Energy yield assessments

The profitability analysis of your future wind farm

Our experts evaluate the influence of external factors on the wind conditions of your specific wind farm site:

  • The basis for this evaluation is wind data measured at or near the site or the operating results of comparative wind turbines. Based on the evaluation of their representativeness for the site, it is checked whether the data are usable. Representativeness depends on the terrain, vegetation, and extent of the proposed wind farm.
  • The site-representative wind data or operational data are adjusted to a long-term representative level (usually between 10 and 20 years). A suitable flow model is used to simulate the long-term representative data to the positions of the later turbines at their hub heights.
  • In the next step, these position-specific wind conditions are combined with the power characteristics of the planned WTs and a potential energy yield at each of these positions is determined.
  • Using another physical model, the loss due to shading between the turbines is determined. The result is the parking yield. Losses for other site conditions as well as system conditions are subtracted from it. These are, for example, the grid and transmission losses, the unavailability of the WT, the infrastructure or the grid as well as operational restrictions due to noise or for the protection of birds and bats.

The results of these expert opinions essentially form the basis for evaluating a wind farm in terms of energy yield. They are the basis for profitability calculations and the classification of the site-specific site quality as the basis for the remuneration level in the respective current EEG.