Abstract
This paper proposes the decoupling control of direct torque control (DTC) and vector control (VC) for doubly fed induction generator (DFIG)-based wind energy system (WES). DTC controls the generator speed, torque and rotor flux; similarly VC regulates the capacitor link voltage and power quality of grid. Furthermore, proposed technique analyzed with sliding mode control (SMC) and conventional controllers independently. SMC shows better improvements of both stator and rotor currents, capacitor link voltage, torque and generator speed in contrast to proportional and integral controller. The proposed DTC-VC aims to improve performance of transient and dynamic behavior of DFIG-based WES during sine nature of torque and random as well as step change variation of generator speed. It is also tested in real-time environment at 7.5 hp as well as MATLAB/Simulink of 5.5 kw rating.
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