A UNIFIED APPROACH TO VOLTAGE REGULATOR AND POWER-SYSTEM STABILIZER DESIGN BASED ON PREDICTIVE CONTROL IN ANALOG FORM

A unified approach for voltage regulator and power system stabiliser d esign based on predictive control in the s domain is presented in this paper. The proposed controller employs the current and voltage compon ents along the d and q axis, I-d, I-q, V-d, as additional control sign als. The aim is to solve the conflicting demands of the control requir ements of generator terminal voltage regulation and damping of electri cal power oscillations. In the time domain, the results obtained have shown that the analogue predictive controller with fixed structure and parameter provides, unlike the conventional excitation control scheme (voltage regulator and power system stabiliser), a good consistent pe formance for cases of strong, as well as weak, tie line connection of the generator with the grid system. Copyright (C) 1996 Elsevier Scienc e Ltd