Power curve and wake analyses of the Vestas multi-rotor demonstrator

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Abstract

Numerical simulations of the Vestas multi-rotor demonstrator (4R-V29) are compared with field measurements of power performance and remote sensing measurements of the wake deficit from a short-range WindScanner lidar system. The simulations predict a gain of 0 %–2 % in power due to the rotor interaction at below rated wind speeds. The power curve measurements also show that the rotor interaction increases the power performance below the rated wind speed by 1.8 %, which can result in a 1.5 % increase in the annual energy production. The wake measurements and numerical simulations show four distinct wake deficits in the near wake,which merge into a single-wake structure further downstream. Numerical simulations also show that the wake recovery distance of a simplified 4R-V29 wind turbine is 1.03–1.44 Deq shorter than for an equivalent single-rotor wind turbine with a rotor diameter Deq. In addition, the numerical simulations show that the added wake turbulence of the simplified 4R-V29 wind turbine is lower in the far wake compared with the equivalent single-rotor wind turbine. The faster wake recovery and lower far-wake turbulence of such a multi-rotor wind turbine has the potential to reduce the wind turbine spacing within a wind farm while providing the same production output.
Original languageEnglish
JournalWind Energy Science
Volume4
Issue number2
Pages (from-to)251-271
Number of pages21
ISSN2366-7443
DOIs
Publication statusPublished - 2019

Bibliographical note

This work is distributed under the Creative Commons Attribution 4.0 License.

Cite this

@article{83c62a8ea41c4047a17d24f2fc10745a,
title = "Power curve and wake analyses of the Vestas multi-rotor demonstrator",
abstract = "Numerical simulations of the Vestas multi-rotor demonstrator (4R-V29) are compared with field measurements of power performance and remote sensing measurements of the wake deficit from a short-range WindScanner lidar system. The simulations predict a gain of 0 {\%}–2 {\%} in power due to the rotor interaction at below rated wind speeds. The power curve measurements also show that the rotor interaction increases the power performance below the rated wind speed by 1.8 {\%}, which can result in a 1.5 {\%} increase in the annual energy production. The wake measurements and numerical simulations show four distinct wake deficits in the near wake,which merge into a single-wake structure further downstream. Numerical simulations also show that the wake recovery distance of a simplified 4R-V29 wind turbine is 1.03–1.44 Deq shorter than for an equivalent single-rotor wind turbine with a rotor diameter Deq. In addition, the numerical simulations show that the added wake turbulence of the simplified 4R-V29 wind turbine is lower in the far wake compared with the equivalent single-rotor wind turbine. The faster wake recovery and lower far-wake turbulence of such a multi-rotor wind turbine has the potential to reduce the wind turbine spacing within a wind farm while providing the same production output.",
author = "{van der Laan}, Paul and Andersen, {S{\o}ren Juhl} and {Ramos Garc{\'i}a}, N{\'e}stor and Nikolas Angelou and Georg Pirrung and S{\o}ren Ott and Mikael Sj{\"o}holm and S{\o}rensen, {Kim Hylling} and Neto, {Julio Xavier Vianna} and Kelly, {Mark C.} and Mikkelsen, {Torben Krogh} and Larsen, {Gunner Chr.}",
note = "This work is distributed under the Creative Commons Attribution 4.0 License.",
year = "2019",
doi = "10.5194/wes-4-251-2019",
language = "English",
volume = "4",
pages = "251--271",
journal = "Wind Energy Science",
issn = "2366-7443",
publisher = "Copernicus GmbH",
number = "2",

}

TY - JOUR

T1 - Power curve and wake analyses of the Vestas multi-rotor demonstrator

AU - van der Laan, Paul

AU - Andersen, Søren Juhl

AU - Ramos García, Néstor

AU - Angelou, Nikolas

AU - Pirrung, Georg

AU - Ott, Søren

AU - Sjöholm, Mikael

AU - Sørensen, Kim Hylling

AU - Neto, Julio Xavier Vianna

AU - Kelly, Mark C.

AU - Mikkelsen, Torben Krogh

AU - Larsen, Gunner Chr.

N1 - This work is distributed under the Creative Commons Attribution 4.0 License.

PY - 2019

Y1 - 2019

N2 - Numerical simulations of the Vestas multi-rotor demonstrator (4R-V29) are compared with field measurements of power performance and remote sensing measurements of the wake deficit from a short-range WindScanner lidar system. The simulations predict a gain of 0 %–2 % in power due to the rotor interaction at below rated wind speeds. The power curve measurements also show that the rotor interaction increases the power performance below the rated wind speed by 1.8 %, which can result in a 1.5 % increase in the annual energy production. The wake measurements and numerical simulations show four distinct wake deficits in the near wake,which merge into a single-wake structure further downstream. Numerical simulations also show that the wake recovery distance of a simplified 4R-V29 wind turbine is 1.03–1.44 Deq shorter than for an equivalent single-rotor wind turbine with a rotor diameter Deq. In addition, the numerical simulations show that the added wake turbulence of the simplified 4R-V29 wind turbine is lower in the far wake compared with the equivalent single-rotor wind turbine. The faster wake recovery and lower far-wake turbulence of such a multi-rotor wind turbine has the potential to reduce the wind turbine spacing within a wind farm while providing the same production output.

AB - Numerical simulations of the Vestas multi-rotor demonstrator (4R-V29) are compared with field measurements of power performance and remote sensing measurements of the wake deficit from a short-range WindScanner lidar system. The simulations predict a gain of 0 %–2 % in power due to the rotor interaction at below rated wind speeds. The power curve measurements also show that the rotor interaction increases the power performance below the rated wind speed by 1.8 %, which can result in a 1.5 % increase in the annual energy production. The wake measurements and numerical simulations show four distinct wake deficits in the near wake,which merge into a single-wake structure further downstream. Numerical simulations also show that the wake recovery distance of a simplified 4R-V29 wind turbine is 1.03–1.44 Deq shorter than for an equivalent single-rotor wind turbine with a rotor diameter Deq. In addition, the numerical simulations show that the added wake turbulence of the simplified 4R-V29 wind turbine is lower in the far wake compared with the equivalent single-rotor wind turbine. The faster wake recovery and lower far-wake turbulence of such a multi-rotor wind turbine has the potential to reduce the wind turbine spacing within a wind farm while providing the same production output.

U2 - 10.5194/wes-4-251-2019

DO - 10.5194/wes-4-251-2019

M3 - Journal article

VL - 4

SP - 251

EP - 271

JO - Wind Energy Science

JF - Wind Energy Science

SN - 2366-7443

IS - 2

ER -