Enhancement DTC Control for SEIG in Variable-Speed Wind Turbines, Associated with an Energy Storage System

Abstract

This research focuses on the application of the Direct Torque Control (DTC) strategy to manage the terminal voltage of a Self-excited induction generator (SEIG) that supplies power to an autonomous load. The SEIG is connected to a three-level Neutral Point Clamped (3L_NPC) converter. The utilization of the 3L_NPC converter ensures the increase in generated voltage levels, leading to improved current waveform quality and reducing the Total Harmonic Distortion (THD) in the stator currents. To ensure a more stable and dependable power supply, this study also introduces an Energy Storage System (EESS) consisting of batteries (BT) along with a management algorithm designed to oversee power flows between different storage devices. Furthermore, the dynamic model of the SEIG incorporates the saturation effect of magnetic materials and is conducted in the frame using the Concordia transform. The efficacy of the proposed control strategy is verified through simulation tests conducted in MATLAB/Simulink.

Keywords

• dtc control
• induction generator
• battery storage