Preprints
https://doi.org/10.5194/wes-2026-120
https://doi.org/10.5194/wes-2026-120
16 Jul 2026
 | 16 Jul 2026
Status: this preprint is currently under review for the journal WES.

SCADA-based calibration of analytical wake models: uncertainty-aware generalisation across offshore wind farms and the role of atmospheric stability

Diederik van Binsbergen, Pieter-Jan Daems, Timothy Verstraeten, Konstantinos Vratsinis, Amir Nejad, and Jan Helsen

Abstract. This study presents a Bayesian framework for generalising SCADA-calibrated wake-model tuning parameters across offshore wind farms. The framework infers cluster-wide, farm-specific, and new-farm parameter distributions while accounting for calibration uncertainty, intra-farm variability, inter-farm variability, and residual model-data mismatch. It is applied to the Jensen and Gaussian TurbOPark wake models and extended to condition the central tuning parameter on atmospheric stability, represented by the bulk Richardson number and the inverse Monin-Obukhov length. For both wake models, unstable conditions are associated with larger tuning parameters, indicating faster wake expansion and recovery, whereas stable conditions yield smaller tuning parameters and more persistent wakes. The results show that the globally pooled stability-independent parameter should not be interpreted as a neutral-stability parameter because it reflects the stability mix at the case-study offshore site. Propagating representative stability-class-specific parameters to wake-loss estimates shows that atmospheric stability substantially affects predicted wake losses, with model differences becoming more pronounced when external wakes from surrounding wind farms are included.

Competing interests: At least one of the (co-)authors is a member of the editorial board of Wind Energy Science.

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Diederik van Binsbergen, Pieter-Jan Daems, Timothy Verstraeten, Konstantinos Vratsinis, Amir Nejad, and Jan Helsen

Status: open (until 13 Aug 2026)

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Diederik van Binsbergen, Pieter-Jan Daems, Timothy Verstraeten, Konstantinos Vratsinis, Amir Nejad, and Jan Helsen
Diederik van Binsbergen, Pieter-Jan Daems, Timothy Verstraeten, Konstantinos Vratsinis, Amir Nejad, and Jan Helsen
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Short summary
A key challenge for offshore wind farms is to quantify wakes reliably from turbine measurements. This study develops a statistical approach that learns from measured turbine data how these wakes vary between wind farms and transfers that knowledge to new sites with quantified uncertainty. It also assesses how atmospheric conditions affect wake recovery. The results show that stable conditions lead to slower recovery and larger predicted losses, while unstable conditions support faster recovery.
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