Avaliação do desempenho de uma turbina eólica do eixo vertical híbrida acoplada a um gerador de baixa rotação de estator permanente para geração de corrente eléctrica

Abstract

The electrification in the country is not uniform, that is the distribution of the electricity network is not present in all corners of the territory, and some districts are not yet connected to the national electricity network. This work presents the performance analysis of a vertical axis wind turbine coupled to a low speed permanent stator generator, which operates at variable wind speeds. For this was built a turbine and a generator with local material and installed in the School of Marine and Coastal Sciences. To monitor and evaluate the operation of the system, an upstream anemometer was installed to acquire wind data recorded instantly during the study period and a multimeter used to measure the current and voltage generated by the generator. With wind data measured locally, it was possible to calculate the energy that can be harnessed by the turbine and with the data of voltage and current produced was obtained the electrical power that the generator produced during a period. And for determination of the yield of the whole system was made the relation between the available energy in the wind capable of being harnessed and the energy produced by the generator. With wind data processed in a Microsoft Office Excel package, the energy converted by the turbine and its power coefficient, which relates the energy converted by the generator and the energy contained in the wind in a given time interval, was calculated. However, the results regarding electric power maxima were 12 we and a voltage of 1.2 V, the wind intensity of 4 m/s, the yield in this case evaluated if at 8%, at an electric current intensity of 3 A. the available mechanical energy extracted by the turbine was 68.59 watts and 1.07 watts at speeds of 4 m/s and 1 m/s respectively. With the results obtained, it can be concluded that the performance was considered as acceptable, with an accurate prediction of 100% power output by the turbine.