Determinación de los parámetros de Weibull para el potencial energético de los emplazamientos eólicos en la sierra ecuatoriana provincia de Chimborazo

Abstract

This investigation performed a probabilistic statistical analysis that allowed detecting the parameters of the Weibull distribution for the wind energy potential in the province of Chimborazo, using the data monitored by the Alternative Energies and Environment Group (GEAA) of the Polytechnic of Chimborazo, of two weather stations located in Riobamba canton: Lomas de Rasutambo sector Pinanquil Zone (EL Arenal) and in San Juan Parish. Using the variables, speed (m/s) and direction of the wind in a three-year period (2018-2020), the parameters (k) and (c) of the Weibull distribution were calculated using the statistical software R by three different estimation methods: The method of least squares, the maximum likelihood method, and the empirical method; to decide the most appropriate method with which the wind energy potential was determined for both stations. The behavior of the data was obtained through a descriptive analysis, where anomalous data that were separated from the database were evidence. The annual speed mean of the Lomas de Rasutambo station was 11.59 m/s, and at the San Juan station it was 4.10 m/s, with a power density of 607.64w/m2, and 26.87 w/m2 respectively, showing that the best parameter estimation method for the former station was the method of least squares and for the latter it was the empirical method. It is concluded that in El Arenal sector the creation of a wind power plant is feasible, while in San Juan is not, because its value is less than the favorable range (200 w/m2). It is recommended constant maintenance of weather stations to avoid loss of information.