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A method, system, device and storage medium for controlling the pitch angle of a wind turbine

A technology of wind turbines and control methods, applied in the control of wind turbines, mechanical equipment, wind turbines, etc., can solve problems such as loss of power generation, achieve the effect of increasing the fixed slope and avoiding sudden changes in aerodynamic force

Active Publication Date: 2022-02-11
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the above method only relies on the output power of the wind turbine as the judgment condition, although the pitch change action can be performed in advance under the condition of drastic changes in wind speed and wind direction, the pitch change action will also be performed under normal power generation conditions, resulting in loss of power generation

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  • A method, system, device and storage medium for controlling the pitch angle of a wind turbine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A pitch angle control method for extreme wind direction changes such as figure 1 As shown, the wind speed of the anemometer is detected in the current detection cycle. Due to factors such as the measurement device and the rotation of the wind wheel, the measured wind speed cannot directly participate in the control. Therefore, a 10-second sliding average is performed on the wind speed measured by the anemometer. Compare it with the preset wind speed threshold, if the threshold is not exceeded, the operating status of the unit will not change. The judging condition set here is that this method will be used only if the wind speed is greater than the set wind speed, so as to avoid the loss of power generation caused by the pitch angle action caused by frequent rapid wind direction changes under small wind. If the wind speed measured by the 10-second moving average anemometer exceeds the preset wind speed threshold, the wind direction of the anemometer is detected in the cu...

Embodiment 2

[0045] A pitch angle control method for extreme wind direction changes, comprising the steps of:

[0046] Detect the current anemometer to measure the wind speed, and transmit the measurement signal to the PLC controller.

[0047] Since the wind speed measured by the anemometer presents irregular real-time fluctuations, it is not suitable to directly participate in the control algorithm.

[0048] Perform a 15-second sliding average on the currently measured wind speed of the anemometer to obtain the wind speed of the anemometer after the current 15-second sliding average.

[0049] Get the set wind speed threshold.

[0050] Determine whether the wind speed of the anemometer after the current 15-second sliding average is greater than the set wind speed threshold.

[0051] If the wind speed of the anemometer after the current 15-second sliding average is lower than the set wind speed threshold, the unit is running normally without any additional control actions.

[0052] If th...

Embodiment 3

[0071] A pitch angle control system for extreme wind conditions, comprising:

[0072] The wind speed acquisition module is used to obtain the real-time measured wind speed of the wind turbine;

[0073] The wind direction acquisition module is used to obtain the real-time measured wind direction of the wind turbine;

[0074] The data processing module is used to receive the data transmitted by the wind speed acquisition module and the wind direction acquisition module, and process the data to obtain the real-time wind direction deviation threshold;

[0075] The judging module is used to receive the data from the data processing module and judge whether it is necessary to adjust the minimum pitch angle of the wind turbine.

[0076] The judging module includes a wind speed judging unit, a wind direction judging unit and a wind direction deviation judging unit;

[0077] Wind speed judgment unit: when the real-time measured wind speed is less than or equal to the wind speed thres...

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Abstract

The invention discloses a control method, system, equipment and storage medium for the pitch angle of a wind turbine, belonging to the field of wind power generation. The wind direction is measured by detecting the wind direction meter and compared with a preset threshold to determine whether an extreme wind direction change has been encountered, and through scheduling Minimum pitch angle to cope with extreme loads caused by rapid changes in wind direction. The positive and negative direction of the wind direction measured by the anemometer is used as a judgment. Since increasing the minimum pitch angle when the negative wind direction is coming, the load experienced by the large components of the unit will be greater than that of the positive wind direction, so only increase the minimum pitch angle for the positive wind direction. Control of the distance from the angle to reduce the ultimate load. Compared with the control method that does not distinguish the wind direction, it further reduces the ultimate load brought by the unit when the extreme wind direction changes. Using the method of judging the wind speed threshold, the current measured wind speed exceeds the threshold as the primary condition, to avoid the problem of generating loss caused by increasing the pitch angle due to the small wind speed but not yet impacting the bending moment of the unit.

Description

technical field [0001] The invention belongs to the field of wind power generation, and relates to a control method, system, equipment and storage medium for the pitch angle of a wind turbine. Background technique [0002] In the international electrical standard IEC61400-13 wind turbine design, it is stipulated that the wind turbine experiences EDC (extreme gale with direction change) superimposed with ECD (extreme continuous gust with direction change), and the wind speed and direction are drastically changed. In this case Key components such as the yaw bearing of the unit are subject to large bending moments and may experience extreme loads. Therefore, it is necessary to adjust the unit operation control strategy so that the unit load can be reduced as much as possible under extreme wind conditions such as severe wind direction and wind speed changes. [0003] Aiming at the above problems, the prior art proposes solutions, including: when the wind turbine is operating no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/04F03D7/06
CPCF03D7/042F03D7/06Y02E10/74
Inventor 金强蔡安民林伟荣
Owner HUANENG CLEAN ENERGY RES INST
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