Annualized Wind Energy Improvement Using Variable Speed

Research output: Contribution to journalArticlepeer-review


To optimize the operation of a wind turbine, variable turbine speeds are desirable. To determine the advantages of a variable-speed turbine, the annualized energy production of the turbine needs to be considered. This is done by using a Rayleigh probability distribution to determine the number of hours of a particular wind speed which occur in a given year. This distribution is used with theaerodynamic power generated at a given average wind speed to determine the total energy generated during the year. The total energy for fixed- and variable-speed turbine control are compared. The variable-speed turbines show improved energy production over the constant-speed systems.
Original languageAmerican English
Pages (from-to)1444-1447
Number of pages4
JournalIEEE Transactions on Industry Applications
Issue number6
StatePublished - 1997

NREL Publication Number

  • NREL/JA-500-24429


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