Output voltage regulation of controlled rectifiers using feedback linearization control algorithm

PWM converters are usually controlled using linear control techniques. As the linear control techniques have a disadvantage of requiring tuning from time-to-time, non-linear control techniques were employed for the control. One such non-linear control technique is feedback linearization control (FBLC). A control strategy for controlling the output voltage of three phase PWM converters through a linearization technique is discussed in this paper. Feedback linearization technique allows a few advantages like the decoupled control of the state variables, wide operating region. The performance analysis of the converter control using FBLC is done for varied conditions of load. The results from simulation of the controller and the analysis made on the thus linearised system shows the effectiveness of the Feedback linearization technique on different operating conditions.