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Proceedings ArticleDOI

Torque and pitch angle control for variable speed wind turbines in all operating regimes

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TLDR
Simulation results demonstrate the effectiveness of the proposed control system for wind turbine operating in all wind speed regimes, and the robustness of the control strategy is guaranteed through the incorporation of the turbine torque estimator.
Abstract
In this paper, a multivariable control strategy is proposed for variable speed wind turbines operating in the two primary regimes, below-rated and above-rated wind speeds. A torque controller, based on the achievement of zero speed-tracking error, is developed to follow a trajectory that allows the wind turbine to operate with maximum power extraction in below-rated regime. The turbine torque is unknown to the controller, and its effect on it is compensated by estimation. In above-rated wind speed regime, a pitch angle controller is added to maintain a constant rated power, while the torque controller regulates the rotor speed to follow a constant nominal speed. The robustness of the control strategy is guaranteed through the incorporation of the turbine torque estimator. Simulation results demonstrate the effectiveness of the proposed control system for wind turbine operating in all wind speed regimes.

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Citations
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Journal ArticleDOI

State-of-the-art in wind turbine control: Trends and challenges

TL;DR: In this paper, a review of various control strategies that are used in wind turbine systems, both in low and high wind speed regions focusing primarily on multi-objective control schemes is presented.
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Advanced control for wind energy conversion systems with flywheel storage dedicated to improving the quality of energy

TL;DR: In this article, two techniques of commands DTC (direct torque control) and DPC (direct power control) applied in the system of converting wind energy with storage are presented.
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Supervisory control of a variable speed wind turbine with doubly fed induction generator

TL;DR: In this paper, an on-shore variable speed wind turbine with doubly fed induction generator and under supervisory control is presented, where an event-based supervisor for the supervision level and fuzzy proportional integral or discrete adaptive linear quadratic as proposed controllers for the execution level are evaluated.
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Advanced Control of a PMSG Wind Turbine

TL;DR: Results obtained in MATLAB/Simulink environment show that the fuzzy and the neuro control is more robust and has superior dynamic performance and hence is found to be a suitable replacement of the conventional PI controller for the high performance drive applications.
References
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Proceedings ArticleDOI

Pitch-controlled variable-speed wind turbine generation

TL;DR: In this paper, the authors investigated the performance of variable-speed wind turbines with pitch control and generator load control, and showed that the wind turbine can be operated at its optimum energy capture while minimizing the load on the turbine for a wide range of wind speeds.
Journal ArticleDOI

Multivariable control strategy for variable speed, variable pitch wind turbines

TL;DR: In this paper, a multivariable control strategy for variable speed, variable pitch wind turbine is proposed for the above-rated power operating condition, which is realized by combining a nonlinear dynamic state feedback torque control strategy with a linear control for blade pitch angle.
Proceedings ArticleDOI

Pitch angle control for variable speed wind turbines

TL;DR: In this article, a fuzzy logic pitch angle controller is developed in which it does not need well known about the system and the mean wind speed is used to compensate the non-linear sensitivity.
Proceedings ArticleDOI

Wind speed sensorless maximum power point tracking control of variable speed wind energy conversion systems

TL;DR: In this article, a maximum power point tracking (MPPT) controller for variable speed wind energy conversion system (WECS) is proposed, which generates at its output the optimum speed command for speed control loop of rotor flux oriented vector controlled machine side converter control system using only the instantaneous active power as its input.
Journal ArticleDOI

Pitch Angle Control of Variable Speed Wind Turbine

TL;DR: In this article, a simple controller to maximize the extracted energy of wind turbines is designed to extract maximum available energy, reduction of torque and output power variations, which gives stresses in the gearbox and mechanical structure.
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