Articles | Volume 6, issue 1
https://doi.org/10.5194/wes-6-61-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-6-61-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Parameterization of wind evolution using lidar
Stuttgart Wind Energy (SWE), Institute of Aircraft Design, University of Stuttgart, Allmandring 5b, 70569 Stuttgart, Germany
David Schlipf
Wind Energy Technology Institute, Flensburg University of Applied Sciences, Kanzleistraße 91–93, 24943 Flensburg, Germany
Po Wen Cheng
Stuttgart Wind Energy (SWE), Institute of Aircraft Design, University of Stuttgart, Allmandring 5b, 70569 Stuttgart, Germany
Related authors
Yiyin Chen, Feng Guo, David Schlipf, and Po Wen Cheng
Wind Energ. Sci., 7, 539–558, https://doi.org/10.5194/wes-7-539-2022, https://doi.org/10.5194/wes-7-539-2022, 2022
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Lidar-assisted control of wind turbines requires a wind field generator capable of simulating wind evolution. Out of this need, we extend the Veers method for 3D wind field generation to 4D and propose a two-step Cholesky decomposition approach. Based on this, we develop a 4D wind field generator – evoTurb – coupled with TurbSim and Mann turbulence generator. We further investigate the impacts of the spatial discretization in 4D wind fields on lidar simulations to provide practical suggestions.
Moritz Gräfe, Vasilis Pettas, Nikolay Dimitrov, and Po Wen Cheng
Wind Energ. Sci., 9, 2175–2193, https://doi.org/10.5194/wes-9-2175-2024, https://doi.org/10.5194/wes-9-2175-2024, 2024
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This study explores a methodology using floater motion and nacelle-based lidar wind speed measurements to estimate the tension and damage equivalent loads (DELs) on floating offshore wind turbines' mooring lines. Results indicate that fairlead tension time series and DELs can be accurately estimated from floater motion time series. Using lidar measurements as model inputs for DEL predictions leads to similar accuracies as using displacement measurements of the floater.
Mohammad Youssef Mahfouz, Ericka Lozon, Matthew Hall, and Po Wen Cheng
Wind Energ. Sci., 9, 1595–1615, https://doi.org/10.5194/wes-9-1595-2024, https://doi.org/10.5194/wes-9-1595-2024, 2024
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As climate change increasingly impacts our daily lives, a transition towards cleaner energy is needed. With all the growth in floating offshore wind and the planned floating wind farms (FWFs) in the next few years, we urgently need new techniques and methodologies to accommodate the differences between the fixed bottom and FWFs. This paper presents a novel methodology to decrease aerodynamic losses inside an FWF by passively relocating the downwind floating wind turbines out of the wakes.
Fiona Dominique Lüdecke, Martin Schmid, and Po Wen Cheng
Wind Energ. Sci., 9, 1527–1545, https://doi.org/10.5194/wes-9-1527-2024, https://doi.org/10.5194/wes-9-1527-2024, 2024
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Large direct-drive wind turbines, with a multi-megawatt power rating, face design challenges. Moving towards a more system-oriented design approach could potentially reduce mass and costs. Exploiting the full design space, though, may invoke interaction mechanisms, which have been neglected in the past. Based on coupled simulations, this work derives a better understanding of the electro-mechanical interaction mechanisms and identifies potential for design relevance.
Qi Pan, Dexing Liu, Feng Guo, and Po Wen Cheng
Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2024-44, https://doi.org/10.5194/wes-2024-44, 2024
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The floating wind market is striving to scale up from a handful of prototypes to gigawatt-scale capacity, despite facing barriers of high costs in the deep-sea deployment. Shared mooring is promising in reducing material costs. This paper introduces a comprehensive design methodology for reliable shared mooring line configurations, and reveals their potential for cost-saving and power enhancement. These findings contribute to achieving cost-effective solutions for floating wind farms.
