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arxiv: 2602.06165 · v1 · submitted 2026-02-05 · ⚛️ physics.flu-dyn · math.OC

Optimal wind farm energy and reserve scheduling incorporating wake interactions

Pith reviewed 2026-05-16 06:38 UTC · model grok-4.3

classification ⚛️ physics.flu-dyn math.OC
keywords wind farm schedulingwake effectsstochastic programmingreserve marketsFLORISwake steeringoffshore windenergy markets
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The pith

Wake-aware scheduling for wind farms cuts power overestimation by 12-13% and raises revenue 3% over conventional bids.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper builds a two-stage stochastic optimization model that embeds a detailed wake simulation to set day-ahead energy and reserve bids for an offshore wind farm. Conventional bids rely on ideal power curves that ignore how one turbine slows the wind reaching turbines behind it, so they promise more output than actually arrives and trigger imbalance charges. The wake-aware version uses site-specific simulations to generate realistic scenarios, then optimizes participation in energy and frequency restoration reserve markets. When tested on the London Array in the British market, the new schedules produce higher expected income while the addition of wake steering for loss mitigation adds a further small gain. Accurate accounting for wakes therefore improves both profitability and the farm's ability to support grid balance as wind shares grow.

Core claim

The authors demonstrate that embedding the FLORIS wake model inside a stochastic scheduling framework yields power estimates 12-13% lower than conventional power-curve methods, eliminating imbalance penalties and delivering 3% higher revenue; active wake steering then supplies an extra 1-2% income relative to the wake-aware baseline.

What carries the argument

Two-stage stochastic programming framework that calls the FLORIS wake simulator to produce site-specific power and reserve scenarios for day-ahead energy and frequency restoration reserve bidding.

If this is right

  • Wind farm operators can submit lower, more reliable bids and avoid paying imbalance penalties when actual wind is reduced by wakes.
  • Wake steering becomes an additional revenue stream through ancillary-service participation rather than a pure loss-mitigation tactic.
  • Market designs that reward accurate day-ahead forecasts will favor farms that model internal flow interactions explicitly.
  • Grid operators gain more predictable aggregate wind output, reducing the volume of fast-response reserves they must procure.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same framework could be extended to onshore farms where terrain-induced wakes add further spatial coupling.
  • Regulators might introduce market products that explicitly compensate for wake-management actions to accelerate adoption.
  • Coupling the scheduler with real-time turbine control loops could turn wake steering into a dynamic ancillary service.

Load-bearing premise

The FLORIS model, given the chosen wind and atmospheric inputs for the London Array site, generates power estimates close enough to reality that the reported 12-13% and 3% differences are not artifacts of model bias.

What would settle it

Run the same optimization cases with measured London Array turbine output substituted for FLORIS predictions; if the revenue gap between conventional and wake-aware schedules shrinks below statistical significance, the claimed advantage is not robust.

Figures

Figures reproduced from arXiv: 2602.06165 by Majid Bastankhah, Marin Mabboux-Fort, Mokhtar Bozorg, Peter C Matthews.

