Modelling Non-Stationary Wind Speed For Renewablwe Energy Systems Control

Abstract

This paper deals with the modelling of the wind speed, treated as a non-stationary process. In the proposed modelling methods, the wind speed has two components: a long and medium term-component, described by an available spectral characteristic in the low frequency range, and a non-stationary turbulence component, which is ”attached” to the medium and long-term component. Two procedures for turbulence component generation, using some shaping filters, are proposed. In both methods turbulence component proprieties are determined depending on current mean value of the medium and long-term component. Numerical results and comment concerning the implementation aspects are also presented.