The so called „technische Richtlinie 6“ of the FGW (Fördergemeinschaft Windenergie) describes how the wind potential and the potential energy yield at a certain site has to be estimated in regard of the selected turbine. Banks and investors in Germany will accept an energy yield study which has been conducted in accordance with the TR6 when financing the wind farm project.
TR6 guarantees a bankable energy yield study!
The new TR6 Rev. 9 stipulates what wind energy consultants already recommended during the last years:
- A measurement is imperative when no data source (turbine or met mast) is available in the range of 10 km in flat terrain or in the radius of 2 km in complex terrain
- Remote sensing (Lidar or Sodar) or Ultrasonic is possible, however, taking higher uncertainties into account.
In the northern German lowlands usually several turbines are available within 10 km, but not in the highlands and in Southern Germany. And certainly not at 2km radius! The result: when planning a wind farm in Germany in the highlands a high quality wind measurement is necessary in most cases.