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Wind turbine pitch angle control method, device and system

A technology for a wind turbine and a control method, which is applied in the control of wind turbines, wind turbines, and wind power generation, etc., to achieve the effects of eliminating blade stall, improving power generation efficiency, and improving power curves.

Active Publication Date: 2018-03-23
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned analysis, the present invention aims to provide a control method, device and system for the pitch angle of a wind power generator set, which is used to solve the problem of increasing the rated speed of the wind power generator in the case of blade stall in the prior art, and the blade tip speed ratio The adverse effect on the safe operation ability of the unit caused by adjusting the output power in different ways

Method used

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  • Wind turbine pitch angle control method, device and system
  • Wind turbine pitch angle control method, device and system
  • Wind turbine pitch angle control method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] image 3 It is a flow chart of the control method for the pitch angle of the wind power generating set in Embodiment 1 of the present invention, such as image 3 As shown, it includes the following steps:

[0033] Step 310: Obtain the output power of the wind turbine in the transition period before full power;

[0034] Step 320: When the output power is abnormal, determine the pitch angle of the blade according to the pre-obtained maximum reference value of the wind direction angle when the blade stalls abnormally, the maximum reference value of the wind direction angle when the blade stalls normally, and the initial minimum pitch angle.

[0035] Among them, there are many ways to judge whether the output power is abnormal, for example, by comparing with the preset standard power threshold, or by comparing the output power curve of the transition section with the preset output power curve, or according to the output The relationship between power and wind speed is jud...

Embodiment 2

[0039] Figure 4 It is a flow chart of obtaining the maximum reference value of the wind direction angle in the second embodiment of the present invention. Such as Figure 4 As shown, it includes the following steps:

[0040] Step 410: collecting a plurality of wind angle values ​​and wind speed information within the first time period;

[0041] Step 420: Generate a wind speed-wind direction standard deviation scatter diagram according to the values ​​of multiple wind direction angles and the wind speed information;

[0042]Step 430: In the wind speed-wind direction standard deviation scatter diagram, generate a reference straight line perpendicular to the wind direction standard deviation axis, so that the data points within the preset range are located below the reference straight line, and according to the wind direction corresponding to the reference straight line The standard deviation value determines the maximum reference value of wind direction angle.

[0043] The ...

Embodiment 3

[0048] This example is for image 3 In step 320, a further detailed description is carried out. During specific implementation, the following methods can be adopted:

[0049] The sum of the maximum reference value of the wind direction angle when the blade stalls abnormally, the maximum reference value of the wind direction angle when the blade stalls normally, and the initial minimum pitch angle is rounded to determine the pitch angle of the blade; or,

[0050] The maximum reference value of the wind direction angle when the blade stalls abnormally, the maximum reference value of the wind direction angle when the blade stalls normally, and the initial minimum pitch angle are rounded and summed with the third value to determine The pitch angle of the blade.

[0051] Specifically, the above-mentioned rounding processing may include: rounding and rounding processing, upward rounding processing, or downward rounding processing.

[0052] Preferably, the pitch angle of the blade ...

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Abstract

The invention provides a pitch angel control method, device and system for a wind generating set. The method comprises the steps that output power of the wind generating set in a transition section before full power is obtained; and when the output power becomes abnormal, the pitch angle of blades is determined according to the maximum reference value, obtained in advance, of the wind angle when the blades are in stall abnormity, the maximum reference value of the wind angle when the blades are in stall normality and the initial minimum pitch angle. According to the technical scheme, under the condition that the fatigue load and the limit load of the unit are not increased, the power generating efficiency of the wind generating set in the life cycle is improved.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method, device and system for controlling the pitch angle of a wind power generator. Background technique [0002] Before the modern large-scale wind turbine is fully powered (that is, before the output power reaches the rated power), there are two operating areas. One, the generator has not yet reached the rated speed, and this area is called the maximum wind energy capture segment; When the rated speed is reached, but the output power has not yet reached the rated power, this area is called the transition section. Generally, the generator increases the power output by increasing the electromagnetic torque. Under the actual working conditions on site, the blades are prone to stall in the transition section, which leads to the reduction of the aerodynamic performance of the blades, reduces the absorption and utilization of wind energy by the blades, reduces the output of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 李健欧发顺
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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