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An emergency feathering control method for a wind power generating set

A kind of wind turbine, control method technology

Inactive Publication Date: 2019-06-18
CORONA WIND EQUIP BEIJING CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcomings of the prior art, and propose a control method for emergency feathering and variable speed shutdown of wind turbines, so as to solve the problem of excessive impact load through variable speed shutdown of wind turbines after emergency shutdown, thereby reducing The ultimate load of the wind turbine, thereby improving the safety and economy of the unit

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  • An emergency feathering control method for a wind power generating set
  • An emergency feathering control method for a wind power generating set
  • An emergency feathering control method for a wind power generating set

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] Such as Figure 1a As shown, the embodiment of the emergency feathering control method of the wind power generating set of the present invention comprises the following steps:

[0045] Step 1, determine the demarcation point of wind turbine variable speed shutdown;

[0046] Step 2, monitoring the status of the wind turbine system;

[0047] Step 3, determine the wind turbine pitch execution system mode, see the specific process Figure 1b ;

[0048] Step 4, the wind turbine pitches according to the variable speed stop mode adopted by the pitch actuator.

[0049] The variable speed stop demarcation point of the wind generating set in step 1 is determined according to the static load curve of the wind generating set, and the specific steps are as follows:

[0050] Step 1.1: The maximum wind speed V when the unit pitch angle is 0°

[0051...

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Abstract

Disclosed is an emergency feathering control method for a wind generating set. After emergency stopping of the wind generating set, variable rate stopping strategies are adopted. When emergency stopping is just started, feathering is conducted fast so as to reduce the forward load, and after the blade pitch angle reaches the limited angle or time reaches the limited time, the feathering speed needs to be decreased so as to reduce the negative direction load. The emergency feathering control method comprises the following steps that (1) the variable rate stopping demarcation point of the wind generating set is determined; (2) the system state of the wind generating set is monitored; (3) a variable blade execution system mode of the wind generating set is determined; and (4) the wind generating set conducts variable blade operation according to the variable rate stopping mode adopted by a variable blade execution mechanism.

Description

technical field [0001] The invention relates to an emergency feathering control method for a wind power generating set. Background technique [0002] When a megawatt-scale wind turbine is shut down in an emergency, it usually adopts the shutdown logic of directly disconnecting the inverter and feathering the propeller quickly, but this logic will cause the root of the blade and the bottom of the tower to bear a huge load impact, which is specified in DLC1 of the GL2010 specification. 5. In the DLC1.6 working condition, the bending moment in the blade root swinging direction and the bending moment in the front and rear direction of the tower bottom often have limit loads, and the longer the blade is, the more prominent the problem is. [0003] From the perspective of energy transfer, it is known from the brake disc-momentum theory that during normal power generation, the brake disc absorbs wind energy to reduce the wake velocity, the brake disc bears aerodynamic thrust, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCF03D7/00F05B2260/90F05B2270/107F05B2270/32Y02E10/72
Inventor 闫素芳徐浩张雷林资旭许洪华
Owner CORONA WIND EQUIP BEIJING CO LTD
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