CFD and improved PSO based microscopic wind-farm site selection method of complex terrain

A complex terrain and micro-site selection technology, applied in the fields of instruments, data processing applications, prediction, etc., can solve the problems of less research, achieve layout optimization, maintain high efficiency, and increase population diversity.

Inactive Publication Date: 2014-08-20
HOHAI UNIV
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Problems solved by technology

The wind energy distribution of the wind farm can be obtained by numerical calculation of the wind farm through CFD, and then the micro-site selection of the wind farm can be optimized to improve the wind energy utilization efficiency of the wind farm, but there are still relatively few studies in this area.

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  • CFD and improved PSO based microscopic wind-farm site selection method of complex terrain
  • CFD and improved PSO based microscopic wind-farm site selection method of complex terrain
  • CFD and improved PSO based microscopic wind-farm site selection method of complex terrain

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0037] (1) Numerical simulation of complex terrain wind farms using CFD

[0038] 1.1 Terrain digitization and grid generation

[0039] At present, topographic maps of wind farms are usually represented by Autocad contour lines. To establish a CFD physical model including terrain, the terrain needs to be digitized first. ArcGIS is the most powerful and widely used software in the geographic information system industry. Use Arcgis to separate the contour lines in Autocad and generate a tin file, then convert the generated tin file into a dem file of coordinate points, and perform discrete processing on the dem file, and finally generate the Cartesian coordinates of the topographic map.

[0040] The selected topographic map plane is a standard rectangle, and the height direction is taken to be 5 times the hub height above the average height. According to the disc...

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Abstract

The invention discloses a CFD and improved PSO based microscopic wind-farm site selection method of a complex terrain, belonging to the technical field of microscopic wind-farm site selection. The method comprises the steps of simulating values of wind farms of the complex terrain via CFD to obtain wind resource distribution, extracting a CFD value simulating result corresponding to a position at the hub height of a wind generating set, establishing a wake model, a wind farm model and a target function, solving a particle swarm speed and position updating equation by utilizing the improved PSO which is combined with niche technology, chaotic mutation and punishment, and solving the target function in an iterative manner by combining the wake model to generate an optimal distribution result. According to the method, the CFD value simulating result is applied to optimizing microscopic site selection for wind farms in the complex terrain, influence of wind energy distribution and wake is fully considered, and layout of the wind farms is optimized; and the whole convergence process is highly efficient due to improvement of population diversity, chaotic mutation of particles and change of moving dimensions of populations.

Description

technical field [0001] The invention discloses a method for microcosmic site selection of wind farms with complex terrain based on CFD and improved PSO, and belongs to the technical field of microcosmic site selection for wind farms. Background technique [0002] For the micro-site selection of complex terrain, the Lissaman linear model based on height change is often used. The wind speed is determined by the height of the location and changes exponentially. WAsP software is based on such a model. Under flat terrain conditions, WAsP software can accurately predict the distribution of wind energy, but under complex terrain conditions, the wind energy distribution calculated by WAsP software has a large error compared with the actual one. It is due to the fact that under complex terrain conditions, the airflow on the windward slope is lifted, the pressure is increased, and backflow may occur; on the leeward slope, due to the influence of negative pressure, the airflow will be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCY04S10/545Y02E40/76Y02E40/70Y04S10/50
Inventor 许昌杨建川李辰奇郭苏韩星星王欣刘德有郑源
Owner HOHAI UNIV
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