Wind Resource Evaluation With Atmospheric Stability Across Different Surface Types

ABSTRACT This study investigates the influence of atmospheric stability on wind resource assessment across various surface conditions, focusing on wind shear and prevailing wind direction as key analytical parameters. The aim is to provide a scientific foundation and theoretical support for optimal wind farm site selection. Utilizing data from wind measurement towers at coastal, plateau, and mountainous wind farms, the research integrates power law and logarithmic law wind speed extrapolation models. By comparing wind shear indices, wind speed profiles, and wind rose diagrams across different terrains, the study systematically assesses the temporal and spatial variations in atmospheric stability and their impact on wind resources. The findings reveal that incorporating atmospheric stability into the assessment methodology enhances the accuracy of wind shear model parameters. Furthermore, accounting for temporal and spatial variations in wind shear parameters yields more precise results compared to using empirical or annual average wind shear models for wind speed extrapolation. The results offer significant theoretical insights and technical guidance for wind farm site selection and wind resource assessment, especially in complex terrains. They are particularly valuable for the deployment of modern wind turbines with high hub heights, providing substantial practical relevance for engineering applications.