Re-assessment of energy production


Re-assessment of energy production

Site: medium size wind farm in Eastern Germany


  • profound analysis of SCADA data and monthly production data
  • wind measurement with a Sodar instrument used for comparison purposes
  • comparison of all data with a neighbouring wind farm
  • model calculations


  • reduction of the long term mean energy production has a significant contribution to the overall difference between the predicted and the real energy production
  • calculation of wake losses is realistic
  • the total energy production of the main comparison wind farm in the original assessment report with wind turbines of the same manufacturer is significantly higher than predicted and as could be expected considering the location of the wind farm, however the procution data could be verified by the feeded energy production
  • the new wind turbines are a new type of the same manufacturer, however, the predicted power curves differ significantly from those of the comparison turbines


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