Wind turbine power control based on aero dynamical torque estimation

Puleva, Teofana; Osuský, Jakub

doi:10.1109/cyberi.2016.7438608

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…It is obvious that V(x) is positive definite and radially unbounded. From (12), (14), and (15), its time derivative satisfiesV…”

Section: Theoremmentioning

confidence: 99%

“…34 Theorem 4. With the controller given in (14) and (15), the observers given in (21), (28), and (29), and observer gains satisfying Theorems 2 and 3, the tracking error x and estimation error x e in (35) are asymptotically stable at zero.…”

Section: Stability Analysismentioning

confidence: 99%

“…11 Another solution for this problem is to observe the aerodynamic torque instead of estimating wind speed. [12][13][14][15] In this approach, conventional observer algorithms such as sliding-mode observer and robust observers are applied to estimate the aerodynamic torque based on the assumption that aerodynamic torque is slowly varying. Unfortunately, as aerodynamic torque is proportional to square of wind speed, this assumption does not seem to be realistic.…”

Section: Introductionmentioning

confidence: 99%

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High‐order observers‐based LQ control scheme for wind speed and uncertainties estimation in WECSs

Duc

2018

Optim Control Appl Methods

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Tip speed ratio control is a popular method in wind energy conversion systems in order to capture the maximum power. This method, however, requires wind speed information, which is difficult in practice to accurately measure it. Therefore, estimation methods are usually applied, where a high-precision estimate leads to a high-efficient system. Based on the fact that the wind speed varies in a random way, this paper proposes a generalized high-order observer to estimate the aerodynamic torque and the wind speed accordingly. This observer algorithm releases the assumption that the wind speed should be slowly varying, which is required in previous observer designs. Moreover, two other generalized high-order observers are also applied to estimate the uncertainties, which depend on state variables and cannot be considered as slow-varying disturbances. Using the outputs of these observers, a robust high-performance optimal control system is developed for the rotor speed to keep the optimal tip speed ratio. The stability analysis of the designed control system is fully presented. The effectiveness of the proposed technique is validated via simulation studies. KEYWORDSgeneralized high-order observer, optimal control, uncertainties, wind energy conversion system (WECS), wind speed estimation 1818

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“…It is obvious that V(x) is positive definite and radially unbounded. From (12), (14), and (15), its time derivative satisfiesV…”

Section: Theoremmentioning

confidence: 99%

Section: Stability Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High‐order observers‐based LQ control scheme for wind speed and uncertainties estimation in WECSs

Duc

2018

Optim Control Appl Methods

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A Generalized Observer for Estimating Fast–Varying Disturbances

Duc

2018

IEEE Access

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Polynomial Observer-Based Controller Synthesis and Fault-Tolerant Control for Tracking Optimal Power of Wind Energy Conversion Systems

Ngo

Dung

et al. 2020

IEEE Access

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This paper proposes a new approach to design a fault-tolerant control (FTC) scheme for tracking the optimal power of wind energy conversion systems (WECSs). In this paper, the considered fault will not only impact on actuator but also sensors. As the fault severely affects the performance of WECSs, the FTC are required to be worked accurately and effectively. The polynomial observer, as a part of the proposed FTC system, is synthesized to estimate the aerodynamic torque, electromagnetic torque, and fault simultaneously without using sensors to measure. The information of these parameters is sent back to the LQR (Linear Quadratic Regular) controller of WECSs. Both fault and aerodynamic torque in this study are unnecessary to fulfil any constraint. It should be noted that WECSs is reconstructed to a new form based on the descriptor technique, then the observer will design for this new form instead of the original system. Based on Lyapunov methodology and with the aid of SOS (Sum-Of-Square) technique, the conditions for polynomial observer design are derived in the main theorems. Finally, the simulation results have proved the effectiveness and merit of the proposed FTC method.

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Wind turbine power control based on aero dynamical torque estimation

Cited by 4 publications

References 4 publications

High‐order observers‐based LQ control scheme for wind speed and uncertainties estimation in WECSs

High‐order observers‐based LQ control scheme for wind speed and uncertainties estimation in WECSs

A Generalized Observer for Estimating Fast–Varying Disturbances

Polynomial Observer-Based Controller Synthesis and Fault-Tolerant Control for Tracking Optimal Power of Wind Energy Conversion Systems

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