Optimization processing method and device for calculation scale of complete machine simulation model of wind turbine generator

The invention belongs to the technical field of wind turbine generator structure modeling simulation, and particularly relates to a wind turbine generator whole machine simulation model calculation scale optimization processing method and a wind turbine generator whole machine simulation model calculation scale optimization processing device. Determining two degrees of freedom with the farthest distance in the complete machine structure dynamic model of the wind turbine generator, wherein the two degrees of freedom with the farthest distance are two starting points; constructing a target expansion tree by using the two starting points; and renumbering each degree of freedom in the overall structure dynamic model of the wind turbine generator based on the hierarchy of each degree of freedom in the target expansion tree. According to the technical scheme provided by the invention, the degree-of-freedom numbers of the whole machine structure dynamic model of the wind turbine generator are reordered, so that the