Estudo de medição e análise do ruído de aerogeradores de grande porte no Estado do Ceará

Abstract

With the rapid expansion of wind power during the beginning of 21st century in Brazil and worldwide, many wind turbines of different and innovative technologies began operations. Many of the environmental and operational consequences of this expansion are still being studied and evaluated. Among the environmental consequences, one can mention the noise produced by larger diameter wind turbines, whose frequencies are often not audible, although perceptible to the human brain. In this work were made measurements of the noise associated with wind turbines in the state of Ceara. It was initially made the characterization of wind turbine noise, identifying sources, frequencies, composition, intensity and impacts to health. Experimental measurements of sound in large wind generators were made in direct-drive wind turbine generators, in the city of Aracati, State of Ceara, in the light of the international standard IEC 61400-11, documenting the methodology applied in a manner that is easily replicated. The experimental results were processed and analyzed according to the standard. Filters were applied in order to identify the frequency and types of most significant noise in the experiment, comparing them with the literature. The procedures performed and documented may be applied commercially to perform noise measurements under international standard, and in future studies applied to predictive maintenance and environmental engineering.