Recently,semisubmersible floating offshore wind turbine technologies have received considerable attention.For the coupled simulation of semisubmersible floating offshore wind energy,the platform is usually considered ...Recently,semisubmersible floating offshore wind turbine technologies have received considerable attention.For the coupled simulation of semisubmersible floating offshore wind energy,the platform is usually considered a rigid model,which could affect the calculation accuracy of the dynamic responses.The dynamic responses of a TripleSpar floating offshore wind turbine equipped with a 10 MW offshore wind turbine are discussed herein.The simulation of a floating offshore wind turbine under regular waves,white noise waves,and combined wind-wave conditions is conducted.The effects of the tower and platform flexibility on the motion and force responses of the TripleSpar semisubmersible floating offshore wind turbine are investigated.The results show that the flexibility of the tower and platform can influence the dynamic responses of a TripleSpar semisubmersible floating offshore wind turbine.Considering the flexibility of the tower and platform,the tower and platform pitch motions markedly increased compared with the fully rigid model.Moreover,the force responses,particularly for tower base loads,are considerably influenced by the flexibility of the tower and platform.Thus,the flexibility of the tower and platform for the coupled simulation of floating offshore wind turbines must be appropriately examined.展开更多
Numerical investigations of floating platforms with different outer column inclined angles under two operating conditions of regular wave and irregular wave are presented in this paper.A coupled aero-hydrodynamic comp...Numerical investigations of floating platforms with different outer column inclined angles under two operating conditions of regular wave and irregular wave are presented in this paper.A coupled aero-hydrodynamic computational fluid dynamics in-house solver FOWT-UALM-SJTU is applied for the calculation.First,the validation for wave and wind generation are conducted to determine mesh distribution strategy.Based on these,the hydrodynamic motion response,aerodynamic performance and wake flow are analyzed to explore the impact of inclined angle.Conduct spectral analysis on the motion response under wave action,discuss the aerodynamic attack angle and inflow wind velocity along the blade spanwise direction in detail,reveal different trends in wake development and recovery.The results show that for the regular wave condition with the increase of inclined angles,the equilibrium position of surge motion is constantly rising,while pitch is decreasing.The maximum root mean square(rms)value occurs at angle=30°,compared with the original OC4 FOWT,the rms in power and thrust increase 0.35%,0.71%.And there are two low regions of attack angle and high regions of axial inflow velocity,corresponding to aerodynamic loads.The spectral analysis indicates that the natural frequency of pitch motion will increase with inclined angle.Besides,from the middle to far region of wake flow,the velocity recovery of FOWT with inclined angle will become faster,which is beneficial for downstream turbines to enhance more wind energy.展开更多
大规模风力发电并网已经是新能源发展的必然趋势,但由于风能的不确定性以及风电机组自身特性,风机输出功率波动性较大。在传统的最大风能追踪控制策略(maximum power point tracking,MPPT)的基础上提出了一种在全风速范围内转子动能控...大规模风力发电并网已经是新能源发展的必然趋势,但由于风能的不确定性以及风电机组自身特性,风机输出功率波动性较大。在传统的最大风能追踪控制策略(maximum power point tracking,MPPT)的基础上提出了一种在全风速范围内转子动能控制和变桨距控制相结合的功率平滑控制策略,在实验室开发的风力发电机组半物理实时仿真平台上进行仿真研究,结果表明,与传统的MPPT相比,该功率平滑控制策略可以明显减小风机的输出功率波动,提高电能质量。展开更多
基金funded by the Key Technology Research and Development Program(Nos.2022YFB4201301,and 2022YFB4201304)the National Natural Science Foundation of China(Nos.52101333,52071058,51939002,and 52071301)+2 种基金the Zhejiang Provincial Natural Science Foundation of China(No.LQ21E090009)supported by the Natural Science Foundation of Liaoning Province(No.2022-KF-18-01)the special funds for Promoting High-Quality Development from the Department of Natural Resources of Guangdong Province(No.GDNRC[2020]016).
文摘Recently,semisubmersible floating offshore wind turbine technologies have received considerable attention.For the coupled simulation of semisubmersible floating offshore wind energy,the platform is usually considered a rigid model,which could affect the calculation accuracy of the dynamic responses.The dynamic responses of a TripleSpar floating offshore wind turbine equipped with a 10 MW offshore wind turbine are discussed herein.The simulation of a floating offshore wind turbine under regular waves,white noise waves,and combined wind-wave conditions is conducted.The effects of the tower and platform flexibility on the motion and force responses of the TripleSpar semisubmersible floating offshore wind turbine are investigated.The results show that the flexibility of the tower and platform can influence the dynamic responses of a TripleSpar semisubmersible floating offshore wind turbine.Considering the flexibility of the tower and platform,the tower and platform pitch motions markedly increased compared with the fully rigid model.Moreover,the force responses,particularly for tower base loads,are considerably influenced by the flexibility of the tower and platform.Thus,the flexibility of the tower and platform for the coupled simulation of floating offshore wind turbines must be appropriately examined.
基金Project supported by the National Natural Science Foundation of China (Grant No.52131102).
文摘Numerical investigations of floating platforms with different outer column inclined angles under two operating conditions of regular wave and irregular wave are presented in this paper.A coupled aero-hydrodynamic computational fluid dynamics in-house solver FOWT-UALM-SJTU is applied for the calculation.First,the validation for wave and wind generation are conducted to determine mesh distribution strategy.Based on these,the hydrodynamic motion response,aerodynamic performance and wake flow are analyzed to explore the impact of inclined angle.Conduct spectral analysis on the motion response under wave action,discuss the aerodynamic attack angle and inflow wind velocity along the blade spanwise direction in detail,reveal different trends in wake development and recovery.The results show that for the regular wave condition with the increase of inclined angles,the equilibrium position of surge motion is constantly rising,while pitch is decreasing.The maximum root mean square(rms)value occurs at angle=30°,compared with the original OC4 FOWT,the rms in power and thrust increase 0.35%,0.71%.And there are two low regions of attack angle and high regions of axial inflow velocity,corresponding to aerodynamic loads.The spectral analysis indicates that the natural frequency of pitch motion will increase with inclined angle.Besides,from the middle to far region of wake flow,the velocity recovery of FOWT with inclined angle will become faster,which is beneficial for downstream turbines to enhance more wind energy.
文摘大规模风力发电并网已经是新能源发展的必然趋势,但由于风能的不确定性以及风电机组自身特性,风机输出功率波动性较大。在传统的最大风能追踪控制策略(maximum power point tracking,MPPT)的基础上提出了一种在全风速范围内转子动能控制和变桨距控制相结合的功率平滑控制策略,在实验室开发的风力发电机组半物理实时仿真平台上进行仿真研究,结果表明,与传统的MPPT相比,该功率平滑控制策略可以明显减小风机的输出功率波动,提高电能质量。
