Incorporating air density into a Gaussian process wind turbine power curve model for improving fitting accuracy

Ravi Kumar Pandit, David Infield, James Carroll

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)
27 Downloads (Pure)


A power curve conventionally represents the relationship between hub height wind speed and wind turbine power output. Power curves facilitate the prediction of power production at a site and are also useful in identifying the significant changes in turbine performance which can be vital for condition monitoring. However, their accuracy is significantly influenced by changes in air density, mainly when the turbine is operating below rated power. A Gaussian process (GP) is a nonparametric machine learning approach useful for power curve fitting. Critical analysis of temperature correction is essential for improving the accuracy of wind turbine power curves. The conventional approach is to correct the data for air density before it is binned to provide a power curve, as described in the IEC standard. In this paper, four different possible approaches of air density correction and its effect on GP power curve fitting model accuracy are explored to identify whether the traditional IEC approach used for air density correction is most effective when estimating power curves using a GP. Finding the most accurate air density compensation approach is necessary to minimize GP model uncertainty.
Original languageEnglish
Pages (from-to)1-14
Number of pages14
JournalWind Energy
Publication statusPublished - 22 Oct 2018


  • Gaussian process models
  • wind turbines
  • SCADA data
  • air density
  • condition monitoring
  • power curve


Dive into the research topics of 'Incorporating air density into a Gaussian process wind turbine power curve model for improving fitting accuracy'. Together they form a unique fingerprint.

Cite this