Output Regulation-Based Optimal Control System for Maximum Power Extraction of a Machine-Side Power Converter in Variable-Speed WECS
Sarsembayev B. Zhakiyev N. Kushekkaliyev A. Kayisli K. Do T.D.
2024Institute of Electrical and Electronics Engineers Inc.
IEEE Access
2024#128422 - 8431 pp.
In this study, the integral linear quadratic regulator (LQR) with servomechanism for machine-side power converter in PMSG-based variable-speed wind energy conversion systems (WECSs) has been proposed. The solution of the algebraic Riccati equation (ARE) has been found for the extended dimension of the state space equation of the system. The state vector has been extended with the integral of the angular shaft speed of the permanent magnet synchronous generator (PMSG) to penalize the errors. The maximum power tracking point (MPPT) algorithm is achieved by minimizing tracking errors between the angular shaft speed reference based on wind speed estimation and its actual values in the variable speed WECS. Also, the estimated aerodynamic torque is used to define the reference electromagnetic torque. This is possible when WECS is partially loaded and pitches angles are fixed at the position to generate maximum power. The mean absolute percentage error of the angular shaft speed of the PMSG-based WECS has been reduced by more than 71% under model uncertainty and noise presented case than in the traditional disturbance observers-based compensation scheme. While the disturbance observers for estimation model uncertainty are eliminated, the use of the high order disturbance observer for aerodynamic torque estimation proved to be necessary to enhance the reliability of wind speed sensors and hence the whole WECS.
integral servomechanism-based control , linear output feedback controller , linear quadratic regulator (LQR) , maximum power point tracking (MPPT) , optimal tip speed ratio (TCR) , permanent magnet synchronous generator (PMSG) , Wind energy conversion system (WECS)
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Nazarbayev University, School of Engineering and Digital Sciences (SEDS), Department of Aerospace and Environment Engineering, Astana, 010000, Kazakhstan
Astana It University, Department of Science and Innovation, Astana, 010000, Kazakhstan
West Kazakhstan University, Department of Physics, Uralsk, 090000, Kazakhstan
Gazi University, Engineering Faculty, Department of Electrical-Electronic Engineering, Ankara, 06560, Turkey
Nazarbayev University, School of Engineering and Digital Sciences (SEDS), Department of Robotics and Mechatronics, Astana, 010000, Kazakhstan
Nazarbayev University
Astana It University
West Kazakhstan University
Gazi University
Nazarbayev University
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