Method for recognizing yawing-caused wind misalignment of wind driven generator

A wind turbine and yaw technology, which is applied in the monitoring of wind turbines, wind turbines, engines, etc., can solve problems such as the decline of theoretical value reference, inaccurate results, etc., to avoid loss of power generation, stable characteristic performance, Convincing results

Active Publication Date: 2019-08-06
CYBERINSIGHT TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

Similarly, due to measurement problems, the referenceability of theoretical values ​​is reduced, and this method only uses the current detected yaw angle as the comparison object, which is more easily affected by measurement errors and singular values, and leads to inaccurate results

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  • Method for recognizing yawing-caused wind misalignment of wind driven generator

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Embodiment

[0041] The following describes the method for identifying wind turbine yaw alignment of the present application through an embodiment, and its specific implementation steps include the following steps:

[0042] (1) Obtain the monitoring data of the equipment sensor;

[0043] (2) Preprocess the data, and delete the data when the equipment is in abnormal operating states such as failure, maintenance, and power cut according to the fan status identification in the data; for data without fan status identification variables, you can choose the blade angle less than 5 angle data. The fan controls the speed through the blade angle to achieve shutdown or power limitation. Usually, when the fan is stopped or power is limited, the blade angle is less than 5 degrees.

[0044] (3) Calculate the value range of the wind angle data, and judge whether the maximum value exceeds 180 degrees. For the variable whose maximum value exceeds 180 degrees, subtract 360 degrees from the data greater t...

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Abstract

The invention relates to a method for recognizing yawing-caused wind misalignment of a wind driven generator. The method comprises the steps that operating data of a wind generating set are acquired;the data are pre-processed to remove data in a non-operating state from the operating data; an iterative counter is initialized, and initial parameters are set; the wind speed of each wind box is processed, and the maximum wind power utilization index of each wind box under different wind alignment angles is calculated; whether the dispersion of the maximum wind power utilization index of all thewind boxes obtained by calculation meets requirements or not is judged, envelope wind alignment angle-wind power utilization index scatter diagram curves are fit, and the wind alignment value corresponding to a point having the maximum wind power utilization index is calculated according to the curves; morphological characteristics of the fit curves are judged, and only curves meeting index requirements are reserved; and deviation angles and reliability indexes of all the envelop curves meeting the index requirements are calculated, and the reliability of a result is judged. By adoption of themethod, more stable characteristic expressions and more accurate results can be obtained to guide filed operation and maintenance, and power generation losses are avoided.

Description

technical field [0001] The present application relates to a method for identifying wind turbine yaw misalignment, which is applicable to the technical field of wind power generation. Background technique [0002] Yawing against the wind is not exactly a common phenomenon in wind turbines. Due to uncalibrated wind vane installation, loose or stuck wind vane, increased measurement error of wind vane with use, and failure of yaw system control, etc., there is a deviation between the actual angle of the blade facing the wind and the angle against the wind, resulting in loss of power generation. Most of the methods using operating data to solve this problem are based on the assumption that the maximum wind energy obtained by the wind turbine should be around 0 degrees on the windward angle under normal conditions. [0003] The method used in the prior art to identify the problem of yaw and wind deviation and calculate the wind deviation angle includes calculating the wind angle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D17/00G06F17/50
CPCF03D17/00G06F30/20
Inventor 谢鹏金超文静史喆李杰
Owner CYBERINSIGHT TECH CO LTD
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