Vibration Deformation Monitoring of Offshore Wind Turbines Based on GBIR

In view of the disadvantages of vibration safety monitoring technology for offshore wind turbines, a new method is proposed to obtain deformation information of towering and dynamic targets in real-time by the ground-based interferometric radar(GBIR). First, the working principle and unique advantages of the GBIR system are introduced. Second, the offshore wind turbines in Rongcheng, Shandong Province are selected as the monitoring objects for vibration safety monitoring, and the GPRI-II portable radar interferometer is used for the health diagnosis of these wind turbines. Finally, the interpretation method and key processing flow of data acquisition are described in detail. This experiment shows that the GBIR system can accurately identify the millimeter-scale vibration deformation of offshore wind turbines and can quickly obtain overall time series deformation images of the target bodies, which demonstrate the high-precision deformation monitoring ability of the GBIR technology. The accuracy meets the requirements of wind turbine vibration monitoring, and the method is an effective spatial deformation monitoring means for high-rise and dynamic targets. This study is beneficial for the further enrichment and improvement of the technical system of wind turbine vibration safety monitoring in China. It also provides data and technical support for offshore power engineering management and control, health diagnosis, and disaster prevention and mitigation.