Coordination control device, method and system for intelligent soft switch and wind turbine generator

The invention discloses a coordinated control device, method and system for an intelligent soft switch and a wind turbine generator, and relates to the technical field of flexible interconnected power distribution networks. The intelligent soft start switch is connected with the flexible interconnection power distribution network through two feeder lines; the intelligent soft start switch comprises a voltage source type converter A and a voltage source type converter B, and further comprises a series connection line for connecting the voltage source type converter A and the voltage source type converter B in series. Through establishment of the two mass block models, a method for calculating the wind wheel rotating speed critical value is provided, a method for obtaining the maximum active power supporting capacity of the permanent magnet direct-driven wind turbine generator is provided, and stalling shutdown of the permanent magnet direct-driven wind turbine generator caused by excessive extraction of wind w