A practical approach to the order reduction of a power system model for small signal stability analysis

A linearized power system model suitable for small signal stability analysis or automatic voltage regulators (AVR) and power system stabilizers (PSS) synthesis is derived in the paper. II is derived using the 5th order synchronous machine model with damping winding, the second order IEEE Type 1 AVR and the third order PSS, A new method of model 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 a real power system in Serbia. (C) 1997 Elsevier Science S.A.