Notice to ReadersI have prepared a CD_ROM containing the data and results for all examples used in this book. The data are in the form ofMATLAB m-files, and the results are given as MA TLAB binary files.

A fundamental study of the nature of inter-area oscillations in power systems is presented. The effects of the system structure, generator modelling, excitation type, and system loads are discussed in detail. In the study, both small signal and transient stability analyses are used to determine the characteristics of the system.

This paper provides a detailed account of analytical work carried out to determine the parameters of power system stabilizers for a large generating station.Small signal and transient stability studies are reported which demonstrate the effectiveness of the stabilizers in enhancing the stability of inter-area as well as local plant modes of oscillation.Performance of two alternative schemes, one with and the other with no transient exciter gain reduction, are investigated. Kevwords Excitation Control -Power System Stabilizers -Steady State Stability -Transient Stability. 0885-8950/89/0500-0614$01 .WO 1989 IEEE

This paper discusses and compares different control techniques for damping undesirable interarea oscillation in power systems by means of power system stabilizers (PSS), static var compensators (SVCs), and shunt static synchronous compensators (STATCOMs). The oscillation problem is analyzed from the point of view of Hopf bifurcations, an "extended" eigenanalysis to study different controllers, their locations, and the use of various control signals for the effective damping of these oscillations. The comparisons are based on the results obtained for the IEEE 50-machine, 145-bus test system, which is a benchmark for stability analysis.

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