A wind farm wake flow calculation method and system based on multiple physical models

The invention discloses a wind farm wake flow calculation method and system based on multiple physical models. The method comprises the following steps: (1) establishing a three-dimensional solid model of grid wind farm topographic contour data; (2) solving the Larsen wake flow model and the CFD wake flow model based on the Reynolds average Navier-Stokes equation, and obtaining the wind speed VLarsen and VCFD of a wake flow field; (3) calculating the terrain complexity RIX value at the fan position; (4) according to the terrain complexity RIX, selecting and fusing the two models. A RIX reference quantity of terrain complexity is added in the calculation process of the wind farm wake flow, and the selection and fusion of the wake flow model are carried out according to the terrain complexity, the calculation accuracy and the calculation energy consumption are taken into consideration, the calculation speed is ensured, and the wake flow area is more in conformity with the real flow fieldat the same time. 本发明公开了