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A wind farm wake flow calculation method and system based on multiple physical models

A calculation method and technology for wind farms, applied in calculation, computer-aided design, design optimization/simulation, etc., and can solve problems such as inconvenience

Active Publication Date: 2019-01-11
GUODIAN UNITED POWER TECH
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  • Application Information

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Problems solved by technology

[0004] It can be seen that the above-mentioned existing wind farm wake calculation method obviously still has inconvenience and defects, and needs to be further improved.

Method used

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  • A wind farm wake flow calculation method and system based on multiple physical models
  • A wind farm wake flow calculation method and system based on multiple physical models
  • A wind farm wake flow calculation method and system based on multiple physical models

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Embodiment Construction

[0054] Cooperate image 3 As shown, the multi-physics model-based wind farm wake calculation method in this embodiment includes the following steps:

[0055] Step 1: Establish the regional grid of the wind farm: According to the terrain contour data and roughness data in the wind farm and its surrounding area, establish a 3D solid model of the contour data and roughness data, and determine the air flow field area above the wind farm And establish the grid of the flow field area, the result is as follows figure 1 shown.

[0056] Step 2: According to the regional grid of the wind farm and the wind measurement data of the wind measuring tower in step 1, solve the Larsen wake model and the CFD wake model based on the Reynolds average Navier-Stokes equation to obtain the wind speed of the wake flow field. It is necessary to clean the wind measurement data at the wind measurement tower, and calculate the corresponding data at the wind turbine location according to the statistical wi...

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Abstract

The invention discloses a wind farm wake flow calculation method and system based on multiple physical models. The method comprises the following steps: (1) establishing a three-dimensional solid model of grid wind farm topographic contour data; (2) solving the Larsen wake flow model and the CFD wake flow model based on the Reynolds average Navier-Stokes equation, and obtaining the wind speed VLarsen and VCFD of a wake flow field; (3) calculating the terrain complexity RIX value at the fan position; (4) according to the terrain complexity RIX, selecting and fusing the two models. A RIX reference quantity of terrain complexity is added in the calculation process of the wind farm wake flow, and the selection and fusion of the wake flow model are carried out according to the terrain complexity, the calculation accuracy and the calculation energy consumption are taken into consideration, the calculation speed is ensured, and the wake flow area is more in conformity with the real flow fieldat the same time.

Description

technical field [0001] The invention relates to the field of optimal control of wind farms, in particular to a multi-physics model-based wake calculation method and system for wind farms. Background technique [0002] In a wind farm, the airflow blows through the fan blades to drive the fan to rotate. Due to the rotation of the fan and the blocking effect of the blades on the airflow, a wake effect is generated in the downwind direction of the fan. In the wake area, it not only reduces the wind speed and reduces the utilization rate of wind resources, but also the turbulent and eddy currents will affect the service life of the downstream units. Therefore, it is necessary to carefully consider in the early stage of wind farm planning, carefully control the layout of machine positions, ensure the safety of the unit, and maximize the overall economic benefits of the wind farm. [0003] There are usually two methods for studying the wake effect of fans. One is the Park, Jansen...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F2119/06G06F30/20
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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