风电场局部复杂地形风资源工程实例分析

Analysis of wind resources in local complicated terrain of wind farmbased on engineering examples

为了提高项目效益或减少项目损失,基于流场在不同地形影响下的表现,针对两个实际工程项目,采用不同模型对比分析了局部复杂地形下的风资源计算结果。结果表明:对于局部复杂地形,受不同地形的加速、屏障效应等影响,风流流场中不同位置流速不再与地形高程正相关,资源分析需综合考虑地形、测风塔、场址机位位置等因素;为了更为精确地建立流场计算模型、分析风资源情况并计算场区发电量,可通过改变模型计算区域大小、补充测风资料、完善地形图等方式进行优化。

In order to improve project benefits or reduce project losses,the calculation results of wind resources in local complex terrain were compared and analyzed using different models for two actual projects based on the performance of flow field influenced by different terrain.The results showed that due to the acceleration and barrier effect of different terrain,the velocity at different locations of the wind flow field of local complex terrain was no longer positively correlated with the terrain elevation.Terrain,wind tower,site location and other factors should be comprehensively considered for resource analysis.In order to establish the flow field calculation model,analyze the wind resources and calculate the power generation more accurately,it was suggested to change the size of the model calculation area,supplement the wind measurement data and improve the topographic map.