Shutdown control method and device for wind power generating set

Abstract

The invention provides a shutdown control method and device for a wind power generator set. The shutdown control method includes the steps that when the wind power generator set is switched from a power generation state to a shutdown state, a first torque reducing coefficient value is determined according to a current first torque set value of the wind power generator set; a torque reference valueis determined according to the current rotating speed and the current first torque set value; a second torque set value is determined according to the first torque reducing coefficient value and thetorque reference value, and torque control operation is executed on a power generator based on the second torque set value; the first torque reducing coefficient value is a specific value of the current first torque set value to a rated torque value; and the torque reference value is the specific value of the current first torque set value to the first torque reducing coefficient value or the rated torque value. By means of the shutdown control method and device for the wind power generator set, torque jump of the wind power generator set in the shutdown process can be avoided, so that the shutdown process is smoother and more stable.

Description

technical field [0001] The present invention generally relates to the technical field of wind power, and more specifically, relates to a method and device for controlling shutdown of a wind power generating set. Background technique [0002] Existing wind turbines trigger rapid shutdown when they are fully powered, and usually use a torque lookup table to dynamically adjust the torque during shutdown, such as figure 1 as shown, figure 1 It shows the torque look-up table curve under the rated power used by the existing wind power generating set in the shutdown process, that is, the corresponding torque is obtained according to the real-time generator speed look-up table, and the torque control of the generator is performed based on the torque. [0003] However, when the wind turbine triggers a rapid shutdown in the state of dissatisfaction (for example, dissatisfaction caused by low wind speed or dissatisfaction caused by power-limited operation), the torque is adjusted by u...

AI Technical Summary

Problems solved by technology

Therefore, the existing mode of dynamically adjusting the torque needs to be improved urgently

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