Experimental Study for SPAR Type Floating Offshore Wind Turbine With Blade-Pitch Control

Chujo, Toshiki; Minami, Yoshimasa; Nimura, Tadashi; Ishida, Shigemi

doi:10.1115/omae2013-10649

Cited by 12 publications

(9 citation statements)

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“…Several generations of "thrust-scaled blades" have been applied in wave basins [132,134,135]. These blades are designed with modified chord and airfoil shape, while maintaining tip speed ratio and mass distribution, to obtain correct Froude-scaled thrust forces (Figs.…”

Section: Physical Testingmentioning

confidence: 99%

Recent Advances in Integrated Response Analysis of Floating Wind Turbines in a Reliability Perspective

Moan

Gao

Bachynski

et al. 2020

Journal of Offshore Mechanics and Arctic Engineering

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Offshore wind provides an important source of renewable energy. While wind turbines fixed to the seabed in shallow water have already been industrialized, floating wind turbines are still at an early stage of development. The cost of wind power is decreasing fast. Yet, the main challenges, especially for novel floating wind turbine concepts, are to increase reliability and reduce costs. The reliability perspective here refers to the lifecycle integrity management of the system to ensure reliability by actions during design, fabrication, installation, operation, and decommissioning. The assessment should be based on response analysis that properly accounts for the effect of different sub-systems (rotor, drivetrain, tower, support structure, and mooring) on the system behavior. Moreover, the load effects should be determined so as to be proper input to the integrity check of these sub-systems. The response analysis should serve as the basis for design and managing inspections and monitoring, with due account of inherent uncertainties. In this paper, recent developments of methods for numerical and experimental response assessment of floating wind turbines are briefly described in view of their use to demonstrate system integrity in design as well as during operation to aid inspection and monitoring. Typical features of offshore wind turbine behavior are also illustrated through some numerical case studies.

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Section: Physical Testingmentioning

confidence: 99%

Recent Advances in Integrated Response Analysis of Floating Wind Turbines in a Reliability Perspective

Moan

Gao

Bachynski

et al. 2020

Journal of Offshore Mechanics and Arctic Engineering

View full text Add to dashboard Cite

show abstract

“…In 2010, one half-scale and one full-scale semi-type FOWTs were demonstrated in Japan (Ishida et al 2013). The MOE Project (Figure 3) was the first grid-connected FOWT in Japan (100-kW half-scale model) and the fullscale FOWT has also been installed (2 MW).…”

Section: On-site Measurementsmentioning

confidence: 99%

“…Utsunomiya et al (2013a, b) also compared the numerical calculations. In summary, full-scale tests have been conducted at the ocean (Ishida et al, 2013;Utsunomiya et al 2013a, b) and the derivation of their numerical model was provided by Matsukuma and Utsunomiya (2008).…”

Section: Progress Of Model Tests On Fowtsmentioning

confidence: 99%

“…The OrcaFlex software has been applied to the numerical modelling analysis. Later, Chujo et al (2013) conducted a basin test, based on the Fukushima project (Forward 2014) with various phases including model and prototype tests as well as the blade pitch control. Continue to part of the work of Duan et al (2016a, b), several studies on FOWTs are summarized in Tables 3 and 4.…”

Section: Progress Of Model Tests On Fowtsmentioning

confidence: 99%

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Review of Experimental-Numerical Methodologies and Challenges for Floating Offshore Wind Turbines

Chen

2020

J. Marine. Sci. Appl.

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Due to the dissimilar scaling issues, the conventional experimental method of FOWTs can hardly be used directly to validate the full-scale global dynamic responses accurately. Therefore, it is of absolute necessity to find a more accurate, economic and efficient approach, which can be utilized to predict the full-scale global dynamic responses of FOWTs. In this paper, a literature review of experimental-numerical methodologies and challenges for FOWTs is made. Several key challenges in the conventional basin experiment issues are discussed, including scaling issues; coupling effects between aero-hydro and structural dynamic responses; blade pitch control strategies; experimental facilities and calibration methods. Several basin experiments, industrial projects and numerical codes are summarized to demonstrate the progress of hybrid experimental methods. Besides, time delay in hardware-in-the-loop challenges is concluded to emphasize their significant role in real-time hybrid approaches. It is of great use to comprehend these methodologies and challenges, which can help some future researchers to make a footstone for proposing a more efficient and functional hybrid basin experimental and numerical method.

