Method for preventing wind generating set from runaway

A technology for wind turbines and flying cars, which is applied in the control of wind turbines, wind turbines, wind energy power generation and other directions to achieve the effects of avoiding wind turbines flying, improving reliability and high efficiency

Active Publication Date: 2014-12-03
CRRC WIND POWER(SHANDONG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Any of the above-mentioned reasons will cause feathering failure and lead to speeding accidents, resulting in heavy losses. At

Method used

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Embodiment Construction

[0014] The present invention proposes a method for preventing wind turbines from flying, which can control the wind turbine to yaw 90 degrees in the crosswind when the wind turbine pitch system fails, so as to achieve the minimum wind energy absorbed by the wind rotor, so that the speed of the wind rotor can drop rapidly. After the fan pitch fails, the fan is protected from damage to the greatest extent. Prevent major accidents caused by fan speeding.

[0015] Specifically include the following steps:

[0016] Step 1. After the main control system sends out the pitch change command and exceeds the set time, check whether the pitch system can track in real time. If not, for example, if the main control system sends out a pitch change command, the tracking error of the pitch system exceeds 3° for 1 second. Case. And if the rotational speed of the wind rotor exceeds the set value, it is determined that the pitch system is invalid. The pitch system of the variable-pitch wind tu...

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Abstract

The invention provides a method for preventing a wind generating set from runaway. After a fan master control system sends a variable pitch instruction for certain time, a pitch control system cannot be tracked in real time and is considered as failure when the rotating speed of a wind wheel exceeds a given value. According to the method, under the condition that the pitch control system of the fan fails, the fan is controlled to yaw for 90-degree crosswind, accordingly, the wind energy absorption of the wind wheel is maximum, the rotating speed of the wind wheel is rapidly reduced, and the fan can be protected from being damaged to the greatest extend after failure of variable pitch of the fan.

Description

technical field [0001] The invention relates to a method for preventing a wind power generating set from flying, which is suitable for a wind generating set with three blades, variable pitch, upwind direction and active yaw. Background technique [0002] At present, the main braking system of wind turbines is aerodynamic brakes. The variable pitch wind turbines adjust the blade pitch angle to 90° through the pitch system. The entire blade forms a damping plate, and the airflow does not affect the blade. Torque, so that the speed of the wind rotor is reduced to act as a brake. The main reason for the speeding is that the blades cannot be feathered to 90° when the wind rotor is overspeeding. As the wind speed increases, the wind rotor turns faster and faster, eventually causing an accident. The pitch control mechanisms of wind turbines include hydraulic pitch control and electric pitch control. The failure causes of the hydraulic system are mainly: power plant failure, contro...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 王建维张海华赵磊关中杰
Owner CRRC WIND POWER(SHANDONG) CO LTD
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