A low wind speed wind farm wind turbine roughness and wind resource analysis and calculation method

Abstract

The invention discloses a method for analyzing and calculating the roughness of wind turbines in a low-wind-speed wind farm and wind resources. Step 1: According to the relative positions of the built wind farm and the planned wind farm, the degree of influence of the built wind farm on the planned wind farm is judged; Step 2. Judging the uniform distribution of wind turbines in the built wind farm, proceed to step 3; Step 3. According to the judgment results of steps 1 and 2, calculate the average occupied area A of wind turbines for each roughness unit H Ratio to the windward area S, for each roughness unit, when the ratio is greater than the set value Q, use step 4 to calculate the roughness; step 4, calculate the roughness z of the built wind farm for each roughness unit 0 . The theoretical basis is sufficient, which can avoid errors caused by human estimation, ensure the smooth progress of subsequent wind resource analysis, and greatly improve work efficiency; by simplifying the surrounding wind farms to a certain range of roughness settings, the operation is simple and can provide engineering projects with refer to.

Description

technical field [0001] The invention relates to a method for analyzing and calculating the roughness of a wind power unit in a low wind speed wind farm and wind resources. Background technique [0002] When planning a wind farm, the surrounding wind farms have a certain impact on its power generation. How to effectively evaluate the impact of the built wind farms on the planned wind farm is very important. The wind turbines in the built wind farms are similar to the vegetation and houses in the topography, and the vegetation and houses are usually not modeled in the actual topographic map production. Therefore, the roughness must be set in the topographic map file to consider its impact on The impact of wind farm power generation. In the same way, wind turbines in existing wind farms can also be considered accordingly. [0003] The value of the roughness of the built wind farm is related to its position, the distance between the wind turbines, the height of the hub of the ...

AI Technical Summary

Problems solved by technology

However, in actual engineering, the investment subjects of the planned wind farm and the surrounding wind farms may be different, and it is difficult to obtain the coordinates of the surrounding wind turbines; in addition, there may be multiple built wind farms around the planned wind farm, and the Each built wind turbine has a large amount of modeling work

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