Wind measurements

The staff of aj profits from more than 35 years of experience in measurement techniques for wind energy. In the meanwhile, wind measurements have become one of our core activities. In Germany, we mainly use Sodar instruments for this purpose, since the instruments selected by aj are particularly reliable and offer the best cost/benefit ratio for wind measurements at large heights. The Sodar wind measurements of aj are in agreement with the requirements of the German TR 6 guideline.

Since recently, aj additionally offers wind measurements using Lidar instruments. This enables a more project specific planning of your measurement campaign.

In the meanwhile, aj owns 15 high quality Sodar instruments of the types AQ500 and AQ510 WindFinder of the manufacturer AQSystem as well as 4 Windcube Lidars of the manufacturer Leosphere. All of them are permanently in operation in a large range of landscapes. The operational results of several wind farms confirm the results of aj wind resource assessments based on our Sodar measurements!

Short term wind measurements with Sodar instruments deliver fast and at low cost important initial information for first estimates and many aspects of strategy finding.

aj also uses Sodar instruments for fast and cost efficient verification of the power performance of wind turbines. With this, aj has already contributed to the improvement of power performance.

Since 2003, aj performs met mast based wind measurements both in Germany and outside of Germany. Even under extreme site conditions, aj achieves high data quality and availability.

The measurement strategy is an essential element for a successful wind measurement that best serves its purpose. aj provides advice on all aspects of measurement strategies, among others

• Selection of the measurement location: This influences the uncertainty oft he wind resource assessment tremendously!
• Definition of the measurement system (Sodar, Lidar, mast with cup anemometer, ultrasonic anemometer, prop vane, …)
• Duration of the measurement campaign
• Number of measurement positions
• Integration and training of local stuff

The wind measurement may be supervised and documented either by aj or by your staff after our training. Besides transferring our know how, we can provide any necessary equipment for performing the wind measurement.

Besides wind measurements to determine the wind resource, aj has extensive experience in:

• Verification of remote sensing instruments
• Load measurements
• Calibration of load measurements