Wei Yu, Sheng Tao Zhou, Frank Lemmer, and Po Wen Cheng
Wind Energ. Sci., 9, 1053–1068, https://doi.org/10.5194/wes-9-1053-2024, https://doi.org/10.5194/wes-9-1053-2024, 2024
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Integrating a tuned liquid multi-column damping (TLMCD) into a floating offshore wind turbine (FOWT) is challenging. The synergy between the TLMCD, the turbine controller, and substructure dynamics affects the FOWT's performance and cost. A control co-design optimization framework is developed to optimize the substructure, the TLMCD, and the blade pitch controller simultaneously. The results show that the optimization can significantly enhance FOWT system performance.
Christian W. Schulz, Stefan Netzband, Umut Özinan, Po Wen Cheng, and Moustafa Abdel-Maksoud
Wind Energ. Sci., 9, 665–695, https://doi.org/10.5194/wes-9-665-2024, https://doi.org/10.5194/wes-9-665-2024, 2024
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Understanding the underlying physical phenomena of the aerodynamics of floating offshore wind turbines (FOWTs) is crucial for successful simulations. No consensus has been reached in the research community on which unsteady aerodynamic phenomena are relevant and how much they can influence the loads acting on a FOWT. This work contributes to the understanding and characterisation of such unsteady phenomena using a novel experimental approach and comprehensive numerical investigations.
Zhaoyu Zhang, Feng Guo, David Schlipf, Paolo Schito, and Alberto Zasso
Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2023-162, https://doi.org/10.5194/wes-2023-162, 2024
Preprint withdrawn
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This paper aims to analyse the uncertainty in wind direction estimation of LIDAR and to improve the estimation accuracy. Findings demonstrate that this LIDAR estimation method is insufficient to supervise the turbine yaw control system in terms of both accuracy and timeliness. Future research should apply more advanced wind flow models to explore more accurate wind field reconstruction methods.
Wei Fu, Feng Guo, David Schlipf, and Alfredo Peña
Wind Energ. Sci., 8, 1893–1907, https://doi.org/10.5194/wes-8-1893-2023, https://doi.org/10.5194/wes-8-1893-2023, 2023
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A high-quality preview of the rotor-effective wind speed is a key element of the benefits of feedforward pitch control. We model a one-beam lidar in the spinner of a 15 MW wind turbine. The lidar rotates with the wind turbine and scans the inflow in a circular pattern, mimicking a multiple-beam lidar at a lower cost. We found that a spinner-based one-beam lidar provides many more control benefits than the one on the nacelle, which is similar to a four-beam nacelle lidar for feedforward control.
Feng Guo and David Schlipf
Wind Energ. Sci., 8, 1299–1317, https://doi.org/10.5194/wes-8-1299-2023, https://doi.org/10.5194/wes-8-1299-2023, 2023
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This paper assesses lidar-assisted collective pitch feedforward (LACPF) and multi-variable feedback (MVFB) controls for the IEA 15.0 MW reference turbine. The main contributions of this work include (a) optimizing a four-beam pulsed lidar for a large turbine, (b) optimal tuning of speed regulation gains and platform feedback gains for the MVFB and LACPF controllers, and (c) assessing the benefits of the two control strategies using realistic offshore turbulence spectral characteristics.
Moritz Gräfe, Vasilis Pettas, Julia Gottschall, and Po Wen Cheng
Wind Energ. Sci., 8, 925–946, https://doi.org/10.5194/wes-8-925-2023, https://doi.org/10.5194/wes-8-925-2023, 2023
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Inflow wind field measurements from nacelle-based lidar systems offer great potential for different applications including turbine control, load validation and power performance measurements. On floating wind turbines nacelle-based lidar measurements are affected by the dynamic behavior of the floating foundations. Therefore, the effects on lidar wind speed measurements induced by floater dynamics must be well understood. A new model for quantification of these effects is introduced in our work.
Feng Guo, David Schlipf, and Po Wen Cheng
Wind Energ. Sci., 8, 149–171, https://doi.org/10.5194/wes-8-149-2023, https://doi.org/10.5194/wes-8-149-2023, 2023
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The benefits of lidar-assisted control are evaluated using both the Mann model and Kaimal model-based 4D turbulence, considering the variation of turbulence parameters. Simulations are performed for the above-rated mean wind speed, using the NREL 5.0 MW reference wind turbine and a four-beam lidar system. Using lidar-assisted control reduces the variations in rotor speed, pitch rate, tower base fore–aft bending moment, and electrical power significantly.
