Physics-Informed Estimation of Nacelle Free-Stream Wind SpeedUsing SCADA Measurements 


Vol. 15,  No. 1, pp. 70-74, Jan.  2026
10.3745/TKIPS.2026.15.1.70


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  Abstract

The performance evaluation of wind turbines strongly depends on the accurate estimation of free-stream wind speed. However, the nacelle wind speed commonly used in practice is typically lower than the actual atmospheric wind speed due to rotor induction and wake effects, which reduces the accuracy of aerodynamic analysis and digital twin models. Therefore, this paper proposes a physics-based correction method that estimates the free-stream wind speed from nacelle measurements by combining wind turbine SCADA data with the drivetrain power balance equation. The proposed method formulates the power balance equation as a nonlinear root-finding problem and applies the Brentq algorithm along with heuristic rules to correct the bias caused by rotor induction and wake effects. Evaluation results for both low- and high-wind-speed regions show that the estimated wind speed achieves improved accuracy across all metrics - RMSE, MAE, NSE, and CCC - compared to the nacelle wind speed, and maintains stable performance even in high-wind-speed regions where pitch control is active.

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[IEEE Style]

T. Kim and J. Hong, "Physics-Informed Estimation of Nacelle Free-Stream Wind SpeedUsing SCADA Measurements," The Transactions of the Korea Information Processing Society, vol. 15, no. 1, pp. 70-74, 2026. DOI: 10.3745/TKIPS.2026.15.1.70.

[ACM Style]

Taehyoung Kim and Jiman Hong. 2026. Physics-Informed Estimation of Nacelle Free-Stream Wind SpeedUsing SCADA Measurements. The Transactions of the Korea Information Processing Society, 15, 1, (2026), 70-74. DOI: 10.3745/TKIPS.2026.15.1.70.

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