AC power

Direct torque control

Electrical engineering

Physics

Torque

Stall torque

Space vector modulation

Inverter

Engineering

Voltage

Power optimizer

Rotor (electric)

Vector control

Artificial intelligence

Power (physics)

Control (management)

Turbine

Computer science

Quantum mechanics

Wind power

Maximum power point tracking

Control theory (sociology)

Power control

Mechanical engineering

Induction motor

Pulse-width modulation

Thermodynamics

Journal of Renewable and Sustainable Energy

This paper presents different control strategies for a variable-speed wind energy conversion system (WECS), based on a doubly fed induction generator. Direct Torque Control (DTC) with Space-Vector Modulation is used on the rotor side converter. This control method is known to reduce the fluctuations of the torque and flux at low speeds in contrast to the classical DTC, where the frequency of switching is uncontrollable. The reference for torque is obtained from the maximum power point tracking technique of the wind turbine. For the grid-side converter, a fuzzy direct power control is proposed for the control of the instantaneous active and reactive power. Simulation results of the WECS are presented to compare the performance of the proposed and classical control approaches.

Improved control strategy of DFIG-based wind turbines using direct torque and direct power control techniques