Wind turbine generator protection method after blade damage and related assembly

The invention discloses a method for protecting a wind turbine generator after blades are damaged and related components, and relates to the field of wind power protection. By detecting parameters related to blade damage in real time, when it is detected that the blades are damaged, the pitch angle of each blade is adjusted to the feathering angle at a certain rate, and meanwhile, the torque of the generator is reduced at a certain rate curve; the rotating speed of a wind wheel of the wind turbine generator is gradually reduced, after the wind wheel approximately stops rotating and all the blades are at the feathering angle, the generator is turned off, and when the wind turbine generator is in a balanced state, a transmission shaft and the wind wheel of the wind turbine generator are locked, and shutdown protection is completed. The rotating speed of the wind wheel is reduced by reducing the torque of the generator and adjusting the feathering angle after the blades are detected to be damaged, so that the ge