Session: 09-01-01 Wind Turbine Aerodynamics and Control

Submission Number: 157015

The Influence of Aerodynamic Load Extraction on System Response in Real-Time Hybrid Test for Floating Wind Turbine: An Experimental Study 

As one of the proven approaches of advancing the traditional offshore engineering model test, especially in the floating wind turbine (FWT) region, real-time hybrid model test (RTHT) method can break through the limits in facility size, model mass distribution, high quality wind field generation and full-functional nacelle model application. Different RTHT methods for FWT are proposed based on the differences in how the system is divided. One of the mainstreams of the RTHT for FWT is to conduct the test in wind tunnel, where the floating structure and wave basin are replaced by the multi-degree motion platform and real-time numerical code. In this technological route, the aerodynamic load identification and extraction plays an important role. This paper starts with the dual-accelerometer method of aerodynamic load extraction on the basis of RTHT system setup. Then the aerodynamic load extraction method is verified in both steady and turbulent wind conditions. The second part of this paper analyzes the parametric errors in both the model wind turbine mass and inertia under different error combinations during applying the aerodynamic load extraction. The error influences on system motion and structural load are taken into discussion based on experimental results. The results indicate that dual-accelerometers method can properly identify the aerodynamic load during RTHT loop. The studied RTHT system is more sensitive to mass parameter than the inertia parameter. Under the same level of error, the reproduction of pitch motion is more sensitive among the 3 main degrees. The study in this paper provides references and support for the data interaction and processing between the subsystems of system during the practice of the RTHT method.

Presenting Author: Zhihao Jiang State Key Laboratory of Ocean Engineering

Presenting Author Biography: Ph.D Candidate. I'm mainly engaged in floating wind turbine wave basin model test and technology upgrade, especially introducing the RTHT method into traditional offshore structure model tests.