Run Duration Analysis of Surface Wind Speeds for Wind Energy Application

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Abstract
Hourly wind speed records are used to develop a model for the probability distribution of wind speed persistence above and below fixed reference speeds. Examination of duration histograms from 19 sites for records varying from 5–24 years leads to the development of a simple composite distribution. Enforcement of smooth behavior and a parameter sensitivity analysis allow the model to be interpreted in terms of a single free parameter, which is then shown to be highly correlated to the seasonal mean wind speed at a site. Comparison of run duration results for 1 and 3 h data (the latter being the standard digitization presently used by the National Climatic Center) indicates a definite bias with the 3 h records. A correction scheme is derived to improve the 3 h results.

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