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Submitted to: Windpower
Publication Type: Proceedings Publication Acceptance Date: 8/1/1996 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Numerous papers and publications on wind turbulence have referenced the wind speed spectrum presented by Isaac Van der Hoven in his article entitled "Power Spectrum of Horizontal Wind Speed Spectrum in the Frequency Range from 0.0007 to 900 Cycles per Hour (Journal of Meteorology, Vol. 14, 1957, p. 160). Van der Hoven used data measured at different heights between 91 and 125 meters above the ground, and represented the high frequency end of the spectrum with data from the peak hour of hurricane Connie (13 August 1955). These facts suggest we should question the use of his power spectrum in the wind industry. During the USDA-Agricultural Research Service's investigation of wind/diesel system power storage, using the appropriate wind speed power spectrum became a significant issue. We developed a power spectrum from 13 years of hourly average data, 1 year of 5 minute average data, and 2 particularly gusty day's 1 second average data aall collected at a height of 10 meters. While the general shape is simila to the Van der Hoven spectrum, few of his peaks were found in the Bushland spectrum, this is not always true. Also, the high frequency end of the spectrum is not accurately described by simple wind statistics such as standard deviation and turbulence intensity. |
