Re-assessment of energy production

Re-assessment of energy production

Site: medium size wind farm in Northern Germany; the real energy production is much lower than calculated in the original assessment report

Procedure: profound analysis of SCADA data

Results:

• reduction of the long term mean wind resource, albeit its contribution to the overall result is small compared to the following aspects
• thrust coefficients too low
• power curves are not reached in the wake of neighbouring turbines
• strong deflection of the flow due to the specific wind farm layout in terms of very low distances between wind turbines