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“…Bagherieh and Nagamune developed a linear parameter varying controller for FOWT with a barge platform, which is a gain‐scheduled scheme with respect to the wind speed. Chujo et al conduct experimental study on blade pitch control for a lab‐scale FOWT with a spar buoy floater, while Skaare et al reported field test for the Hywind Demo FOWT under different pitch control schemes.…”

Section: Introductionmentioning

confidence: 99%

Active vertical vane control for stabilizing platform roll motion of floating offshore turbines

Yang

2018

Wind Energy

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For floating offshore wind turbines, control of the platform roll motion is important for performance, load, and structural stability. This paper proposes an active control strategy for stabilizing the platform roll motion of downwind wind turbine via a vertical vane installed underneath the nacelle bedplate. The aerodynamic lift induced by the vertical vane from the incoming wind renders a lateral force imposed on the tower top, which leads to a significant stabilizing torque on the platform via the tower height as moment arm. Such control authority can be manipulated by the vane pitch angle.The proposed idea is evaluated with a 5 MW turbine model combined with the Hywind platform, using the Fatigue, Aerodynamics, Structures, and Turbulence software. The vane models are implemented based on slight modification of the tail furling module in Fatigue, Aerodynamics, Structures, and Turbulence. Simulation study is performed under different feedback measurements, vane areas, airfoil designs, wind speeds, wave heights, wind directions, and wave directions. The feedback of tower-top velocity feedback is shown to be more effective than the acceleration feedback. For all cases, the variance of platform roll angle shows reduction of approximately 73% to 95%, the damage equivalent load for the tower-base side-to-side bending moment can be reduced by 20% to 61%, and the power consumption of vane actuator is up to 0.075% of the turbine power generated during the simulated periods. The proposed actuation scheme promises a low-power and high-bandwidth solution to floating offshore wind turbines roll motion stabilization, more advantageous especially for higher winds when the structural stability is of greater concern. KEYWORDS active control, airfoil, offshore floating wind turbine, platform roll, vertical vane actuator 1 | INTRODUCTION Compared with onshore wind power, offshore wind power has advantages including higher wind with less turbulence, reduced transmission cost due to proximity to load centers, and relief from the pressure of land scarcity. 1 The offshore wind turbines that have been installed so far are mostly deployed in shallow water on piles or gravity-based substructures. For water depths from 20 to 60 m, various designs of tripod and jacket structures have been proposed. 2 Visual and noise annoyance of nearshore wind turbine operation has motivated the development of deep-water Nomenclature: A=, vane area; C m =, pitching moment coefficients of airfoils; J=, the inertial moment of vertical vane; PI=, proportional-integral; P m =, power supply for vane motor; T aero =, aerodynamic torque of vertical vane; TLCD=, tuned liquid column damper; T m =, torque from vane motor; TMD=, tuned mass-spring damper; α=, angle of attack for vertical vane; ρ=, air density; θ=, pitch angle of vertical vane /journal/we 997 wind power. For deeper water, only floating substructures would be economically justifiable. 3 In addition to reaping more wind power from the advantageous offshore wind resource, the floating offshore wind tur...

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Experimental Study for SPAR Type Floating Offshore Wind Turbine With Blade-Pitch Control

Cited by 12 publications

References 0 publications

Recent Advances in Integrated Response Analysis of Floating Wind Turbines in a Reliability Perspective

Recent Advances in Integrated Response Analysis of Floating Wind Turbines in a Reliability Perspective

Review of Experimental-Numerical Methodologies and Challenges for Floating Offshore Wind Turbines

Active vertical vane control for stabilizing platform roll motion of floating offshore turbines

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