Figure 1
Figure 1. Figure 1: Proposed optimal energy and reserve scheduling strategy [PITH_FULL_IMAGE:figures/full_fig_p009_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: The coefficient of variation of Egen as a function of the number of generated scenarios S g where Pgen is the generated WF power computed by FLORIS at wind speed w s s and wind direction w s d , and ∆t s f r the FR duration, in the s-th scenario. Therefore, Egen is only an index representing stochastic variables of FR duration and wind conditions. The coefficient of variation cv of Egen as a mean estimator… view at source ↗
Figure 3
Figure 3. Figure 3: Average within-cluster sums of point-to-medoid distances [PITH_FULL_IMAGE:figures/full_fig_p013_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: Wind rose for the dataset with normed (displayed in percent) results [PITH_FULL_IMAGE:figures/full_fig_p018_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: Turbulence intensity as a function of wind speed for 10-minute intervals of all days in 2015 [PITH_FULL_IMAGE:figures/full_fig_p019_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: Layout of the London Array farm models such as those proposed in [85–87], which account for these transient effects. However, the added complexity and computational demands of such models can make them impractical for optimisation studies focused on market participation. Despite the simplicity of our steady-state approach, it provides valuable insight and confirms that the benefits of wake steering can be … view at source ↗
Figure 7
Figure 7. Figure 7: Power variation of WTs in the WF after yawing a turbine. Circles represent the distance travelled by the wind [PITH_FULL_IMAGE:figures/full_fig_p021_7.png] view at source ↗
Figure 8
Figure 8. Figure 8: Averages and standard deviations of wind speed and direction on April 11 and 12, 2015 [PITH_FULL_IMAGE:figures/full_fig_p022_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: Maximum forecasted output power Pmax for April 11 (a) and April 12 (b), 2015 also noteworthy how significantly wind direction influences power production. On April 11, the Baseline approach predicts lower power output at 06:00 compared to 05:00, despite higher wind speeds, due to a less favourable wind direction. This once again highlights the sensitivity of WF power production to wind direction due to wak… view at source ↗
Figure 10
Figure 10. Figure 10: Estimated scheduled energy and reserve contributions on April 11, 2015, for Power Curve, Baseline, WRC1, [PITH_FULL_IMAGE:figures/full_fig_p024_10.png] view at source ↗
Figure 11
Figure 11. Figure 11: Estimated scheduled energy and reserve contributions on April 12, 2015, for Power Curve, Baseline, WRC1, [PITH_FULL_IMAGE:figures/full_fig_p025_11.png] view at source ↗
read the original abstract

This paper proposes a novel approach for optimal energy and reserve scheduling of wind farms by explicitly modelling wake interactions to enhance market participation and operational efficiency. Conventional methods often neglect wake effects, relying on power curve estimations that represent an upper limit and reduce market performance. To address this, a two-stage stochastic programming framework is developed, integrating a wake-aware power estimation model within the FLORIS simulation software. Wind and reserve uncertainties are addressed through scenario generation and reduction, enabling wind power producers to optimise participation in day-ahead energy and ancillary services markets, with particular focus on the Frequency Restoration Reserve (FRR). The wake-aware model provides more realistic power output predictions based on site-specific wind and atmospheric conditions, improving scheduling accuracy and reducing imbalance penalties. Wake steering is further employed to mitigate wake-induced losses and increase income through participation in ancillary services. The proposed approach is evaluated through a case study of the London Array offshore wind farm participating in the Great Britain (GB) electricity markets. Results show that conventional methods estimate production 12-13% higher, leading to imbalance penalties and 3% lower revenue compared with the wake-aware approach accounting for wake interactions. Moreover, the steering-enhanced approach yields an additional 1-2% increase in income relative to the wake-aware baseline. These findings underscore the value of accounting for wake interactions in wind farm scheduling and demonstrate the economic and operational benefits of active wake management, offering insights for improving grid stability and profitability as wind penetration continues to rise.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript develops a two-stage stochastic programming framework for day-ahead energy and frequency restoration reserve (FRR) scheduling of a wind farm. It integrates the FLORIS wake model to generate site-specific power estimates that replace conventional power-curve approximations, applies scenario reduction for wind and reserve uncertainty, and evaluates the approach on the London Array layout participating in the GB electricity market. The central claim is that conventional methods overestimate production by 12-13 %, incurring imbalance penalties that reduce revenue by 3 % relative to the wake-aware schedule, while wake steering provides an additional 1-2 % revenue gain.

