SciELO - Scientific Electronic Library Online

 
vol.28 issue2Solar resource classification in South Africa using a new index author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • On index processSimilars in Google

Share


Journal of Energy in Southern Africa

On-line version ISSN 2413-3051
Print version ISSN 1021-447X

Abstract

DE KLERK, Martinus Gerhardus  and  VENTER, Willem Christiaan. Power calculation accuracy as a function of wind data resolution. J. energy South. Afr. [online]. 2017, vol.28, n.2, pp.71-84. ISSN 2413-3051.  http://dx.doi.org/10.17159/2413-3051/2017/v28i2a1656.

Wind power calculations are usually based on average wind data taken over one-hour intervals. The effect of the wind data resolution on the statistical techniques used to calculate the probable power output (PPO) is commonly overlooked. This effect is analysed in this paper by iteratively calculating and comparing the PPO of a wind turbine using data, averaged over different periods, obtained from Wind Association of South Africa. The power is calculated using both Weibull representation and direct polynomial substitution techniques in order to compare and verify the results. The results indicate a fairly linear relationship between the resolution used and the PPO error incurred. These results raise an interest to examine the effects of a fine resolution on the data in terms of data dependence, which may violate the criteria for the majority of statistical tests and procedures.

Keywords : data resolution analysis; wind power; Weibull.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License