WT load measurements: A comparison between load-based and analytical calibration

摘要

For load measurements conducted on current wind turbines according to technical specification IEC 61400-13 load-based as well as analytically determined calibrations are possible. The uncertainties involved in load measurements due to the employment of these two methods may vary from application to application, which should be taken into account by the wind turbine designer/manufacturer. To this end, a comparative study is conducted to define the measurement uncertainties when applying load-based or analytical calibration. Examples are presented for the resulting load measurements and both techniques are assessed with respect not only to the uncertainties introduced but also to the specific requirements of each application.