Yiyin Chen, Feng Guo, David Schlipf, and Po Wen Cheng
Wind Energ. Sci., 7, 539–558, https://doi.org/10.5194/wes-7-539-2022, https://doi.org/10.5194/wes-7-539-2022, 2022
Short summary
Short summary
Lidar-assisted control of wind turbines requires a wind field generator capable of simulating wind evolution. Out of this need, we extend the Veers method for 3D wind field generation to 4D and propose a two-step Cholesky decomposition approach. Based on this, we develop a 4D wind field generator – evoTurb – coupled with TurbSim and Mann turbulence generator. We further investigate the impacts of the spatial discretization in 4D wind fields on lidar simulations to provide practical suggestions.
Vasilis Pettas, Matthias Kretschmer, Andrew Clifton, and Po Wen Cheng
Wind Energ. Sci., 6, 1455–1472, https://doi.org/10.5194/wes-6-1455-2021, https://doi.org/10.5194/wes-6-1455-2021, 2021
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This study aims to quantify the effect of inter-farm interactions based on long-term measurement data from the Alpha Ventus (AV) wind farm and the nearby FINO1 platform. AV was initially the only operating farm in the area, but in subsequent years several farms were built around it. This setup allows us to quantify the farm wake effects on the microclimate of AV and also on turbine loads and operational characteristics depending on the distance and size of the neighboring farms.
Matthias Kretschmer, Jason Jonkman, Vasilis Pettas, and Po Wen Cheng
Wind Energ. Sci., 6, 1247–1262, https://doi.org/10.5194/wes-6-1247-2021, https://doi.org/10.5194/wes-6-1247-2021, 2021
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We perform a validation of the new simulation tool FAST.Farm for the prediction of power output and structural loads in single wake conditions with respect to measurement data from the offshore wind farm alpha ventus. With a new wake-added turbulence functionality added to FAST.Farm, good agreement between simulations and measurements is achieved for the considered quantities. We hereby give insights into load characteristics of an offshore wind turbine subjected to single wake conditions.
Cited articles
Bossanyi, E.: Un-freezing the turbulence: Application to LiDAR-assisted wind
turbine control, IET Renewable Power Generation, 7, 321–329,
https://doi.org/10.1049/iet-rpg.2012.0260, 2013. a
Breiman, L., Friedman, J., Stone, C. J., and Olshen, R.: Classification and
regression trees, CRC Press, Boca Raton, FL, 1984. a
Businger, J. A., Wyngaard, J. C., Izumi, Y., and Bradley, E. F.: Flux-Profile
Relationships in the Atmospheric Surface Layer, J. Atmos.
