Voltage Control of a Power System with Exciter and Generator Saturation

摘要

This paper presents the control of voltage of a saturated power system using an Automatic Voltage Regulator (AVR) model. An unsaturated model of the system is first considered and then, this initial model is altered to include the effects of exciter and generator saturations. Since the amplifier has saturation limits in practice, these are also considered in the saturated system. The individual effect of the two types of saturations are analysed followed by an analysis of their combined effect. In order to obtain satisfactory responses in terms of settling time, percentage overshoot and steady state error, three types of compensating schemes were implemented, namely, Proportional Integral Derivative (PID), Fuzzy controller and Pi-Fuzzy controller.