Experimental and numerical study of a 10MW TLP wind turbine in waves and wind

Pegalajar‐Jurado, Antonio; Hansen, Anders Melchior; Laugesen, Robert; Mikkelsen, Robert Flemming; Borg, Michael; Kim, Taeseong; Heilskov, Nicolai F.; Bredmose, Henrik

doi:10.1088/1742-6596/753/9/092007

Cited by 18 publications

(16 citation statements)

References 2 publications

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“…As the physical testing of FOWTs is relatively new, a standardised approach has yet to emerge and thus a quantification of experimental uncertainty is often absent from the relevant literature. For example, in [8][9][10][11], experimental uncertainty was not addressed, whilst in [12][13][14][15][16][17], comparisons between numerical and physical data were presented, which can be considered a measure of experimental accuracy, but with no assessment of experimental precision.…”

Section: Uncertainty Assessmentmentioning

confidence: 99%

Uncertainty in the Physical Testing of Floating Wind Energy Platforms’ Accuracy versus Precision

2019

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This paper examines the impact on experimental uncertainty of introducing aerodynamic and rotor gyroscopic loading on a model multirotor floating wind energy platform during physical testing. In addition, a methodology and a metric are presented for the assessment of the uncertainty across the full time series for the response of a floating wind energy platform during wave basin testing. It is shown that there is a significant cost incurred in terms of experimental uncertainty through the addition of rotor thrust in the laboratory environment for the considered platform. A slight reduction in experimental uncertainty is observed through the introduction of gyroscopic rotor loading for most platform responses.

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Section: Uncertainty Assessmentmentioning

confidence: 99%

Uncertainty in the Physical Testing of Floating Wind Energy Platforms’ Accuracy versus Precision

2019

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“…The properties of the components of the present test setup were verified and identified with different methods. For the ro-tor, a Blade Element Momentum Theory (BEM) model was set up with the polars calculated by DTU [7] and the torque and thrust for different Tip-Speed Ratios (TSR) compared to the measurements, as shown in [6]. The tower structural properties were determined for a fixed configuration already for a previous test by DTU, see [7].…”

Section: Scaling and Test Setupmentioning

confidence: 99%

“…First results have been published already in [5] and [6]. A study with the same wind turbine and a higherfidelity model was shown in [7]. A common methodology in other FOWT experiments was to maintain the rotor speed through a servo, actuating the torque.…”

Section: Introductionmentioning

confidence: 99%

The TripleSpar Campaign: Validation of a Reduced-Order Simulation Model for Floating Wind Turbines

Lemmer

Cheng

et al. 2018

Volume 10: Ocean Renewable Energy

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Different research groups have recently tested scaled floating offshore wind turbines including blade pitch control. A test conducted by the University of Stuttgart (Germany), DTU (Denmark) and CENER (Spain) at the Danish Hydraulic Institute (DHI) in 2016 successfully demonstrated a real-time blade pitch controller on the public 10MW TripleSpar semi-submersible concept at a scale of 1/60. In the presented work a reduced-order simulation model including control is compared against the model tests. The model has only five degrees of freedom and is formulated either in the time-domain or in the frequency-domain. In a first step the Morison drag coefficients are identified from decay tests as well as irregular wave cases. The identified drag coefficients depend clearly on the sea state, with the highest ones for the decay tests and small sea states. This is an important finding, for example for the design of a robust controller, which depends on the system damping. It is shown that the simplified model can well represent the dominant physical effects of the coupled system with a substantially reduced simulation time, compared to state-of-the-art models.

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“…Surge and pitch motions are the most important in the six motions of rigid-body floating platforms because they dominate the dynamic response of the system. The experimental data of the DTU 10 MW reference wind turbine scaling model was used to test and verify the simulation results of the surge free decay motion [41]. All the experimental results were extrapolated to the full size.…”

Section: Validationmentioning

confidence: 99%

Stochastic Dynamic Response Analysis of a 10 MW Tension Leg Platform Floating Horizontal Axis Wind Turbine

et al. 2018

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The dynamic response of floating horizontal axis wind turbines (FHWATs) are affected by the viscous and inertia effects. In free decay motion, viscous drag reduces the amplitude of pitch and roll fluctuation, the quasi-static mooring system overestimates the resonant amplitude values of pitch and roll. In this paper, the quasi-static mooring system is modified by introducing linear damping and quadratic damping. The dynamic response characteristics of the FHAWT modified model of the DTU 10 MW tension leg platform (TLP) were studied. Dynamic response of the blade was mainly caused by wind load, while the wave increased the blade short-term damage equivalent load. The tower base bending moment was affected by inclination of the tower and the misaligned angle βwave between wind and wave. Except the yaw motion, other degrees of freedom motions of the TLP were substantially affected by βwave. Ultimate tension of the mooring system was related to the displacement caused by pitch and roll motions, and standard deviation of the tension was significantly affected by the wave frequency response. Under the action of wave load, the viscous drag would stimulate the mooring system and increase the resonance of the platform motion.

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Experimental and numerical study of a 10MW TLP wind turbine in waves and wind

Cited by 18 publications

References 2 publications

Uncertainty in the Physical Testing of Floating Wind Energy Platforms’ Accuracy versus Precision

Uncertainty in the Physical Testing of Floating Wind Energy Platforms’ Accuracy versus Precision

The TripleSpar Campaign: Validation of a Reduced-Order Simulation Model for Floating Wind Turbines

Stochastic Dynamic Response Analysis of a 10 MW Tension Leg Platform Floating Horizontal Axis Wind Turbine

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