Offshore wind plant generating capacity calculation method, calculation system and calculation terminal

The invention provides an offshore wind plant generating capacity calculation method, system and terminal, and relates to the technical field of offshore wind power generation. Sea wave data and wind resource data of a preset time sequence are obtained; a TY01 scheme is adopted to calculate the relation between the sea surface roughness and sea waves, and time sequence sea surface roughness data are obtained; dividing the time sequence sea surface roughness data into n classes according to the size; dividing the atmospheric stability into six classes by adopting a temperature gradient method; combining n types of time sequence sea surface roughness and six types of atmospheric stability combinations to form 6 * n atmospheric stability-roughness combinations; constructing a CFD flow field model; calculating power data of the time sequence segment; and performing integration statistical calculation to obtain the generating capacity of each wind turbine generator of the offshore wind plant, and obtaining the gen