Optimal time step of SCADA data for the power curve of wind turbine

Abstract

The SCADA system for wind turbine often logs data at 10 minutes time step, mostly due to the technical constraints. However, with the developpement in measurement and storage technology, the collection of data with higher sampling frequency is feasible. The question about an optimal time step for SCADA data is then become interesting. Our paper aims to answer this question through a statistical analysis of the power curve at different time step. In order to explain and confirm the results of this study, a spectral analysis is performed. Both approaches indicate that the time step of 10 minutes is still the best choice as it gives the best predictability of the output power from wind speed.