Sci., 28, 181–189,
https://doi.org/10.1175/1520-0469(1971)028<0181:FPRITA>2.0.CO;2, 1971. a
Chen, Y.: Parameterization of wind evolution model using lidar measurement,
Zenodo, https://doi.org/10.5281/zenodo.3366119, 2019. a, b
Davenport, A. G.: The spectrum of horizontal gustiness near the ground in high
winds, Q. J. Roy. Meteorol. Soc., 87, 194–211,
https://doi.org/10.1002/qj.49708737208, 1961. a, b
Davoust, S. and von Terzi, D.: Analysis of wind coherence in the longitudinal
direction using turbine mounted lidar, J. Phys. Conf. Ser.,
753, 072005, https://doi.org/10.1088/1742-6596/753/7/072005, 2016. a
de Maré, M. and Mann, J.: On the Space-Time Structure of Sheared
Turbulence, Bound.-Lay. Meteorol., 160, 453–474,
https://doi.org/10.1007/s10546-016-0143-z, 2016. a
Duvenaud, D.: Automatic model construction with Gaussian processes, Apollo –
university of cambridge repository, University of Cambridge, Cambridge, UK,
https://doi.org/10.17863/CAM.14087, 2014. a, b, c
Fritsch, F. N. and Carlson, R. E.: Monotone Piecewise Cubic Interpolation, SIAM
J. Numer. Anal., 17, 238–246, https://doi.org/10.1137/0717021, 1980. a
Hocking, R. R.: The Analysis and Selection of Variables in Linear Regression,
Biometrics, 32, 1–49, https://doi.org/10.2307/2529336, 1976. a
Joanes, D. N. and Gill, C. A.: Comparing measures of sample skewness and
kurtosis, J. Roy. Stat. Soc. D-Stat., 47, 183–189, https://doi.org/10.1111/1467-9884.00122, 1998. a, b
Kelberlau, F. and Mann, J.: Better turbulence spectra from velocity–azimuth display scanning wind lidar, Atmos. Meas. Tech., 12, 1871–1888, https://doi.org/10.5194/amt-12-1871-2019, 2019. a
Kreyszig, E.: Advanced engineering mathematics, Wiley, New York and Chichester,
4th edn., 1979. a
Laks, J., Simley, E., and Pao, L.: A spectral model for evaluating the effect
of wind evolution on wind turbine preview control, in: 2013 American Control
Conference, IEEE, 3673–3679, https://doi.org/10.1109/ACC.2013.6580400,2013. a
Lenschow, D. H., Mann, J., and Kristensen, L.: How Long Is Long Enough When
Measuring Fluxes and Other Turbulence Statistics?, J. Atmos. Ocean. Techn., 11, 661–673,
https://doi.org/10.1175/1520-0426(1994)011<0661:HLILEW>2.0.CO;2, 1994. a
Levenberg, K.: A method for the solution of certain non-linear problems in
least squares, Q. Appl. Math., 2, 164–168,
https://doi.org/10.1090/qam/10666, 1944. a, b
Liu, Z., Barlow, J. F., Chan, P.-W., Fung, J. C. H., Li, Y., Ren, C., Mak, H.
W. L., and Ng, E.: A Review of Progress and Applications of Pulsed Doppler
Wind LiDARs, Remote Sensing, 11, 2522, https://doi.org/10.3390/rs11212522, 2019. a
Lumley, J. L. and Panofsky, H. A.: The structure of atmospheric turbulence.,
Interscience Publishers, Wiley & Sons, New York, 1st edn.,
https://doi.org/10.1002/qj.49709138926, 1964. a, b, c
Mann, J.: The spatial structure of neutral atmospheric surface-layer
turbulence, J. Fluid Mech., 273, 141,
https://doi.org/10.1017/S0022112094001886, 1994. a
Marquardt, D. W.: An Algorithm for Least-Squares Estimation of Nonlinear
Parameters, J. Soc. Ind. Appl. Math.,
11, 431–441, https://doi.org/10.1137/0111030, 1963. a, b
Mendenhall, W. and Sincich, T.: Statistics for engineering and the sciences,
Pearson Prentice Hall, Upper Saddle River, N.J., 5th edn., 2007. a
Moré, J. J.: The Levenberg-Marquardt Algorithm: Implementation and Theory,
edited by: Watson, G. A., Numerical Analysis, 630, 105–116,
https://doi.org/10.1007/BFb0067700, 1978. a, b
Obukhov, A. M.: Turbulence in an atmosphere with a non-uniform temperature,
Bound.-Lay. Meteorol., 2, 7–29, https://doi.org/10.1007/BF00718085, 1971. a
Panofsky, H. A. and McCormick, R. A.: Properties of spectra of atmospheric
turbulence at 100 metres, Q. J. Roy. Meteor.
