Advances in Computational Design

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Neural network based direct torque control for doubly fed induction generator fed wind energy systems

  • Aftab Ahmed Ansari (Department of Electrical Engineering, Maulana Azad National Institute of Technology) ;
  • Giribabu Dyanamina (Department of Electrical Engineering, Maulana Azad National Institute of Technology)
  • Received : 2021.12.17
  • Accepted : 2023.05.15
  • Published : 2023.07.25
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Abstract

Torque ripple content and variable switching frequency operation of conventional direct torque control (DTC) are reduced by the integration of space vector modulation (SVM) into DTC. Integration of space vector modulation to conventional direct torque control known as SVM-DTC. It had been more frequently used method in renewable energy and machine drive systems. In this paper, SVM-DTC is used to control the rotor side converter (RSC) of a wind driven doubly-fed induction generator (DFIG) because of its advantages such as reduction of torque ripples and constant switching frequency operation. However, flux and torque ripples are still dominant due to distorted current waveforms at different operations of the wind turbine. Therefore, to smoothen the torque profile a Neural Network Controller (NNC) based SVM-DTC has been proposed by replacing the PI controller in the speed control loop of the wind turbine controller. Also, stability analysis and simulation study of DFIG using process reaction curve method (RRCM) are presented. Validation of simulation study in MATLAB/SIMULINK environment of proposed wind driven DFIG system has been performed by laboratory developed prototype model. The proposed NNC based SVM-DTC yields superior torque response and ripple reduction compared to other methods.

Keywords

References

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