A wind farm wake correction method and system based on CFD fluid mechanics model

A fluid mechanics, wind farm technology, applied in the field of wind farm optimization control, can solve problems such as inconvenience

Active Publication Date: 2018-12-25
GUODIAN UNITED POWER TECH
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Problems solved by technology

[0004] It can be seen that the above-mentioned existing wind farm wake calculation m

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  • A wind farm wake correction method and system based on CFD fluid mechanics model
  • A wind farm wake correction method and system based on CFD fluid mechanics model
  • A wind farm wake correction method and system based on CFD fluid mechanics model

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Embodiment Construction

[0036] In the wake area, the spacing between different wind turbines, the terrain characteristics of the wind farm, and the wind characteristics will all affect the wake assessment. Therefore, it is necessary to accurately assess the wind turbines affected by the wake.

[0037] This embodiment provides a wind farm wake correction method based on the CFD fluid dynamics model, and the wind farm is set to be divided into θ° as a wind direction sector (taking θ°=30° as an example, then divided into 12 wind directions sectors, such as taking θ°=45° as an example, it is divided into 8 sectors), on the basis of the above-mentioned wind direction sector division, the wind direction rotation model is used to calculate the wake flow field, which can be used to calculate the wind turbine (fan ) between wake effects.

[0038] refer to Figure 4 As shown, it includes the following steps:

[0039] S101, according to the main wind direction data of the wind farm wind measuring tower, estab...

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Abstract

The invention discloses a wind farm wake correction method and system based on a CFD fluid mechanics model. The wind farm is divided into sectors with theta degree as one wind direction, and the windfield wake flow field is calculated by using the wind direction rotation model, which includes: according to the wind direction data of the wind measuring tower, the numerical simulation model extending along the X-axis direction according to the wind direction is established, and the grid three-dimensional solid model of the wind farm topography is established; based on the CFD wake model of theReynolds mean Nav i er-Stokes equation, the wake field in the main wind direction sector is obtained; by deflecting the terrain coordinates, the wake flow fields in other sectors with different wind directions are calculated; the wake flow fields are weighted by the wind frequencies in different wind direction sectors, and the final wake flow fields are obtained, which are used to calculate the wake effects between wind turbines. By adding topographic coordinate deflection, the invention adapts to numerical simulation of CFD fluid mechanics wake model with different wind direction angles, andat the same time, the wind frequency of each wind direction is considered for weighting, so that the wake region is more consistent with the real flow field.

Description

technical field [0001] The invention relates to the field of optimal control of wind farms, in particular to a method and system for correcting wake flow of wind farms based on a CFD fluid dynamics model. Background technique [0002] The proportion of wind power generation in the power system continues to increase, and large wind farms usually consist of hundreds or even thousands of wind turbines. The wake of the wind turbine in the wind farm has a great influence on the downstream wind turbine, and the calculation of the wake of the wind turbine has attracted more and more attention. In the wake area, the spacing between different wind turbines, the terrain characteristics of the wind farm, and the wind characteristics will all affect the wake assessment. Therefore, it is necessary to accurately assess the wind turbines affected by the wake. [0003] There are usually two methods for studying the wake effect of wind turbines. One is the Park, Jansen and other wake model...

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Application Information

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IPC IPC(8): G06F17/50G06T17/00
CPCG06T17/00G06F2111/10G06F30/20Y02B10/30
Inventor 袁凌褚景春潘磊董健李润祥张亦澄尹铁男牟金磊袁飞赵斌罗方正杨帆
Owner GUODIAN UNITED POWER TECH
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