Abstract:Inordertoobtainoptimallayoutofoffshorewindfarmstoreducewakeloss,thewakeobservationexperimentwascarriedoutinanoffshorewindfarminJiangsu,andthe3D-Lidarwasusedtomeasurethewake-flowdata.Thewakecharacteristicssuchaswakelength,wakewidthandwakedepthunderthreewakeconditionsofindependentwake,halfwakeandfullwakewerestudied.Theresultsshowthat,thewakelengthisabout11D~12D(Distherotordiameter)andtheinfluenceofwakeisweakenedundertheindependentwakecondition;inthenearwakeregion,thewindspeedattenuationunderthefullwakeconditionissignificantlyhigherthanthatunderindependentandhalfwakeconditions;butinthefarwakeregion,thechangingtrendofthethreewakeconditionsisthesame,andthewakewidthisabout3D,showing“doubleGaussian”or“concave”distribution,andthedifferenceisrelatedtothedistancebetweenadjacentwindturbines;underthethreekindsofwakeconditions,thewakedepthinthenearwakeregionwherethewakevelocitylossisobviousislargerthanthatinthefarwakeregion.Keywords:offshorewindfarm;scanninglidar;wakecharacteristics;wakeconditions摘要：为有效优化实际业务中海上风电场的机组排布方案设计，降低尾流电量损失，在江苏某海上实际运行风电场采用3D扫描雷达进行实地尾流观测实验，分析独立尾流、半尾流和全尾流三种工况下机组的尾流长度、尾流宽度及尾流深度等尾流特性。研究表明，独立尾流工况下机组尾流下游方向11D~12D（D为叶轮直径）距离处风速变化趋平，尾流影响减弱，机组尾流影响长度在11D左右；近尾流区内，全尾流工况机组的风速衰减较独立尾流和半尾流工况机组明显增大，远尾流区三种工况变化趋势一致，尾流宽度均在3D左右，呈“双高斯”或“凹型”分布特征。二者的差异性主要与相邻机组间距的不同相关。三种尾流工况下，近尾流区的尾流深度明显较远尾流区大，尾流速度亏损明显。关键词：海上风电场；扫描雷达；尾流特性；尾流工况0引言随着全球范围内风电开发利用技术的不断进步，中国海上风电规模越来越大。而在“平价”市场条件下，海上风电开发面临着严峻挑战，发电量是影响风电场经济收益的重要指标之一。海上风能资源分布较均匀，风电机组的排布在空间上一般呈现较为规则的几何形态[1-2]，多台、多排风机尾流相互叠加影响、风速恢复缓慢，导致尾流损失加重。目前对风电机组或风...