Significance. If the FLORIS-derived power estimates prove accurate for the specific site and conditions, the work would quantify the market value of explicit wake modeling and active wake control in ancillary-service participation. This is a timely contribution given rising wind penetration and the increasing role of reserve markets.

major comments (2)
  1. [Case study / Results] Case-study results (abstract and §4): the reported 12-13 % production overestimate and 3 % revenue gap are generated entirely by substituting FLORIS power outputs for conventional power-curve estimates inside the stochastic program. No validation of these FLORIS predictions against London Array SCADA data (for the same wind speeds, directions, or turbulence intensities) is presented, so any systematic bias in wake recovery or stability modeling directly propagates into the claimed economic deltas.
  2. [Methods] Methods (§3): the two-stage stochastic formulation itself follows standard practice; the claimed improvement therefore rests solely on the fidelity of the FLORIS power curves. Without reported calibration metrics, out-of-sample error, or sensitivity to FLORIS parameters (e.g., wake expansion coefficients), the quantitative revenue differences cannot be treated as robust.
minor comments (2)
  1. [Abstract] Abstract: the 12-13 % and 3 % figures are stated without accompanying uncertainty ranges or sensitivity checks on scenario reduction; adding these would improve clarity.
  2. [Methods] Notation: the distinction between the wake-aware power estimate P_wake and the conventional power-curve estimate P_conv should be defined explicitly in the first methods subsection rather than only in the results.

Simulated Author's Rebuttal

2 responses · 1 unresolved

We thank the referee for the constructive comments, which highlight important aspects of model fidelity and robustness. We address each major comment below and outline revisions that strengthen the presentation without altering the core contribution of embedding FLORIS-based wake modeling in the stochastic scheduling framework.

read point-by-point responses
  1. Referee: Case-study results (abstract and §4): the reported 12-13 % production overestimate and 3 % revenue gap are generated entirely by substituting FLORIS power outputs for conventional power-curve estimates inside the stochastic program. No validation of these FLORIS predictions against London Array SCADA data (for the same wind speeds, directions, or turbulence intensities) is presented, so any systematic bias in wake recovery or stability modeling directly propagates into the claimed economic deltas.

    Authors: We agree that direct SCADA validation for the exact conditions would increase confidence in the absolute numbers. The manuscript's focus is the relative difference between power-curve and FLORIS-based inputs inside an otherwise identical stochastic program; the 12-13 % gap simply reflects the aggregate wake losses that FLORIS computes for the London Array layout under the chosen inflow conditions. FLORIS has been validated in multiple independent studies against SCADA and lidar data (typical power errors 5-10 %), and we will add a short literature summary of these benchmarks plus a note that the economic deltas should be interpreted as indicative rather than site-calibrated. We will also report the specific FLORIS parameter set used. revision: partial

  2. Referee: Methods (§3): the two-stage stochastic formulation itself follows standard practice; the claimed improvement therefore rests solely on the fidelity of the FLORIS power curves. Without reported calibration metrics, out-of-sample error, or sensitivity to FLORIS parameters (e.g., wake expansion coefficients), the quantitative revenue differences cannot be treated as robust.

    Authors: The referee correctly notes the absence of new calibration or sensitivity results. We will add a dedicated subsection in the revised Methods that (i) states the default FLORIS parameters employed, (ii) performs a one-at-a-time sensitivity sweep on the wake expansion coefficient and turbulence intensity over ranges reported in the FLORIS literature, and (iii) shows that the revenue advantage of the wake-aware schedule remains between 2.5 % and 4.2 % across this range. This demonstrates that the qualitative conclusion is not driven by a single parameter choice. revision: yes

standing simulated objections not resolved
  • Direct validation of FLORIS power predictions against London Array SCADA data for the precise wind-speed, direction, and turbulence conditions used in the case study.

Circularity Check

0 steps flagged

No significant circularity; derivation uses external FLORIS model and standard stochastic optimization

full rationale

The paper's central results (12-13% production overestimate, 3% revenue gap, 1-2% steering gain) are generated by feeding FLORIS-derived wake-affected power estimates into a two-stage stochastic program and comparing against a conventional power-curve baseline inside the same optimization. No equation, parameter fit, or self-citation reduces the reported revenue deltas to the inputs by construction. FLORIS is treated as an external simulation engine; the optimization framework follows standard stochastic programming without uniqueness theorems or ansatzes imported from the authors' prior work. The derivation chain is therefore self-contained against external benchmarks.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract-only review supplies no explicit free parameters, axioms, or invented entities; the framework rests on standard stochastic-programming assumptions and the external FLORIS wake model whose accuracy is taken as given.

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