Anti-galloping protector and propeller changing control system

Abstract

The invention discloses an anti-galloping protector and a propeller-changing control system. The anti-galloping protector comprises an acceleration switch, wherein the acceleration switch is arranged on a wind wheel hub and composed of an acceleration sensor, a signal conversion module and a speed detecting control module which are successively connected; the speed detecting control module is connected with an EFC (emergency feathering command) input terminal of a motor driver in the propeller-changing control system. According to the invention, an anti-galloping protector is added to the original propeller-changing control system, and the set value of wind wheel rotation speed of the anti-galloping protector is required to be greater than the that of the original system; when the speed limiting device of the original system fails the emergency feathering function cannot be executed, and safe feathering cannot be realized; therefore, the wind wheel rotation speed is increased continuously; and when the wind wheel rotation speed reaches the set value of the acceleration switch, the contact of the acceleration switch is off, a safety chain EFC signal is triggered, and the motor driver directly drives propeller changing motors to execute the emergency feathering function respectively so as to realize safe braking of the entire machine.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an anti-runaway protection device and a pitch control system. Background technique [0002] In recent years, wind farms around the world have frequently seen wind turbines collapsing due to speeding, causing catastrophic losses. The main reason for the speeding of the wind turbine is that the speed of the wind rotor is too high, which seriously exceeds its designed speed and exceeds the load borne by the wind turbine, causing the wind turbine to collapse. The reason for the high speed of the wind rotor is that the pitch control system is out of control, and the emergency feathering function cannot be performed to achieve a safe shutdown. [0003] At present, the speed limit protection method applied to the pitch control system of wind turbines is mainly to change the pitch angle of the blades by detecting the rotation speed of the generator, thereby controlling the...

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes the shortcomings of the existing speed limit protection device of wind power generators, such as too long signal transmission path, many fault points, and relatively low safety and reliability, and provides an anti-coasting vehicle with simple principle, convenient installation and maintenance, and high safety and reliability Protection device and pitch control system

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