A method for determining the roughness value of existing wind farms based on the data of double wind measuring towers

Abstract

The invention discloses an existing wind power plant roughness value determination method based on data of double anemometer towers. The method includes: step 1, collecting the data of the double anemometer towers from an existing wind power plant or close regions thereof; step 2, grouping the data; step 3, respectively checking and processing each group of data; step 4, preliminarily drawing a roughness line; step 5, adopting a 'double-tower method' for determining a roughness value of each local area; step 6, judging whether the existing wind power plant is put into operation or not, if not, finishing roughness value determination, and if yes, starting the step 7; step 7, detailing the roughness line of the existing wind power plant; step 8, establishing a roughness value calculation expression of the existing wind power plant in a later phase of production; step 9, adopting the 'double-tower method' for determining the regional roughness value of the existing wind power plant. The existing wind power plant roughness value determination method fills the gap in regional roughness value setup methods for the existing wind power plant at the present stage and can be applied to wind energy resource assessment of close wind power plants in existence of the existing wind power plant in future.

Description

technical field [0001] The invention relates to a method for determining the roughness value of an existing wind farm based on the data of double wind measuring towers, and belongs to the field of wind energy evaluation of wind farms with flat terrain. Background technique [0002] Most of my country's coastal areas have the advantages of flat terrain, rich wind energy resources, convenient transportation, and good construction conditions, which are ideal areas for wind farm construction. However, with the rapid development of my country's wind power industry, the availability of land resources in coastal areas is becoming more and more limited, and the phenomenon of existing wind farms around proposed wind farms is becoming more and more prominent. [0003] In the early development of coastal wind farms, most of the existing wind farms near the planned wind farms are still in the planning or construction stage. At this time, the wind turbines have not yet been put into oper...

AI Technical Summary

Problems solved by technology

However, in recent years, the number of existing wind farms in the stage of completion and commissioning has increased. At this time, the existing wind farms after commissioning are equivalent to emerging obstacles on the original landform, which will cause a certain degree of sudden decrease in wind speed in the downstream area. Then the phenomenon of gradual recovery

However, the roughness value standard of the existing wind farm area after it is put into operation is not given in the existing roughness length value determination table, and the method of relying on table lookup is no longer applicable. almost no

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