A variable-rate feathering shutdown control method for wind turbines

Abstract

The invention discloses a variable-rate feathering shutdown control method for a wind turbine generator set. According to the method, a Beidou positioning system is mainly utilized to monitor the posture of the generator set in real time, the displacement of the engine room movement is acquired in real time, the state of the load borne by the generator set is estimated according to the displacement condition of an engine room, and then the impact load of a tower can be effectively reduced during the shutdown of the generator set through variable-rate feathering shutdown control strategies under different displacements according to the analyzed load condition, so that the generator set is enabled to carry out more stably feathering shutdown, the service life of the generator set is prolonged, and the variable-rate feathering shutdown control method has practical popularization value and is worthy of popularization.

Description

technical field [0001] The present invention relates to the technical field of wind power generation control, in particular to a variable-speed feathering shutdown control method of a wind power generating set. Background technique [0002] As is known in the industry, when a wind turbine fails, there are two types of feathering shutdown methods: [0003] ①. The main control system controls the feathering rate, and sends the feathering position command to the actuator of the pitch control system until the feathering shutdown process is completed. The feathering rate can be set arbitrarily according to the control strategy. [0004] ②. The feathering process is automatically completed by the pitch actuator. The feathering rate is set by the internal parameters of the pitch. The feathering position command of the main control is not accepted, and the main control cannot implement the corresponding variable rate control strategy. Set one rate for feathering shutdown, or severa...

AI Technical Summary

Problems solved by technology

[0005] In the main control feathering mode ①, there is a variable speed feathering shutdown according to the positive and negative directions of the generator acceleration; there is a variable speed feathering shutdown according to the wind speed; there is also a variable speed suitable for the single blade blade jamming condition Feather down at a certain rate; these methods can reduce the load during shutdown to a certain extent, but lack real-time monitoring of the state of the unit during shutdown

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