Influência do Cisalhamento Vertical do Vento na Produção Anual de Energia na Região Costeira do Nordeste do Brasil

Abstract

The wind has special properties that are not easy to detect using conventional measurement methods. Fluctuations in the atmospheric flow can cause a significant difference between the expected and actual energy production in some installations. Given the Brazilian wind potential and the need to understand the impact of micrometeorological phenomena on wind turbine performance, this work presents a comparative analysis of the available energy potential evaluated with two different methodologies. The first uses the wind speed at tower height (HHWS) and the second the equivalent rotor wind speed (REWS) measured by a wind profiler. These two predictions are compared and the differences between them are analyzed taking into account possible local micrometeorological phenomena that cause variations in wind generation, such as wind shear and atmospheric stability. The results show that the REWS method enables a more accurate prediction of annual energy production as it better captures changes in flow.