AVRs and PSSs Revisited

In this paper a conceptual analysis on the effect ofAutomatic Voltage Regulators (AVR) and Power SystemStabilizers (PSS) for small signal stability (SSS) of powersystems is developed. A modal formulation approachincluding the use of the Participation Matrix is used. TheModal Formulation is performed considering synchronousgenerator (SG) equations for both the Electromotive Forces(EMF) model and the Flux Linkages (FL) model as well asAVR and PSS equations. Then, a selected study case isevaluated to study the effect of the AVR and PSS on thesmall signal stability. For pedagogical purposes acomparison between the basic RLC circuit and asynchronous generator connected to an infinite bus, toclarify the concepts of synchronizing torque and dampingtorque, is presented.1. IntroductionValiderad; 2016; Nivå 1; 20160113 (andbra