Adaptive envelope protection control of wind turbines under varying operational conditions

Şahin, Mustafa Ergin; Yavrucuk, Ilkay

doi:10.1016/j.energy.2022.123544

Cited by 11 publications

(2 citation statements)

References 23 publications

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“…With the continuously increasing installed wind-power capacity, control strategies for wind farms and their effects on the secure and stable operation of power grids have attracted increasing attention [1][2][3][4]. As one of the main wind-farm models, the doubly fed induction generator (DFIG) has been widely used in wind power generation systems [5,6].…”

Section: Introductionmentioning

confidence: 99%

Low‐voltage ride‐through handling in wind farm with doubly fed induction generators based on variable‐step model predictive control

Nie

Zhang

Liu

et al. 2023

IET Renewable Power Gen

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A severe voltage sag on the wind‐farm grid side with doubly fed induction generators (DFIGs) can induce a peak inrush current in the rotors and damage converters, resulting in wind‐turbine disconnection from the grid. To prevent this from happening, a variable‐step model predictive control (VS‐MPC) strategy is proposed for improving the wind turbines’ ability to operate without disconnecting themselves from the grid when a fault occurs. First, the predictive‐control state‐space model of a doubly fed wind farm is established according to its working principle. Second, model predictive control (MPC) is applied on the rotor side of the DFIG to realize the rapid tracking of the rotor current to the reference value during low‐voltage ride‐through (LVRT) of the DFIG. Finally, a variable‐step size algorithm is introduced into the MPC controller to change the step size continuously during the LVRT period. This increases the control accuracy, realizing rapid attenuation of each transient component, whereby the wind‐farm LVRT capability is enhanced. The proposed control strategy was simulated and verified using MATLAB/Simulink. The simulation results indicated that VS‐MPC can effectively handle LVRT, allowing the recovery of a wind farm that uses DFIGs and improving the performance of wind‐farm.

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Section: Introductionmentioning

confidence: 99%

Low‐voltage ride‐through handling in wind farm with doubly fed induction generators based on variable‐step model predictive control

Nie

Zhang

Liu

et al. 2023

IET Renewable Power Gen

View full text Add to dashboard Cite

show abstract

“…A method has been proposed to protect the wind turbine against the impulses and intense oscillations involved in switching between the different regions (Ali and Moradi, 2020). A method for adaptive envelope protection control of wind turbines under varying operational conditions has been proposed by Sahin and Yavrucuk (2022). A linear parameter-varying anti-windup controller has also been proposed to improve the transition between low-and high-wind speed operations (Inthamoussou et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Flexible torque control for wind turbines considering frequency response under wind speed crossing region

Wang

Guo

et al. 2023

Front. Energy Res.

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The operational range of a wind turbine is typically divided into two regions based on wind speed: below and above the rated wind speed. The turbine switches between these two regions depending on the prevailing wind speed; however, during the transition, the generator may undergo transient shocks in torque, which can negatively impact both the mechanical load of the turbine and the reliability of the power system. This article presents a flexible torque control method for wind turbines, specifically designed to handle the transition between wind speed regions when the turbine is participating in frequency regulation. First, the anomalies in generator torque caused by traditional torque control methods during frequency response scenarios are analyzed. Next, two methods—dynamic deloading and flexible torque control—are developed to address these issues. The developed methods set transition regions based on generator speed, which helps to reduce the impact of transient changes in generator torque. Importantly, the addition of transition regions does not require additional feedback, making the controller easy to implement. The response characteristics of the proposed methods are then analyzed under different deloading factors and wind speeds using model linearization. Simulation studies are presented to verify the effectiveness of the proposed methods. Overall, this study demonstrates the potential value of flexible torque control methods for wind turbines, which can help to mitigate the negative impact of torque shocks and improve the reliability and efficiency of wind power systems.

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Active alleviation of fatigue stress on blades by adaptively maneuvered deformable trailing edge flaps (DTEF)

Govindan,

Natarajan,

Saini

2023

Environ Sci Pollut Res

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Adaptive envelope protection control of wind turbines under varying operational conditions

Cited by 11 publications

References 23 publications

Low‐voltage ride‐through handling in wind farm with doubly fed induction generators based on variable‐step model predictive control

Low‐voltage ride‐through handling in wind farm with doubly fed induction generators based on variable‐step model predictive control

Flexible torque control for wind turbines considering frequency response under wind speed crossing region

Active alleviation of fatigue stress on blades by adaptively maneuvered deformable trailing edge flaps (DTEF)

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