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Title of Journal: J Cent South Univ

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Abbravation: Journal of Central South University

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Central South University

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DOI

10.1002/cjce.5450590615

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2227-5223

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Characteristics for wind energy and wind turbines

Authors: Yuqiao Zheng Rongzhen Zhao
Publish Date: 2015/06/12
Volume: 22, Issue: 6, Pages: 2393-2398
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Abstract

The probability distributions of wind speeds and the availability of wind turbines were investigated by considering the vertical wind shear Based on the wind speed data at the standard height observed at a wind farm the powerlaw process was used to simulate the wind speeds at a hub height of 60 m The Weibull and Rayleigh distributions were chosen to express the wind speeds at two different heights The parameters in the model were estimated via the least square LS method and the maximum likelihood estimation MLE method respectively An adjusted MLE approach was also presented for parameter estimation The main indices of wind energy characteristics were calculated based on observational wind speed data A case study based on the data of Hexi area Gansu Province of China was given The results show that MLE method generally outperforms LS method for parameter estimation and Weibull distribution is more appropriate to describe the wind speed at the hub heightFoundation item Project51165019 supported by the National Natural Science Foundation of China Project1308RJYA018 supported by Gansu Provincial Natural Science Fund China Project20134110 supported by Lanzhou Technology Development Program China

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