着尾流发展尾流宽度均不断变大,而尾流深度和速度衰减则不断减小;全尾流和半尾流工况中,上游风力机的存在会增加下游风力机尾流宽度,且全尾流比半尾流的增加量大;全尾流和半尾流工况中,相较于上游风力机,下游风力机尾流深度和速度衰减均较小。

Taking a wind farm in Zhangjiakou as the experimental site,the Wind3 D 6000 and WindMast WP35 Doppler lidars were used to measure the wake and incoming wind speeds of wind turbines respectively,and thre working conditions of full wake,half wake and independent wake were studied.Results showthat the wake widt increases with the development of the wake,while the depth and velocity decay of the wake decreases with th development of the wake under the three working conditions. Under the full wake and half wake conditions,th presence of the upstream wind turbine will increase the wake width of the downstream wind turbine,and the in crease of the full wake is greater than that of the half wake.Under the full wake and half wake conditions,com pared with the upstream wind turbine,the wake depth and velocity attenuation of the downstream wind turbine ar smaller.