Output performance evaluation of the automatic voltage regulator system on pre-filter control technique

Abstract

The combination of an automated voltage regulator (AVR) system and controllers minimizes fluctuation caused by changes in load, speed, temperature, and power factor. This produces a voltage drop in the generator and destroys electricity equipment. This work corrects the divergence through the placement of a proportional integral and derivative (PID) controller with a low-pass filter (LPF) at the generator's input to enhance the AVR system operating principles. The improved performance was obtained by creating a nonlinear model of a synchronous generator, a PID controller, and an LPF in MATLAB/Simulink. At a load variation of 20 seconds, the suggested PID controller with LPF reduces the rise and peak times to 5.2975 seconds and 12.31 seconds, respectively. This raises the overshoot and settling time to 4.28 seconds and 17.60 seconds, respectively. However, the devised technique delivers a balanced temporal behavior for the selected generator voltages examined. The suggested scheme's performance was compared to that of a traditional PID-controlled AVR system without LPF. The proposed technique provides higher stability, which is demonstrated by the percentage overshoot of 4.5788% (for PID) and 4.2765% (for PID with LPF). This has contributed to the understanding of an AVR control system by improving the performance of the rise time, peak time, overshoot, and settling time for stable generator output voltage.