Transient Stability Analysis of a Two Machine Long Transmission System with Power System Stabilizer & Static Var Compensator

Power system stability dilemma demonstrates the effect of generator electro-mechanical oscillations & rotor angle swings on electrical grids.Power System Stabilizers(PSS) is an excitation controller used to damp out the generator electromechanical oscillations & rotor angle swings.But in severe faulted condition PSS cannot damped out the oscillations alone such as in case of a LLL-G fault.So in order to make the system stable by damping generator oscillations & rotor angle swings FACTS controllers(Flexible AC Transmission System) along with PSS are used cumulatively in power system.In this paper,transient stability studies of a two machine long transmission system with PSS(both generic & multi-band type) & SVC(Static Var Compensator) a shunt based FACTS controller for L-G fault & LLL-G fault have been investigated.All the performance analysis have been undergone using MATLAB simulation.