Análise de vibrações mecânicas em aerogeradores de eixo vertical e correlação climática

Abstract

Wind energy has traces dated up to 3000 years ago, used for grain milling and irrigation in agricultural activities. But only recently in the early twentieth century was it applied to generate electricity (RAMOS, 2018). Brazil has a large capacity to generate wind energy, and with the incentives of the federal government, it has become the 10th largest producer of renewable energy in the world. With this arise concerns related to the efficiency, safety and useful life of the equipment used. This work presents the study carried out in an small vertical aero generator, taking measurements of linear displacement through accelerometers installed in the base of the same, data that refer to the oscillatory frequencies suffered. By doing the study of wind speed at the site of measurement campaigns and correlating data of it’s vibrations, it was possible to infer, it’s frequency spectral signature. This is intended to initiate a future study on how this affects and damages the structural installations of the tower of this generator, and how it can be used to perform predictive maintenance, resulting in a way to save on the repair of parts and prolong the life span of the wind turbine.