A Wind Resource Grid Division Method Based on Wind Direction Frequency

Abstract

The invention discloses a wind resource grid division method based on wind direction frequency, which is characterized in that it comprises the following steps: step 1, obtaining wind measurement data, including wind speed data and wind direction data; step 2, calculating wind direction frequency and drawing wind direction rose Figure; step 3, determine the main wind direction; step 4, determine the minimum horizontal resolution L1 of the main wind direction; step 5, according to the ratio of the main wind direction and the total number of grids in any wind direction is equal to the ratio of the corresponding wind direction frequencies of these two wind directions , to obtain the minimum horizontal resolution in each wind direction; step 6, perform grid division according to the minimum horizontal resolution calculated in different wind directions. The total number of grids in each wind direction is related to the minimum horizontal resolution of the main wind direction and the frequency of the wind direction, so that the grid division method can better realize human control and is closely related to the characteristics of the project. It not only has good engineering reliability, but also can be more Rational use of computer resources greatly improves computing efficiency.

Description

technical field [0001] The invention relates to a wind resource grid division method based on wind direction frequency. Background technique [0002] Since the 1990s, countries around the world have adopted numerical simulation technology to carry out wind resource assessment and developed wind resource numerical simulation systems. At present, wind resource numerical simulation has become the main technical means of wind resource assessment. Among them, the wind resource assessment software adopts the computational fluid dynamics (CFD) method for numerical simulation. The wind resource CFD software is not only suitable for general terrain, but also has good applicability for wind energy resource assessment of complex terrain, but it is still in practice. There is a common problem. For example, the wind resource assessment software Meteodyn WT mainly calculates and simulates the different directions of the inlet wind, and uses block structured grids to grid the entire space,...

AI Technical Summary

Problems solved by technology

Especially for complex terrain with a large distribution of wind farm areas, the use of a smaller minimum horizontal resolution will often lead to a multiplication of grid points, and this multiplication occurs in all wind directions. Parallel calculations in multiple wind directions may even lead to the inability to The grid is divided according to the set minimum horizontal resolution, because the total grid calculation allowed by the computer with a specific memory is determined, and the number of grids allowed to be calculated in each wind direction will be evenly distributed when multi-wind direction parallel operation is performed. However, this uniform distribution is unnecessary in windy directions, especially when the number of grids in a single wind direction exceeds half of the allowable total number of grids, the software cannot perform multi-wind direction parallel calculations

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