A REDUCED-ORDER MULTIMACHINE POWER-SYSTEM MODEL SUITABLE FOR SMALL-SIGNAL STABILITY ANALYSIS

The linearized power system model convenient for small signal stabilit y analysis or automatic voltage regulators (AVR) and power system stab ilizers (PSS) synthesis is derived in the paper. It is derived using t he fifth order synchronous machine model with damping winding, the sec ond order IEEE Type 1 AVR and the third order PSS. A new method of mod el construction and decoupling is given. Using a singular perturbation method the power system model is separated into decoupled lower order slow and fast subsystems. The new proposed model was tested on the re al power system of Serbia. (C) 1998 Elsevier Science Ltd. All rights r eserved.