Expert reports on wind – Verification

Our quality management system contains a comparison routine between the predicted energy yields of projects we have supervised and the real WEC's yields earned after realization. Many operators have supported us by providing operational data of their wind farms. In some cases, positions or types of WEC's differ from the status assumed for the prediction; this could be considered when the respective information were available. For some projects, we have to suppose that operational characteristics of the WEC's are not in accordance with the ones applied for the prediction. The proof of such deviations is not trivial and could only be considered in some exceptional cases.

The essential result of the study is shown in the following figure:

Besides the high fraction of projects having yields in the range between 90 %....110 % of the predicted ones, the study shows that the quality of the calculations has increased over the years - induced by improved availability of wind measurements and further climate data and enhanced calculation methods.

Verification of our calculations is continued. Results are permanently used by us to check and to improve our calculation methods.
You can support our verification by providing operational data of your project to us - we handle these information confidential and let you know about results.