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. The method is characterized by comprising the steps that 1, wind measurement data comprising wind speed data and wind direction data are acquired; 2, the wind direction frequency is calculated, and a wind rose is drawn; 3, the main wind direction is determined; 4, the minimum horizontal resolution L1 of the main wind direction is determined; 5, according to the rule that the total grid number ratio of the main wind direction to any wind direction is equal to the corresponding wind direction frequency ratio of the two wind directions, the minimum horizontal resolution of each wind direction is calculated; 6, according to the calculated minimum horizontal resolution of each wind direction, grid division is performed. The total grid number of the wind directions is related to the minimum horizontal resolution of the main wind direction and the wind direction frequency, so that the grid division mode is better manually controlled; the grid division mode is closely related to engineering project characteristics, so that good engineering reliability is achieved, computer resources are utilized more reasonably, and calculation efficiency is greatly improved.

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 MeteodynWT mainly calculates and simulates the different directions of the inlet wind, and uses a block structured grid to grid the entire space,...

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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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