Analysis of Multi-Machine Power System with PSS using Participation Factor Method

The power system stabilizer (PSS) plays a key role in multi-machine power systems. The main objective of PSS is to provide damping of the rotor oscillations, whenever there is a transient disturbance. In this paper, eigenvalues and participation factor are used to identify the oscillatory modes in a multi-machine system without and with PSS. The transient simulation is carried out to validate the steady state model. The proposed methods runs for N-number of buses and M-number of generators. The study system comprises a 4-generators and 10-buses two area multi-machine system. The results obtained on the study system show that oscillatory response of speed deviation and rotor angle is well damped with PSS.