Wind Energy Assessments

Wind Farm Planning

Roughness and orography map as a basis for wind speed assessments
Roughness and orography map as a basis for wind speed assessments

The success of a wind farm depends on precise planning and continuous, dependable checks and inspections during turbine operations. Risks and uncertainties should be determined as early as possible to guarantee efficiency.

Accordingly, at the beginning of a wind farm project or project review a number of external assessments are required - an important basis for successful project planning.


For over 25 years, Overspeed has issued expert assessments in the following areas:

  • Wind speed assessments
  • Energy yield predictions
  • Profit predictions
  • Comparative analysis of energy assessments
  • Determination of plausibility of energy yield assessments
  • Turbulence assessment for turbine stability proof

  • Wake impact on overhead powerlines (informationen on our flyer)
  • Shadow casting
  • Noise emissions
  •  Loss calculations due to

    • sectorial restictions in operations (turbulence, stability)
    • operation restrictions due to noise emissions
    • wind turbine shut-down due to rotor shadow casting
    • wind turbine shut-down for animal protection

  • Planning and operation of wind measurement campaigns

Quality Assurance

We work independently of all manufacturers according to the current level of science and technology and in accordance with national and international guidelines and wind energy standards, e.g.  IEC 61400-1, IEC 61400-12, FGW-Richtlinie TR6.

Turbulence effects

Both environmental and wind farm turbulence can lead to increased wind turbine loads and may exceed design limits (stability proof). Overspeed determines site-specific turbulence intensity as part of its turbulence as-sessment, checks whether parameter limits of the relevant guidelines have been exceeded, and optimizes wind turbine sites, making use of sector management as well, where necessary.

We are happy to advise you personally and prepare your own individual offer.

This information is also available on our flyer:

German version
English version