Check of the performance and in particular the yaw behaviour of wind turbines

Site: Small wind farm in the state of Bavaria, Germany

Method:

• Wind measurement by Sodar
• Analysis of SCADA data of the wind turbines

Results:

• The power curves as determined on the turbines are sufficiently in agreement with the warranted levels. However, improvements are possible.
• The yaw algorithm of one of the investigated turbines is far from optimal.
• A check after a corresponding software change showed a significant improvement.
• One of the turbines is on average not aligned optimally with the wind direction. A change would result in an increase of the energy capture by several percent.