Enhanced controllers of DFIG with unbalanced and distorted grid voltage conditions

Abstract

This project focuses on the enhanced and development of the controller of doubly fed induction generator (DFIG) with unbalanced and distorted grid voltage conditions. Real, reactive power and electromagnetic torque are improved by using the design and development of the proportional integral-dual frequency resonator (PI-DFR), Second order generalized integrator (SOGI), Frequency locked loop (FLL), multiple second order generalized integrator-frequency locked loop (MSOGI-FLL). Finally fundamental, fifth and seventh order harmonics are removed by using Fast Fourier transform (FFT) and also determine Total harmonic distortion (THD) and Individual harmonic distortion (IHD). The simulation result is exposed using power system computer aided design (PSCAD).