Extended Onshore Control of a Floating Wind Turbine with Wave Disturbance Reduction

The Science of Making Torque from Wind 2012

Christiansen, S.^1 ; Knudsen, T.^1 ; Bak, T.^1

Automation and Control, Department of Electronic Systems, Aalborg University, Fredrik Bajers vej 7C, Aalborg Øst

9220, Denmark^1

关键词: Control strategies;    Damped oscillations;    Disturbance reduction;    Floating structures;    Floating wind turbines;    Power fluctuations;    Wave disturbances;    Wave-induced loads;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/555/1/012018/pdf
DOI  :  10.1088/1742-6596/555/1/012018

来源: IOP

【 摘 要 】

Reaching for higher wind resources beyond the water depth limitations of monopile wind turbines, there has arisen the alternative of using floating wind turbines. But the response of wave induced loads significantly increases for floating wind turbines. Applying conventional onshore control strategies to floating wind turbines has been shown to impose negative damped oscillations in fore-aft due to the low natural frequency of the floating structure. Thus, we suggest a control loop extension of the onshore controller which stabilizes the system and reduces the wave disturbance. The results shows that when adding the suggested control loop with disturbance reduction to the system, improved performance is observed in power fluctuations, blade pitch activity, and platform oscillations.