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Anti-galloping protector and propeller changing control system

A protection device and control system technology, which is applied in the control of wind turbines, wind energy power generation, wind turbines, etc., can solve the problems of too long signal transmission paths, many fault points, and low safety and reliability of the speed limit protection device, so as to achieve safety The effect of high protection level, convenient installation and maintenance, and simple principle

Inactive Publication Date: 2012-01-04
ZHEJIANG ZHONGKE AUTOMATION ENG TECH
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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

Method used

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  • Anti-galloping protector and propeller changing control system
  • Anti-galloping protector and propeller changing control system
  • Anti-galloping protector and propeller changing control system

Examples

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Embodiment

[0021] Example: such as figure 1 As shown, an anti-running protection device of the present invention includes an acceleration switch 7, the acceleration switch 7 is installed on the base 8, the base 8 is installed on the wind wheel hub 10 through the screw 9, and the acceleration switch 7 is in the wind The inner diameter of the wheel hub 10 is the largest.

[0022] like figure 2 As shown, the acceleration switch is composed of an acceleration sensor, a signal conversion module and a speed detection control module connected in sequence, and the speed detection control module is connected to the EFC input terminal of the motor driver in the pitch control system; the acceleration The switch rotates with the wind wheel to detect the speed of the wind wheel in real time, and controls the opening and closing of the contacts according to the comparison result with the set value.

[0023] Specifically, the acceleration sensor is used to measure the rotational angular acceleration...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 叶太顺戚义双
Owner ZHEJIANG ZHONGKE AUTOMATION ENG TECH
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