Técnicas de remoção de outliers na curva de potência de aerogeradores e parametrização da curva de operação normal

Abstract

The power curve is an important way to evaluate the energy production of wind turbines. It expresses the ratio of the active power of the wind turbine as a function of wind speed. Analyzing this curve makes it possible to evaluate the performance of the wind turbine. However, abnormal values on this curve make it impossible to effectively analyze the performance, as they may disturb the analysis, and cause invalid conclusion. This work proposes to remove these anomaly points using methods already widespread in the scientific environment for removing outliers in power curves, with the application of these methods in a real database. In addition, the work proposes the parameterization of the normal curve, so that the functions that represent its shape can be obtained. This process will take place through polynomial interpolations, and with that it will be possible to obtain the coefficients that allow the storage of these functions in a simple way. Finally with the parameterization of this curve, we analyze the performance of wind turbines.