Vibration Reduction Strategy for Offshore Wind Turbines
| Autor: | Bofeng Xu, Xiaoling Yuan, Min Zhao, Suxiang Yang, Liu Haoming, Wei Tian |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
020209 energy 02 engineering and technology Turbine lcsh:Technology Physics::Fluid Dynamics lcsh:Chemistry wind force 020901 industrial engineering & automation Pitch control Sea breeze wave force aerodynamic torque Wind shear 0202 electrical engineering electronic engineering information engineering vibration reduction General Materials Science Pitch angle Instrumentation lcsh:QH301-705.5 Physics::Atmospheric and Oceanic Physics Fluid Flow and Transfer Processes lcsh:T Process Chemistry and Technology General Engineering lcsh:QC1-999 Computer Science Applications Power (physics) Vibration Offshore wind power lcsh:Biology (General) lcsh:QD1-999 pitch control lcsh:TA1-2040 Physics::Space Physics Environmental science aerodynamic load lcsh:Engineering (General). Civil engineering (General) lcsh:Physics Marine engineering |
| Zdroj: | Applied Sciences, Vol 10, Iss 6091, p 6091 (2020) Applied Sciences Volume 10 Issue 17 |
| ISSN: | 2076-3417 |
| Popis: | The operational environment of offshore wind turbines is much more complex than that of onshore wind turbines. Facing the persistent wind and wave forces, offshore wind turbines are prone to vibration problems, which are not conducive to their long-term operation. Under this background, first, how the wave affects the vibration characteristics of offshore wind turbines is analyzed. Based on the existing wave and wave load models, we analytically show that there exist fluctuating components related to the hydrodynamic frequency in the aerodynamic load and aerodynamic torque of offshore wind turbines. Simulation results based on a GH Bladed platform further validates the analysis. Second, in order to reduce the joint impacts of the wave, wind shear and tower shadow on the wind turbine, a variable pitch control method is proposed. The integrated tower top vibration acceleration signal is superimposed on the collective pitch reference signal, then the triple frequency (3P) fluctuating component of the wind turbine output power and the azimuth angle of each blade are converted into the pitch angle adjustment signal of each blade, which is superimposed on the collective pitch signal for individual pitch control. The simulation results show that the proposed pitch control strategy can effectively smooth the fluctuation of blade root flap-wise load caused by wind and wave, and significantly reduce the fluctuation of aerodynamic torque and output power of offshore wind turbines. |
| Databáze: | OpenAIRE |
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