Establishment method and device of three-dimensional wake model, equipment and storage medium

Abstract

The embodiment of the invention discloses an establishment method and device of three-dimensional wake model, equipment and a storage medium. Firstly, prediction is performed based on a preset wake model and a mass conservation law; gaussian distribution of the wake flow wind speed at the initial vertical height is obtained; then a wind shear curve of an incoming flow wind speed is obtained; the rotation angle is calculated according to the wind shear curve; rotation correction is performed on the Gaussian distribution of the wake flow wind speed at the initial vertical height according to therotation angle; Gaussian distribution of wake flow wind speed with the corrected vertical height is obtained, then the wake flow speed of the horizontal plane is predicted to obtain Gaussian distribution of the wake flow wind speed of the horizontal plane, and finally a three-dimensional wake flow model is estqblished according to the Gaussian distribution of the wake flow wind speed with the corrected vertical height and the Gaussian distribution of the wake flow wind speed of the horizontal plane. The method for establishing the three-dimensional wake model provided by the embodiment of theinvention can improve the accuracy of predicting the wake area wind speed distribution by the wake model, and can be further applied to layout optimization and wind power prediction of a wind power plant.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of wind power generation, and in particular to a method, device, equipment and storage medium for establishing a three-dimensional wake model. Background technique [0002] With the continuous consumption of conventional fossil energy and the enhancement of people's awareness of environmental protection, wind energy, as a clean and pollution-free renewable energy, has attracted more and more attention from all over the world. According to the latest report of the World Wind Energy Association, by the end of 2017, the total installed capacity of wind turbines in the world reached 539GW, and the total power generation can meet more than 5% of the global electricity demand. However, while the wind power industry is developing rapidly all over the world, it is also facing many problems that need to be solved urgently. Among them, the wake effect has been widely studied as an important ...

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Problems solved by technology

Although the 2D wake model has been verified with the measured data to predict the wind speed distribution on the horizontal plane at the height of the wind turbine hub, and it has a good effect on the layout optimization of wind farms in flat terrain (the height of the wind turbine hub is consistent), However, for wind farms with complex terrain and inconsistent hub center heights, it is difficult to predict the wind speed distribution at the hub height of the wind turbine in the wake area only by the two-dimensional wake model.

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