A Noise Prediction and Optimal Layout Method for Flat Terrain Wind Farms

Abstract

The invention provides a noise prediction and layout optimization method for a flat terrain wind power plant. The noise prediction and optimization layout method for the flat terrain wind power plantcomprises the following steps that 1, on the basis of a wind power plant engineering wake flow model, generating the incoming flow wind speed of each wind turbine in the wind power plant, and calculating the aerodynamic noise source of each wind turbine; 2, simplifying the three-dimensional PE parabolic equation, and calculating a wind turbine noise propagation database based on a two-dimensionalnoise propagation equation of a single wind turbine; Step 3, according to the wind turbine noise propagation database obtained in the step 2, carrying out wind power plant noise numerical simulation calculation by using a wind power plant noise propagation multidimensional interpolation formula; And 4, optimizing the optimized layout of the wind power plant meeting the sound pressure level contourline by adopting a maximum sound pressure boundary value taking method.

Description

technical field [0001] The invention relates to a method for noise prediction and optimal layout of a wind farm with flat terrain, belonging to the technical field of wind power generation. Background technique [0002] Scholars at home and abroad have done a lot of research work on the optimal layout method of wind farms, such as considering the annual power generation AEP, wind farm area and road constraints, wind farm cost, and wind power based on the ISO international outdoor noise propagation semi-empirical method. Field noise optimization layout, etc. For the current optimal layout design of wind farms, there are many methods, but there are few methods for optimizing the layout of wind farm aerodynamic noise. [0003] However, with the large-scale development of wind farms, the aerodynamic noise of wind farms has had a certain impact on humans and animals. The noise prediction of wind farms is becoming more and more important. At present, the existing optimal layout m...

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Problems solved by technology

For the current optimal layout design of wind farms, there are many methods, but there are few methods for optimizing the layout of wind farm aerodynamic noise

[0003] However, with the large-scale development of wind farms, the aerodynamic noise of wind farms has had a certain impact on humans and animals. The prediction of wind farm noise is becoming more and more important. Currently, the existing optimal layout methods for wind farm noise are mainly Evaluation and layout optimization are based on the semi-empirical formula of the ISO international standard; some scholars also conduct numerical simulation of the sound source and propagation of the noise of a single or multiple wind turbines based on CAA (Computational Aerodynamics and Aeroacoustics). Although this method has a high calculation accuracy, However, the amount of calculation is huge, especially for the optimal layout of wind farms, it is almost impossible to achieve

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