Summary
A first evaluation of the characteristics of periodic fluctuations of the horizontal wind speed component at the ground has been determined in six stations in Sardinia. The analysis takes into account only wind speed component without considering variations in wind direction. The spectral analysis shows large variations in magnitudes from site to site and from season to season concerning the fundamental harmonic (24 hour) and the harmonics of periodT/2,T/3 andT/4. The largest fluctuations are associated with regimes of great windiness andvice versa.
Riassunto
Una prima valutazione delle caratteristiche delle fluttuazioni periodiche della componente orizzontale del vento a terra è stata effettuata prendendo in esame sei stazioni anemometriche situate in Sardegna. L'analisi spettrale ha messo in evidenza variazioni non trascurabili nelle ampiezze dell'armonica fondamentale (24 ore) della velocità del vento che dipendono dalla localizzazione delle stagioni e dalla stagione. In generale si può mettere in evidenza una relazione empirica che associa le ampiezze delle fluttuazioni con i valori medi stagionali della velocità del vento.
Резюме
На шести анемометрических станциях в Сардинии проведена первая оденка параметров периодических флуктуадий горизонтальной составляющей скорости ветра на поверхности Земли. Анализ учитывает только компоненту скорости ветра, не рассматвивая изменения направления ветра. Спектральный анализ обнаруживает большие изменения по амплитуде в зависимости от местоположения и от сезона при исследовании основной гармоники (24 часа) и гармоник с периодамиT/2,T/3 иT/4. Наибольшие флуктуации связаны с режимами сильного ветра и наоборот.
Similar content being viewed by others
References
J. C. Kaimal, J. C. Wyngaard, Y. Izumi andO. R. Cote:Q. J. R. Meteorol. Soc.,98, 563 (1972).
H. A. Panofsky, R. Larko, R. Lipshultz andG. Stone:Q. J. R. Meteorol. Soc.,108, 215 (1982).
K. C. Chon andR. B. Carotis:Sol. Energy,26, 199 (1981).
E. A. Bossanyi:Short-term stochastic wind prediction and possible control application, inProceedings of Delphi Workshop on Wind Application, edited byG. Bergeles andJ. Chadyvassiliadis (Athens, 1985).
A. S. Smedman andN. Hagstrom:A practical method to estimate turbolence spectra for WECS siting in heterogeneous, nonmountainous terrain, inProceedings of Delphi Worskhop on Wind Energy Application, editedG. Bergeles andJ. Chadyvassiliasis (Athens, 1985).
J. S. Bendat:Measurement and Analysis of Power Spectra and Cross-Power Spectra for Random Phenomena (Thompson Ramo Wooldrig, Canaga Park, Cal., 1960).
W. E. Byrley:An Elementary Treatise on Fourier's Series (Dover Publ. Inc., New York, N. Y., 1959).
E. Proverbio, V. Quesada andC. Guiso:Preliminary values of available wind power over large areas in Sardinia, inProceeding of Delphi Workshop on Wind Energy Application, edited byG. Bergeles andJ. Chadyvassiliadis (Athens, 1985).
R. B. Corotis:Stochastic modelling of site wind characteristics Final Rep. Number RLO/2342-77/2 for ERDA Contract number EY-76-S-06-2342.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Proverbio, E., Quesada, V. Spectral analysis of wind speed determined at different sites in Sardinia. Il Nuovo Cimento C 12, 277–287 (1989). https://doi.org/10.1007/BF02507200
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02507200