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Research Abstracts 1995-1996: Report No. 96-02
 

Walker, S.N. and P. L. Barbour, “Sub-Hourly Wind Data Assessment - Juniper Point, Washington - July 1995,” OSU Wind Research Cooperative, WRC Report No. 96-02, December 15, 1995, 54 pp.,$13.50

The need exists to understand more about the behavior of the wind on times scales less than one hour in the Pacific Northwest's complex terrain.  Three data sets of one-minute averaged wind speed and diection for Juniper Point, Washington have been provided to the OSU Wind Research Cooperative for analysis by fellow WRC member FloWind Corporation.  Report WRC 95-01 examined a 11 day record of one-minute averaged windspeed and direction data for three sites (5, 8, and 12) in late October 1994.  Report WRC 96-01 examined and eight day record taken in late March 1995 for three sites (5, 8, and 18).  This report examines a thirteen day record taken the first part of July 1995 for three sites (5, 8, and 18).  Basic time series statistical and frequency domain analyses have been performed on this data.  the wind speed data was converted to simulated pwer output at three stes and the combination of power out put examined.  The format of the report is the same as the previous reports to allwo the reader to make comparisons.

Several observations were made in reference to this most recent set of data. Caution should be exercised when generalizing these observations to other time periods or locations.

  1.  Data needs to be sampled for averaging periods of five minutes or less to examine power output variations.
  2. For energy calculations, hourly averaging is a reasonable approximation until more sophisticated wind turbine dynamic modeling tools are available and practical to use.
  3. The data for the July 1995 period exhibited poor autocorrelation and spatial correlations among the three sites studied.
  4. The rate of power change - frequency distribution is altered when sites are combined.
All contents copyright 1999, WRC

Last updated: December 21, 1999