Measurement campaigns for an offshore wind resource assessment with the in-house developed Fraunhofer IWES Wind Lidar buoy include the complete yield assessment for the development of an offshore wind project. The floating system integrates a ZephIR 300 or a Wind-cube® v2 Lidar device in an adapted marine buoy. Its compact design, an autonomous power system and an efficient data processing and communication system ensure reliable and flexible offshore wind measurement campaigns at minimal costs. The motion correction algorithm guarantees high data accuracy and measurement uncertainties similar to those for offshore mast measurements. The Wind Lidar buoy delivers reliable measurement data for all relevant project phases - including planning, installation and operation.
Fraunhofer developed a correction algorithm that allows LiDAR systems to carry out measurements even on moving structures. The algorithm subtracts the buoy’s own movement from the measurement values.
Brochure "Validated LiDAR system for flexible offshore site assessment"
Video: Offshore wind measuring campaign with a LiDAR buoy
• Wind velocity measurements up to 200 m
• Additional measurements available: waves, currents, temperature etc.
• Full service contract including permission, deployment, service, data transfer, quality control
• Wind resource assessment based on these data
• Measurement campaigns from one week to one year possible.
Ship-based LiDAR system
For flexible wind measurements under offshore conditions, the "ship-based Lidar system" facilitates the application of standard wind lidar technology on ships. Whereas measurements from fixed platforms or anchored buoys are a recommendable solution for long-term applications, a ship-based solution is best when a ship is in use at the location of interest anyway or when a measurement is needed for a rather short period only.
A prerequisite for a precise measurement from a moving ship is the correction of the measured data with respect to the concurrent motions. Hence, an integrated motion-measurement system is an essential part of the developed Ship-Lidar System. Data for the up to six degrees of freedom of the system placed on the ship are recorded with high resolution, processed and applied for a correction of the concurrently recorded lidar data.