Lifetime extension of waked wind farms using active power control

This paper studies a new active power control (APC) of waked wind farms in order to extend the lifetime of highly loaded wind turbines. We demonstrate that the structural fatigue loading of a single turbine can be significantly alleviated, while the wind farm power production follows a power referen...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-07, Vol.1256 (1), p.12029
Main Authors: Vali, M, Petrović, V, Pao, L Y, Kühn, M
Format: Article
Language:English
Subjects:
Active control
Atmospheric boundary layer
Bending moments
Computational fluid dynamics
Game theory
Large eddy simulation
Materials fatigue
Optimization
Power control
Reference signals
Service life assessment
Turbines
Turbulence
Wind farms
Wind power
Wind turbines
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Summary:This paper studies a new active power control (APC) of waked wind farms in order to extend the lifetime of highly loaded wind turbines. We demonstrate that the structural fatigue loading of a single turbine can be significantly alleviated, while the wind farm power production follows a power reference signal. Then, an optimization problem, subjected to a data-driven fatigue load model, is formulated to balance the lifetime fatigue loading of the wind turbines operating within a waked wind farm. A Game-Theoretic (GT) approach is employed to find a lifetime fraction, wherein a wind turbine should actively reject its own dynamic loadings due to turbulence. A large-eddy simulation model is employed for resolving the turbulent flow, the wake structures and its interaction with the atmospheric boundary layer. The applicability and key features of the controller are discussed with a wind farm example consisting of 2×2 turbines. The overall increase of wind farm lifetime is evaluated using the damage equivalent load (DEL) of the tower base fore-aft bending moment of the individual wind turbines.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1256/1/012029