10.1186/2251-6832-3-27

Mixture probability distribution functions to model wind speed distributions

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  • Ravindra Kollu*1,
  • Srinivasa Rao Rayapudi1,
  • SVL Narasimham2,
  • Krishna Mohan Pakkurthi1,
  1. Department of Electrical and Electronics Engineering, J.N.T. University Kakinada, Kakinada, Andhra Pradesh, 533003, IN
  2. Computer Science and Engineering Department, School of Information Technology, J.N.T. University Hyderabad, Hyderabad, Andhra Pradesh, 500085, IN
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Published in Issue 2012-10-05

How to Cite

Kollu, R., Rayapudi, S. R., Narasimham, S., & Pakkurthi, K. M. (2012). Mixture probability distribution functions to model wind speed distributions. International Journal of Energy and Environmental Engineering, 3(1 (December 2012). https://doi.org/10.1186/2251-6832-3-27
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Abstract

Abstract Accurate wind speed modeling is critical in estimating wind energy potential for harnessing wind power effectively. The quality of wind speed assessment depends on the capability of chosen probability density function (PDF) to describe the measured wind speed frequency distribution. The objective of this study is to describe (model) wind speed characteristics using three mixture probability density functions Weibull-extreme value distribution (GEV), Weibull-lognormal, and GEV-lognormal which were not tried before. Statistical parameters such as maximum error in the Kolmogorov-Smirnov test, root mean square error, Chi-square error, coefficient of determination, and power density error are considered as judgment criteria to assess the fitness of the probability density functions. Results indicate that Weibull-GEV PDF is able to describe unimodal as well as bimodal wind distributions accurately whereas GEV-lognormal PDF is able to describe familiar bell-shaped unimodal distribution well. Results show that mixture probability functions are better alternatives to conventional Weibull, two-component mixture Weibull, gamma, and lognormal PDFs to describe wind speed characteristics.

Keywords

  • Mixture distributions,
  • Probability density functions,
  • Wind speed distribution
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