Method for correcting wind directions of wind data based on azimuth deflection method

Abstract

The invention discloses a method for correcting wind directions of wind data based on an azimuth deflection method. The method is characterized in that the original point of a rectangular coordinate system is taken as the center, the monthly wind roses of X year of a long-term weather bench-mark station C of a wind power plant or an air-cooled power plant are entirely deflected by j angle units clockwise one by one, wherein j is equal to 0, 1,..., 15; the deflected wind roses are compared with the monthly wind roses of each year of D year and Yi year, wherein I is equal to 1, 2,..., 10; a difference index corresponding to each deflection angle is calculated, and then the most similar corresponding optimal deflection angle delta of each corresponding wind rose is obtained. The method provides a basis for correcting hourly wind directions of a measured year in an engineering site into the hourly wind directions of a year to be figured out, and can be applied to wind direction correction under the circumstance of long distance between the long-term weather bench-mark stations and engineering sites such as offshore or in-the-sea wind power plants and air-cooled power plants.

Description

technical field [0001] The invention relates to a method for correcting wind direction of wind measurement data, and belongs to the technical field of wind energy resource assessment of wind farms and meteorological assessment of air-cooled power plants. Background technique [0002] According to the current national and industry standards, National Energy Foundation and Management Standardization Technical Committee. GB / T18710-2002 Wind Energy Resource Assessment Method for Wind Farms [S]. Beijing: China Electric Power Press, 2002. National Energy Administration of the People's Republic of China. DL / T5158—2012 Power Engineering Meteorological Survey Technical Regulations [S]. Beijing: China Planning Press, 2012. In the design process of wind farms and air-cooled power plants, it is necessary to establish a certain quantitative relationship based on the measured wind speed and wind direction data of the project site and the long-term meteorological reference station in the s...

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Problems solved by technology

If the annual wind direction is replaced by the annual wind direction data measured at the plant site, that is, the hourly wind direction of the plant site in the past 10 years is the same, and the wind vector data of the past 10 years are formed together with the hourly wind speed, and such data should be used Statistics of air-cooled meteorological parameters, the results may be quite different from the actual

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