Soc., 80, 546–564, https://doi.org/10.1002/qj.49708034604, 1954. a
Panofsky, H. A. and Mizuno, T.: Horizontal coherence and Pasquill's beta,
Bound.-Lay. Meteorol., 9, 247–256, https://doi.org/10.1007/BF00230769, 1975. a, b, c
Panofsky, H. A., Thomson, D. W., Sullivan, D. A., and Moravek, D. E.: Two-point
velocity statistics over Lake Ontario, Bound.-Lay. Meteorol., 7,
309–321, https://doi.org/10.1007/BF00240834, 1974. a
Peña, A., Hasager, C., Lange, J., Anger, J., Badger, M., Bingöl, F.,
Bischoff, O., Cariou, J.-P., Dunne, F., Emeis, S., Harris, M., Hofsäss,
M., Karagali, I., Laks, J., Larsen, S., Mann, J., Mikkelsen, T., Pao, L.,
Pitter, M., Rettenmeier, A., Sathe, A., Scanzani, F., Schlipf, D., Simley,
E., Slinger, C., Wagner, R., and Würth, I.: Remote Sensing for Wind
Energy, no. 0029(EN) in DTU Wind Energy E, DTU Wind Energy, Denmark, 2013. a
Pope, S. B.: Turbulent flows, Cambridge University Press, Cambridge and New
York, 2000. a
Ropelewski, C. F., Tennekes, H., and Panofsky, H. A.: Horizontal coherence of
wind fluctuations, Bound.-Lay. Meteorol., 5, 353–363,
https://doi.org/10.1007/BF00155243, 1973. a, b, c, d
Sathe, A. and Mann, J.: Measurement of turbulence spectra using scanning pulsed
wind lidars, J. Geophys. Res.-Atmos., 117, D01201,
https://doi.org/10.1029/2011JD016786, 2012. a
Schlipf, D., Trabucchi, D., Bischoff, O., Hofsäß, M., Mann, J.,
Mikkelsen, T., Rettenmeier, A., Trujillo, J. J., and Kühn, M.: Testing of
frozen turbulence hypothesis for wind turbine applications with a scanning
LIDAR system, OPUS – Publication Server of the University of Stuttgart, https://doi.org/10.18419/opus-3915, 2011. a
Shannon, C. E.: Communication in the Presence of Noise, P.
IRE, 37, 10–21, https://doi.org/10.1109/JRPROC.1949.232969, 1949. a
Simley, E.: Wind Speed Preview Measurement and Estimation for Feedforward
Control of Wind Turbines, ProQuest Dissertations & Theses, PhD dissertation, University of Colorado,
Ann Arbor,
2015. a
Simley, E., Fürst, H., Haizmann, F., and Schlipf, D.: Optimizing Lidars for
Wind Turbine Control Applications – Results from the IEA Wind Task 32
Workshop, Remote Sensing, 10, 863, https://doi.org/10.3390/rs10060863, 2018. a
Vapnik, V. N.: The Nature of Statistical Learning Theory, Springer New York,
New York, NY, 1995. a
Weitkamp, C.: Lidar: Range-Resolved Optical Remote Sensing of the Atmosphere,
vol. 102, Springer-Verlag, New York, https://doi.org/10.1007/b106786, 2005. a, b
Willis, G. E. and Deardorff, J. W.: On the use of Taylor's translation
hypothesis for diffusion in the mixed layer, Q. J. Roy.
Meteorol. Soc., 102, 817–822, https://doi.org/10.1002/qj.49710243411, 1976. a, b
Würth, I., Ellinghaus, S., Wigger, M., Niemeier, M. J., Clifton, A., and
Cheng, P. W.: Forecasting wind ramps: Can long-range lidar increase
accuracy?, J. Phys. Conf. Ser., 1102, 012013,
https://doi.org/10.1088/1742-6596/1102/1/012013, 2018. a
Short summary
Wind evolution is currently of high interest, mainly due to the development of lidar-assisted wind turbine control (LAC). Moreover, 4D stochastic wind field simulations can be made possible by integrating wind evolution into 3D simulations to provide a more realistic simulation environment for LAC. Motivated by these factors, we investigate the potential of Gaussian process regression in the parameterization of a two-parameter wind evolution model using data of two nacelle-mounted lidars.
Wind evolution is currently of high interest, mainly due to the development of lidar-assisted...
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