NUMERICAL SIMULATION OF THE ROTATIONALLY SAMPLED WIND SPEED FOR LARGE WIND TURBINES

Autor/autori: PhD student, Eng. Adriana BURLIBASA (SCARLAT), Prof. PhD, Eng. Emil CEANGA

Rezumat: Lucrarea prezinta modelarea fluctuatiilor vitezei vantului intr-un punct de pe pala unei turbine eoliene de mare putere, in scopul analizei dinamicii sistemului eolian si a structurilor de control asociate. Procedura propusa include doua etape: 1) obtinerea spectrului rotational de esantionare al turbulentei intr-o reprezentare neparametica, utilizand tehnicile corelationale si 2) parametrizarea modelului neparametric al spectrului rotational de esantionare printr-un filtru de formare multirezonant, care genereaza turbulenta ca o serie de timp. Pe aceste baze, sunt prezentate rezultatele numerice privind simularea numerica a fluctuatiilor vitezei vantului intr-un punct de pe pala unei turbine eoliene de mare putere (2MW).

Cuvinte cheie: turbina eoliana, turbulenta vitezei vantului, densitate spectrala de putere, spectru rotational de esantionare

Abstract: This paper deals with an approach for wind speed fluctuations modeling on the rotating blade of a large wind turbine, in order to achieve the numerical analysis of the wind system performances. The proposed approach has two steps: 1) obtaining the rotationally sampled spectrum of the wind speed turbulence as a non parametric representation, using the cross correlation technique and 2) parameterization of the non parametric spectrum through a multi-resonant shaping filter, which generates the turbulence component of the wind speed as a time series. Some simulation results of the rotationally sampled wind speed fluctuations for a large wind turbine (2MW) are also presented in the paper

Keywords: wind turbine, wind speed turbulence, power spectral density, rotationally sampled spectrum

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